math/highs: Add test target, remove tests from build

i386 should be fixed now because the failure was during the test execitable build.

math/highs/Makefile

@@ -10,18 +10,21 @@ COMMENT=	Solver for large scale sparse linear programming (LP) problems
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-BROKEN_i386=	undefined reference to fmax, see https://github.com/ERGO-Code/HiGHS/issues/505
-
 LIB_DEPENDS=	libOsi.so:math/osi
 
-USES=		blaslapack cmake compiler:c++11-lang pkgconfig
+USES=		blaslapack cmake:testing compiler:c++11-lang pkgconfig
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	ERGO-Code
 GH_PROJECT=	HiGHS
 GH_TAGNAME=	cfe064e
 
+CMAKE_OFF=	BUILD_TESTING
+
 post-install: # see https://github.com/ERGO-Code/HiGHS/issues/502
 	${RM} -r ${STAGEDIR}${PREFIX}/external
 
+# tests fail to build on i386: undefined reference to fmax, see https://github.com/ERGO-Code/HiGHS/issues/505
+# 2 tests fail: https://github.com/ERGO-Code/HiGHS/issues/525
+
 .include <bsd.port.mk>