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side-by-side code changes report for "NEWS": 2.4.5_vs_2.4.6
1 NEWS - list of user-visible changes between releases of GNU Libtool
3 * Noteworthy changes in release 2.4.6 (2015-02-15) [stable]
5 ** New features:
7 - LT_SYS_LIBRARY_PATH can be set in config.site, or at configure time
8 and persists correctly in the generated libtool script.
10 ** Bug fixes:
12 - Fix a race condition in ltdl dryrun test that would cause spurious
13 random failures of that test.
15 - LT_SYS_DLSEARCH_PATH is munged correctly.
18 * Noteworthy changes in release 2.4.5 (2015-01-19) [stable]
20 ** New features:
22 - Libtoolize searches for the best available M4 on the user PATH at
23 runtime, rather than settling for the first one found.
25 - Support munging sys_lib_dlsearch_path_spec with LT_SYS_LIBRARY_PATH
26 environment variable.
28 ** Bug fixes:
30 - Bail out at configure time if the installed M4 is not sufficient
31 for the purposes of libtoolize.
33 - freebsd-elf library versioning was upgraded incorrectly in 2.4.4,
34 but now works properly again.
36 - Fix a 2.4.4 regression so that libltdl subprojects do not warn
37 about missing libltdl/libltdl directory as in prior releases.
39 - When using Sun C++ on Solaris or GNU/Linux we used to set libtool's
40 postdeps permanently, based on the contents of $CXX and $CXXFLAGS at
41 configure time, which was brittle and error-prone. Now, we no
42 longer check for a SunCC ABI at configure time, but augment the
43 postdeps at libtool time based on the current invocation flags on
44 each call.
46 ** Changes in supported systems or compilers:
48 - /usr/local prefixed rpaths are now added to the link-line on
49 ia64-hp-hpux*, because the default system runtime loader path does
50 not contain them.
52 - Previously, when using Sun C++ on Solaris or GNU/Linux, `-Cstd -Crun`
53 flags were added to $postdeps unless CXX or CXXFLAGS contained
54 `-library=stlport4`. Newer releases have added other compiler flags
55 that are also incompatible with `-Cstd -Crun`, so now we don't add
56 them if any of `-std=c++[0-9][0-9]`, `-library=stdcxx4` or
57 `-compat=g` were found in CXX or CXXFLAGS when the Sun C++ compiler
58 is detected.
61 * Noteworthy changes in release 2.4.4 (2014-11-29) [stable]
63 ** New features:
65 - Libltdl maintains its own fork of argz, with macros and files in
66 the LT_ and lt__ namespaces (resp.) where they cannot clash with
67 client projects' use of gnulib argz.
69 ** Bug fixes:
71 - Installation of 'libtoolize' once again obeys '--program-prefix',
72 '--program-suffix' and '--program-transform-name' configure options.
74 - `libtoolize` doesn't remove any files that it can't reinstall,
75 including old versions of the snippet directory, and gnulib's
76 version of the argz module and supporting files.
78 - LT_FUNC_DLYSM_USCORE now works correctly on systems that don't
79 support self dlopen()ing.
81 ** Important incompatible changes:
83 - LT_LIB_DLLOAD no longer prepends -ldl or -ldld to LIBS, causing
84 duplicate occurrences in libltdl link lines. If you need to
85 add a library for dlopen() or shl_load() in your Makefile, then
86 use $(LIBADD_DLOPEN) or $(LIBADD_SHL_LOAD) respectively. If you
87 are using libltdl, this all happens automatically, and the only
88 difference you'll see is no more duplicated library names in the
89 verbose link line.
91 ** Changes in supported systems or compilers:
93 - Preliminary support for tcc on linux*. Although it already worked
94 sometimes in previous releases, making sure to set LD correctly now
95 avoids mis-matching GNU ld with tcc:
97 ./configure CC=tcc LD=tcc
99 - Added -os2dllname option to work around 8 character base name
100 limit on OS/2. The option has no effect on other systems.
102 - Support for DLL versioning, -export-symbols and -export-symbols-regex
103 on OS/2.
105 - Support filename-based shared library versioning on AIX. See manual
106 for details.
109 * Noteworthy changes in release 2.4.3 (2014-10-27) [stable]
111 ** New features:
113 - Moved to gnulib release infrastructure.
115 - M4 is now used for scanning the M4 macros in your configure.ac that
116 'libtoolize' looks at to determine what files you want, and where you
117 would like them installed. This means that you can compose your
118 version number or any other argument that Libtoolize needs to know at
119 M4 time using git-version-gen from gnulib, for example.
121 - Invoking 'libtoolize --ltdl' no longer maintains a separate autoconf
122 macro directory in the libltdl tree, but automatically adjusts the
123 installed libltdl configuration files to share whatever macro
124 directory is declared by the parent project. (Note: if you were
125 already sharing a macro directory with AC_CONFIG_MACRO_DIR(ltdl/m4)
126 or similar, that still works as does any other directory choice).
128 - Invoking 'libtoolize --ltdl' no longer maintains a separate auxiliary
129 scripts directory in the libltdl tree, but automatically adjusts the
130 installed libltdl configuration files to share whatever auxiliary
131 scripts directory is declared by the parent project. (Note: if you
132 were already sharing an auxiliary directory with subproject libltdl
133 using AC_CONFIG_AUX_DIR(ltdl/config) or similar, that still works as
134 does any other directory choice).
136 - The legacy tests have all been migrated to the Autotest harness.
138 - The Autotest testsuite can be run without the especially time consuming
139 tests with:
141 make check-local TESTSUITEFLAGS='-k "!expensive"'
143 ** Bug fixes:
145 - Fix a long-standing latent bug in autom4te include path for autotests
146 with VPATH builds.
147 - Fix a long-standing latent bug in libtoolize that could delete lines
148 from libltdl/Makefile.am in recursive mode due to underquoting in a
149 sed script.
150 - Fix a long-standing bug in libtoolize, by outputting the 'putting
151 auxiliary files in' header with 'libtoolize --ltdl --subproject'.
152 - Fix a long-standing bug in libtoolize subproject installation, by not
153 installing a set of autoconf macro files into the parent project if
154 there is no configure.ac present to use them.
155 - The libtoolize subproject mode selector is now named '--subproject'
156 and is equivalent to the implied '--subproject' mode when no other
157 mode is selected; '--standalone' never worked, and is no longer
159 - Libtool and libtoolize no longer choke on paths with a comma in them.
160 - In the case where $SHELL does not have the same enhanced features
161 (e.g. the ability to parse 'var+=append') as $CONFIG_SHELL, libtool
162 will now correctly fallback to using only vanilla shell features
163 instead of failing with a parse at startup.
164 - Correctly recognize import libraries when Microsoft dumpbin is used
165 as the name lister and extend the dumpbin wrapper to find symbols
166 in import libraries using the -headers option of dumpbin. Also fix a
167 bug in the dumpbin wrapper that could lead to broken symbol listings
168 in some corner cases.
169 - Use the improved Microsoft dumpbin support to mend preloading of
170 import libraries for Microsoft Visual C/C++.
171 - No longer mangle module-definition (.def) files when feeding them to
172 the Microsoft Visual C/C++ linker via the -export-symbols argument to
173 the libtool script, thus matching how .def files are handled when
174 using GNU tools.
175 - Recognize more variants (e.g. those starting with a LIBRARY statement)
176 of module-definitions (.def) files when using them instead of a raw
177 list of symbols to export.
