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[OpenMP] Fix runtimes default build #149871

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Merged
merged 2 commits into from
Jul 25, 2025
+10 −2
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[OpenMP] Fix runtimes default build #149871

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[OpenMP] default build fix
Meinersbur Jul 21, 2025
9fce817
Apply change suggested by @jhuber6
Meinersbur Jul 22, 2025
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2 changes: 1 addition & 1 deletion openmp/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -115,7 +115,7 @@ option(OPENMP_ENABLE_LIBOMPTARGET "Enable building libomptarget for offloading."
option(OPENMP_ENABLE_LIBOMP_PROFILING "Enable time profiling for libomp." OFF)

# Header install location
if(${OPENMP_STANDALONE_BUILD})
if(NOT LLVM_TREE_AVAILABLE)
set(LIBOMP_HEADERS_INSTALL_PATH "${CMAKE_INSTALL_INCLUDEDIR}")
else()
include(GetClangResourceDir)
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2 changes: 1 addition & 1 deletion openmp/runtime/src/CMakeLists.txt
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Expand Up @@ -11,7 +11,7 @@
include(ExtendPath)

# The generated headers will be placed in clang's resource directory if present.
if(OPENMP_STANDALONE_BUILD OR NOT LLVM_RUNTIMES_BUILD)
if(NOT LLVM_TREE_AVAILABLE)
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When building openmp as llvm project, LLVM_TREE_AVAILABLE is undefined, so the wrong branch will be used

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@Meinersbur Meinersbur Jul 29, 2025 •
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I only considered the standalone build when LLVM_TREE_AVAILABLE being undefined just means means the LLVM tree is indeed not available. Will create a fix.

Note that that build mode is deprecated. #124014.

set(LIBOMP_HEADERS_INTDIR ${CMAKE_CURRENT_BINARY_DIR})
else()
set(LIBOMP_HEADERS_INTDIR ${LLVM_BINARY_DIR}/${LIBOMP_HEADERS_INSTALL_PATH})
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8 changes: 8 additions & 0 deletions runtimes/CMakeLists.txt
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Expand Up @@ -92,6 +92,14 @@ include(LLVMCheckCompilerLinkerFlag)
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)


# Determine whether we are in the runtimes/runtimes-bins directory of a
# bootstrap build.
set(LLVM_TREE_AVAILABLE OFF)
if (LLVM_LIBRARY_OUTPUT_INTDIR AND LLVM_RUNTIME_OUTPUT_INTDIR AND PACKAGE_VERSION)
set(LLVM_TREE_AVAILABLE ON)
endif()

# CMake omits default compiler include paths, but in runtimes build, we use
# -nostdinc and -nostdinc++ and control include paths manually so this behavior
# is undesirable. Filtering CMAKE_{LANG}_IMPLICIT_INCLUDE_DIRECTORIES to remove
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