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! /bin/sh

depcomp - compile a program generating dependencies as side-effects

scriptversion=2013-05-30.07; # UTC

Copyright © 1999-2013 Free Software Foundation, Inc.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see http://www.gnu.org/licenses/.

As a special exception to the GNU General Public License, if you

distribute this file as part of a program that contains a

configuration script generated by Autoconf, you may include it under

the same distribution terms that you use for the rest of that program.

Originally written by Alexandre Oliva oliva@dcc.unicamp.br.

case $1 in ‘’) echo “$0: No command. Try ‘$0 –help’ for more information.” 1>&2 exit 1; ;; -h | –h*) cat <<\EOF Usage: depcomp [–help] [–version] PROGRAM [ARGS]

Run PROGRAMS ARGS to compile a file, generating dependencies as side-effects.

Environment variables: depmode Dependency tracking mode. source Source file read by ‘PROGRAMS ARGS’. object Object file output by ‘PROGRAMS ARGS’. DEPDIR directory where to store dependencies. depfile Dependency file to output. tmpdepfile Temporary file to use when outputting dependencies. libtool Whether libtool is used (yes/no).

Report bugs to bug-automake@gnu.org. EOF exit $? ;; -v | –v*) echo “depcomp $scriptversion” exit $? ;; esac

Get the directory component of the given path, and save it in the

global variables ‘$dir’. Note that this directory component will

be either empty or ending with a ‘/’ character. This is deliberate.

set_dir_from () { case $1 in /) dir=echo "$1" | sed -e 's|/[^/]*$|/|';; *) dir=;; esac }

Get the suffix-stripped basename of the given path, and save it the

global variable ‘$base’.

set_base_from () { base=echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//' }

If no dependency file was actually created by the compiler invocation,

we still have to create a dummy depfile, to avoid errors with the

Makefile “include basename.Plo” scheme.

make_dummy_depfile () { echo “#dummy” > “$depfile” }

Factor out some common post-processing of the generated depfile.

Requires the auxiliary global variable ‘$tmpdepfile’ to be set.

aix_post_process_depfile () { # If the compiler actually managed to produce a dependency file, # post-process it. if test -f “$tmpdepfile”; then # Each line is of the form ‘foo.o: dependency.h’. # Do two passes, one to just change these to # $object: dependency.h # and one to simply output # dependency.h: # which is needed to avoid the deleted-header problem. { sed -e “s,^..[$lower]:,$object:,” < “$tmpdepfile” sed -e “s,^..[$lower]:[$tab ]*,,” -e ’s,$,:,‘ < “$tmpdepfile” } > “$depfile” rm -f “$tmpdepfile” else make_dummy_depfile fi }

A tabulation character.

tab=‘ ’

A newline character.

nl=‘ ’

Character ranges might be problematic outside the C locale.

These definitions help.

upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ lower=abcdefghijklmnopqrstuvwxyz digits=0123456789 alpha=${upper}${lower}

if test -z “$depmode” || test -z “$source” || test -z “$object”; then echo “depcomp: Variables source, object and depmode must be set” 1>&2 exit 1 fi

Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.

depfile=${depfile-echo "$object" | sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'} tmpdepfile=${tmpdepfile-echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'}

rm -f “$tmpdepfile”

Avoid interferences from the environment.

gccflag= dashmflag=

Some modes work just like other modes, but use different flags. We

parameterize here, but still list the modes in the big case below,

to make depend.m4 easier to write. Note that we cannot use a case

here, because this file can only contain one case statement.