178 - Fix a long-standing bug when using libtoolize without automake; we
179 no longer remove install-sh with --force, since it's not a file
180 libtoolize will reinstall without --install..
182 ** Important incompatible changes:
184 - GNU M4 is required to run libtoolize in a directory with a
185 'configure.ac' (or 'configure.in') that needs tracing to determine
186 what modes and directories have been specified.
188 - The use of the idiosyncratically named 'Makefile.inc' in nonrecursive
189 libltdl builds is deprecated, although it will be supported for one
190 more year or until the next release, whichever takes longer. Please
191 upgrade to the more standard naming of 'ltdl.mk' in keeping with other
192 GNU projects.
194 - libtoolize now behaves consistenty in respect of multiple directory
195 arguments to ACLOCAL_AMFLAGS and multiple invocations of AC_CONFIG-
196 _MACRO_DIRS, where the first directory is always selected. Previous
197 releases took the first ACLOCAL_AMFLAGS argument, but the last
198 invocation of AC_CONFIG_MACRO_DIRS.
200 - The libtoolize program now advises use of the new Autoconf
201 AC_CONFIG_MACRO_DIRS declaration. If you follow that advice, all
202 your developers will need at least autoconf-2.70 and automake-1.13
203 to rebootstrap your probject. If you still need to support
204 bootstrap with older Autotools, then you should add the following
205 to your configure.ac file:
211 - Overhead of probing for a non-backslash crippled echo equivalent
212 during initialization of every script has been removed in favor of
213 trusting that "printf %s\n" works out of the box on all non-museum
214 host architectures. Manually setting ECHO appropriately in the
215 build environment will be necessary on some ancient architectures.
217 ** Changes in supported systems or compilers:
219 - Support for bitrig (*-*-bitrig*).
221 - Solaris 7 and earlier requires ECHO=/usr/ucb/echo in the build
222 environment, to build and use libtool.
224 New in 2.4.2 2011-10-17: git version 2.4.1a, Libtool team:
226 * New features:
228 - The --with-pic configure option now supports a list of comma-separated
229 package names. This can be used to build some static libraries with PIC
230 objects while building others with non-PIC objects.
232 - Initial support for Go, using the gccgo compiler.
234 - On Mac OS X .dylib is now tried as well as .so with
237 * Bug fixes:
239 - The generic approximation of the command line length limit (when getconf is
240 not available) works again. Regression introduced in v2.2.6-39-g9c3d4d8.
241 - The bug that leaked developer tool paths into the release tarballs
242 from ./bootstrap is fixed.
243 - Improved support for the Cuda Compiler Driver (nvcc) on Darwin.
244 - For GCC LTO support, the -fuse-linker-plugin switch is now also removed
245 when computing compiler postdeps.
247 * Important incompatible changes:
249 - The undocumented hardcode_libdir_flag_spec_ld tag variable has been
250 removed in favor of using hardcode_libdir_flag_spec with $wl set to empty.
252 * Changes in supported systems or compilers:
254 - Fixes for gfortran on Darwin, XL Fortran on GNU/Linux.
255 - Support for FreeBSD 1.x (outdated since 1994) has been removed.
257 New in 2.4 2010-09-22: git version 2.2.11a, Libtool team:
259 * New features:
261 - Sysroot support. This allows you to build cross-compiled packages
262 with the same prefix that will be used on the destination machine,
263 and still find dependent libraries under the compiler's "sysroot".
264 Without sysroot support, paths internal to the build system may leak
265 into the product of the build.
267 Sysroot support is disabled unless the --with-sysroot configure
268 option is passed to configure, because .la files generated with
269 sysroot support will _not_ be usable in general with older Libtools.
271 - On non-cygwin Windows systems, we now lookup potential library
272 file names without regard to file name case.
273 - The old testsuite now uses the 'parallel-tests' Automake test driver
274 now for more concurrency and better test logging. For this, tests are
275 run in verbose mode by default now.
277 * Important incompatible changes:
279 - Autoconf 2.62 and Automake 1.11.1 or newer are now required for
280 bootstrapping Libtool. For using Libtool in your own projects,
281 Autoconf 2.59 and Automake 1.9.6 should still work.
282 - The fix_srcfile_path variable has been replaced by a more thorough
283 mechanism triggered by the to_tool_file_cmd variable.
285 * Changes in supported systems or compilers:
287 - Initial support for the Microsoft C/C++ Compiler, with help from
288 the compile script in unreleased Automake 1.12. Override the manifest
289 tool used to embed the manifest resource through the environment
290 variable MANIFEST_TOOL. Please note that the import library naming
291 has changed (from foo-2.lib to foo.dll.lib) from when the code lived
292 in its own git branch.
293 - Initial support for the NAG Fortran compiler on GNU/Linux.
295 * Bug fixes:
297 - The 'check-interactive' and 'check-noninteractive' convenience make
298 targets now also work for the old testsuite.
299 - Warnings from Autoconf v2.67-36-g1e604ec about incomplete programs
300 passed to AC_*_IFELSE tests have been fixed.
301 - On IRIX, the test for -Wl,-exported_symbol now also works with gfortran.
303 New in 2.2.10 2010-06-10: git version 2.2.9a, Libtool team:
305 * New features:
307 - On non-cygwin Windows systems, we no longer try to lookup the POSIX
308 format path recorded in $libdir of a pseudo-library when looking up
309 the location of the library with the native tools.
311 New in 2.2.8 2010-06-05: git version 2.2.7c, Libtool team:
313 * No new features:
315 - Bumped version number and promoted 2.2.7b release candidate to a full
316 stable release.
318 New in 2.2.7b 2010-05-20: git version 2.2.7a, Libtool team:
320 * New features:
322 - Libtool ships and installs man pages for libtool and libtoolize now.
323 - New libtool command line flag --help-all.
324 - New libtool command line flag --no-silent (with alternate spelling
325 --no-quiet). This flag (re)enables the default informational messages,
326 but has no effect on so-called "verbose" output messages.
327 - New libtool command line flag --no-verbose, which disables only
328 the extra "verbose" output messages and has no effect on the
329 default informational messages.
330 - New convenience make targets 'check-noninteractive' to avoid long testsuite
331 runs on Windows with popup windows in the middle, and 'check-interactive'
332 for the complement set of tests.
333 - New link mode flag -bindir to specify the location for installed PE DLLs.
334 - Wrapper scripts and wrapper executables for programs linked against
335 uninstalled shared libraries now support command-line options --lt-debug
336 and --lt-dump-script.
338 * Important incompatible changes:
340 - The wrapper command line option support described above introduces the
341 following incompatibility: the wrapper will remove any command line
342 options that begin with '--lt-*' from the argument list before launching
343 (uninstalled) programs. Any '--lt-*' option on the command line not
344 recognized by the wrapper will result in an error.
345 - The type of the symbol lists variables (lt_*_LTX_preloaded_symbols) has
346 been fixed in the manual and in a couple of tests to match the actual
349 * Changes in supported systems or compilers:
351 - Improved support for 64bit Windows (mingw64).
352 - Improved support for cegcc (Windows CE/PocketPC).
353 - Support for GNU/kOpenSolaris (kopensolaris*-gnu).
354 - Initial support for compilers on BlueGene BG/P.
355 - Improved support for Atari FreeMiNT.
356 - With binutils 2.19.50+, shared libraries can be built on AIX.
