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CMake: Support using bundled libraries even if system libraries exist

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This commit is contained in:
TellowKrinkle
2023-04-16 02:46:42 -05:00
parent 5b10a80401
commit ade40650f5
3 changed files with 102 additions and 179 deletions
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29
CMake/CheckVendoringApproved.cmake
View File

@ -1,29 +0,0 @@
# When packaging Dolphin for an OS distribution, distro vendors usually prefer
# to limit vendored ("Externals") dependencies as much as possible, in favor of
# using system provided libraries. This modules provides an option to allow
# only specific vendored dependencies and error-out at configuration time for
# non-approved ones.
#
# Usage:
# $ cmake -D APPROVED_VENDORED_DEPENDENCIES="a;b;c;..."
#
# Unless the option is explicitly used, vendored dependencies control is
# disabled.
#
# If you want to disallow all vendored dependencies, put "none" in the approved
# dependencies list.
set(APPROVED_VENDORED_DEPENDENCIES "" CACHE STRING "\
Semicolon separated list of approved vendored dependencies. See docstring in \
CMake/CheckVendoringApproved.cmake.")
function(check_vendoring_approved dep)
if(APPROVED_VENDORED_DEPENDENCIES)
if(NOT dep IN_LIST APPROVED_VENDORED_DEPENDENCIES)
message(SEND_ERROR "\
Library ${dep} was not found systemwide and was not approved for vendoring. \
Vendored dependencies control is enabled. Add \"${dep}\" to the \
APPROVED_VENDORED_DEPENDENCIES list to bypass this error.")
endif()
endif()
endfunction()

75
CMake/DolphinLibraryTools.cmake
View File

@ -18,3 +18,78 @@ function(dolphin_make_imported_target_if_missing target lib)
add_library(${target} ALIAS _${lib})
endif()
endfunction()
function(dolphin_optional_system_library library)
string(TOUPPER ${library} upperlib)
set(USE_SYSTEM_${upperlib} "" CACHE STRING "Use system ${library} instead of bundled. ON - Always use system and fail if unavailable, OFF - Always use bundled, AUTO - Use system if available, otherwise use bundled, blank - Delegate to USE_SYSTEM_LIBS. Default is blank.")
if("${USE_SYSTEM_${upperlib}}" STREQUAL "")
if(APPROVED_VENDORED_DEPENDENCIES)
string(TOLOWER ${library} lowerlib)
if(lowerlib IN_LIST APPROVED_VENDORED_DEPENDENCIES)
set(RESOLVED_USE_SYSTEM_${upperlib} AUTO PARENT_SCOPE)
else()
set(RESOLVED_USE_SYSTEM_${upperlib} ON PARENT_SCOPE)
endif()
else()
set(RESOLVED_USE_SYSTEM_${upperlib} ${USE_SYSTEM_LIBS} PARENT_SCOPE)
endif()
else()
set(RESOLVED_USE_SYSTEM_${upperlib} ${USE_SYSTEM_${upperlib}} PARENT_SCOPE)
endif()
endfunction()
function(dolphin_add_bundled_library library bundled_path)
string(TOUPPER ${library} upperlib)
if (${RESOLVED_USE_SYSTEM_${upperlib}} STREQUAL "AUTO")
message(STATUS "No system ${library} was found. Using static ${library} from Externals.")
else()
message(STATUS "Using static ${library} from Externals")
endif()
if (NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${bundled_path}/CMakeLists.txt")
message(FATAL_ERROR "No bundled ${library} was found. Did you forget to checkout submodules?")
endif()
add_subdirectory(${bundled_path} EXCLUDE_FROM_ALL)
endfunction()
function(dolphin_find_optional_system_library library bundled_path)
dolphin_optional_system_library(${library})
string(TOUPPER ${library} upperlib)
if(RESOLVED_USE_SYSTEM_${upperlib})
find_package(${library} ${ARGN})
# Yay for cmake packages being inconsistent
if(DEFINED ${library}_FOUND)
set(prefix ${library})
else()
set(prefix ${upperlib})
endif()
if((NOT ${found}) AND (NOT ${RESOLVED_USE_SYSTEM_${upperlib}} STREQUAL "AUTO"))
message(FATAL_ERROR "No system ${library} was found. Please install it or set USE_SYSTEM_${upperlib} to AUTO or OFF.")
endif()
endif()
if(${prefix}_FOUND)
message(STATUS "Using system ${library}")
set(${prefix}_TYPE "System" PARENT_SCOPE)
else()
dolphin_add_bundled_library(${library} ${bundled_path})
set(${prefix}_TYPE "Bundled" PARENT_SCOPE)
endif()
endfunction()
function(dolphin_find_optional_system_library_pkgconfig library search alias bundled_path)
dolphin_optional_system_library(${library})
string(TOUPPER ${library} upperlib)
if(RESOLVED_USE_SYSTEM_${upperlib})
pkg_check_modules(${library} ${search} ${ARGN} IMPORTED_TARGET)
if((NOT ${library}_FOUND) AND (NOT ${RESOLVED_USE_SYSTEM_${upperlib}} STREQUAL "AUTO"))
message(FATAL_ERROR "No system ${library} was found. Please install it or set USE_SYSTEM_${upperlib} to AUTO or OFF.")
endif()
endif()
if(${library}_FOUND)
message(STATUS "Using system ${library}")
dolphin_alias_library(${alias} PkgConfig::${library})
set(${library}_TYPE "System" PARENT_SCOPE)
else()
dolphin_add_bundled_library(${library} ${bundled_path})
set(${library}_TYPE "Bundled" PARENT_SCOPE)
endif()
endfunction()