From cd7605723eb8e6d8231644f1cf62f1e80badf074 Mon Sep 17 00:00:00 2001
From: Peter Korsgaard <peter@korsgaard.com>
Date: Mon, 20 Aug 2018 15:57:22 +0200
Subject: [PATCH] configure.in: tighten AIX test

Depending on the configuration, the cpp output may contain the string 'yes'
in a comment if built under a path containing 'yes', confusing the _AIX
test:

${CROSS}-cpp conftest.h
\# 1 "conftest.h"
\# 1 "<built-in>"
\# 1 "<command-line>"
\# 31 "<command-line>"
\# 1 "/home/peko/source/buildroot/output-yes/host/x86_64-buildroot-linux-gnu/sysroot/usr/include/stdc-predef.h" 1 3 4
\# 32 "<command-line>" 2
\# 1 "conftest.txt"

Fix it by only matching on 'yes' on a line by itself.

Upstream-status: submitted to author
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---

 autoconf/configure.in | 2 +-
 configure             | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/autoconf/configure.in b/autoconf/configure.in
index bd45004..487c42b 100644
--- a/autoconf/configure.in
+++ b/autoconf/configure.in
@@ -86,7 +86,7 @@ AC_PROG_MAKE_SET
 
 dnl AIX needs -lc128
 dnl
-AC_EGREP_CPP([yes], [#ifdef _AIX
+AC_EGREP_CPP([^yes$], [#ifdef _AIX
 yes
 #endif
 ], [LIBS="$LIBS -lc128"])
diff --git a/configure b/configure
index 7c11be0..59267b9 100755
--- a/configure
+++ b/configure
@@ -3377,7 +3377,7 @@ yes
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "yes" >/dev/null 2>&1; then
+  $EGREP "^yes$" >/dev/null 2>&1; then
   LIBS="$LIBS -lc128"
 fi
 rm -f conftest*
-- 
2.11.0