357 - Initial support for the Cuda Compiler Driver on GNU/Linux.
358 - Support for Haiku (i586-pc-haiku).
359 - Initial support for GCC link-time optimization (LTO) flags.
361 * Bug fixes:
363 - Fix 2.2.6 regression that prevented using the libltdl macros together
364 with Autoconf 2.59 ('possibly undefined macro: LT_LIBEXT').
365 - Fix 2.2.4 regression that caused arguments with special characters
366 to be mangled by the compile wrapper for uninstalled programs on MinGW.
367 - libtool command line flag --verbose now also enables explicit
368 verbose output, in addition to its previous behavior of (re)enabling
369 only the default informational output. See New Features, --no-silent.
370 - Link tests are guarded by cache variables so they can be avoided for
371 bootstrapping purposes (e.g., when link tests are not possible).
372 - Argument mangling of execute mode has been improved (i.e., lessened).
373 - Fix 2.1b regression that caused nm to not be the default name lister.
374 The regression affected mainly (arguably broken) cross compiles.
375 - Fix long standing bug that caused compiler checks for Fortran and
376 C++ compilers to run twice.
377 - Link mode works around a parallel build failure on Darwin 9.6.0 due
378 to the 'ar' 'flock'ing an archive upon extraction, by protecting the
379 extraction of convenience archives with a lock.
380 - The Libtool macro files do not contain instances of __oline__ any more,
381 easing merges for configure scripts that are added to version control.
382 - Fix ancient bug where "-Wc," was turned into "$wl" (typically "-Wl,")
383 when using the compiler driver to link programs. Now "-Wc," is stripped
384 just as it is when linking libraries through the compiler driver.
385 - Symbol versioning works with the GNU gold linker now.
386 - Fixes for detection of shared library dependencies on MinGW systems.
387 - Fixed Sun compiler detection on Solaris with sunCC, sunf77 etc. names.
389 * Miscellaneous changes:
391 - The manual is distributed under the terms of the GNU FDL 1.3 now.
393 New in 2.2.6 2008-09-05: git version 2.2.5a, Libtool team:
395 * New features:
397 - New lt_dloadvise_preload() call to set a hint that only preloadeded
398 modules can be opened.
399 - libtoolize no longer removes config.guess and config.sub, even when
400 --install is passed.
402 * Changes in supported systems or compilers:
404 - Fixes for ifort on Darwin, and newer Intel compilers (icc 10, ifort 9)
405 on GNU/Linux.
406 - Fixes for cwrapper (cygwin/mingw) under -stdc=c99.
407 - Support cross compile of MinGW with Wine.
408 - Initial support for cegcc (Windows CE/PocketPC) cross compilation.
409 - Initial support for lf95 (Lahey Fortran 8.1) on GNU/Linux.
411 * Bug fixes:
413 - Several testsuite issues have been fixed, thanks to user feedback.
415 - Fix 2.2 regression that caused argz symbols to be exported from
416 libltdl unrenamed on systems that do not have working argz.
418 - Revert "lt_dlopen(NULL) works on AIX again.". It was not the
419 correct fix.
421 - Diagnose '-L' arguments correctly.
423 - Libtool no longer tries to open devices as files in execute mode.
425 - Libtool no longer removes *.gcno profile information from GCC.
427 New in 2.2.4: 2008-05-04: git version 2.2.3a, Libtool team:
429 * New features:
431 - New libtoolize option --no-warn, for users that want to continue to
432 use old libtool style without being nagged.
433 - Options --debug, --no-warn, --quiet and --verbose can be passed to
434 libtoolize through the environment variable LIBTOOLIZE_OPTIONS, for
435 cleaner interaction between the user and libtoolize when called by
438 * Bug fixes:
440 - The documentation for lt_dlopenadvise showed the wrong type for
441 the lt_dladvise parameter.
442 - The public declarations for lt_dlhandle and lt_dladvise are now
443 incomplete struct types rather than void*, which means that nearly
444 all casting is eliminated allowing the compiler to provide more
445 type checking.
446 - libtoolize no longer reports up-to-date files that it would have
447 copied, unless --force is passed.
448 - No longer reports that lt~obsolete.m4 needs to be added to aclocal.m4
449 when it is already there.
450 - When 'aclocal' copied the libtool macros directly into 'aclocal.m4'
451 (i.e. AC_CONFIG_MACRO_DIR is not being used), libtoolize no longer
452 reports that all macros need to be added to 'aclocal.m4', and
453 diagnoses only the macro files that are missing or not up-to-date.
454 - libtoolize now advises use of AC_CONFIG_MACRO_DIR to keep matching
455 libtool macros in-tree where appropriate.
456 - libtoolize now advises use of 'ACLOCAL_AMFLAGS = -I m4' (or
457 equivalent) where appropriate, and errors out when ACLOCAL_AMFLAGS
458 names a different directory to AC_CONFIG_MACRO_DIR.
460 New in 2.2.2: 2008-04-01: CVS version 2.2.1a, Libtool team:
462 * New features:
464 - In compile mode, compiler output occurs in the user locale. This
465 feature has been present in 1.5.26 but not in 2.2.
467 * Changes in supported systems or compilers:
469 - Initial shared library support for AmigaOS4 on powerpc.
471 * Bug fixes:
473 - Fix 2.2 regression in libltdl that causes memory corruption upon
474 repeated 'lt_dlinit(); lt_dlexit()'.
475 - Fix 2.2 regression in libltdl that skipped the dlopen loader if
476 the system also supports other loaders (e.g., Cygwin, HP-UX).
477 - Fix 2.2 regression in that 'libtool --mode=execute CMD ARGS' does not
478 transform ARGS that do not look like shell or C wrappers of libtool
480 - Fix 2.2 regression that kept cross-compiling to w32 from working.
481 - Several testsuite issues have been fixed, thanks to user feedback.
483 New in 2.2: 2008-03-01; CVS version 2.1c, Libtool team:
485 * Bug fixes:
487 - argz.c, lt__dirent.c and lt__strl.c are correctly distributed with
488 parent projects using nonrecursive libltdl.
489 - libtoolize no longer tries to install libtool files when libltdl is
490 used in a non-autoconf parent package.
491 - Don't add the CXX tag to libtool when there is no C++ compiler, even
492 if AC_PROG_CXX sets a default g++ compiler where no such compiler
493 actually exists.
494 - make distcheck DISTCHECK_CONFIGURE_FLAGS=--disable-ltdl-install
495 works again.
497 New in 2.1b: 2008-02-01; CVS version 2.1a, Libtool team:
499 * Important incompatible changes and obsoleted features:
501 - Removed deprecated APIs from libltdl: lt_dlcaller_register,
502 lt_dlhandle_next, lt_dlhandle_find, lt_dlforeach, lt_dlmutex_register,
503 lt_dlmutex_lock, lt_dlmutex_unlock, lt_dlmutex_seterror,
504 lt_dlmutex_geterror, lt_dlmalloc, lt_dlrealloc, lt_dlfree.
505 - The Libtool and libltdl macros and the testsuite now assume a C89
506 environment, consequently do not test for headers such as string.h,
507 strings.h, memory.h any more.
508 - Fix regression in libltdl symbol exports on Cygwin. Side effect:
509 LT_GLOBAL_DATA and LT_SCOPE are now explicitly defined as
510 declspec(dllexport), bypassing auto-export logic on Cygwin.
