Current File : //usr/share/cmake-3.22/Modules/Platform/Linux.cmake
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()
# 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 AND 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()
# RISCV needs -latomic
# https://gitlab.kitware.com/cmake/cmake/-/issues/20895
#
# Ideally I'd use CMAKE_C_COMPILER_ARCHITECTURE_ID, but that is only
# available on Win platforms. Not sure why though, cause every
# compiler on Linux has a default architecture it compiles for too,
# when no flags are passed to ask the compiler to behave differently.
if(CMAKE_SYSTEM_PROCESSOR STREQUAL "riscv64")
string(APPEND CMAKE_C_STANDARD_LIBRARIES " -latomic")
string(APPEND CMAKE_CXX_STANDARD_LIBRARIES " -latomic")
endif()
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