Insist on GCC_REQD+=, not GCC_REQD=.

[Christian Koch <cfkoch%edgebsd.org@localhost>]

Module Name:	pkgsrc-wip
Committed By:	Christian Koch <cfkoch%edgebsd.org@localhost>
Pushed By:	cfkoch
Date:		Sat Jun 25 12:31:21 2016 -0700
Changeset:	7b41b39ee6659541dfaaa3370b372d32fe9b64f8

Modified Files:
	openclonk/Makefile

Log Message:
Insist on GCC_REQD+=, not GCC_REQD=.

Suggested-by: jperkin

To see a diff of this commit:
https://wip.pkgsrc.org/cgi-bin/gitweb.cgi?p=pkgsrc-wip.git;a=commitdiff;h=7b41b39ee6659541dfaaa3370b372d32fe9b64f8

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

diffstat:
 openclonk/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diffs:
diff --git a/openclonk/Makefile b/openclonk/Makefile
index 1c1c824..eb480cd 100644
--- a/openclonk/Makefile
+++ b/openclonk/Makefile
@@ -15,7 +15,7 @@ LICENSE=	isc
 USE_CMAKE=	yes
 USE_LANGUAGES=	c c++
 USE_TOOLS+=	pkg-config
-GCC_REQD=	4.9
+GCC_REQD+=	4.9
 
 .include "../../devel/readline/buildlink3.mk"
 .include "../../graphics/freetype2/buildlink3.mk"