[PATCH] tests: fix spurious failures in lflags*.test

[Stefano Lattarini]

Hello automakers.

The tests `lflags.test' and `lflags2.test' fail if an environment variable
LEX is defined, because they call `make -e', thus letting the value of that
variable override the value we forced at configure time.  This bug is the
the same already discovered in yflags*.test (and fixed in previous commit
v1.11-137-gc876b0e).  The attached patch fixes it.

OK for a temporary branch 'lflags-test-fixes' (stemming out of commit
v1.11-136-gfee7d0d "Fix minor testsuite issues, update docs, for Yacc/Lex
changes"), to be merged into maint and yacc-work?

Regards,
  Stefano

From 57198decf1d0dfa758d70ac564e2aec4281798d0 Mon Sep 17 00:00:00 2001
From: Stefano Lattarini <address@hidden>
Date: Sat, 29 Jan 2011 18:35:45 +0100
Subject: [PATCH] tests: fix spurious failures in lflags*.test

* tests/lflags.test: Remove 'LEX' from the environment, so
that it won't be erroneously picked up by `make -e'.
* tests/lflags2.test: Likewise.
---
 ChangeLog          |    7 +++++++
 tests/lflags.test  |    4 ++++
 tests/lflags2.test |    4 ++++
 3 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 98e5792..b0c6f16 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2011-01-29  Stefano Lattarini  <address@hidden>
+
+       tests: fix spurious failures in lflags*.test
+       * tests/lflags.test: Remove 'LEX' from the environment, so
+       that it won't be erroneously picked up by `make -e'.
+       * tests/lflags2.test: Likewise.
+
 2010-06-21  Ralf Wildenhues  <address@hidden>
 
        Fix minor testsuite issues, update docs, for Yacc/Lex changes.
diff --git a/tests/lflags.test b/tests/lflags.test
index 97de608..4c3e048 100755
--- a/tests/lflags.test
+++ b/tests/lflags.test
@@ -30,6 +30,10 @@ echo 'extern int dummy;' >> lex.yy.c
 END
 chmod a+x fake-lex
 
+# Remove Lex from the environment, so that it won't interfere
+# with `make -e' below.
+unset LEX || :
+
 cat >> configure.in <<'END'
 AC_PROG_CC
 # Simulate presence of Lex using our fake-lex script.
diff --git a/tests/lflags2.test b/tests/lflags2.test
index df766b2..f13c656 100755
--- a/tests/lflags2.test
+++ b/tests/lflags2.test
@@ -31,6 +31,10 @@ echo 'extern int dummy;' >> lex.yy.c
 END
 chmod a+x fake-lex
 
+# Remove Lex from the environment, so that it won't interfere
+# with `make -e' below.
+unset LEX || :
+
 cat >> configure.in <<'END'
 AC_PROG_CXX
 # Simulate presence of Lex using our fake-lex script.
-- 
1.7.2.3