zdoom-macos-deps/deps/cmake/share/cmake-3.25/Modules/Platform/Linux.cmake
2023-01-10 16:43:43 +02:00

98 lines
4.3 KiB
CMake

set(LINUX 1)
set(CMAKE_DL_LIBS "dl")
set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG "-Wl,-rpath,")
set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG_SEP ":")
set(CMAKE_SHARED_LIBRARY_RPATH_ORIGIN_TOKEN "\$ORIGIN")
set(CMAKE_SHARED_LIBRARY_RPATH_LINK_C_FLAG "-Wl,-rpath-link,")
set(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-Wl,-soname,")
set(CMAKE_EXE_EXPORTS_C_FLAG "-Wl,--export-dynamic")
# Shared libraries with no builtin soname may not be linked safely by
# specifying the file path.
set(CMAKE_PLATFORM_USES_PATH_WHEN_NO_SONAME 1)
# Initialize C link type selection flags. These flags are used when
# building a shared library, shared module, or executable that links
# to other libraries to select whether to use the static or shared
# versions of the libraries.
foreach(type SHARED_LIBRARY SHARED_MODULE EXE)
set(CMAKE_${type}_LINK_STATIC_C_FLAGS "-Wl,-Bstatic")
set(CMAKE_${type}_LINK_DYNAMIC_C_FLAGS "-Wl,-Bdynamic")
endforeach()
# Features for LINK_LIBRARY generator expression
## check linker capabilities
if(NOT DEFINED _CMAKE_LINKER_PUSHPOP_STATE_SUPPORTED)
execute_process(COMMAND "${CMAKE_LINKER}" --help
OUTPUT_VARIABLE __linker_help
ERROR_VARIABLE __linker_help)
if(__linker_help MATCHES "--push-state" AND __linker_help MATCHES "--pop-state")
set(_CMAKE_LINKER_PUSHPOP_STATE_SUPPORTED TRUE CACHE INTERNAL "linker supports push/pop state")
else()
set(_CMAKE_LINKER_PUSHPOP_STATE_SUPPORTED FALSE CACHE INTERNAL "linker supports push/pop state")
endif()
unset(__linker_help)
endif()
## WHOLE_ARCHIVE: Force loading all members of an archive
if(_CMAKE_LINKER_PUSHPOP_STATE_SUPPORTED)
set(CMAKE_LINK_LIBRARY_USING_WHOLE_ARCHIVE "LINKER:--push-state,--whole-archive"
"<LINK_ITEM>"
"LINKER:--pop-state")
else()
set(CMAKE_LINK_LIBRARY_USING_WHOLE_ARCHIVE "LINKER:--whole-archive"
"<LINK_ITEM>"
"LINKER:--no-whole-archive")
endif()
set(CMAKE_LINK_LIBRARY_USING_WHOLE_ARCHIVE_SUPPORTED TRUE)
# Features for LINK_GROUP generator expression
## RESCAN: request the linker to rescan static libraries until there is
## no pending undefined symbols
set(CMAKE_LINK_GROUP_USING_RESCAN "LINKER:--start-group" "LINKER:--end-group")
set(CMAKE_LINK_GROUP_USING_RESCAN_SUPPORTED TRUE)
# Debian policy requires that shared libraries be installed without
# executable permission. Fedora policy requires that shared libraries
# be installed with the executable permission. Since the native tools
# create shared libraries with execute permission in the first place a
# reasonable policy seems to be to install with execute permission by
# default. In order to support debian packages we provide an option
# here. The option default is based on the current distribution, but
# packagers can set it explicitly on the command line.
if(DEFINED CMAKE_INSTALL_SO_NO_EXE)
# Store the decision variable in the cache. This preserves any
# setting the user provides on the command line.
set(CMAKE_INSTALL_SO_NO_EXE "${CMAKE_INSTALL_SO_NO_EXE}" CACHE INTERNAL
"Install .so files without execute permission.")
else()
# Store the decision variable as an internal cache entry to avoid
# checking the platform every time. This option is advanced enough
# that only package maintainers should need to adjust it. They are
# capable of providing a setting on the command line.
if(EXISTS "/etc/debian_version")
set(CMAKE_INSTALL_SO_NO_EXE 1 CACHE INTERNAL
"Install .so files without execute permission.")
else()
set(CMAKE_INSTALL_SO_NO_EXE 0 CACHE INTERNAL
"Install .so files without execute permission.")
endif()
endif()
# Match multiarch library directory names.
set(CMAKE_LIBRARY_ARCHITECTURE_REGEX "[a-z0-9_]+(-[a-z0-9_]+)?-linux-gnu[a-z0-9_]*")
include(Platform/UnixPaths)
# Debian has lib32 and lib64 paths only for compatibility so they should not be
# searched.
if(NOT CMAKE_CROSSCOMPILING)
if (EXISTS "/etc/debian_version")
set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS FALSE)
set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS FALSE)
endif()
if (EXISTS "/etc/arch-release")
set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS FALSE)
endif()
endif()