Index: comms/flrig/Makefile
===================================================================
--- comms/flrig/Makefile
+++ comms/flrig/Makefile
@@ -29,6 +29,12 @@
 NATIVE_OPT_CONFIGURE_ON+=	--enable-optimizations=native
 NATIVE_OPT_CONFIGURE_OFF+=	--enable-optimizations=none
 
+.include <bsd.port.pre.mk>
+
+# this flag is needed for elfv1 but illegal for elfv2.
+# TODO the bogus OSVERSION value is a placeholder for testing.
+.if ${OSVERSION} < 9999999
 CFLAGS_powerpc64=	-mminimal-toc
+.endif
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>
Index: games/arx-libertatis/Makefile
===================================================================
--- games/arx-libertatis/Makefile
+++ games/arx-libertatis/Makefile
@@ -24,7 +24,6 @@
 CMAKE_ARGS=	-DDATA_DIR=arx \
 		-DSTRICT_USE=ON \
 		-DBUILD_CRASHREPORTER=OFF
-CFLAGS_powerpc64+=	-mminimal-toc
 
 SUB_FILES=	pkg-message
 
@@ -42,4 +41,12 @@
 	${INSTALL_DATA} ${WRKSRC}/${f} ${STAGEDIR}${DOCSDIR}/
 .endfor
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+# this flag is needed for elfv1 but illegal for elfv2.
+# TODO the bogus OSVERSION value is a placeholder for testing.
+.if ${OSVERSION} < 9999999
+CFLAGS_powerpc64=	-mminimal-toc
+.endif
+
+.include <bsd.port.post.mk>
Index: math/flann/Makefile
===================================================================
--- math/flann/Makefile
+++ math/flann/Makefile
@@ -22,9 +22,15 @@
 
 PLIST_SUB=	SHL3=${DISTVERSION:C/-.*//} SHL2=${DISTVERSION:R}
 
-CFLAGS_powerpc64=	-mminimal-toc
-
 CMAKE_OFF=	BUILD_PYTHON_BINDINGS BUILD_MATLAB_BINDINGS BUILD_EXAMPLES BUILD_TESTS BUILD_DOC \
 		USE_OPENMP # OpenMP search is broken in cmake: https://gitlab.kitware.com/cmake/cmake/issues/17474
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+# this flag is needed for elfv1 but illegal for elfv2.
+# TODO the bogus OSVERSION value is a placeholder for testing.
+.if ${OSVERSION} < 9999999
+CFLAGS_powerpc64=	-mminimal-toc
+.endif
+
+.include <bsd.port.post.mk>
Index: math/pari/Makefile
===================================================================
--- math/pari/Makefile
+++ math/pari/Makefile
@@ -22,7 +22,6 @@
 USE_LDCONFIG=	yes
 USE_PERL5=	build
 HAS_CONFIGURE=	yes
-CFLAGS_powerpc64=	-mminimal-toc
 CONFIGURE_SCRIPT=	Configure
 CONFIGURE_ARGS=	--mandir=${MANPREFIX}/man/man1 \
 		--prefix=${PREFIX} \
@@ -76,4 +75,12 @@
 do-test-MPI-on:
 	@cd ${WRKSRC} && ${MAKE_CMD} test-parallel RUNTEST="mpirun -np 3"
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+# this flag is needed for elfv1 but illegal for elfv2.
+# TODO the bogus OSVERSION value is a placeholder for testing.
+.if ${OSVERSION} < 9999999
+CFLAGS_powerpc64=	-mminimal-toc
+.endif
+
+.include <bsd.port.post.mk>
Index: math/vtk6/Makefile
===================================================================
--- math/vtk6/Makefile
+++ math/vtk6/Makefile
@@ -27,7 +27,6 @@
 USES=		alias cmake jpeg localbase
 USE_LDCONFIG=	${PREFIX}/lib/vtk-${VTK_SHORT_VER}
 USE_XORG=	xt sm ice x11 xext
-CXXFLAGS_powerpc64=	-mminimal-toc
 
