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Index: Mk/bsd.gcc.mk
===================================================================
--- Mk/bsd.gcc.mk
+++ Mk/bsd.gcc.mk
@@ -17,13 +17,24 @@
# do so by specifying USE_GCC=X.Y+ which requests at least GCC version
# X.Y. To request a specific version omit the trailing + sign.
#
+# Optional comma-separated arguments may be specified after the version
+# specifier. The following arguments are supported:
+# build add GCC to BUILD_DEPENDS
+# run add GCC to RUN_DEPENDS
+# if no arguments are specified, GCC is added to BUILD_DEPENDS and RUN_DEPENDS.
+#
+# USE_GCC=build and USE_GCC=run are aliases to yes:build, yes:run, respectively
+#
# Examples:
# USE_GCC= yes # port requires a current version of GCC
# # as defined in bsd.default-versions.mk.
# USE_GCC= any # port requires GCC 4.2 or later.
# USE_GCC= 6+ # port requires GCC 6 or later.
# USE_GCC= 4.9 # port requires GCC 4.9.
-#
+# USE_GCC= 4.9:build # port requires GCC 4.9 at build-time only.
+# USE_GCC= build # port requires a current version of GCC at
+# # build-time only.
+#
# If you are wondering what your port exactly does, use "make test-gcc"
# to see some debugging.
#
@@ -49,6 +60,43 @@
# No configurable parts below this. ####################################
#
+# Alias {build,run} -> yes:{build,run}
+.if ${USE_GCC} == build || ${USE_GCC} == run
+USE_GCC:= yes:${USE_GCC}
+.endif
+
+# Split args
+.if defined(USE_GCC)
+__USE_GCC:= ${USE_GCC:C/\:.*//}
+_USE_GCC_ARGS:= ${USE_GCC:C/^[^\:]*(\:|\$)//:S/,/ /g}
+USE_GCC= ${__USE_GCC}
+.endif # defined(USE_GCC)
+
+# Make sure that no dependency or some other environment variable
+# pollutes the build/run dependency detection
+.undef _USE_GCC_BUILD_DEP
+.undef _USE_GCC_RUN_DEP
+.if ${_USE_GCC_ARGS:Mbuild}
+_USE_GCC_BUILD_DEP= yes
+_USE_GCC_ARGS:= ${_USE_GCC_ARGS:Nbuild}
+.endif
+.if ${_USE_GCC_ARGS:Mrun}
+_USE_GCC_RUN_DEP= yes
+_USE_GCC_ARGS:= ${_USE_GCC_ARGS:Nrun}
+.endif
+
+.if !empty(_USE_GCC_ARGS)
+. error bad target specification in USE_GCC. Only build, and run are supported.
+.endif
+
+# The port does not specify a build, run or test dependency, assume build and
+# test are required.
+.if !defined(_USE_GCC_BUILD_DEP) && !defined(_USE_GCC_RUN_DEP) && \
+ !defined(USE_GCC_NO_DEPENDS)
+_USE_GCC_BUILD_DEP= yes
+_USE_GCC_RUN_DEP= yes
+.endif
+
.if defined(USE_GCC) && ${USE_GCC} == yes
USE_GCC= ${GCC_DEFAULT}+
.endif
@@ -170,8 +218,12 @@
.undef V
.if defined(_GCC_PORT_DEPENDS)
+. if defined(_USE_GCC_BUILD_DEP)
BUILD_DEPENDS+= ${_GCC_PORT_DEPENDS}:lang/${_GCC_PORT}
+. endif
+. if defined(_USE_GCC_RUN_DEP)
RUN_DEPENDS+= ${_GCC_PORT_DEPENDS}:lang/${_GCC_PORT}
+. endif
# Later GCC ports already depend on binutils; make sure whatever we
# build leverages this as well.
USE_BINUTILS= yes
@@ -185,11 +237,20 @@
@echo "IGNORE: ${IGNORE}"
.else
.if defined(USE_GCC)
+.if defined(_USE_GCC_ARGS)
+ @echo "ARGS: ${_USE_GCC_ARGS}"
+.endif
.if defined(_GCC_ORLATER)
@echo Port can use later versions.
.else
@echo Port cannot use later versions.
.endif
+.if defined(_USE_GCC_BUILD_DEP)
+ @echo ${_GCC_PORT_DEPENDS}:lang/${_GCC_PORT} will be added to BUILD_DEPENDS.
+.endif
+.if defined(_USE_GCC_RUN_DEP)
+ @echo ${_GCC_PORT_DEPENDS}:lang/${_GCC_PORT} will be added to RUN_DEPENDS.
+.endif
.for v in ${GCCVERSIONS}
@echo -n "GCC version: ${_GCCVERSION_${v}_V} "
.if defined(_GCC_FOUND${v})

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