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#serial 2
dnl From Jim Meyering.
dnl Determine whether the strerror_r implementation is one of
dnl the broken ones that returns `int' rather than `char*'.
dnl Actually, this tests only whether it returns a scalar
dnl or an array, but that should be enough.
dnl On at least DEC UNIX 4.0[A-D] and HP-UX B.10.20, strerror_r
dnl returns `int'. This is used by lib/error.c.
AC_DEFUN(jm_FUNC_STRERROR_R,
[
# Check strerror_r
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],
jm_cv_func_working_strerror_r,
[
AC_TRY_COMPILE(
[
# include <stdio.h>
# if HAVE_STRING_H
# include <string.h>
# endif
],
[
int buf; /* avoiding square brackets makes this easier */
char x = *strerror_r (0, buf, sizeof buf);
],
jm_cv_func_working_strerror_r=yes,
jm_cv_func_working_strerror_r=no
)
if test $jm_cv_func_working_strerror_r = yes; then
AC_DEFINE_UNQUOTED(HAVE_WORKING_STRERROR_R, 1,
[Define to 1 if strerror_r returns a string.])
fi
])
fi
])
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