511 This tracks existing behavior on MinGW.
512 - The libtool script has been optimized a bit for more modern shells.
513 This breaks use of the stdin file descriptor in libtool, and can
514 break if a different shell is used to execute the libtool script
515 than the one it was configured for.
516 - The macros AC_ENABLE_SHARED, AC_DISABLE_SHARED, AC_ENABLE_STATIC, and
517 AC_DISABLE_STATIC have been un-deprecated after deprecation in
519 - The macro LT_WITH_LTDL has been renamed to LTDL_INIT.
520 - Fixed a branch-1-5/HEAD regression to only link uninstalled libraries
521 statically with '-static'. In order to compensate for this, there
522 is a new link flag '-static-libtool-libs' to provide the previous
523 '-static' semantics.
525 * New features:
527 - Fix installation of libltdl so that it does not need Autoconf and
528 Automake installed, in order to be usable in another package. This
529 lifts the restrictions introduced in 1.9b.
530 - Default convenience or installable libltdl builds can optionally
531 be declared using new 'convenience' or 'installable' options to the
532 LTDL_INIT macro (as an alternative to individual LTDL_CONVENIENCE
533 or LTDL_INSTALLABLE invocations).
534 - New configure-time options to allow libltdl parent project builder
535 to choose between installed and shipped libltdl, when invoking
536 LTDL_INIT: --with-included-ltdl, --with-ltdl-include,
538 - New LT_CONFIG_LTDL_DIR macro to specify a different directory name
539 for a convenience libltdl.
540 - libtoolize has been completely overhauled.
541 - 'libtoolize --install' now also installs 'install-sh'.
542 - New libtoolize options: --non-recursive, --recursive, --subproject.
543 These options control the way libltdl is installed into a package by
544 libtoolize. The new recursive and non-recursive build modes for
545 libltdl don't require a subconfigure any more.
546 The Libtool package itself builds libltdl nonrecursively.
547 - The 'nonrecursive', 'recursive' and 'subproject' libltdl build
548 modes are given as LTDL_INIT options.
549 - New make variable LTDLDEPS for use in output_DEPENDENCIES.
550 - New multi-module-loader safe libltdl handle iteration APIs:
551 lt_dlhandle_iterate, lt_dlhandle_fetch, lt_dlhandle_map.
552 - New lt_dlinterface_register to maintain separation of concerns
553 between modules loaded by different libraries.
554 - New lt_dlopenadvise takes a new lt_dladvise type argument, which
555 lets the caller request local or global symbol visibility from the
556 module loader with lt_dladvise_local and lt_dladvise_global
557 respectively. If neither is given, or if lt_dlopen (or lt_dlopenext)
558 are called, then the system default module symbol visibility is used.
559 - The new lt_dladvise_init/lt_dladvise_destroy based APIs also allow
560 caller requests for a filename extension search with lt_dladvise_ext,
561 and for marking a module unloadable with lt_dladvise_resident.
562 - Allow shell special characters like '$' in source file names, but
563 not in object names, to enhance GCJ support.
564 - An entire new Autotest-based testsuite in addition to the old one.
565 Both testsuites have been made more useful for testing
566 cross-compilers. The new testsuite exposes many more issues, but
567 may also be a little rocky on exotic systems.
568 - In 1.9b, a new variable inherited_linker_flags has been added to the
569 libtool library files. This variable takes flags that should be
570 used by dependent libraries and programs, but that do not fit into
571 'dependency_libs' for both clarity and backward-compatibility.
573 * Changes in supported systems or compilers:
575 - Removed bitrotted support for xlc on Mac OS X.
576 - Detection of compiler wrappers distcc/ccache and $host_alias prefix.
577 - Basic support for PIE (position-independent executables).
578 - Support for DragonFly BSD, improved support for FreeBSD.
579 - Improved support for GNU/kFreeBSD and GNU/NetBSD.
580 - Support for Interix 3 (Windows SFU) and newer versions.
581 - Support for AIX 6.1.
582 - Improved support for UnixWare.
583 - Initial support for RDOS.
584 - Initial Support for FC (modern Fortran).
585 - Support for Portland Group compiler, the Sun compiler suite on GNU/Linux,
586 and initial support for the IBM compiler suite on GNU/Linux/ppc.
587 - Support for linux-dietlibc ('diet' as well as 'diet-dyn', separately).
588 - Building libltdl with a C++ compiler has been undusted.
589 - On (AIX?,) HP-UX, and OpenBSD, hardcoding has been changed to prefer
590 rpath over absolute dependent library names. This fixes DESTDIR
591 installs, among others, on the non-HP-UX/PA systems.
592 - Use of C++ templates together with shared libraries has been
593 improved on some systems and with some compilers, but is still
594 ongoing work. Feedback is desirable here.
596 * Bug fixes:
598 - Fix libltdl on static platforms.
599 - Search paths with GCC on multilib systems like x86_64 have been fixed.
600 - Fixed a regression that prevented use of libltdl without autotools.
601 - Fix error with -version-info on systems with version_type=none, such
602 as BeOS.
603 - Fix symbol exporting for cases where command line length limits are
605 - Improve linking with C++ libraries on Solaris with Sun compiler.
606 - Fix installation of libraries that are required by installation
607 commands such as 'ln' or 'rm'.
608 - More robust parsing of mangled '.la' files inside libltdl, fixing a
609 possible overrun and a crash due to memory exhaustion.
610 - Fix compile command line for gcj on MinGW.
611 - Some configure variables have been renamed to fix caching:
612 lt_prog_compiler_pic_works to lt_cv_prog_compiler_pic_works
613 lt_prog_compiler_static_works to lt_cv_prog_compiler_static_works.
614 - Fix 1.9b regression: lt_dlopen(NULL) works on AIX again.
615 - Loads of smaller bug fixes.
618 New in 1.9f: 2004-10-23; CVS version 1.9e, Libtool team:
619 * Fix a regression in 1.9d, where ECHO was always set to 'echo' and the
620 backslash quoting tests were never run.
621 * Fix a regression in 1.9d, where progpath was used for --no-reexec before it
622 was set.
623 * Fix a regression in 1.9d, which required an installed automake to build the
624 bootstrapped tarball.
625 * Fix hanging bug on MinGW.
627 New in 1.9d: 2004-10-03; CVS version 1.9c, Libtool team:
628 * If non-pic objects were not compiled, and libtool is called in link mode,
629 libtool no longer silently creates an empty archive, but rather falls
630 back to pic objects.
631 * When compiling C glue code with $LTCC, libtool now saves the setting of
632 $compiler_flags from the C tag, and passes those flags to $LTCC.
633 * libtool no longer dies when concurrently creating directories with
634 'make -j' on multi-processor hosts.
635 * Return type, and name parameter of lt_dlloader_remove are no longer
637 * Name parameter of lt_dlloader_find is no longer 'const'.
638 * The API for the slist ADT has been updated: slist_new has been replaced
639 by slist_box; slist_unbox and slist_sort are new; the footprint of
640 slist_remove and slist_fnid have changed; SListCallback and SListCompare
641 types have been exchanged. See libltdl/slist.c for documentation.
642 * libltdl is C89 compatible again. lt_dlsymbol type removed, and lt_dlsymlist
643 structure changed to avoid using C99 flexible arrays.
644 * Support self dlopening for executables on cygwin and mingw.
645 * Improved support for linux-gnu/ia64.
