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cmake: Disable modules if clang-scan-deps is missing

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clang ships the clang-scan-deps tool separately from the compiler, making it possible
that the clang compiler supports modules but cannot be used by CMake for VulkanHppModule.

The straightforward solution is to, when using clang, check that the scan deps tools was
located. This prevents people who are using clang but not the modules from being unable
to use Vulkan-Headers when the clang-scan-deps tools is missing.
This commit is contained in:
Charles Giessen 2024-07-16 00:53:45 -05:00 • committed by Charles Giessen
parent fc6c06ac52
commit b379292b2a
1 changed files with 4 additions and 1 deletions
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5
CMakeLists.txt
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@ -44,7 +44,10 @@ target_include_directories(Vulkan-Headers INTERFACE $<BUILD_INTERFACE:${CMAKE_CU
if (MSVC AND (MSVC_VERSION GREATER_EQUAL "1941") OR
# clang-cl doesn't currently support modules
(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "16.0" AND (NOT CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES "MSVC")) OR
(CMAKE_CXX_COMPILER_ID STREQUAL "Clang"
AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "16.0"
AND (NOT CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES "MSVC")
AND (NOT CMAKE_CXX_COMPILER_CLANG_SCAN_DEPS STREQUAL CMAKE_CXX_COMPILER_CLANG_SCAN_DEPS-NOTFOUND)) OR
(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "14.0"))
set(COMPILER_SUPPORTS_CXX_MODULES TRUE)
endif()