[Lldb-commits] [lldb] [LLDB][test] Update Makefile.rules to support Windows host+Linux target (PR #99266)

[Vladislav Dzhidzhoev via lldb-commits]

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@@ -456,21 +492,15 @@ ifeq (1, $(USE_SYSTEM_STDLIB))
         endif
         CXXFLAGS += -nostdlib++ -nostdinc++ -cxx-isystem $(SDKROOT)/usr/include/c++/v1
         LDFLAGS += -L$(SDKROOT)/usr/lib -Wl,-rpath,$(SDKROOT)/usr/lib -lc++
+    else
+        ifneq (,$(findstring clang,$(CC)))
+            # Force clang looking for the gcc's headers at specific rootfs folder.
+            CXXFLAGS += -stdlib=libstdc++ $(GCC_TOOLCHAIN_FLAGS)
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dzhidzhoev wrote:

> This still forces the usage of libstdc++ on windows, right? Could we just pass nothing here and let clang use its default?

Actually, it's ignored on Windows. We have some problems without that line during cross-compiling, but I think it's due to missing $(GCC_TOOLCHAIN_FLAGS) content, not stdlib selection.

https://github.com/llvm/llvm-project/pull/99266