646 * Initial support for s390x-ibm-tpf.
647 * Fixed some memory leaks in libltdl.
648 * Improved support for OpenBSD (use rpath instead of hardcoding absolute
649 file names).
651 New in 1.9b: 2004-08-29; CVS version 1.5a, Libtool team:
652 * The /^_?LT_[A-Z_]+$/ namespace is now reserved for Libtool's own macros.
653 If you have any shell variables in this namespace they will need to be
654 renamed. If you have any macros in this namespace please rename them to
655 prevent any possible future clash with libtool supplied macros.
656 * New LT_PREREQ macro for specifying minimum libtool requirement.
657 * New LT_INIT interface replaces AC_PROG_LIBTOOL, AC_ENABLE_SHARED,
658 AC_DISABLE_SHARED, AC_ENABLE_STATIC, AC_DISABLE_STATIC,
659 AC_ENABLE_FAST_INSTALL, AC_DISABLE_FAST_INSTALL, AC_LIBTOOL_DLOPEN,
660 AC_LIBTOOL_WIN32_DLL and AC_LIBTOOL_PIC_MODE. Use autoupdate to modernise
661 your configure.ac files after installing this release.
662 * New LT_LANG interface to enable libtool support for a specific language.
663 * Language support is now only included if your configure.ac enables it,
664 either through a call to AC_PROG_CXX etc. or LT_LANG.
665 * The libtool script will complain if it was built from mismatched ltmain.sh
666 and libtool m4 macro versions.
667 * Like automake, libtoolize no longer installs config.guess and config.sub by
668 default. Use new --install option to get the old behaviour.
669 * libtoolize no longer supports the --ltdl-tar option.
670 * libtool script is now created by config.status. Instead of interrogating
671 './libtool' from configure.ac after calling AC_PROG_LIBTOOL, use the
672 variable names directly.
673 * libltdl is no longer a self-contained package, and shares configury with
674 the top level directory now.
675 * Shared objects (.lo) are no longer created when '-static' is passed in
676 compile mode.
677 * New compile mode option '-shared' prevents creation of static objects (.o).
678 * New link mode option '-shared' creates only shared libraries at link time.
679 * If you configure libtool with --disable-shared (or if libtool does not
680 support shared libraries on your platform) trying to build a library using
681 '-shared' is a fatal error.
682 * New link mode option '-weak' tells libtool when not to propagate dependency
683 libraries from dlpreopened modules.
684 * libtoolize installs libtool.m4, (ltdl.m4 if used,) and various supporting
685 m4 definitions to AC_CONFIG_MACRO_DIR.
686 * Mode inferrence removed, shorthand for choosing modes added.
687 * Specifying -allow-undefined is now an error.
688 * Speed up max_cmd_len check.
689 * libltdl can now preopen modules from within a library, and libtool will
690 accept -dlpreopen options when linking either a shared library or a
691 convenience library.
692 * New function in libltdl: lt_dlhandle_find provides access to module handles
693 by module name.
694 * New function in libltdl: lt_dlpreload_open opens all preloaded modules.
695 * libltdl no longer loads shared libraries with global symbol resolution,
696 this caused problems when the symbols were intended to be overriden further
697 up the stack; it is also not recommended practice.
698 * New function in libltdl: lt_dlhandle_first, primes handle iterations (using
699 lt_dlhandle_next) to filter by module interface.
700 * libltdl no longer tries to support multi-threaded programming with
701 lt_dlmutex_register(), which was unusable with POSIX threads anyway.
702 The symbols are deprecated but exported for backwards compatibility.
703 * libltdl no longer uses lt_dlmalloc, lt_dlrealloc and lt_dlfree. The symbols
704 are still exported for backwards compatibility.
705 * The lt_dlinfo struct has a new module field that can be used by dlloaders.
706 * libltdl no longer supports pre-c89 compilers. Some of the pre89 portability
707 functions had compile time bugs in them anyway, so you guys can't have been
708 using it :-)
709 * make install now deletes preexisting $prefix/share/libtool before installing
710 latest files.
711 * Extracting symbols from an import library on cygwin and win32 now works.
712 * Initial support for amigaos-ppc.
713 * Improved support for OpenBSD.
714 * Support for Intel C++ version 8.0.
715 * New support for IBM's xlc and xlc++ on Mac OS X.
716 * Finished support for QNX RTOS.
717 * Bug fixes.
719 New in 1.5.8: 2004-08-07; CVS version 1.5.7a, Libtool team:
720 * Support for Intel C++ version 8.0.
721 * Improved support for OpenBSD.
722 * Support for xlc on Mac OS X.
723 * Better support for zsh as /bin/sh.
724 * Much faster check for command line length on all BSD systems.
725 * Better Mac OS X/darwin support.
726 * Bug Fixes.
728 New in 1.5.6: 2004-04-11; CVS version 1.5.5a, Libtool team:
729 * Installs libltdl files properly in $prefix/share/libtool/libltdl. 1.5.4
730 did not install them at all.
731 * libltdl correctly guesses the extension for loadable modules again.
733 New in 1.5.4: 2004-04-03; CVS version 1.5.3a, Libtool team:
734 * Bug fixes.
736 New in 1.5.2: 2004-01-25; CVS version 1.5.0a, Libtool team:
737 * lt_dlrealloc is an official part of the libltdl API.
738 * --tag, --silent and --debug options are preserved and reused when libtool
739 calls itself for relinking etc.
740 * '-pthread' and similar options are honoured when linking shared libraries.
741 * -no-suppress in compile mode shows compiler output for both PIC and non-PIC
742 object compilation.
743 * New link mode option '-precious-files-regex' to prevent accidental removal
744 of files you want to keep, such as test coverage data, from the temporary
745 output directory.
746 * Directories specified in /etc/ld.so.conf are no longer hardcoded on GNU/Linux.
747 * Recognises the 'R' symbol type on Solaris so read-only symbols can be
749 * Bug fixes.
751 New in 1.5.1: 2003-??-??; CVS version 1.5.0a, Libtool team:
752 * lt_dlrealloc is an official part of the libltdl API.
753 * Bug fixes.
755 New in 1.5: 2003-04-14; CVS version 1.4e, Libtool team:
756 * First stable release of multi-language architecture.
757 * libtool and libltdl support for Mac OS/X.
758 * libltdl will now use cygwins dlopen API instead of always forcing
760 * Support auto-import patch to binutils on cygwin for much improved dll
762 * Bug fixes.
764 New in 1.4.3: 2002-10-13; CVS version 1.4.2a, Robert Boehne:
765 * The libltdl subdirectory now bootstraps correctly with Automake 1.5.
766 * srcdir != builddir builds with Automake 1.5 work correctly.
767 * Support for mips-compaq-nonstopux.
768 * New command line argument, --preserve-dup-deps prevents removal of
769 duplicate dependent libraries.
771 New in 1.4d: 2002-01-07; CVS version 1.4c, Libtool team:
772 * Help strings display correctly again.
773 * Better error messages when library linking fails.
774 * Better error messages from libltdl when loading fails.
775 * Better search path management in libltdl with 'lt_dlinsertsearchdir' call.
776 * Support /lib/w32api in recent cygwin releases.
777 * Support cross compilation to mingw.
778 * Support for .rc files (Windows resource compiler).
779 * Improved handling of mingw gcc.
780 * Improved handling of $PATH with entries containing spaces.
