melonDS/cmake/FixInterfaceIncludes.cmake

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# The entire codebase quite reasonably does things like #include <SDL2/SDL.h> or <epoxy/gl.h>
# CMake apparently doesn't think you should be doing this, so just includes $PREFIX/include/packagename for a given
# package as include directories when using `target_link_libraries` with an imported target, this hacky function fixes
# that up so includes can keep working as they always did but we can still use fancy imported targets.
# This is stupid.
function(fix_interface_includes)
foreach (target ${ARGN})
set(NEW_DIRS)
get_target_property(DIRS "${target}" INTERFACE_INCLUDE_DIRECTORIES)
if (NOT DIRS)
continue()
endif()
foreach (DIR ${DIRS})
get_filename_component(PARENT_DIR "${DIR}" DIRECTORY)
if (PARENT_DIR MATCHES "include$")
list(APPEND NEW_DIRS "${PARENT_DIR}")
endif()
# HACK
# The libarchive pkg-config file in MSYS2 seems to include a UNIX-style path for its
# include directory and CMake doesn't like that.
if (WIN32 AND MINGW AND target STREQUAL PkgConfig::LibArchive)
list(FILTER DIRS EXCLUDE REGEX "^/[^.]+64/.*")
endif()
endforeach()
list(APPEND DIRS ${NEW_DIRS})
set_target_properties("${target}" PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${DIRS}")
endforeach()
endfunction()