if test “$depmode” = hp; then # HP compiler uses -M and no extra arg. gccflag=-M depmode=gcc fi

if test “$depmode” = dashXmstdout; then # This is just like dashmstdout with a different argument. dashmflag=-xM depmode=dashmstdout fi

cygpath_u=“cygpath -u -f -” if test “$depmode” = msvcmsys; then # This is just like msvisualcpp but w/o cygpath translation. # Just convert the backslash-escaped backslashes to single forward # slashes to satisfy depend.m4 cygpath_u=‘sed s,\\,/,g’ depmode=msvisualcpp fi

if test “$depmode” = msvc7msys; then # This is just like msvc7 but w/o cygpath translation. # Just convert the backslash-escaped backslashes to single forward # slashes to satisfy depend.m4 cygpath_u=‘sed s,\\,/,g’ depmode=msvc7 fi

if test “$depmode” = xlc; then # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information. gccflag=-qmakedep=gcc,-MF depmode=gcc fi

case “$depmode” in gcc3)

gcc 3 implements dependency tracking that does exactly what

we want. Yay! Note: for some reason libtool 1.4 doesn’t like

it if -MD -MP comes after the -MF stuff. Hmm.

Unfortunately, FreeBSD c89 acceptance of flags depends upon

the command line argument order; so add the flags where they

appear in depend2.am. Note that the slowdown incurred here

affects only configure: in makefiles, %FASTDEP% shortcuts this.

for arg do case $arg in -c) set fnord “$@” -MT “$object” -MD -MP -MF “$tmpdepfile” “$arg” ;; *) set fnord “$@” “$arg” ;; esac shift # fnord shift # $arg done “$@” stat=$? if test $stat -ne 0; then rm -f “$tmpdepfile” exit $stat fi mv “$tmpdepfile” “$depfile” ;;

gcc)

Note that this doesn’t just cater to obsosete pre-3.x GCC compilers.

but also to in-use compilers like IMB xlc/xlC and the HP C compiler.

(see the conditional assignment to $gccflag above).

There are various ways to get dependency output from gcc. Here’s

why we pick this rather obscure method:

- Don’t want to use -MD because we’d like the dependencies to end

up in a subdir. Having to rename by hand is ugly.

(We might end up doing this anyway to support other compilers.)

- The DEPENDENCIES_OUTPUT environment variable makes gcc act like

-MM, not -M (despite what the docs say). Also, it might not be

supported by the other compilers which use the ‘gcc’ depmode.

- Using -M directly means running the compiler twice (even worse

than renaming).

if test -z “$gccflag”; then gccflag=-MD, fi “$@” -Wp,“$gccflag$tmpdepfile” stat=$? if test $stat -ne 0; then rm -f “$tmpdepfile” exit $stat fi rm -f “$depfile” echo “$object : \” > “$depfile” # The second -e expression handles DOS-style file names with drive # letters. sed -e ’s/^[^:]: / /‘ \ -e ’s/^[’$alpha']:\/[^:]: / /‘ < “$tmpdepfile” >> “$depfile”

This next piece of magic avoids the “deleted header file” problem.

The problem is that when a header file which appears in a .P file

is deleted, the dependency causes make to die (because there is

typically no way to rebuild the header). We avoid this by adding

dummy dependencies for each header file. Too bad gcc doesn’t do

this for us directly.

Some versions of gcc put a space before the ‘:’. On the theory

that the space means something, we add a space to the output as

well. hp depmode also adds that space, but also prefixes the VPATH

to the object. Take care to not repeat it in the output.

Some versions of the HPUX 10.20 sed can’t process this invocation

correctly. Breaking it into two sed invocations is a workaround.

tr ‘ ’ “$nl” < “$tmpdepfile” \ | sed -e ’s/^\$//‘ -e ’/^$/d' -e “s|.*$object$||” -e ‘/:$/d’ \ | sed -e ’s/$/ :/‘ >> “$depfile” rm -f “$tmpdepfile” ;;

hp) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;;

sgi) if test “$libtool” = yes; then “$@” “-Wp,-MDupdate,$tmpdepfile” else “$@” -MDupdate “$tmpdepfile” fi stat=$? if test $stat -ne 0; then rm -f “$tmpdepfile” exit $stat fi rm -f “$depfile”

