| From 5da1f631bc753655ac94b08a6233eecd0d451327 Mon Sep 17 00:00:00 2001 |
| From: "Arnout Vandecappelle (Essensium/Mind)" <arnout@mind.be> |
| Date: Fri, 26 Aug 2016 21:55:06 +0200 |
| Subject: [PATCH] Fix LTO support for cross-compilation. |
| |
| When cross-compiling, the ar and ranlib to be used for LTO are prefixed |
| by the cross-tuple. gcc-ar and gcc-ranlib may not exist. Cfr. |
| http://autobuild.buildroot.net/results/f3c/f3c48da3a9706cd366c0e0a96c3cd0ff959f2a78/ |
| |
| Therefore, search for an appropriate lto-ar and lto-ranlib before |
| enabling LTO. |
| |
| Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> |
| --- |
| Submitted upstream: https://github.com/tomba/kmsxx/pull/14 |
| --- |
| CMakeLists.txt | 12 +++++++++--- |
| 1 file changed, 9 insertions(+), 3 deletions(-) |
| |
| diff --git a/CMakeLists.txt b/CMakeLists.txt |
| index e5b5ea5..c61c81d 100644 |
| --- a/CMakeLists.txt |
| +++ b/CMakeLists.txt |
| @@ -39,9 +39,15 @@ if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG) |
| CHECK_CXX_COMPILER_FLAG("-flto" HAS_LTO_FLAG) |
| |
| if (HAS_LTO_FLAG) |
| - set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto") |
| - set(CMAKE_AR gcc-ar) |
| - set(CMAKE_RANLIB gcc-ranlib) |
| + find_program(LTO_AR NAMES "${CMAKE_C_COMPILER}-ar" gcc-ar) |
| + find_program(LTO_RANLIB NAMES "${CMAKE_C_COMPILER}-ranlib" gcc-ranlib) |
| + if (LTO_AR AND LTO_RANLIB) |
| + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto") |
| + set(CMAKE_AR "${LTO_AR}") |
| + set(CMAKE_RANLIB "${LTO_RANLIB}") |
| + else() |
| + message(STATUS "gcc-ar or gcc-ranlib not found, disabling LTO") |
| + endif() |
| endif() |
| endif() |
| |
| -- |
| 2.9.3 |
| |
