_AC_EVAL_STDERR invocation to avoid `illegal io' on Ultrix.
Reported by Harlan Stenn, and fixed by Jim Meyering.
+2001-03-19 Akim Demaille <akim@epita.fr>
+
+ * acgeneral.m4 (_AC_PREPROC_IFELSE): Redirect stdout out of the
+ _AC_EVAL_STDERR invocation to avoid `illegal io' on Ultrix.
+ Reported by Harlan Stenn, and fixed by Jim Meyering.
+
2001-03-19 Akim Demaille <akim@epita.fr>
* acgeneral.m4 (_AC_OUTPUT_CONFIG_STATUS): Don't hard code
# This macro can be used during the selection of a preprocessor.
AC_DEFUN([_AC_PREPROC_IFELSE],
[m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
-if _AC_EVAL_STDERR([$ac_cpp conftest.$ac_ext >/dev/null]); then
+if _AC_EVAL_STDERR([$ac_cpp conftest.$ac_ext]) >/dev/null; then
if test -s conftest.err; then
ac_cpp_err=$ac_[]_AC_LANG_ABBREV[]_preproc_warn_flag
else
# This macro can be used during the selection of a preprocessor.
AC_DEFUN([_AC_PREPROC_IFELSE],
[m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
-if _AC_EVAL_STDERR([$ac_cpp conftest.$ac_ext >/dev/null]); then
+if _AC_EVAL_STDERR([$ac_cpp conftest.$ac_ext]) >/dev/null; then
if test -s conftest.err; then
ac_cpp_err=$ac_[]_AC_LANG_ABBREV[]_preproc_warn_flag
else