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Add PIC option (#66)

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William Tambellini 2019-02-13 02:55:17 -08:00 committed by Guillaume Chatelet
parent 96133906d6
commit 7806502271
1 changed files with 7 additions and 0 deletions
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7
CMakeLists.txt
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@ -14,7 +14,12 @@ endif(NOT CMAKE_BUILD_TYPE)
option(BUILD_TESTING "Enable test (depends on googletest)." OFF) option(BUILD_TESTING "Enable test (depends on googletest)." OFF)
# BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make
# it prominent in the GUI. # it prominent in the GUI.
# cpu_features uses bit-fields which are - to some extends - implementation-defined (see https://en.cppreference.com/w/c/language/bit_field).
# As a consequence it is discouraged to use cpu_features as a shared library because different compilers may interpret the code in different ways.
# Prefer static linking from source whenever possible.
option(BUILD_SHARED_LIBS "Build library as shared." OFF) option(BUILD_SHARED_LIBS "Build library as shared." OFF)
# PIC
option(BUILD_PIC "Build with Position Independant Code." OFF) # Default is off at least for GCC
include(CheckIncludeFile) include(CheckIncludeFile)
include(CheckSymbolExists) include(CheckSymbolExists)
@ -106,6 +111,7 @@ if(UNIX)
if(HAVE_STRONG_GETAUXVAL) if(HAVE_STRONG_GETAUXVAL)
target_compile_definitions(unix_based_hardware_detection PRIVATE HAVE_STRONG_GETAUXVAL) target_compile_definitions(unix_based_hardware_detection PRIVATE HAVE_STRONG_GETAUXVAL)
endif() endif()
set_property(TARGET unix_based_hardware_detection PROPERTY POSITION_INDEPENDENT_CODE ${BUILD_PIC})
endif() endif()
# #
@ -122,6 +128,7 @@ add_library(cpu_features ${CPU_FEATURES_HDRS} ${CPU_FEATURES_SRCS})
set_target_properties(cpu_features PROPERTIES PUBLIC_HEADER "${CPU_FEATURES_HDRS}") set_target_properties(cpu_features PROPERTIES PUBLIC_HEADER "${CPU_FEATURES_HDRS}")
setup_include_and_definitions(cpu_features) setup_include_and_definitions(cpu_features)
target_link_libraries(cpu_features PUBLIC ${CMAKE_DL_LIBS}) target_link_libraries(cpu_features PUBLIC ${CMAKE_DL_LIBS})
set_property(TARGET cpu_features PROPERTY POSITION_INDEPENDENT_CODE ${BUILD_PIC})
target_include_directories(cpu_features target_include_directories(cpu_features
PUBLIC $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/cpu_features> PUBLIC $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/cpu_features>
) )