diff options
Diffstat (limited to 'cmake')
-rw-r--r-- | cmake/Modules/FindPrefixFromConfig.cmake | 32 | ||||
-rw-r--r-- | cmake/Modules/GNUInstallPackageDir.cmake | 33 |
2 files changed, 55 insertions, 10 deletions
diff --git a/cmake/Modules/FindPrefixFromConfig.cmake b/cmake/Modules/FindPrefixFromConfig.cmake index aa9fb0d03413..c583a65e6738 100644 --- a/cmake/Modules/FindPrefixFromConfig.cmake +++ b/cmake/Modules/FindPrefixFromConfig.cmake @@ -26,16 +26,28 @@ # Path from the prefix to the config file, a relative path which we wish to # go up and out from to find the prefix directory. function(find_prefix_from_config out_var prefix_var path_to_leave) - set(config_code - "# Compute the installation prefix from this LLVMConfig.cmake file location." - "get_filename_component(${prefix_var} \"\${CMAKE_CURRENT_LIST_FILE}\" PATH)") - # Construct the proper number of get_filename_component(... PATH) - # calls to compute the installation prefix. - string(REGEX REPLACE "/" ";" _count "${path_to_leave}") - foreach(p ${_count}) - list(APPEND config_code - "get_filename_component(${prefix_var} \"\${${prefix_var}}\" PATH)") - endforeach(p) + if(IS_ABSOLUTE "${path_to_leave}") + # Because the path is absolute, we don't care about `path_to_leave` + # because we can just "jump" to the absolute path rather than work + # our way there relatively. + set(config_code + "# Installation prefix is fixed absolute path" + "set(${prefix_var} \"${CMAKE_INSTALL_PREFIX}\"") + else() + # `path_to_leave` is relative. Relative to what? The install prefix. + # We therefore go up enough parent directories to get back to the + # install prefix, and avoid hard-coding any absolute paths. + set(config_code + "# Compute the installation prefix from this LLVMConfig.cmake file location." + "get_filename_component(${prefix_var} \"\${CMAKE_CURRENT_LIST_FILE}\" PATH)") + # Construct the proper number of get_filename_component(... PATH) + # calls to compute the installation prefix. + string(REGEX REPLACE "/" ";" _count "${path_to_leave}") + foreach(p ${_count}) + list(APPEND config_code + "get_filename_component(${prefix_var} \"\${${prefix_var}}\" PATH)") + endforeach(p) + endif() string(REPLACE ";" "\n" config_code "${config_code}") set("${out_var}" "${config_code}" PARENT_SCOPE) endfunction() diff --git a/cmake/Modules/GNUInstallPackageDir.cmake b/cmake/Modules/GNUInstallPackageDir.cmake new file mode 100644 index 000000000000..e4a058e68f4f --- /dev/null +++ b/cmake/Modules/GNUInstallPackageDir.cmake @@ -0,0 +1,33 @@ +# Mimick `GNUInstallDirs` for one more install directory, the one where +# project's installed cmake subdirs go. + +# These functions are internal functions vendored in from GNUInstallDirs (with +# new names), so we don't depend on unstable implementation details. They are +# also simplified to only handle the cases we need. +# +# The purpose would appear to be making `CACHE PATH` vars in a way that +# bypasses the legacy oddity that `-D<PATH>` gets canonicalized, despite +# non-canonical `CACHE PATH`s being perfectly valid. + +macro(_GNUInstallPackageDir_cache_convert_to_path var description) + get_property(_GNUInstallPackageDir_cache_type CACHE ${var} PROPERTY TYPE) + if(_GNUInstallPackageDir_cache_type STREQUAL "UNINITIALIZED") + file(TO_CMAKE_PATH "${${var}}" _GNUInstallPackageDir_cmakepath) + set_property(CACHE ${var} PROPERTY TYPE PATH) + set_property(CACHE ${var} PROPERTY VALUE "${_GNUInstallPackageDir_cmakepath}") + set_property(CACHE ${var} PROPERTY HELPSTRING "${description}") + unset(_GNUInstallPackageDir_cmakepath) + endif() + unset(_GNUInstallPackageDir_cache_type) +endmacro() + +# Create a cache variable with default for a path. +macro(_GNUInstallPackageDir_cache_path var default description) + if(NOT DEFINED ${var}) + set(${var} "${default}" CACHE PATH "${description}") + endif() + _GNUInstallPackageDir_cache_convert_to_path("${var}" "${description}") +endmacro() + +_GNUInstallPackageDir_cache_path(CMAKE_INSTALL_PACKAGEDIR "lib${LLVM_LIBDIR_SUFFIX}/cmake" + "Directories containing installed CMake modules (lib/cmake)") |