781 * Improved support for linking with gcc on aix4* and aix5*.
782 * Improved support for GCC 3.0.
783 * Initial support for QNX RTOS, UnixWare 7 and OpenUNIX 8.
784 * Bug fixes to the OpenBSD port.
785 * Bug fixes.
787 New in 1.4.2: 2001-09-11; CVS version 1.4.1a, Gary V. Vaughan:
788 * libltdl now builds on solaris again
789 * diagnose and warn about not-quite-working combinations of gcc and
790 ld on solaris.
791 * Improved OpenBSD support.
792 * Improved cygwin support.
793 * Bugfixes.
795 New in 1.4.1: 2001-09-03; CVS version 1.4.0a, Libtool team:
796 * Better error messages from libltdl when loading fails.
797 * Don't leave here-doc files behind.
798 * Improved support for OpenBSD.
799 * Libtool will build with autoconf-2.50 and higher.
800 * Plug memory management bugs in libltdl.
801 * Prefer shl_load to dlopen for better operation on HP-UX.
803 New in 1.4b: 2001-07-09; CVS version 1.4a, Libtool team:
804 * Now bootstraps with autoconf-2.50 and automake-1.4-p4.
805 * Always try to build at least a static lib, even if both static and
806 shared libs were disabled.
807 * Full support for C++ compiler.
808 * Support for GNU gcj compiler.
809 * libltdl can now load all modules in a given path according to user
810 supplied criteria with 'lt_dlforeachfile' call.
811 * Improved support for AIX ia64, djgpp, HPUX, hurd, OpenBSD, sco3.2*.
812 * Internal mutex handling no longer has namespace clashes on NCR MP-RAS.
813 * New pdemo and tagdemo tests.
814 * Bug fixes.
816 New in 1.4: 2001-04-25; CVS version 1.3e, Libtool team:
817 * Support for aix5*.
818 * Bugfixes.
820 New in 1.3d: 2001-04-02; CVS version 1.3c, Libtool team:
821 * ltconfig is no more. Generation of libtool happens directly from
822 the configure file.
823 * Multithread safe with lt_dlmutex_register callback registration.
824 * New -no-install flag to avoid the use of executable wrapper scripts.
825 * New --with-pic, -prefer-pic and -prefer-non-pic flags to control
826 the generation of PIC/non-PIC code.
827 * Support for hardcoding run-time paths (-R) into libraries.
828 * Support -dlopen and -dlpreopen for libraries.
829 * Libtool now allows you to link shared libraries against static code.
830 * New functions in libltdl:
831 lt_dlgetinfo, lt_dlhandle_next and lt_dlforeach provide access to module
832 specific data in handles.
833 lt_dlcaller_register, lt_dlcaller_set_data and lt_dlcaller_get_data provide
834 management for user storage of per module data.
835 lt_dlloader_next, lt_dlloader_name, lt_dlloader_find, lt_dlloader_add and
836 lt_dlloader_remove can be used for adding new types of module loaders.
837 lt_dladderror, lt_dlseterror integrate user module loaders with lt_dlerror.
838 * "-Xcompiler" and "-Wc," does now work in compile mode, too.
839 * Support recent dlltool formats.
840 * Start of support code for cross-compiling to win32.
841 * libltdl can now be built as a dll with win32.
842 * m4 macros needed to configure libltdl split out into libltdl/ltdl.m4.
843 * New port to NEWS-OS Release 6.
844 * Improved support for darwin (rhapsody), mingw32, NetBSD, Compaq Tru64 V5.0
845 and Digital Unix V4.*.
846 * Initial support for ia64 linux.
847 * Initial support for a.out freebsd shared libs.
848 * Initial support for Paul Sokolovsky's pw32 POSIX over win32 layer.
849 * Many bugfixes (especially in libltdl)
851 New in 1.3b: 1999-07-02; CVS version 1.3a, Libtool team:
852 * Complete inter-library dependencies support. It's now possible
853 to link libtool libraries against other libtool libraries.
854 * Libtool is able to find already-installed libtool libraries,
855 even if they were moved out of their installation directory.
856 * New "-Wc,flag" and "-Xcompiler flag" flags to pass flags
857 directly to the compiler
858 * New "-Wl,flag" and "-Xlinker flag" flags to pass flags
859 directly to the linker
860 * New "-no-fast-install" flag to selectively disable fast-install mode.
861 * Support for installing stripped libraries using GNU strip (install -s).
862 Automake >= 1.5 will install stripped libraries with "make install-strip".
863 * Allow linking shared libraries against static ones
864 on FreeBSD, GNU/Linux, GNU Hurd and Solaris
865 * Support for linking DLLs on Win32
866 * New 'clean' mode to delete uninstalled files.
867 * New demos and tests
868 * Various bugfixes
870 New in 1.3.5: 2000-05-27, CVS version 1.3.4a, Libtool team:
871 * Support for mac OS X (rhapsody).
872 * Support for *-sequent-sysv4.
873 * Support for Cygwin-1.1.0.
874 * Support recent dlltool formats.
875 * Bugfixes.
877 New in 1.3.4: 1999-12-08, CVS version 1.3.3a, Libtool team:
878 * Support for Compaq Tru64 V5.0.
879 * Improved support for Digital Unix V4.*.
880 * Improved support for NetBSD, FreeBSD and Unixware.
881 * Many fine bugfixes.
883 New in 1.3.3: 1999-07-02, CVS version 1.3.2a, Libtool team:
884 * New '-dlpreopen force' flag to ensure that
885 lt_preloaded_symbols is always defined.
886 * Work around self-dlclose bug in FreeBSD 3.1.
887 * Expand convenience libraries when creating reloadable objects.
888 * Do not forget to import -L flags of convenience libraries.
889 * Do not pass -whole-archive or equivalent to symbol extractor.
890 * Create directory to expand convenience libraries only when needed.
891 * Improved support for Cygwin, DJGPP and NetBSD
892 * Various bugfixes
894 New in 1.3.2: 1999-05-26, CVS version 1.3.1a, Libtool team:
895 * Avoid circular links of objects and libraries.
896 * Look for dlerror when dlopen was found in -ldl (typo).
897 * Disable shared libraries with broken GNU ld on Solaris.
899 New in 1.3.1: 1999-05-21, CVS version 1.3.0a, Libtool team:
900 * Documentation improvements; recommend automake users to insert libtool.m4
901 in acinclude.m4
902 * AC_LIBLTDL_CONVENIENCE and AC_LIBLTDL_INSTALLABLE now set INCLTDL.
903 * New port to NEC UX/4800.
904 * cygwin-b20.1 passes all tests.
905 * Slightly improved BeOS support.
906 * Many AIX 4.3.2 test failures have gone.
907 * Pass unknown -L arguments through to the linker (for -LANG:* support).
908 * Close a security hole with mode 777 directory during libltdl installation.
909 * Fixed the infamous 'ifelse' bug in libtool.m4
911 New in 1.3: 1999-04-29, Libtool team:
912 * This is just a summary of the changes since 1.2.
913 See the news of intermediate alpha releases below for details.
914 * Support for convenience archives.
915 * New maintainers. Anonymous CVS and home page at gnu.org.
916 * Portable dlopening interface with libltdl, new -module flag.
917 * Correctly link installed libtool libraries into programs and other
918 libtool libraries. Linking of uninstalled libtool libraries into
919 libraries is under development for 1.4.
920 * Do not drop library dependencies on platforms that allow them.
