diff options
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index ba0a7d5b..ad5820c7 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -117,6 +117,24 @@ IF (CMAKE_C_COMPILER_ID MATCHES "^GNU$" OR SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -Wshadow") SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -Wmissing-prototypes") SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -Wcast-qual") + # Ideally this will be a compile/link time check, yet there's no obvious way + # how considering how old our minimum required cmake version is. The official + # cmake.org side does not host the manual pages even. Normally we can use + # either of the following two, yet neither is supported as of 3.0.2 + # - check_linker_flag - does not exist + # - try_compile - does not support linker flags + # + # The CI fails with this on MacOS + IF(NOT CMAKE_SYSTEM_NAME MATCHES "Darwin") + # Place the functions and data into separate sections, allowing the linker + # to garbage collect the unused ones. + SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ffunction-sections -fdata-sections") + SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections") + SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--gc-sections") + # Printing the discarded section is "too much", so enable on demand. + #SET(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} -Wl,--print-gc-sections") + #SET(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG} -Wl,--print-gc-sections") + ENDIF(NOT CMAKE_SYSTEM_NAME MATCHES "Darwin") ENDIF (CMAKE_C_COMPILER_ID MATCHES "^GNU$" OR CMAKE_C_COMPILER_ID MATCHES "^Clang$") IF (CMAKE_C_COMPILER_ID MATCHES "^XL$") |