From d0acf56c9c4ee38ab3c709eb173a42bf3d6d4349 Mon Sep 17 00:00:00 2001
From: Steven Knight <knight@baldmt.com>
Date: Sun, 15 Jun 2003 01:45:15 +0000
Subject: Portability fixes for non-GNU lex and yacc.  (Chad Austin)

---
 src/CHANGES.txt               | 2 ++
 src/engine/SCons/Tool/lex.py  | 4 ++--
 src/engine/SCons/Tool/yacc.py | 4 ++--
 src/setupTests.py             | 2 +-
 test/YACC.py                  | 1 +
 test/YACCFLAGS.py             | 1 +
 6 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/CHANGES.txt b/src/CHANGES.txt
index 3c38ecf..9b326d3 100644
--- a/src/CHANGES.txt
+++ b/src/CHANGES.txt
@@ -14,6 +14,8 @@ RELEASE 0.15 - XXX
 
   - Fix the _concat() documentation, and add a test for it.
 
+  - Portability fixes for non-GNU versions of lex and yacc.
+
   From Matt Balvin:
 
   - Fix handling of library prefixes when the subdirectory matches
diff --git a/src/engine/SCons/Tool/lex.py b/src/engine/SCons/Tool/lex.py
index 95a5315..9ef2167 100644
--- a/src/engine/SCons/Tool/lex.py
+++ b/src/engine/SCons/Tool/lex.py
@@ -43,9 +43,9 @@ def generate(env):
     c_file.add_action('.l', '$LEXCOM')
     cxx_file.add_action('.ll', '$LEXCOM')
 
-    env['LEX']      = 'lex'
+    env['LEX']      = env.Detect('flex') or 'lex'
     env['LEXFLAGS'] = ''
     env['LEXCOM']   = '$LEX $LEXFLAGS -t $SOURCES > $TARGET'
     
 def exists(env):
-    return env.Detect('lex')
+    return env.Detect(['flex', 'lex'])
diff --git a/src/engine/SCons/Tool/yacc.py b/src/engine/SCons/Tool/yacc.py
index 0c80cf8..7fabbf2 100644
--- a/src/engine/SCons/Tool/yacc.py
+++ b/src/engine/SCons/Tool/yacc.py
@@ -42,9 +42,9 @@ def generate(env):
     c_file.add_action('.y', '$YACCCOM')
     cxx_file.add_action('.yy', '$YACCCOM')
 
-    env['YACC']      = 'yacc'
+    env['YACC']      = env.Detect('bison') or 'yacc'
     env['YACCFLAGS'] = ''
     env['YACCCOM']   = '$YACC $YACCFLAGS -o $TARGET $SOURCES'
 
 def exists(env):
-    return env.Detect('yacc')
+    return env.Detect(['bison', 'yacc'])
diff --git a/src/setupTests.py b/src/setupTests.py
index 6f73e5e..b7adf0c 100644
--- a/src/setupTests.py
+++ b/src/setupTests.py
@@ -77,7 +77,7 @@ version_lib = '%s/usr/lib/%s' % (root, scons_version)
 def installed(lib):
     return 'Installed SCons library modules into %s' % lib
 
-os.system("tar zxf %s" % tar_gz)
+os.system("gunzip -c %s | tar xf -" % tar_gz)
 
 # Verify that a virgin installation installs the standalone library.
 test.run(chdir = scons_version,
diff --git a/test/YACC.py b/test/YACC.py
index b44add1..68a0ba5 100644
--- a/test/YACC.py
+++ b/test/YACC.py
@@ -118,6 +118,7 @@ yyerror(s)
 char *s;
 {
     fprintf(stderr, "%%s\n", s);
+    return 0;
 }
 
 yylex()
diff --git a/test/YACCFLAGS.py b/test/YACCFLAGS.py
index 3ed6b6b..022b238 100644
--- a/test/YACCFLAGS.py
+++ b/test/YACCFLAGS.py
@@ -107,6 +107,7 @@ yyerror(s)
 char *s;
 {
     fprintf(stderr, "%%s\n", s);
+    return 0;
 }
 
 yylex()
-- 
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