[PATCH 2/3] AC_SITE_LOAD: add '.exe' to ac_executable_extensions on OS/2

Many codes searching the executables depend on
ac_executable_extensions and $EXEEXT. But without this patch, the
searches fail.

* lib/autoconf/general.m4 (AC_SITE_LOAD): Add '.exe' to
ac_executable_extensions on OS/2.
---
 lib/autoconf/general.m4 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/autoconf/general.m4 b/lib/autoconf/general.m4
index c18b162..1773d46 100644
--- a/lib/autoconf/general.m4
+++ b/lib/autoconf/general.m4
@@ -1971,6 +1971,12 @@ if test -n "$OS2_SHELL"; then
   done
   export PATH="$ac_TEMP_PATH"
   unset ac_TEMP_PATH
+
+  # add .exe to ac_executable_extensions
+  if test -z "$ac_executable_extensions"; then
+    AC_MSG_WARN([ac_executable_extensions not set, assuming .exe])
+  fi
+  ac_executable_extensions="$ac_executable_extensions .exe"
 fi
 ])
 
-- 
1.8.5.2