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#serial 2
dnl From Jim Meyering.
dnl Determine whether lstat has the bug that it succeeds when given the
dnl zero-length file name argument. The lstat from SunOS4.1.4 and the Hurd
dnl (as of 1998-11-01) do this.
dnl
dnl If it does, then define HAVE_LSTAT_EMPTY_STRING_BUG and arrange to
dnl compile the wrapper function.
dnl
AC_DEFUN(jm_FUNC_LSTAT,
[
AC_CACHE_CHECK([whether lstat accepts an empty string],
jm_cv_func_lstat_empty_string_bug,
[AC_TRY_RUN([
# include <sys/types.h>
# include <sys/stat.h>
int
main ()
{
struct stat sbuf;
exit (lstat ("", &sbuf) ? 1 : 0);
}
],
jm_cv_func_lstat_empty_string_bug=yes,
jm_cv_func_lstat_empty_string_bug=no,
dnl When crosscompiling, assume lstat is broken.
jm_cv_func_lstat_empty_string_bug=yes)
])
if test $jm_cv_func_lstat_empty_string_bug = yes; then
LIBOBJS="$LIBOBJS lstat.o"
if test $jm_cv_func_lstat_empty_string_bug = yes; then
if test x = y; then
# This code is deliberately never run via ./configure.
# FIXME: this is a hack to make autoheader put the corresponding
# HAVE_* undef for this symbol in config.h.in. This saves me the
# trouble of having to maintain the #undef in acconfig.h manually.
AC_CHECK_FUNCS(LSTAT_EMPTY_STRING_BUG)
fi
# Defining it this way (rather than via AC_DEFINE) short-circuits the
# autoheader check -- autoheader doesn't know it's already been taken
# care of by the hack above.
ac_kludge=HAVE_LSTAT_EMPTY_STRING_BUG
AC_DEFINE_UNQUOTED($ac_kludge)
fi
fi
])
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