Merge pull request #1187 from mga-sc/master

[GCC]: Pass extra flags to gcc build.

Author: kito-cheng

Makefile.in

@@ -420,6 +420,7 @@ stamps/build-gcc-linux-stage1: $(GCC_SRCDIR) $(GCC_SRC_GIT) stamps/build-binutil
 		$(WITH_ARCH) \
 		$(WITH_TUNE) \
 		$(WITH_ISA_SPEC) \
+		$(GCC_EXTRA_CONFIGURE_FLAGS) \
 		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET)" \
 		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)"
 	$(MAKE) -C $(notdir $@) inhibit-libc=true all-gcc
@@ -455,6 +456,7 @@ stamps/build-gcc-linux-stage2: $(GCC_SRCDIR) $(GCC_SRC_GIT) $(addprefix stamps/b
 		$(WITH_ARCH) \
 		$(WITH_TUNE) \
 		$(WITH_ISA_SPEC) \
+		$(GCC_EXTRA_CONFIGURE_FLAGS) \
 		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET)" \
 		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)"
 	$(MAKE) -C $(notdir $@)
@@ -509,6 +511,7 @@ stamps/build-gcc-linux-native: $(GCC_SRCDIR) $(GCC_SRC_GIT) stamps/build-gcc-lin
 		$(WITH_ARCH) \
 		$(WITH_TUNE) \
 		$(WITH_ISA_SPEC) \
+		$(GCC_EXTRA_CONFIGURE_FLAGS) \
 	$(MAKE) -C $(notdir $@)
 	$(MAKE) -C $(notdir $@) install
 	cp -a $(INSTALL_DIR)/$(LINUX_TUPLE)/lib* $(SYSROOT)
@@ -587,6 +590,7 @@ stamps/build-gcc-newlib-stage1: $(GCC_SRCDIR) $(GCC_SRC_GIT) stamps/build-binuti
 		$(WITH_ARCH) \
 		$(WITH_TUNE) \
 		$(WITH_ISA_SPEC) \
+		$(GCC_EXTRA_CONFIGURE_FLAGS) \
 		CFLAGS_FOR_TARGET="-Os $(CFLAGS_FOR_TARGET)" \
 		CXXFLAGS_FOR_TARGET="-Os $(CXXFLAGS_FOR_TARGET)"
 	$(MAKE) -C $(notdir $@) all-gcc
@@ -687,6 +691,7 @@ stamps/build-gcc-newlib-stage2: $(GCC_SRCDIR) $(GCC_SRC_GIT) stamps/build-newlib
 		$(WITH_ARCH) \
 		$(WITH_TUNE) \
 		$(WITH_ISA_SPEC) \
+		$(GCC_EXTRA_CONFIGURE_FLAGS) \
 		CFLAGS_FOR_TARGET="-Os $(CFLAGS_FOR_TARGET)" \
 		CXXFLAGS_FOR_TARGET="-Os $(CXXFLAGS_FOR_TARGET)"
 	$(MAKE) -C $(notdir $@)
@@ -749,6 +754,7 @@ stamps/build-gcc-musl-stage1: $(GCC_SRCDIR) $(GCC_SRC_GIT) stamps/build-binutils
 		$(WITH_ARCH) \
 		$(WITH_TUNE) \
 		$(WITH_ISA_SPEC) \
+		$(GCC_EXTRA_CONFIGURE_FLAGS) \
 		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET)" \
 		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)"
 	$(MAKE) -C $(notdir $@) inhibit-libc=true all-gcc
@@ -817,6 +823,7 @@ stamps/build-gcc-musl-stage2: $(GCC_SRCDIR) $(GCC_SRC_GIT) stamps/build-musl-lin
 		$(WITH_ARCH) \
 		$(WITH_TUNE) \
 		$(WITH_ISA_SPEC) \
+		$(GCC_EXTRA_CONFIGURE_FLAGS) \
 		CFLAGS_FOR_TARGET="-O2 $(CFLAGS_FOR_TARGET)" \
 		CXXFLAGS_FOR_TARGET="-O2 $(CXXFLAGS_FOR_TARGET)"
 	$(MAKE) -C $(notdir $@)

README.md

@@ -137,6 +137,9 @@ devtoolset-7 works.
 There are a number of additional options that may be passed to
 configure.  See './configure --help' for more details.
 
+Also you can define extra flags to pass to specific projects: ```BINUTILS_NATIVE_FLAGS_EXTRA, BINUTILS_TARGET_FLAGS_EXTRA, GCC_EXTRA_CONFIGURE_FLAGS, GDB_NATIVE_FLAGS_EXTRA, GDB_TARGET_FLAGS_EXTRA, GLIBC_NATIVE_FLAGS_EXTRA, GLIBC_TARGET_FLAGS_EXTRA```.
+Example: ```GCC_EXTRA_CONFIGURE_FLAGS=--with-gmp=/opt/gmp make linux```
+
 #### Set default ISA spec version
 
 `--with-isa-spec=` can specify the default version of the RISC-V Unprivileged