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Member "gnuastro-0.9/bootstrapped/m4/perror.m4" (17 Apr 2019, 2671 Bytes) of package /linux/privat/gnuastro-0.9.tar.lz:


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    1 # perror.m4 serial 8
    2 dnl Copyright (C) 2008-2019 Free Software Foundation, Inc.
    3 dnl This file is free software; the Free Software Foundation
    4 dnl gives unlimited permission to copy and/or distribute it,
    5 dnl with or without modifications, as long as this notice is preserved.
    6 
    7 AC_DEFUN([gl_FUNC_PERROR],
    8 [
    9   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
   10   AC_REQUIRE([gl_HEADER_ERRNO_H])
   11   AC_REQUIRE([gl_FUNC_STRERROR_R])
   12   AC_REQUIRE([gl_FUNC_STRERROR_0])
   13   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   14   dnl We intentionally do not check for the broader REPLACE_STRERROR_R,
   15   dnl since on glibc systems, strerror_r is replaced only for signature
   16   dnl issues, and perror is just fine.  Rather, we only want to
   17   dnl replace perror if strerror_r was replaced for a content fix.
   18   if test "$ERRNO_H:$REPLACE_STRERROR_0" != :0; then
   19     dnl The system's perror() cannot know about the new errno values we add
   20     dnl to <errno.h>, or any fix for strerror(0). Replace it.
   21     REPLACE_PERROR=1
   22   fi
   23   case ${gl_cv_func_strerror_r_works-unset} in
   24     unset|*yes)
   25       AC_CACHE_CHECK([whether perror matches strerror],
   26         [gl_cv_func_perror_works],
   27         [AC_RUN_IFELSE(
   28            [AC_LANG_PROGRAM(
   29               [[#include <errno.h>
   30                 #include <stdio.h>
   31                 #include <stdlib.h>
   32                 #include <string.h>
   33               ]],
   34               [[char *str = strerror (-1);
   35                 if (!getenv("CONFTEST_OUTPUT")) return 0;
   36                 if (!str) str = "";
   37                 puts (str);
   38                 errno = -1;
   39                 perror ("");
   40                 return 0;
   41               ]])],
   42            [if CONFTEST_OUTPUT=1 ./conftest$EXEEXT >conftest.txt1 2>conftest.txt2 \
   43                && cmp conftest.txt1 conftest.txt2 >/dev/null; then
   44               gl_cv_func_perror_works=yes
   45             else
   46               gl_cv_func_perror_works=no
   47             fi
   48             rm -rf conftest.txt1 conftest.txt2],
   49            [gl_cv_func_perror_works=no],
   50            [case "$host_os" in
   51                        # Guess yes on musl systems.
   52               *-musl*) gl_cv_func_perror_works="guessing yes" ;;
   53                        # Guess yes on native Windows.
   54               mingw*)  gl_cv_func_perror_works="guessing yes" ;;
   55                        # Otherwise guess no.
   56               *)       gl_cv_func_perror_works="guessing no" ;;
   57             esac
   58            ])
   59         ])
   60       case "$gl_cv_func_perror_works" in
   61         *yes) ;;
   62         *) REPLACE_PERROR=1 ;;
   63       esac
   64       ;;
   65     *)
   66       dnl The system's perror() probably inherits the bugs in the
   67       dnl system's strerror_r(). Replace it.
   68       REPLACE_PERROR=1
   69       ;;
   70   esac
   71 ])