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build: require libc++ and clang headers #946

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Merged
merged 1 commit into from
Jul 29, 2025
Merged

build: require libc++ and clang headers #946

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35 changes: 18 additions & 17 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -89,21 +89,22 @@ endif()
find_package(LLVM REQUIRED CONFIG)
find_package(Clang REQUIRED CONFIG)

if (LLVM_ROOT)
set(LIBCXX_DIR "${LLVM_ROOT}/include/c++/v1/")
message(STATUS "LIBCXX_DIR: ${LIBCXX_DIR}")
if (NOT EXISTS "${LIBCXX_DIR}")
message(FATAL_ERROR
"LIBCXX_DIR (${LIBCXX_DIR}) does not exist.\n"
"LLVM_ROOT is set, but LIBCXX_DIR (/include/c++/v1) does not exist.\n")
endif()
set(STDLIB_INCLUDE_DIR "${LLVM_ROOT}/lib/clang/${Clang_VERSION_MAJOR}/include/")
message(STATUS "STDLIB_INCLUDE_DIR: ${STDLIB_INCLUDE_DIR}")
if (NOT EXISTS "${STDLIB_INCLUDE_DIR}")
message(FATAL_ERROR
"STDLIB_INCLUDE_DIR (${STDLIB_INCLUDE_DIR}) does not exist.\n"
"LLVM_ROOT is set, but STDLIB_INCLUDE_DIR (/lib/clang/${Clang_VERSION_MAJOR}/include) does not exist.\n")
endif()
set(LIBCXX_DIR "${LLVM_INCLUDE_DIR}/c++/v1" CACHE PATH
"Path to libc++ include directory")
message(STATUS "LIBCXX_DIR: ${LIBCXX_DIR}")
if (NOT EXISTS "${LIBCXX_DIR}")
message(FATAL_ERROR
"LIBCXX_DIR (${LIBCXX_DIR}) does not exist.\n"
"Please provide a LLVM with libc++ enabled\n")
endif()

set(STDLIB_INCLUDE_DIR "${LLVM_BINARY_DIR}/lib/clang/${Clang_VERSION_MAJOR}/include"
CACHE PATH "Path to the clang headers include directory")
message(STATUS "STDLIB_INCLUDE_DIR: ${STDLIB_INCLUDE_DIR}")
if (NOT EXISTS "${STDLIB_INCLUDE_DIR}")
message(FATAL_ERROR
"STDLIB_INCLUDE_DIR (${STDLIB_INCLUDE_DIR}) does not exist.\n"
"Missing clang headers\n")
endif()

list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_DIR}")
Expand Down Expand Up @@ -528,10 +529,10 @@ if (MRDOCS_INSTALL)
#-------------------------------------------------
# share
#-------------------------------------------------
install(DIRECTORY ${LIBCXX_DIR}
install(DIRECTORY ${LIBCXX_DIR}/
DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/mrdocs/headers/libcxx
FILES_MATCHING PATTERN "*")
install(DIRECTORY ${STDLIB_INCLUDE_DIR}
install(DIRECTORY ${STDLIB_INCLUDE_DIR}/
DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/mrdocs/headers/clang
FILES_MATCHING PATTERN "*")
install(DIRECTORY ${CMAKE_SOURCE_DIR}/share/mrdocs/headers/libc-stubs/
Expand Down
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