921 * Linking with uninstalled libraries no longer picks installed ones by
923 * Use libraries from the build tree when running uninstalled
924 executables (may require double linking).
925 * Allow developers to optimize for build-tree executions.
926 * Support -export-symbols-regex for controlled symbol exporting.
927 * Support -R to hardcode directories in library search paths.
928 * New ports, demos and tests. Lots of improvements and bug fixes.
930 New in CVS version 1.2g, Libtool team:
931 * AM_PROG_LIBTOOL is smaller and faster
932 * AC_LIBTL_L_WIN32_DLL is required in configure.in for libtool to
933 attempt to build dlls on win32 hosts
934 * Shared libraries on AmigaOS up to version 4 are now disabled
935 since they don't meet libtool's requirements for shared libraries
936 * -L supports now relative directories
937 * Libltdl has a new license: LGPL with a special exception
938 * Libltdl can be used as stand-alone package
939 * dlopen support for BeOS
940 * Partial support for Motorola System V 4
941 * Improved support for AIX, BeOS, Cygwin, DJGPP, DU, IRIX and HP/UX
942 * Documentation updates
943 * New tests
944 * Bugfixes
946 New in 1.2f: 1999-03-15; CVS version 1.2e, Libtool team:
947 * libtool will correctly link uninstalled libraries into programs
948 and prefer uninstalled libraries to installed ones
949 * Library paths that are in the system default run-time search path
950 are no longer hardcoded into executables.
951 * New fast installation mode, which links the final executable
952 in order to avoid relinking during installation.
953 Programs in the build-tree are relinked when executed.
954 * New AC_DISABLE_FAST_INSTALL macro to set the default for
955 the fast-install mode to disabled
956 * New -export-symbols-regex flag, to export symbols selectively by
957 a regular expression
958 * Support -R for specifying run-time path of programs and library dependencies
959 * New -avoid-version option to avoid versioning for libraries
960 * libtool module names no longer need to have a "lib" prefix
961 (requires automake 1.4).
962 * New -thread-safe flag, to build thread-safe libraries
963 * Major improvements in libltdl: API documentation, installable version,
964 support for module search paths, support for lt_dlopen(0),
965 can be embedded into packages as a tar file (libltdl.tar.gz),
966 dynamic buffer allocation and buffer overflow checks,
967 new macro LTDL_SET_PRELOADED_SYMBOLS() which must be used in the
968 main program, dynamic memory allocation functions are user-defineable
969 * New AC_LIBLTDL_CONVENIENCE and AC_LIBLTDL_INSTALLABLE macros, to select
970 convenience and/or installable versions of libltdl.
971 * libltdl is now built and installed unless --disable-ltdl-install
972 * New "-dlopen self" flag for dlopening the executable itself
973 * New AC_LIBTOOL_DLOPEN macro to check for dlopen support,
974 required if you use -dlopen or -dlpreopen
975 * If libtool could not satisfy all dependencies of a module
976 it will only build a static version of it
977 * dld_preloaded_symbols was renamed to lt_preloaded_symbols
978 * Support for BeOS
979 * Improved support for FreeBSD, AIX, IRIX, OSF, SysV 4.3, HP/UX, DJGPP
980 BSD/OS 4.x and NetBSD
981 * In order for libtool to attempt to link a shared library (dll) on win32
982 platforms, you must pass the -no-undefined flag to libtool in link mode.
983 * The path to GNU ld now works on cygwin-b18 to cygwin-b20.2 at least.
984 * Support for IRIX library versioning.
985 * New demos and tests
986 * Various bugfixes
988 New in 1.2d: 1998-12-16; CVS version 1.2c, Libtool team:
989 * libtool will correctly link already-installed libraries into programs.
990 * New -module flag, to create loadable modules.
991 * New libltdl, a small library for portable dlopening of modules.
992 It is still undocumented, but you can already find some examples in:
993 * New mdemo directory, with tests of -module and dlopening examples.
994 Be aware that libltdl is only known to work on a few platforms such as
995 GNU/Linux and Solaris2. Some mdemo tests are known to FAIL on several
996 other platforms; please ignore these failures by now (or work to fix
997 them :-).
998 * Inter-library dependencies patch finally integrated, but there's
999 still much porting to do. See PORTING for details (some plans for the
1000 future in mail/deplibs in the CVS tree).
1001 * New option -export-symbols to control symbol exporting when possible.
1002 * Fixed -export-dynamic problem with C++ programs in egcs 1.1.
1003 * New dlpreopen structure.
1004 * libtool now supports '-c -o' and subdirectories in sources and
1005 target object names even in platforms whose compilers do not support
1006 this. In this case, file locking occurs to avoid problems with
1007 parallel builds.
1008 * New 'echo' variant that should fix most problems with long command
1009 lines and broken printf programs.
1010 * Support for DG/UX, UnixWare 7.x and FreeBSD 3.0, and improved
1011 support for Microsoft Windows
1012 * Various bugfixes
1013 * We now have anonymous CVS access to GNU libtool. CVSROOT is
1014 :pserver:firstname.lastname@example.org:/gd/gnu/anoncvsroot. The password
1015 is empty. The directory is libtool. Check our home-page at
1016 http://www.gnu.org/software/libtool/libtool.html for details.
1017 * Alexandre Oliva, Thomas Tanner and Gary V. Vaughan have taken over
1018 the maintenance of libtool.
1019 * Arguments to ltconfig have been changed to allow creation of a
1020 libtool C program, totally unusable as of this release.
1022 New in 1.2b - 1998-07-01, Gordon Matzigkeit:
1023 * Libtool needs a new maintainer, since Gordon Matzigkeit has quit.
1024 If you think you can do the job, send mail to email@example.com.
1025 * Bug fixes.
1026 * Support for libtool convenience archives.
1028 New in 1.2a - 1998-04-19, Gordon Matzigkeit:
1029 * Bug fixes.
1030 * ltconfig accepts an '--output' option to specify the name of the
1031 generated libtool.
1032 * New '--debug' flag to turn on shell script tracing for libtool,
1033 libtoolize, and ltconfig.
1034 * Added 'libtool --config' to print out all configuration variables.
1035 * Support for *-*-hpux11*.
1037 New in 1.2 - 1998-03-20, Gordon Matzigkeit:
1038 * Minor bug fixes to provide a stable public release.
1039 * Libtool no longer cseses Solaris printf to barf due to silly
1040 2110-byte static buffers.
1042 New in 1.1 - 1998-03-08, Gordon Matzigkeit:
1043 * Bug fixes.
1044 * http://www.profitpress.com/libtool/ is libtool's homepage.
1045 * 'AM_PROG_LIBTOOL' supports turning shared or static libraries off
1046 with the '--enable-shared=PKGS' and '--enable-static=PKGS' configure
1047 flags. See (libtool)AM_PROG_LIBTOOL.
1048 * Use the 'AM_DISABLE_SHARED' or 'AM_DISABLE_STATIC' macros if you
1049 wish to modify the default behaviour of 'AM_PROG_LIBTOOL' for your
1051 * New rules for 'AM_PROG_LD' to use gcc's '-print-prog-name' flag in
1052 order to find ld, if possible.
1053 * Suppress duplicate compiler output during 'compile' mode.
1054 * Deleted 'dlname' mode. Dlopen applications should only use the
1055 runtime search method described in (libtool)Finding the dlname.
