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authorChuck Cranor <chuck@ece.cmu.edu>2018-12-07 14:48:17 (GMT)
committerBrad King <brad.king@kitware.com>2019-01-21 16:14:08 (GMT)
commit5990ecb74133e1a9c885fc0ea62896b501d37fef (patch)
tree9f74108839347d376a93224632fff228ed908021 /Source
parentd751d2d2ed277c1bfb2882fd90b377983ab4700f (diff)
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Compute implicit include directories from compiler output
- CMakeParseImplicitIncludeInfo.cmake: new parser that extracts the compiler's include path from verbose output. If the parser cannot parse the output, we fall back to the old behavior. On osx we skip over framework directories (handled elsewhere). - CMakeDetermineCompilerABI.cmake: - use verbose flag in try_compile for ${src} - use new cmake_parse_implicit_include_info() to attempt extract implicit include directory path and if successful set CMAKE_${LANG}_IMPLICIT_INCLUDE_DIRECTORIES - CMakeCCompiler.cmake.in and CMakeCXXCompiler.cmake.in - preserve CMAKE_${LANG}_IMPLICIT_INCLUDE_DIRECTORIES value between runs in the same way CMAKE_${LANG}_IMPLICIT_LINK_DIRECTORIES is preserved - Tests/RunCMake/ParseImplicitIncludeInfo: tests for parse based on the older Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in. The test runs a set of verbose compiler outputs collected from various machines through the parser and checks the results. New compiler files can be added by dropping input/output files in the ParseImplicitIncludeInfo/data subdirectory and then adding the new set of files to the ${targets} list in ParseImplicitIncludeInfo.cmake. There is a helper CMakeLists.txt in ParseImplicitIncludeInfo/data that can help with the generation of test input files. NOTE: the standard cmake pre-commit hook rejects verbose compiler output with trailing spaces... you have to manually edit them out. This shouldn't impact the test. Note that both the parser and the test code can use CMAKE_${LANG}_COMPILER_* variables such as ${CMAKE_CXX_COMPILER_ID} to decide how to parse verbose compiler output. For the test code, this requires us to save the variables values in the test input files. Fixes: #16291
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