if test -f “$tmpdepfile”; then # yes, the sourcefile depend on other files echo “$object : \” > “$depfile” # Clip off the initial element (the dependent). Don’t try to be # clever and replace this with sed code, as IRIX sed won’t handle # lines with more than a fixed number of characters (4096 in # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines; # the IRIX cc adds comments like ‘#:fec’ to the end of the # dependency line. tr ‘ ’ “$nl” < “$tmpdepfile” \ | sed -e ’s/^..o://‘ -e ’s/#.$//’ -e ‘/^$/ d’ \ | tr “$nl” ‘ ’ >> “$depfile” echo >> “$depfile” # The second pass generates a dummy entry for each header file. tr ‘ ’ “$nl” < “$tmpdepfile” \ | sed -e ’s/^..o://‘ -e ’s/#.$//’ -e ‘/^$/ d’ -e ’s/$/:/‘ \ >> “$depfile” else make_dummy_depfile fi rm -f “$tmpdepfile” ;;

xlc) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;;

aix) # The C for AIX Compiler uses -M and outputs the dependencies # in a .u file. In older versions, this file always lives in the # current directory. Also, the AIX compiler puts ‘$object:’ at the # start of each line; $object doesn’t have directory information. # Version 6 uses the directory in both cases. set_dir_from “$object” set_base_from “$object” if test “$libtool” = yes; then tmpdepfile1=$dir$base.u tmpdepfile2=$base.u tmpdepfile3=$dir.libs/$base.u “$@” -Wc,-M else tmpdepfile1=$dir$base.u tmpdepfile2=$dir$base.u tmpdepfile3=$dir$base.u “$@” -M fi stat=$? if test $stat -ne 0; then rm -f “$tmpdepfile1” “$tmpdepfile2” “$tmpdepfile3” exit $stat fi

for tmpdepfile in “$tmpdepfile1” “$tmpdepfile2” “$tmpdepfile3” do test -f “$tmpdepfile” && break done aix_post_process_depfile ;;

tcc) # tcc (Tiny C Compiler) understand ‘-MD -MF file’ since version 0.9.26 # FIXME: That version still under development at the moment of writing. # Make that this statement remains true also for stable, released # versions. # It will wrap lines (doesn’t matter whether long or short) with a # trailing ‘\’, as in: # # foo.o : \ # foo.c \ # foo.h \ # # It will put a trailing ‘\’ even on the last line, and will use leading # spaces rather than leading tabs (at least since its commit 0394caf7 # “Emit spaces for -MD”). “$@” -MD -MF “$tmpdepfile” stat=$? if test $stat -ne 0; then rm -f “$tmpdepfile” exit $stat fi rm -f “$depfile” # Each non-empty line is of the form ‘foo.o : \’ or ‘ dep.h \’. # We have to change lines of the first kind to ‘$object: \’. sed -e “s|.:|$object :|” < “$tmpdepfile” > “$depfile” # And for each line of the second kind, we have to emit a ‘dep.h:’ # dummy dependency, to avoid the deleted-header problem. sed -n -e ’s|^ (.) \$|\1:|p' < “$tmpdepfile” >> “$depfile” rm -f “$tmpdepfile” ;;

The order of this option in the case statement is important, since the

shell code in configure will try each of these formats in the order

listed in this file. A plain ‘-MD’ option would be understood by many

compilers, so we must ensure this comes after the gcc and icc options.

pgcc) # Portland’s C compiler understands ‘-MD’. # Will always output deps to ‘file.d’ where file is the root name of the # source file under compilation, even if file resides in a subdirectory. # The object file name does not affect the name of the ‘.d’ file. # pgcc 10.2 will output # foo.o: sub/foo.c sub/foo.h # and will wrap long lines using ‘\’ : # foo.o: sub/foo.c … \ # sub/foo.h … \ # … set_dir_from “$object” # Use the source, not the object, to determine the base name, since # that’s sadly what pgcc will do too. set_base_from “$source” tmpdepfile=$base.d

