CheckPIESupported

New in version 3.14.

Check whether the linker supports Position Independent Code (PIE) or No Position Independent Code (NO_PIE) for executables. Use this to ensure that the POSITION_INDEPENDENT_CODE target property for executables will be honored at link time.

check_pie_supported

check_pie_supported([OUTPUT_VARIABLE <output>]
                    [LANGUAGES <lang>...])

Options are:

OUTPUT_VARIABLE <output>

Set <output> variable with details about any error. If the check is bypassed because it uses cached results from a previous call, the output will be empty even if errors were present in the previous call.

LANGUAGES <lang>...

Check the linkers used for each of the specified languages. If this option is not provided, the command checks all enabled languages.

C, CXX, Fortran are supported.

New in version 3.23: OBJC, OBJCXX, CUDA, and HIP are supported.

It makes no sense to use this module when CMP0083 is set to OLD, so the command will return an error in this case. See policy CMP0083 for details.

Variables

For each language checked, two boolean cache variables are defined.

CMAKE_<lang>_LINK_PIE_SUPPORTED

Set to true if PIE is supported by the linker and false otherwise.

CMAKE_<lang>_LINK_NO_PIE_SUPPORTED

Set to true if NO_PIE is supported by the linker and false otherwise.

Examples

check_pie_supported()
set_property(TARGET foo PROPERTY POSITION_INDEPENDENT_CODE TRUE)

# Retrieve any error message.
check_pie_supported(OUTPUT_VARIABLE output LANGUAGES C)
set_property(TARGET foo PROPERTY POSITION_INDEPENDENT_CODE TRUE)
if(NOT CMAKE_C_LINK_PIE_SUPPORTED)
  message(WARNING "PIE is not supported at link time: ${output}.\n"
                  "PIE link options will not be passed to linker.")
endif()