kc3-lang/gnulib/m4/strerror_r.m4
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Hash : 2513f0b7
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Date : 2001-10-21T07:49:13
Add copyright notice, as nontrivial m4 files are supposed to have them these days. (AC_FUNC_STRERROR_R): Always do char* test, so that it gets cached. Merge changes from latest Autoconf CVS. Rename ac_cv_func_strerror_r_works to ac_cv_func_strerror_r_char_p, and rename HAVE_WORKING_STRERROR_R to STRERROR_R_CHAR_P, since POSIX decided to standardize on the int flavor of strerror_r.
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m4/strerror_r.m4
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#serial 1003 # Experimental replacement for the function in the latest CVS autoconf. # Use with the error.c file in ../lib. # Copyright 2001 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, write to the Free Software Foundation, # Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ undefine([AC_FUNC_STRERROR_R]) # AC_FUNC_STRERROR_R # ------------------ AC_DEFUN([AC_FUNC_STRERROR_R], [AC_CHECK_DECLS([strerror_r]) AC_CHECK_FUNCS([strerror_r]) AC_CACHE_CHECK([whether strerror_r returns char *], ac_cv_func_strerror_r_char_p, [ ac_cv_func_strerror_r_char_p=no if test $ac_cv_have_decl_strerror_r = yes; then AC_COMPILE_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT], [[ char buf[100]; char x = *strerror_r (0, buf, sizeof buf); char *p = strerror_r (0, buf, sizeof buf); ]])], ac_cv_func_strerror_r_char_p=yes) else # strerror_r is not declared. Choose between # systems that have relatively inaccessible declarations for the # function. BeOS and DEC UNIX 4.0 fall in this category, but the # former has a strerror_r that returns char*, while the latter # has a strerror_r that returns `int'. # This test should segfault on the DEC system. AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT extern char *strerror_r ();], [[char buf[100]; char x = *strerror_r (0, buf, sizeof buf); exit (!isalpha (x));]])], ac_cv_func_strerror_r_char_p=yes, , :) fi ]) if test $ac_cv_func_strerror_r_char_p = yes; then AC_DEFINE([STRERROR_R_CHAR_P], 1, [Define to 1 if strerror_r returns char *.]) fi ])# AC_FUNC_STRERROR_R