Index: Mk/Uses/fortran.mk
===================================================================
--- Mk/Uses/fortran.mk	(revision 537119)
+++ Mk/Uses/fortran.mk	(working copy)
@@ -27,10 +27,19 @@
 .endif
 .elif ${fortran_ARGS} == gfortran
 _GCC_VER=	${GCC_DEFAULT:S/.//}
-BUILD_DEPENDS+=	gfortran${_GCC_VER}:lang/gcc${_GCC_VER}
-RUN_DEPENDS+=	gfortran${_GCC_VER}:lang/gcc${_GCC_VER}
-F77=		gfortran${_GCC_VER}
-FC=		gfortran${_GCC_VER}
+# TODO the next line is necessary but insufficient
+_USE_GCC:=	${GCC_DEFAULT}
+V:=		${_USE_GCC:S/.//}
+. if ${V} == 10
+_GCC_PORT:=	gcc${V}-devel
+. else
+_GCC_PORT:=	gcc${V}
+. endif
+BUILD_DEPENDS+=	gfortran${V}:lang/gcc${_GCC_PORT}
+RUN_DEPENDS+=	gfortran${V}:lang/gcc${_GCC_PORT}
+F77=		gfortran${V}
+FC=		gfortran${V}
+.endif
 FFLAGS+=	-Wl,-rpath=${LOCALBASE}/lib/gcc${_GCC_VER}
 FCFLAGS+=	-Wl,-rpath=${LOCALBASE}/lib/gcc${_GCC_VER}
 LDFLAGS+=	-Wl,-rpath=${LOCALBASE}/lib/gcc${_GCC_VER} \