(LIBC_PROG_FOO_GNU): Don't depend on GNU grep.

diff --git a/aclocal.m4 b/aclocal.m4
index 582e0a8..c995e45 100644 (file)
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -94,7 +94,7 @@ cross_compiling=$ac_cv_prog_cc_cross
 AC_DEFUN(LIBC_PROG_FOO_GNU,
 [# Most GNU programs take a -v and spit out some text including
 # the word 'GNU'.  Some try to read stdin, so give them /dev/null.
-if $1 -v </dev/null 2>&1 | grep -q GNU; then
+if $1 -v </dev/null 2>&1 | grep GNU 2>&1 > /dev/null; then
   $2
 else
   $3