Index: head/Mk/Uses/cargo.mk
===================================================================
--- head/Mk/Uses/cargo.mk
+++ head/Mk/Uses/cargo.mk
@@ -74,7 +74,7 @@
 RUSTFLAGS+=	${CFLAGS:M-mcpu=*:S/-mcpu=/-C target-cpu=/}
 .endif
 
-.if ${ARCH} == powerpc64
+.if defined(PPC_ABI) && ${PPC_ABI} == ELFv1
 USE_GCC?=	yes
 .endif
 
Index: head/Mk/Uses/php.mk
===================================================================
--- head/Mk/Uses/php.mk
+++ head/Mk/Uses/php.mk
@@ -159,7 +159,7 @@
 .    endif
 .  endif
 
-.if ${PHP_VER} == 74 && (${ARCH:Mmips*} || ${ARCH:Mpowerpc*} || ${ARCH} == sparc64)
+.if ${PHP_VER} == 74 && (${ARCH:Mmips*} || (${ARCH:Mpowerpc*} && !exists(/usr/bin/clang)) || ${ARCH} == sparc64)
 USE_GCC=	yes
 .endif
 
Index: head/Mk/Uses/qt-dist.mk
===================================================================
--- head/Mk/Uses/qt-dist.mk
+++ head/Mk/Uses/qt-dist.mk
@@ -171,7 +171,7 @@
 			${PORTSDIR}/devel/${_QT_RELNAME}/files/extrapatch-mkspecs_features_qt__module.prf \
 			${PORTSDIR}/devel/${_QT_RELNAME}/files/extrapatch-mkspecs_common_bsd_bsd.conf \
 			${PORTSDIR}/devel/${_QT_RELNAME}/files/extrapatch-mkspecs_freebsd-clang_qmake.conf
-.        if ${ARCH:Mmips*} || ${ARCH:Mpowerpc*} || ${ARCH} == sparc64
+.        if ${ARCH:Mmips*} || (${ARCH:Mpowerpc*} && !exists(/usr/bin/clang)) || ${ARCH} == sparc64
 _EXTRA_PATCHES_QT5+=	${PORTSDIR}/devel/${_QT_RELNAME}/files/extra-patch-mkspecs_common_g++-base.conf \
 			${PORTSDIR}/devel/${_QT_RELNAME}/files/extra-patch-mkspecs_common_gcc-base.conf \
 			${PORTSDIR}/devel/${_QT_RELNAME}/files/extrapatch-mkspecs_freebsd-g++_qmake.conf
Index: head/Mk/bsd.gecko.mk
===================================================================
--- head/Mk/bsd.gecko.mk
+++ head/Mk/bsd.gecko.mk
@@ -321,7 +321,6 @@
 .elif ${ARCH:Mpowerpc*}
 . if ${ARCH} == "powerpc64"
 MOZ_EXPORT+=	UNAME_m="${ARCH}"
-CFLAGS+=	-mminimal-toc
 . endif
 .elif ${ARCH} == "sparc64"
 # Work around miscompilation/mislinkage of the sCanonicalVTable hacks.
Index: head/Mk/bsd.port.mk
===================================================================
--- head/Mk/bsd.port.mk
+++ head/Mk/bsd.port.mk
@@ -1126,6 +1126,16 @@
 .endif
 _EXPORTED_VARS+=	ARCH
 
+.if ${ARCH} == powerpc64
+.  if !defined(PPC_ABI)
+PPC_ABI!=	${CC} -dM -E - < /dev/null | ${AWK} '/_CALL_ELF/{print "ELFv"$$3}'
+.    if ${PPC_ABI} != ELFv2
+PPC_ABI=	ELFv1
+.    endif
+.  endif
+_EXPORTED_VARS+=	PPC_ABI
+.endif
+
 # Get operating system versions for a cross build
 .if defined(CROSS_SYSROOT)
 .if !exists(${CROSS_SYSROOT}/usr/include/sys/param.h)