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#serial 1002, but ported to autoconf 2.13 by eggert
# Experimental replacement for the function in the latest CVS autoconf.
# If the compile-test says strerror_r doesn't work, then resort to a
# `run'-test that works on BeOS and segfaults on DEC Unix.
# Use with the error.c file in ../lib.
undefine([AC_FUNC_STRERROR_R])
# AC_FUNC_STRERROR_R
# ------------------
AC_DEFUN([AC_FUNC_STRERROR_R],
[jm_CHECK_DECLARATION(strerror_r, [#include <string.h>])
test $jm_cv_func_decl_strerror_r != yes
AC_DEFINE_UNQUOTED(HAVE_DECL_STRERROR_R, $?,
[Define to 1 if strerror_r is declared.])
AC_CHECK_FUNCS([strerror_r])
if test $ac_cv_func_strerror_r = yes; then
AC_CHECK_HEADERS(string.h)
AC_CACHE_CHECK([for working strerror_r],
ac_cv_func_strerror_r_works,
[
AC_TRY_COMPILE(
[
# include <stdio.h>
# if HAVE_STRING_H
# include <string.h>
# endif
],
[
char buf[100];
char x = *strerror_r (0, buf, sizeof buf);
],
ac_cv_func_strerror_r_works=yes,
ac_cv_func_strerror_r_works=no
)
if test $ac_cv_func_strerror_r_works = no; then
# strerror_r seems not to work, but now we have to 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_TRY_RUN(
[
# include <stdio.h>
# include <string.h>
# include <ctype.h>
extern char *strerror_r ();
int
main ()
{
char buf[100];
char x = *strerror_r (0, buf, sizeof buf);
exit (!isalpha (x));
}
],
ac_cv_func_strerror_r_works=yes,
ac_cv_func_strerror_r_works=no,
ac_cv_func_strerror_r_works=no)
fi
])
if test $ac_cv_func_strerror_r_works = yes; then
AC_DEFINE_UNQUOTED(HAVE_WORKING_STRERROR_R, 1,
[Define to 1 if strerror_r returns a string.])
fi
fi
])# AC_FUNC_STRERROR_R
|
