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GCC: add rules for scanning C++ module dependencies

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Ben Boeckel
2023-09-21 09:41:26 -04:00
parent 8030dd0986
commit 4f0410959e
1 changed files with 21 additions and 0 deletions
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21
Modules/Compiler/GNU-CXX.cmake
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@@ -72,3 +72,24 @@ elseif(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 8.0)
endif()
__compiler_check_default_language_standard(CXX 3.4 98 6.0 14 11.1 17)
if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 14.0)
string(CONCAT CMAKE_EXPERIMENTAL_CXX_SCANDEP_SOURCE
"<CMAKE_CXX_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -E -x c++ <SOURCE>"
" -MT <DYNDEP_FILE> -MD -MF <DEP_FILE>"
" -fmodules-ts -fdeps-file=<DYNDEP_FILE> -fdeps-target=<OBJECT> -fdeps-format=p1689r5"
" -o <PREPROCESSED_SOURCE>")
set(CMAKE_EXPERIMENTAL_CXX_MODULE_MAP_FORMAT "gcc")
string(CONCAT CMAKE_EXPERIMENTAL_CXX_MODULE_MAP_FLAG
# Turn on modules.
"-fmodules-ts"
# Read the module mapper file.
" -fmodule-mapper=<MODULE_MAP_FILE>"
# Make sure dependency tracking is enabled (missing from `try_*`).
" -MD"
# Suppress `CXX_MODULES +=` from generated depfile snippets.
" -fdeps-format=p1689r5"
# Force C++ as a language.
" -x c++")
set(CMAKE_EXPERIMENTAL_CXX_MODULE_BMI_ONLY_FLAG "-fmodule-only")
endif()