Merge pull request #1725 from demin-han/master

Add LLVM_EXTRA_CONFIGURE_FLAGS

Author: kito-cheng

Makefile.in

@@ -1158,7 +1158,8 @@ stamps/build-llvm-linux: $(LLVM_SRCDIR) $(LLVM_SRC_GIT) $(BINUTILS_SRCDIR) $(BIN
 	    -DLLVM_RUNTIME_TARGETS=$(call make_tuple,$(XLEN),linux-gnu) \
 	    -DLLVM_INSTALL_TOOLCHAIN_ONLY=On \
 	    -DLLVM_BINUTILS_INCDIR=$(BINUTILS_SRCDIR)/include \
-	    -DLLVM_PARALLEL_LINK_JOBS=4
+	    -DLLVM_PARALLEL_LINK_JOBS=4 \
+	    $(LLVM_EXTRA_CONFIGURE_FLAGS)
 	$(MAKE) -C $(notdir $@)
 	$(MAKE) -C $(notdir $@) install
 	# Build shared/static OpenMP libraries on RV64.
@@ -1220,7 +1221,8 @@ stamps/build-llvm-newlib: $(LLVM_SRCDIR) $(LLVM_SRC_GIT) $(BINUTILS_SRCDIR) $(BI
 	    -DLLVM_DEFAULT_TARGET_TRIPLE="$(NEWLIB_TUPLE)" \
 	    -DLLVM_INSTALL_TOOLCHAIN_ONLY=On \
 	    -DLLVM_BINUTILS_INCDIR=$(BINUTILS_SRCDIR)/include \
-	    -DLLVM_PARALLEL_LINK_JOBS=4
+	    -DLLVM_PARALLEL_LINK_JOBS=4 \
+	    $(LLVM_EXTRA_CONFIGURE_FLAGS)
 	$(MAKE) -C $(notdir $@)
 	$(MAKE) -C $(notdir $@) install
 	cp $(notdir $@)/lib/LLVMgold.$(SHARED_LIB_SUFFIX) $(INSTALL_DIR)/lib

README.md

@@ -140,7 +140,7 @@ 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_TARGET_FLAGS_EXTRA, NEWLIB_TARGET_FLAGS_EXTRA```.
+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_TARGET_FLAGS_EXTRA, NEWLIB_TARGET_FLAGS_EXTRA, LLVM_EXTRA_CONFIGURE_FLAGS```.
 Example: ```GCC_EXTRA_CONFIGURE_FLAGS=--with-gmp=/opt/gmp make linux```
 
 #### Set default ISA spec version