[libcxx-commits] [libcxx] [libcxx] Add cache file for the GPU build (PR #99348)

[Louis Dionne via libcxx-commits]

================
@@ -0,0 +1,94 @@
+# Handle default arguments when done through the LLVM runtimes interface.
+foreach(target amdgcn-amd-amdhsa nvptx64-nvidia-cuda)
+  set(RUNTIMES_${target}_LIBCXX_ABI_VERSION 2 CACHE STRING "")
+  set(RUNTIMES_${target}_LIBCXX_CXX_ABI none CACHE STRING "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_SHARED OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_STATIC ON CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_FILESYSTEM OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_RANDOM_DEVICE OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_LOCALIZATION OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_UNICODE OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_WIDE_CHARACTERS OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_EXCEPTIONS OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_HAS_TERMINAL_AVAILABLE OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_RTTI OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_STATIC_ABI_LIBRARY ON CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_STATICALLY_LINK_ABI_IN_STATIC_LIBRARY ON CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_THREADS OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_MONOTONIC_CLOCK ON CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_INSTALL_LIBRARY ON CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_LIBC "llvm-libc" CACHE STRING "")
+  set(RUNTIMES_${target}_LIBCXX_USE_COMPILER_RT ON CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS ON CACHE BOOL "")
+
+  # Configuration options for libcxxabi.
+  set(RUNTIMES_${target}_LIBCXXABI_BAREMETAL ON CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXXABI_ENABLE_SHARED OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXXABI_ENABLE_EXCEPTIONS OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXXABI_ENABLE_THREADS OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS OFF CACHE BOOL "")
+  set(RUNTIMES_${target}_LIBCXXABI_USE_LLVM_UNWINDER OFF CACHE BOOL "")
+
+  # Target specific compile flags.
+  if(${target} MATCHES "^amdgcn")
+    set(RUNTIMES_${target}_LIBCXX_ADDITIONAL_COMPILE_FLAGS
+        "-nogpulib;-flto;-fconvergent-functions;-Xclang;-mcode-object-version=none" CACHE STRING "")
+    set(RUNTIMES_${target}_LIBCXXABI_ADDITIONAL_COMPILE_FLAGS
+        "-nogpulib;-flto;-fconvergent-functions;-Xclang;-mcode-object-version=none" CACHE STRING "")
+    set(RUNTIMES_${target}_CMAKE_REQUIRED_FLAGS "-nogpulib -nodefaultlibs" CACHE STRING "")
+  else()
+    set(RUNTIMES_${target}_LIBCXX_ADDITIONAL_COMPILE_FLAGS
+        "-nogpulib;-flto;-fconvergent-functions;--cuda-feature=+ptx63" CACHE STRING "")
+    set(RUNTIMES_${target}_LIBCXXABI_ADDITIONAL_COMPILE_FLAGS
+        "-nogpulib;-flto;-fconvergent-functions;--cuda-feature=+ptx63" CACHE STRING "")
+    set(RUNTIMES_${target}_CMAKE_REQUIRED_FLAGS
+        "-flto -nodefaultlibs -c -Wno-unused-command-line-argument" CACHE STRING "")
----------------
ldionne wrote:

```suggestion
    set(RUNTIMES_${target}_CMAKE_REQUIRED_FLAGS
        "-flto -nodefaultlibs -c" CACHE STRING "")
```

That flag shouldn't be necessary?

https://github.com/llvm/llvm-project/pull/99348