From fa048ccd3675cf90652c8154be797442eaa09f9b Mon Sep 17 00:00:00 2001
From: Jarkko Hietaniemi <jhi@iki.fi>
Date: Thu, 8 Nov 2001 15:13:15 +0000
Subject: [PATCH] The MakeMaker argument () quoting patch that sneaked in at
 #12883 didn't handle make macros like this $(...). Leaning toothpicks, we've
 got them.

p4raw-id: //depot/perl@12902
---
 lib/ExtUtils/MM_Unix.pm | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/lib/ExtUtils/MM_Unix.pm b/lib/ExtUtils/MM_Unix.pm
index 8b236fc..83b113b 100644
--- a/lib/ExtUtils/MM_Unix.pm
+++ b/lib/ExtUtils/MM_Unix.pm
@@ -220,6 +220,7 @@ sub ExtUtils::MM_Unix::postamble ;
 sub ExtUtils::MM_Unix::ppd ;
 sub ExtUtils::MM_Unix::prefixify ;
 sub ExtUtils::MM_Unix::processPL ;
+sub ExtUtils::MM_Unix::quote_paren ;
 sub ExtUtils::MM_Unix::realclean ;
 sub ExtUtils::MM_Unix::replace_manpage_separator ;
 sub ExtUtils::MM_Unix::static ;
@@ -397,8 +398,8 @@ sub cflags {
 	$pollute = '$(PERL_MALLOC_DEF)';
     }
 
-    $self->{CCFLAGS}  =~ s/([()])/\\$1/g;
-    $self->{OPTIMIZE} =~ s/([()])/\\$1/g;
+    $self->{CCFLAGS}  = quote_paren($self->{CCFLAGS});
+    $self->{OPTIMIZE} = quote_paren($self->{CCFLAGS});
 
     return $self->{CFLAGS} = qq{
 CCFLAGS = $self->{CCFLAGS}
@@ -505,8 +506,7 @@ sub const_config {
     foreach $m (@{$self->{CONFIG}}){
 	# SITE*EXP macros are defined in &constants; avoid duplicates here
 	next if $once_only{$m} or $m eq 'sitelibexp' or $m eq 'sitearchexp';
-	$self->{uc $m} =~ s/([()])/\\$1/g;
-	push @m, "\U$m\E = ".$self->{uc $m}."\n";
+	push @m, uc($m) , ' = ' , quote_paren($self->{uc $m}), "\n";
 	$once_only{$m} = 1;
     }
     join('', @m);
@@ -3160,6 +3160,22 @@ $target :: $plfile
     join "", @m;
 }
 
+=item quote_paren
+
+Backslashes parentheses C<()> in command line arguments.
+Doesn't handle recursive Makefile C<$(...)> constructs,
+but handles simple ones.
+
+=cut
+
+sub quote_paren {
+    local $_ = shift;
+    s/\$\((.+?)\)/\$\\\\($1\\\\)/g;	# protect $(...)
+    s/(?<!\\)([()])/\\$1/g;		# quote unprotected
+    s/\$\\\\\((.+?)\\\\\)/\$($1)/g;	# unprotect $(...)
+    return $_;
+}
+
 =item realclean (o)
 
 Defines the realclean target.
-- 
2.7.4