 VTK_SHORT_VER=	${PORTVERSION:R}
 PLIST_SUB+=	VER2=${VTK_SHORT_VER}
@@ -207,4 +206,12 @@
 CMAKE_ARGS+=	-DBUILD_DOCUMENTATION:BOOL=OFF
 .endif
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+# this flag is needed for elfv1 but illegal for elfv2.
+# TODO the bogus OSVERSION value is a placeholder for testing.
+.if ${OSVERSION} < 9999999
+CXXFLAGS_powerpc64=	-mminimal-toc
+.endif
+
+.include <bsd.port.post.mk>
Index: multimedia/gstreamer1-libav/Makefile
===================================================================
--- multimedia/gstreamer1-libav/Makefile
+++ multimedia/gstreamer1-libav/Makefile
@@ -26,7 +26,6 @@
 USE_GNOME=	glib20
 GNU_CONFIGURE=	yes
 INSTALL_TARGET=	install-strip
-CFLAGS_powerpc64=	-mminimal-toc
 
 OPTIONS_DEFINE=	FFMPEG
 OPTIONS_DEFAULT=FFMPEG
@@ -42,4 +41,12 @@
 	@${REINPLACE_CMD} -e 's|-Werror||g' \
 		${WRKSRC}/configure
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+# this flag is needed for elfv1 but illegal for elfv2.
+# TODO the bogus OSVERSION value is a placeholder for testing.
+.if ${OSVERSION} < 9999999
+CFLAGS_powerpc64=	-mminimal-toc
+.endif
+
+.include <bsd.port.post.mk>
Index: sysutils/cbsd/Makefile
===================================================================
--- sysutils/cbsd/Makefile
+++ sysutils/cbsd/Makefile
@@ -21,8 +21,6 @@
 USE_GITHUB=	yes
 USE_RC_SUBR=	cbsdd cbsdrsyncd cbsd-statsd-bhyve cbsd-statsd-hoster cbsd-statsd-jail
 
-CFLAGS_powerpc64=	-mminimal-toc
-
 SUB_FILES=	pkg-message pkg-deinstall
 
 CBSD_HOME?=	${PREFIX}/cbsd
@@ -51,4 +49,12 @@
 	@${MKDIR} ${STAGEDIR}${PREFIX}/libexec/bsdconfig
 	@${LN} -sf ${CBSD_HOME}/share/bsdconfig/cbsd ${STAGEDIR}${PREFIX}/libexec/bsdconfig/cbsd
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+# this flag is needed for elfv1 but illegal for elfv2.
+# TODO the bogus OSVERSION value is a placeholder for testing.
+.if ${OSVERSION} < 9999999
+CFLAGS_powerpc64=	-mminimal-toc
+.endif
+
+.include <bsd.port.post.mk>
Index: x11-toolkits/qt5-gui/Makefile
===================================================================
--- x11-toolkits/qt5-gui/Makefile
+++ x11-toolkits/qt5-gui/Makefile
@@ -73,8 +73,6 @@
 		xorg-fonts-truetype>0:x11-fonts/xorg-fonts-truetype
 .endif
 
-CFLAGS_powerpc64=	-mminimal-toc
-
 post-configure:
 .for d in src/tools/qvkgen src/gui ${MORE_WRKSRCS}
 	${MKDIR} ${WRKSRC}/${d}
@@ -102,4 +100,12 @@
 		${MAKE_ARGS} ${INSTALL_TARGET}
 .endfor
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+# this flag is needed for elfv1 but illegal for elfv2.
+# TODO the bogus OSVERSION value is a placeholder for testing.
+.if ${OSVERSION} < 9999999
+CFLAGS_powerpc64=	-mminimal-toc
+.endif
+
+.include <bsd.port.post.mk>