[libcxx-commits] [libcxx] [libcxx] Add necessary compile flags for targeting the GPU (PR #99333)

[Louis Dionne via libcxx-commits]

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@@ -491,6 +491,15 @@ include(HandleLibcxxFlags)
 # 'config-ix' use them during feature checks. It also adds them to both
 # 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'
 
+# Targeting the GPU requires a clang compiler and several extra flags.
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ldionne wrote:

Why does Clang require `-nogpulib`? Don't we already pass `-nodefaultlibs`?

Also, why `-flto`?

We should set this in the CMake caches -- we don't want to add any more target-specific flags in our CMake files, this is too messy.

https://github.com/llvm/llvm-project/pull/99333