Subject: [PATCH] m4: use AS_IF to avoid ! portability issues

From: Mike Frysinger <[email-masked]>
Date: Sun, 15 Jan 2023 03:38:25 -0500

Since the ! builtin has portability issues (as documented in the Autoconf
manual), switch to AS_IF which takes care of these issues for us.

* m4/sanity.m4: Switch `if` to AS_IF.
---
 m4/sanity.m4 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/m4/sanity.m4 b/m4/sanity.m4
index db9a1f5639f1..c24648045e2f 100644
--- a/m4/sanity.m4
+++ b/m4/sanity.m4
@@ -110,10 +110,10 @@ fi
 # If we didn't sleep, we still need to ensure time stamps of config.status and
 # generated files are strictly newer.
 am_sleep_pid=
-if ! test -e conftest.file || grep 'slept: no' conftest.file >/dev/null 2>&1; then
+AS_IF([test -e conftest.file || grep 'slept: no' conftest.file >/dev/null 2>&1],, [dnl
   ( sleep $am_cv_filesystem_timestamp_resolution ) &
   am_sleep_pid=$!
-fi
+])
 AC_CONFIG_COMMANDS_PRE(
   [AC_MSG_CHECKING([that generated files are newer than configure])
    if test -n "$am_sleep_pid"; then
-- 
2.39.0