package/kmsxx/0001-Fix-LTO-support-for-cross-compilation.patch

   1 From 5da1f631bc753655ac94b08a6233eecd0d451327 Mon Sep 17 00:00:00 2001
   2 From: "Arnout Vandecappelle (Essensium/Mind)" <arnout@mind.be>
   3 Date: Fri, 26 Aug 2016 21:55:06 +0200
   4 Subject: [PATCH] Fix LTO support for cross-compilation.
   5
   6 When cross-compiling, the ar and ranlib to be used for LTO are prefixed
   7 by the cross-tuple. gcc-ar and gcc-ranlib may not exist. Cfr.
   8 http://autobuild.buildroot.net/results/f3c/f3c48da3a9706cd366c0e0a96c3cd0ff959f2a78/
   9
  10 Therefore, search for an appropriate lto-ar and lto-ranlib before
  11 enabling LTO.
  12
  13 Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
  14 ---
  15 Submitted upstream: https://github.com/tomba/kmsxx/pull/14
  16 ---
  17  CMakeLists.txt | 12 +++++++++---
  18  1 file changed, 9 insertions(+), 3 deletions(-)
  19
  20 diff --git a/CMakeLists.txt b/CMakeLists.txt
  21 index e5b5ea5..c61c81d 100644
  22 --- a/CMakeLists.txt
  23 +++ b/CMakeLists.txt
  24 @@ -39,9 +39,15 @@ if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
  25      CHECK_CXX_COMPILER_FLAG("-flto" HAS_LTO_FLAG)
  26
  27      if (HAS_LTO_FLAG)
  28 -        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto")
  29 -        set(CMAKE_AR gcc-ar)
  30 -        set(CMAKE_RANLIB gcc-ranlib)
  31 +        find_program(LTO_AR NAMES "${CMAKE_C_COMPILER}-ar" gcc-ar)
  32 +        find_program(LTO_RANLIB NAMES "${CMAKE_C_COMPILER}-ranlib" gcc-ranlib)
  33 +        if (LTO_AR AND LTO_RANLIB)
  34 +            set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto")
  35 +            set(CMAKE_AR "${LTO_AR}")
  36 +            set(CMAKE_RANLIB "${LTO_RANLIB}")
  37 +        else()
  38 +            message(STATUS "gcc-ar or gcc-ranlib not found, disabling LTO")
  39 +        endif()
  40      endif()
  41  endif()
  42
  43 --
  44 2.9.3
  45