# For projects that build the same source file twice into different object # files, the pgcc approach of using the source file root name can cause # problems in parallel builds. Use a locking strategy to avoid stomping on # the same $tmpdepfile. lockdir=$base.d-lock trap “ echo ‘$0: caught signal, cleaning up…’ >&2 rmdir ‘$lockdir’ exit 1 ” 1 2 13 15 numtries=100 i=$numtries while test $i -gt 0; do # mkdir is a portable test-and-set. if mkdir “$lockdir” 2>/dev/null; then # This process acquired the lock. “$@” -MD stat=$? # Release the lock. rmdir “$lockdir” break else # If the lock is being held by a different process, wait # until the winning process is done or we timeout. while test -d “$lockdir” && test $i -gt 0; do sleep 1 i=expr $i - 1 done fi i=expr $i - 1 done trap - 1 2 13 15 if test $i -le 0; then echo “$0: failed to acquire lock after $numtries attempts” >&2 echo “$0: check lockdir ‘$lockdir’” >&2 exit 1 fi

if test $stat -ne 0; then rm -f “$tmpdepfile” exit $stat fi rm -f “$depfile” # Each line is of the form foo.o: dependent.h', # orfoo.o: dep1.h dep2.h \‘, or dep3.h dep4.h \'. # Do two passes, one to just change these to #$object: dependent.h’ and one to simply `dependent.h:‘. sed “s,^[^:]:,$object :,” < “$tmpdepfile” > “$depfile” # Some versions of the HPUX 10.20 sed can’t process this invocation # correctly. Breaking it into two sed invocations is a workaround. sed ’s,^[^:]: (.*)$,\1,;s/^\$//;/^$/d;/:$/d’ < “$tmpdepfile” \ | sed -e ’s/$/ :/‘ >> “$depfile” rm -f “$tmpdepfile” ;;

hp2) # The “hp” stanza above does not work with aCC (C++) and HP’s ia64 # compilers, which have integrated preprocessors. The correct option # to use with these is +Maked; it writes dependencies to a file named # ‘foo.d’, which lands next to the object file, wherever that # happens to be. # Much of this is similar to the tru64 case; see comments there. set_dir_from “$object” set_base_from “$object” if test “$libtool” = yes; then tmpdepfile1=$dir$base.d tmpdepfile2=$dir.libs/$base.d “$@” -Wc,+Maked else tmpdepfile1=$dir$base.d tmpdepfile2=$dir$base.d “$@” +Maked fi stat=$? if test $stat -ne 0; then rm -f “$tmpdepfile1” “$tmpdepfile2” exit $stat fi

for tmpdepfile in “$tmpdepfile1” “$tmpdepfile2” do test -f “$tmpdepfile” && break done if test -f “$tmpdepfile”; then sed -e “s,^..[$lower]:,$object:,” “$tmpdepfile” > “$depfile” # Add ‘dependent.h:’ lines. sed -ne ‘2,${ s/^ // s/ \$// s/$/:/ p }’ “$tmpdepfile” >> “$depfile” else make_dummy_depfile fi rm -f “$tmpdepfile” “$tmpdepfile2” ;;

tru64) # The Tru64 compiler uses -MD to generate dependencies as a side # effect. ‘cc -MD -o foo.o …’ puts the dependencies into ‘foo.o.d’. # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put # dependencies in ‘foo.d’ instead, so we check for that too. # Subdirectories are respected. set_dir_from “$object” set_base_from “$object”