1056 * Experimental support for dynamically loaded modules, even on
1057 static-only platforms, via new '-dlopen' and '-dlpreopen' link
1059 * 'compile' mode honours the '-static' flag to prevent libtool
1060 from building PIC objects.
1061 * New 'execute' mode to support debugging uninstalled libtool
1062 libraries and executables.
1063 * '-allow-undefined' is now the default. You can use '-no-undefined'
1064 to declare that a shared library is completely self-contained.
1065 * Inter-library dependencies are automatically handled when linking
1066 against an uninstalled '.la' file.
1067 * New '-all-static' flag to prevent any dynamic linking. The regular
1068 '-static' flag now just prevents dynamic linking of libtool libraries.
1069 * New '-release' flag to encode release numbers into libtool
1070 libraries. This breaks binary compatibility, but is useful for
1071 libraries whose interfaces change very frequently. See
1073 * The '-rpath' flag can be used to hardcode absolute directories when
1074 linking executables using libtool.
1075 * New robust quoting code to handle any metacharacters passed in
1076 arguments to libtool commands.
1077 * Full support for broken collect2 on AIX 3. Shared libraries
1078 can now be built with all working versions of GCC on AIX.
1079 * Shell script speed optimizations for old and buggy /bin/sh systems,
1080 such as HP-UX 9 and SunOS 4.1.4.
1081 * Maybe use '_libs' as a temporary libtool directory instead of '.libs'
1082 in order to cope with MS-DOS filenames.
1083 * Portability fixes for Windows NT.
1084 * Refuse to create libtool libraries that don't begin with 'lib'.
1085 This allows us to correctly handle OSes that don't have the 'lib'
1086 prefix by default, such as OS/2.
1087 * Support for *-*-amigaos*, *-*-os2*, *-*-sysv4.2uw2*, and *-*-uts4*.
1089 New in 1.0 - 1997-07-08, Gordon Matzigkeit:
1090 * Bug fixes.
1091 * Better configuration test to find the system linker. The old test
1092 was failing because people frequently install GNU ld, but don't
1093 necessarily configure GCC to use it.
1094 * Automake support for Libtool now uses the LTLIBRARIES primary. See
1095 the Automake documentation for more information.
1096 * Added new '--disable-static' flag to disable building static
1097 libraries on platforms that have shared libs.
1098 * New '-allow-undefined' link flag to build shared libs that contain
1099 references to unresolved symbols.
1100 * Removed all support for creating static-only libraries.
1101 * Basic support for dynamically loaded modules: new '-export-dynamic'
1102 linking flag and corresponding 'dlname' mode.
1103 * New '--features' flag to display configured libtool attributes.
1104 * Added support for installing libtool objects, both in absolute and
1105 relative directories.
1106 * Support *-*-linux-gnu* as an alias for *-*-linux*.
1107 * Support for *-*-openbsd* and *-*-freebsd3*.
1109 New in 0.9 - 1997-02-03, Gordon Matzigkeit:
1110 * Bug fixes.
1111 * The libtool demo now uses the libm cos(3) function, to demonstrate
1112 inter-library dependencies.
1113 * The PLATFORMS file has been moved to doc/platforms.texi.
1115 New in 0.8 - 1997-01-26, Gordon Matzigkeit:
1116 * Bug fixes, and more documentation.
1117 * Basic support for other language compilers (C++, Fortran, and
1118 preprocessed assembler).
1119 * Libtool is now more persistent when linking with the '-static'
1120 flag fails.
1121 * New test for hardcoding system linkers, to verify that libtool
1122 neither creates incorrect binaries, nor takes unnecessary
1123 precautions while linking against uninstalled shared libraries.
1124 * For clarity, the demo subdirectory no longer uses ansi2knr, and has
1125 been rewritten to avoid ANSI-only constructs.
1126 * Support for *-*-irix5, *-*-irix6*, and *-*-sco3.2v5*.
1128 New in 0.7 - 1996-12-08, Gordon Matzigkeit:
1129 * Total rewrite of libtool, along with a new model for library building.
1130 * Completely rewritten documentation for the new paradigm.
1131 * Sane handling of broken system linkers, such as the ones on AIX
1132 and HP-UX.
1133 * configure mode is now a separate program, 'ltconfig'
1134 * The libinfo helper script has been incorporated into the main
1135 libtool program.
1136 * Automatic mode guessing, based on the command line.
1137 * Full support for Automake 1.2 (including ansi2knr features).
1138 * Support to create reloadable objects using link mode.
1139 * Support for new '-static' linking flag.
1140 * Support for stripping libraries during installation.
1141 * Library version information is now passed on the command line, not
1142 through a version file.
1144 Version 0.6 was never released.
1146 New in 0.5:
1147 * Disabled install-progs until next version, when it will be correctly
1149 * Clearer library versioning documentation. See (libtool)Versioning.
1150 * Renamed gm_PROG_LIBTOOL to AM_PROG_LIBTOOL
1151 * Libtool now creates pseudo-objects named foo.lo and pseudo-archives named
1152 libfoo.la instead of foo.o and libfoo.a. See the documentation.
1153 * libtool compile doesn't interfere with user CFLAGS if they don't
1154 conflict with the current objtype. From Karl Berry.
1155 * Created new libinfo helper script.
1156 * libversion.in files are obsolete -- libtool uses libinfo to read the
1157 new LIBINFO files.
1158 * Libtool is better at finding its config file and helper scripts.
1159 * Support for *-*-gnu*
1161 New in 0.4:
1162 * Bug fixes and new regression tests
1163 * On unsupported configurations, 'libtool configure' demotes OBJTYPES to
1164 'standard' instead of aborting
1165 * Added new object type, 't', for tcov(1) support
1166 * Support for *-*-aix3*, *-*-aix4*, *-*-hpux10*, *-*-osf3*, and *-*-solaris2*
1168 New in 0.3:
1169 * Bug fixes and new regression tests
1170 * Added new uninstall-libs mode
1171 * Added a host argument to configure mode
1172 * Fixed debugging/hyper-optimizing flags conflict (from Karl Berry)
1173 * Support for --no-whole-archive when needed by GNU ld (from Ulrich Drepper)
1174 * Implementation of --enable-linktype, --enable-profile, --enable-shared,
1175 --enable-static in gm_PROG_LIBTOOL macro
1176 * New 'libtoolize' program (modeled after GNU gettext's 'gettextize') to help
1177 conversion to libtool
1178 * New ABOUT-LIBS document for inclusion with libtool-supported packages
1180 New in 0.2:
1181 * Support for *-*-linux
1182 * Better checking for GNU ld
1183 * Reimplemented the config file so that it corresponds more closely to the
1184 variables listed in (libtool)Porting Libtool.
1185 * Reimplemented the shared library version scheme. See (libtool)Versioning.
1186 * Replaced '--config-file' and '--version-file' options with '--confdir'
1187 * Added new install-libs and install-progs modes
1189 New in 0.1:
1190 * First release of libtool
1191 * Support for: *-*-freebsd*, *-*-netbsd*, *-*-sunos4*, *-*-ultrix4*
1193 Copyright (C) 1996, 1998-2015 Free Software Foundation, Inc.
1195 This file is part of GNU Libtool.
1197 Copying and distribution of this file, with or without modification,
1198 are permitted in any medium without royalty provided the copyright
1199 notice and this notice are preserved. This file is offered as-is,
1200 without warranty of any kind.