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[libc] Add an option to make libc only build the libc-hdrgen tool

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The `libc-hdergen` tool is required for cross-builds, however some cases
can cause issues when configuring this build. This patch adds an
ovveride option `LIBC_HDRGEN_ONLY` to allow us to retain the old
(incorrect) behaviour where `libc` would not build with any other
runtimes enabled.

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D151155
This commit is contained in:
Joseph Huber
2023-05-22 16:00:41 -05:00
parent 52bc4b16cb
commit 4fafa39b76
1 changed files with 3 additions and 1 deletions
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4
libc/CMakeLists.txt
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@@ -28,7 +28,9 @@ if(LLVM_LIBC_FULL_BUILD OR LIBC_GPU_BUILD OR LIBC_GPU_ARCHITECTURES)
endif()
endif()
if("libc" IN_LIST LLVM_ENABLE_RUNTIMES AND NOT LLVM_RUNTIMES_BUILD)
option(LIBC_HDRGEN_ONLY "Only build the 'libc-hdrgen' executable" OFF)
if(("libc" IN_LIST LLVM_ENABLE_RUNTIMES AND NOT LLVM_RUNTIMES_BUILD) OR
LIBC_HDRGEN_ONLY)
# When libc is build as part of the runtimes/bootstrap build's CMake run, we
# only need to build the host tools to build the libc. So, we just do enough
# to build libc-hdrgen and return.