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[OpenMP] Fix LLVM_ENABLE_PROJECTS=openmp build (#151117)

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Set LLVM_TREE_AVAILABLE when not defined after #149871. In particular,
the LLVM build tree is obviously available with
`add_subdirectory(openmp)` from the LLVM build tree itself. Note that
this build mode is deprecated since #136314.
This commit is contained in:
Michael Kruse
2025-08-05 13:42:46 +02:00
committed by GitHub
parent 52b7b22cfa
commit 9b2b5bf8cd
1 changed files with 11 additions and 0 deletions
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11
openmp/CMakeLists.txt
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@@ -21,6 +21,8 @@ endif()
include(GNUInstallDirs)
if (OPENMP_STANDALONE_BUILD)
set(LLVM_TREE_AVAILABLE False)
# CMAKE_BUILD_TYPE was not set, default to Release.
if (NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE Release)
@@ -48,6 +50,15 @@ if (OPENMP_STANDALONE_BUILD)
set(CMAKE_CXX_STANDARD_REQUIRED NO)
set(CMAKE_CXX_EXTENSIONS NO)
else()
# Usually <llvm-project>/runtimes/CMakeLists.txt sets LLVM_TREE_AVAILABLE and
# we assume it is not available otherwise. The exception is that we are in an
# LLVM_ENABLE_PROJECTS=openmp build, the LLVM tree is actually available.
# Note that this build mode has been deprecated.
# See https://github.com/llvm/llvm-project/issues/124014
if (NOT LLVM_RUNTIMES_BUILD AND "openmp" IN_LIST LLVM_ENABLE_PROJECTS)
set(LLVM_TREE_AVAILABLE True)
endif ()
set(OPENMP_ENABLE_WERROR ${LLVM_ENABLE_WERROR})
# When building in tree we install the runtime according to the LLVM settings.