diff options
| author | Matthias Schiffer <mschiffer@universe-factory.net> | 2014-06-08 16:13:17 +0200 |
|---|---|---|
| committer | Matthias Schiffer <mschiffer@universe-factory.net> | 2014-06-08 16:13:17 +0200 |
| commit | 65fc11a49ec939261ca9a3dbfa534a9c3354825e (patch) | |
| tree | 411b6dc3bdb13d7f0776426142a3f4d957f74814 /cmake | |
| parent | 7665159490d533c3c7fbaa1c51c260285a5a361e (diff) | |
| download | fastd-65fc11a49ec939261ca9a3dbfa534a9c3354825e.tar fastd-65fc11a49ec939261ca9a3dbfa534a9c3354825e.zip | |
Add ENABLE_LTO cmake option
Tested with GCC and clang; unlikely to work with other toolchains, so it's
disabled by default.
Diffstat (limited to 'cmake')
| -rw-r--r-- | cmake/CMakeFindBinUtils.cmake | 8 | ||||
| -rw-r--r-- | cmake/checks.cmake | 15 | ||||
| -rw-r--r-- | cmake/config.cmake | 2 |
3 files changed, 22 insertions, 3 deletions
diff --git a/cmake/CMakeFindBinUtils.cmake b/cmake/CMakeFindBinUtils.cmake index 83d1a4e..753577a 100644 --- a/cmake/CMakeFindBinUtils.cmake +++ b/cmake/CMakeFindBinUtils.cmake @@ -1,5 +1,7 @@ -find_program(CMAKE_AR NAMES ${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar HINTS ${_CMAKE_TOOLCHAIN_LOCATION}) -find_program(CMAKE_NM NAMES ${_CMAKE_TOOLCHAIN_PREFIX}gcc-nm HINTS ${_CMAKE_TOOLCHAIN_LOCATION}) -find_program(CMAKE_RANLIB NAMES ${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib HINTS ${_CMAKE_TOOLCHAIN_LOCATION}) +if(CMAKE_COMPILER_IS_GNUCC) + find_program(CMAKE_AR NAMES ${_CMAKE_TOOLCHAIN_PREFIX}gcc-ar HINTS ${_CMAKE_TOOLCHAIN_LOCATION}) + find_program(CMAKE_NM NAMES ${_CMAKE_TOOLCHAIN_PREFIX}gcc-nm HINTS ${_CMAKE_TOOLCHAIN_LOCATION}) + find_program(CMAKE_RANLIB NAMES ${_CMAKE_TOOLCHAIN_PREFIX}gcc-ranlib HINTS ${_CMAKE_TOOLCHAIN_LOCATION}) +endif(CMAKE_COMPILER_IS_GNUCC) include(${CMAKE_ROOT}/Modules/CMakeFindBinUtils.cmake) diff --git a/cmake/checks.cmake b/cmake/checks.cmake index 225c443..62d10d0 100644 --- a/cmake/checks.cmake +++ b/cmake/checks.cmake @@ -9,6 +9,21 @@ if(ARCH_X86 OR ARCH_X86_64) check_c_compiler_flag("-mpclmul" HAVE_PCLMUL) endif(ARCH_X86 OR ARCH_X86_64) + + +if(ENABLE_LTO) + set(CFLAGS_LTO "-flto") + set(CFLAGS_NO_LTO "-fno-lto") + + check_c_compiler_flag("-fwhole-program" HAVE_FLAG_WHOLE_PROGRAM) + if(HAVE_FLAG_WHOLE_PROGRAM) + set(LDFLAGS_LTO "-flto -fwhole-program") + else(HAVE_FLAG_WHOLE_PROGRAM) + set(LDFLAGS_LTO "-flto") + endif(HAVE_FLAG_WHOLE_PROGRAM) +endif(ENABLE_LTO) + + check_c_source_compiles(" #include <sys/types.h> #include <sys/socket.h> diff --git a/cmake/config.cmake b/cmake/config.cmake index e08955e..e77abc8 100644 --- a/cmake/config.cmake +++ b/cmake/config.cmake @@ -23,6 +23,8 @@ set(WITH_CAPABILITIES ${LINUX} CACHE BOOL "Include support for POSIX capabilitie set(ENABLE_LIBSODIUM TRUE CACHE BOOL "Use libsodium instead of NaCl") set(ENABLE_OPENSSL FALSE CACHE BOOL "Enable crypto implementations using OpenSSL") +set(ENABLE_LTO FALSE CACHE BOOL "Enable link-time optimization") + if(LINUX) set(ENABLE_SYSTEMD TRUE CACHE BOOL "Enable systemd support") endif(LINUX) |