if test “$libtool” = yes; then # Libtool generates 2 separate objects for the 2 libraries. These # two compilations output dependencies in $dir.libs/$base.o.d and # in $dir$base.o.d. We have to check for both files, because # one of the two compilations can be disabled. We should prefer # $dir$base.o.d over $dir.libs/$base.o.d because the latter is # automatically cleaned when .libs/ is deleted, while ignoring # the former would cause a distcleancheck panic. tmpdepfile1=$dir$base.o.d # libtool 1.5 tmpdepfile2=$dir.libs/$base.o.d # Likewise. tmpdepfile3=$dir.libs/$base.d # Compaq CCC V6.2-504 “$@” -Wc,-MD else tmpdepfile1=$dir$base.d tmpdepfile2=$dir$base.d tmpdepfile3=$dir$base.d “$@” -MD fi

stat=$? if test $stat -ne 0; then rm -f “$tmpdepfile1” “$tmpdepfile2” “$tmpdepfile3” exit $stat fi

for tmpdepfile in “$tmpdepfile1” “$tmpdepfile2” “$tmpdepfile3” do test -f “$tmpdepfile” && break done # Same post-processing that is required for AIX mode. aix_post_process_depfile ;;

msvc7) if test “$libtool” = yes; then showIncludes=-Wc,-showIncludes else showIncludes=-showIncludes fi “$@” $showIncludes > “$tmpdepfile” stat=$? grep -v ‘^Note: including file: ’ “$tmpdepfile” if test $stat -ne 0; then rm -f “$tmpdepfile” exit $stat fi rm -f “$depfile” echo “$object : \” > “$depfile” # The first sed program below extracts the file names and escapes # backslashes for cygpath. The second sed program outputs the file # name when reading, but also accumulates all include files in the # hold buffer in order to output them again at the end. This only # works with sed implementations that can handle large buffers. sed < “$tmpdepfile” -n ‘ /^Note: including file: (.)/ { s//\1/ s/\/\\/g p }’ | $cygpath_u | sort -u | sed -n ‘ s/ /\ /g s/(.)/’“$tab”‘\1 \/p s/.(.) \/\1:/ H $ { s/.*/’“$tab”‘/ G p }’ >> “$depfile” echo >> “$depfile” # make sure the fragment doesn’t end with a backslash rm -f “$tmpdepfile” ;;

msvc7msys) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;;

nosideeffect)

# This comment above is used by automake to tell side-effect # dependency tracking mechanisms from slower ones.

dashmstdout) # Important note: in order to support this mode, a compiler must # always write the preprocessed file to stdout, regardless of -o. “$@” || exit $?

# Remove the call to Libtool. if test “$libtool” = yes; then while test “X$1” != ‘X–mode=compile’; do shift done shift fi

# Remove ‘-o $object’. IFS=“ ” for arg do case $arg in -o) shift ;; $object) shift ;; *) set fnord “$@” “$arg” shift # fnord shift # $arg ;; esac done

test -z “$dashmflag” && dashmflag=-M # Require at least two characters before searching for ‘:’ # in the target name. This is to cope with DOS-style filenames: # a dependency such as ‘c:/foo/bar’ could be seen as target ‘c’ otherwise. “$@” $dashmflag | sed “s|^[$tab ][^:$tab ][^:][^:]:[$tab ]*|$object: |” > “$tmpdepfile” rm -f “$depfile” cat < “$tmpdepfile” > “$depfile” # Some versions of the HPUX 10.20 sed can’t process this sed invocation # correctly. Breaking it into two sed invocations is a workaround. tr ‘ ’ “$nl” < “$tmpdepfile” \ | sed -e ’s/^\$//‘ -e ’/^$/d' -e ‘/:$/d’ \ | sed -e ’s/$/ :/‘ >> “$depfile” rm -f “$tmpdepfile” ;;

dashXmstdout) # This case only exists to satisfy depend.m4. It is never actually # run, as this mode is specially recognized in the preamble. exit 1 ;;

