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[libc] Deprecate LLVM_ENABLE_PROJECTS in favor of LLVM_ENABLE_RUNTIMES. #117265

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Merged
merged 1 commit into from
Dec 2, 2024
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[libc] Deprecate LLVM_ENABLE_PROJECTS in favor of LLVM_ENABLE_RUNTIMES. #117265

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7 changes: 7 additions & 0 deletions llvm/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -150,6 +150,13 @@ if ("flang" IN_LIST LLVM_ENABLE_PROJECTS)
endif()
endif()

if ("libc" IN_LIST LLVM_ENABLE_PROJECTS)
message(WARNING "Using LLVM_ENABLE_PROJECTS=libc is deprecated now, and will "
"become a fatal error in the LLVM 21 release. Please use "
"-DLLVM_ENABLE_RUNTIMES=libc or see the instructions at "
"https://libc.llvm.org/ for building the runtimes.")
endif()

# Select the runtimes to build
#
# As we migrate runtimes to using the bootstrapping build, the set of default runtimes
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