Base GCC doesn't support -Wno-incompatible-pointer-types, which breaks

building on GCC-based architectures.  Add -Wno-incompatible-pointer-types
only when using Clang.

PR:		235512
Submitted by:	Piotr Kubaj
Approved by:	maintainer

math/rexx-regmath/Makefile

@@ -14,16 +14,10 @@ COMMENT=	Two mathematics libraries for Rexx
 
 LICENSE=	MPL10
 
-BROKEN_mips=		fails to compile: unrecognized command line option "-Wno-incompatible-pointer-types"
-BROKEN_mips64=		fails to compile: unrecognized command line option "-Wno-incompatible-pointer-types"
-BROKEN_powerpc64=	fails to compile: unrecognized command line option "-Wno-incompatible-pointer-types"
-
 BUILD_DEPENDS=	${LOCALBASE}/include/rexxsaa.h:lang/rexx-regina
 
 USES=		zip
 
-CFLAGS+=	-Wno-incompatible-pointer-types
-
 WRKSRC=		${WRKDIR}/math
 USE_LDCONFIG=	yes
 LLD_UNSAFE=	yes
@@ -38,6 +32,10 @@ PORTEXAMPLES=	README testrxmath testrexxmath
 
 OPTIONS_DEFINE=	DOCS EXAMPLES
 
+.if !exists(/usr/lib/libstdc++.so)
+CFLAGS+=	-Wno-incompatible-pointer-types
+.endif
+
 do-install:
 		${INSTALL_LIB} ${WRKSRC}/librexxmath.so ${STAGEDIR}${PREFIX}/lib/
 		${INSTALL_LIB} ${WRKSRC}/librxmath.so ${STAGEDIR}${PREFIX}/lib/

math/rexx-regmath/files/patch-Makefile.bsd

@@ -1,12 +1,11 @@
---- Makefile.bsd.orig	2001-11-04 18:09:04 UTC
+--- Makefile.bsd.orig	2001-11-04 17:09:04 UTC
 +++ Makefile.bsd
-@@ -9,7 +9,8 @@
+@@ -9,7 +9,7 @@
  POPT=-O -fomit-frame-pointer
  PLFL=-s
  DEBUG=-g
 -CFLAGS=$(OPT) $(DEBUG) -pipe -fpic -I $$HOME/regina -pipe
 +CFLAGS+=$(OPT) $(DEBUG) -pipe -fpic -I $$HOME/regina -pipe -I/usr/local/include
-+CFLAGS+=-Wno-incompatible-pointer-types
  LDFLAGS=-Bdynamic -Bshareable $(LFL)
  LIBS=-lm
  so=so