makedepend) “$@” || exit $? # Remove any Libtool call if test “$libtool” = yes; then while test “X$1” != ‘X–mode=compile’; do shift done shift fi # X makedepend shift cleared=no eat=no for arg do case $cleared in no) set “”; shift cleared=yes ;; esac if test $eat = yes; then eat=no continue fi case “$arg” in -D|-I) set fnord “$@” “$arg”; shift ;; # Strip any option that makedepend may not understand. Remove # the object too, otherwise makedepend will parse it as a source file. -arch) eat=yes ;; -|$object) ;; ) set fnord “$@” “$arg”; shift ;; esac done obj_suffix=echo "$object" | sed 's/^.*\././' touch “$tmpdepfile” ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" “$@” rm -f “$depfile” # makedepend may prepend the VPATH from the source file name to the object. # No need to regex-escape $object, excess matching of ‘.’ is harmless. sed “s|^.($object :)|\1|” “$tmpdepfile” > “$depfile” # Some versions of the HPUX 10.20 sed can’t process the last invocation # correctly. Breaking it into two sed invocations is a workaround. sed ‘1,2d’ “$tmpdepfile” \ | tr ‘ ’ “$nl” \ | sed -e ’s/^\$//‘ -e ’/^$/d' -e ‘/:$/d’ \ | sed -e ’s/$/ :/‘ >> “$depfile” rm -f “$tmpdepfile” “$tmpdepfile”.bak ;;

cpp) # Important note: in order to support this mode, a compiler must # always write the preprocessed file to stdout. “$@” || exit $?

# Remove the call to Libtool. if test “$libtool” = yes; then while test “X$1” != ‘X–mode=compile’; do shift done shift fi

# Remove ‘-o $object’. IFS=“ ” for arg do case $arg in -o) shift ;; $object) shift ;; *) set fnord “$@” “$arg” shift # fnord shift # $arg ;; esac done

“$@” -E \ | sed -n -e ‘/^# [0-9][0-9] “([^”])“./ s:: \1 \:p’ \ -e ‘/^#line [0-9][0-9] ”([^“])”./ s:: \1 \:p’ \ | sed ‘$ s: \$::’ > “$tmpdepfile” rm -f “$depfile” echo “$object : \” > “$depfile” cat < “$tmpdepfile” >> “$depfile” sed < “$tmpdepfile” ‘/^$/d;s/^ //;s/ \$//;s/$/ :/’ >> “$depfile” rm -f “$tmpdepfile” ;;

msvisualcpp) # Important note: in order to support this mode, a compiler must # always write the preprocessed file to stdout. “$@” || exit $?

# Remove the call to Libtool. if test “$libtool” = yes; then while test “X$1” != ‘X–mode=compile’; do shift done shift fi

IFS=“ ” for arg do case “$arg” in -o) shift ;; $object) shift ;; “-Gm”|“/Gm”|“-Gi”|“/Gi”|“-ZI”|“/ZI”) set fnord “$@” shift shift ;; ) set fnord “$@” “$arg” shift shift ;; esac done “$@” -E 2>/dev/null | sed -n ‘/^#line [0-9][0-9] “([^”])“/ s::\1:p’ | $cygpath_u | sort -u > ”$tmpdepfile" rm -f “$depfile” echo “$object : \” > “$depfile” sed < “$tmpdepfile” -n -e ’s% %\ %g' -e ‘/^(.)$/ s::’“$tab”‘\1 \:p’ >> “$depfile” echo “$tab” >> “$depfile” sed < “$tmpdepfile” -n -e ’s% %\ %g' -e ‘/^(.*)$/ s::\1::p’ >> “$depfile” rm -f “$tmpdepfile” ;;

msvcmsys) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;;

none) exec “$@” ;;

*) echo “Unknown depmode $depmode” 1>&2 exit 1 ;; esac

exit 0

Local Variables:

mode: shell-script

sh-indentation: 2

eval: (add-hook ‘write-file-hooks 'time-stamp)

time-stamp-start: “scriptversion=”

time-stamp-format: “%:y-%02m-%02d.%02H”

time-stamp-time-zone: “UTC”

time-stamp-end: “; # UTC”

End: