From: Akim Demaille <akim@epita.fr>
Date: Wed, 1 Mar 2000 17:01:29 +0000 (+0000)
Subject: The empty regexp cannot be portably used in egrep's alternation.
X-Git-Tag: autoconf-2.50~1105
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=7a628f50927b678b7520478abba6a44f3794b44e;p=thirdparty%2Fautoconf.git

The empty regexp cannot be portably used in egrep's alternation.
For instance with Digital Unix v5.0:
   > echo "foo"  | egrep -e "^(|foo|bar)$"
   > echo "|foo" | egrep -e "^(|foo|bar)$"
   |foo
   > echo "|bar" | egrep -e "^(|foo|bar)$"
   > echo "bar"  | egrep -e "^(|foo|bar)$"
   bar
Reported by Nicolas Joly.

* src/actest.m4 (AC_ENV_SAVE): s/(|EXTRA_|PRE_)/(EXTRA_|PRE_)?/.
---

diff --git a/ChangeLog b/ChangeLog
index 793be1a6f..694d43c7d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,17 @@
+2000-03-01  Akim Demaille  <akim@epita.fr>
+
+	The empty regexp cannot be portably used in egrep's alternation.
+	For instance with Digital Unix v5.0:
+	   > echo "foo"  | egrep -e "^(|foo|bar)$"
+	   > echo "|foo" | egrep -e "^(|foo|bar)$"
+	   |foo
+	   > echo "|bar" | egrep -e "^(|foo|bar)$"
+	   > echo "bar"  | egrep -e "^(|foo|bar)$"
+	   bar
+	Reported by Nicolas Joly.
+
+	* src/actest.m4 (AC_ENV_SAVE): s/(|EXTRA_|PRE_)/(EXTRA_|PRE_)?/.
+
 2000-03-01  Akim Demaille  <akim@epita.fr>
 
 	* acspecific.m4: Removed a few addresses, the map is...
diff --git a/tests/actest.m4 b/tests/actest.m4
index dc63f1484..6e1a03a96 100644
--- a/tests/actest.m4
+++ b/tests/actest.m4
@@ -26,7 +26,7 @@ AC_DEFUN(AC_ENV_SAVE,
   -e '^(LIBS|LIBOBJS|LDFLAGS)=' \
   -e '^INSTALL(_(DATA|PROGRAM|SCRIPT))?=' \
   -e '^(CYGWIN|ISC|MINGW32|MINIX|EMXOS2|EXEEXT|OBJEXT)=' \
-  -e '^(X_(CFLAGS|(|EXTRA_|PRE_)LIBS)|x_(includes|libraries)|have_x)=' \
+  -e '^(X_(CFLAGS|(EXTRA_|PRE_)?LIBS)|x_(includes|libraries)|have_x)=' \
   -e '^(host|build|target)(_(alias|cpu|vendor|os))?=' \
   -e '^(cross_compiling)=' \
   -e '^(interpval)=' \