gcc: add llvm-gcc and llvm from trunk (does not successfully compile a target yet, but gets close)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18019 3c298f89-4303-0410-b956-a3cf2f4a3e73

toolchain/gcc/patches/llvm/300-libstdc++-pic.patch

@@ -0,0 +1,50 @@
+# DP: Build and install libstdc++_pic.a library.
+
+--- a/libstdc++-v3/src/Makefile.am
++++ b/libstdc++-v3/src/Makefile.am
+@@ -257,6 +257,12 @@ CXXLINK = $(LIBTOOL) --tag CXX --mode=li
+ 	  $(OPT_LDFLAGS) $(SECTION_LDFLAGS) $(AM_CXXFLAGS) $(LTLDFLAGS) -o $@
+ 
+ 
++install-exec-local:
++ifeq ($(enable_shared),yes)
++	$(AR) cru libstdc++_pic.a .libs/*.o $(top_builddir)/libsupc++/*.o
++	$(INSTALL_DATA) libstdc++_pic.a $(DESTDIR)$(toolexeclibdir)
++endif
++
+ # Added bits to build debug library.
+ if GLIBCXX_BUILD_DEBUG
+ all-local: build_debug
+--- a/libstdc++-v3/src/Makefile.in
++++ b/libstdc++-v3/src/Makefile.in
+@@ -657,7 +657,7 @@ info-am:
+ 
+ install-data-am: install-data-local
+ 
+-install-exec-am: install-toolexeclibLTLIBRARIES
++install-exec-am: install-toolexeclibLTLIBRARIES install-exec-local
+ 
+ install-info: install-info-am
+ 
+@@ -690,6 +690,7 @@ uninstall-am: uninstall-info-am uninstal
+ 	distclean-libtool distclean-tags distdir dvi dvi-am html \
+ 	html-am info info-am install install-am install-data \
+ 	install-data-am install-data-local install-exec \
++	install-exec-local \
+ 	install-exec-am install-info install-info-am install-man \
+ 	install-strip install-toolexeclibLTLIBRARIES installcheck \
+ 	installcheck-am installdirs maintainer-clean \
+@@ -799,6 +800,13 @@ build_debug: stamp-debug
+ install_debug:
+ 	(cd ${debugdir} && $(MAKE) \
+ 	toolexeclibdir=$(glibcxx_toolexeclibdir)/debug install)
++
++install-exec-local:
++ifeq ($(enable_shared),yes)
++	$(AR) cru libstdc++_pic.a *.o $(top_builddir)/libsupc++/*.o
++	$(INSTALL_DATA) libstdc++_pic.a $(DESTDIR)$(toolexeclibdir)
++endif
++
+ # Tell versions [3.59,3.63) of GNU make to not export all variables.
+ # Otherwise a system limit (for SysV at least) may be exceeded.
+ .NOEXPORT: