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Fix build failure on x32.

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Unlike i386, x32 can't accept -march=i686 but wants -fPIC, same as amd64
(both are x86_64 ABIs after all).  Thus, check for the __x86_64__ define
instead of pointer width.
This commit is contained in:
Adam Borowski
2015-01-29 05:50:12 +01:00
parent 447ea28afa
commit 15d5037df4
1 changed files with 3 additions and 1 deletions
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4
CMakeLists.txt
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@@ -43,6 +43,7 @@ include(CheckCmakeCompat)
# Include cmake modules
include(CheckIncludeFiles)
include(CheckLibraryExists)
include(CheckSymbolExists)
include(CheckStructHasMember)
include(FindPkgConfig)
include(TestBigEndian)
@@ -131,7 +132,8 @@ endif()
# Compiler-specific flags
if(CMAKE_COMPILER_IS_GNUCC)
if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64" OR CMAKE_SYSTEM_PROCESSOR MATCHES "i686")
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
CHECK_SYMBOL_EXISTS(__x86_64__ "" IS_X86_64)
if(IS_X86_64)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
else()
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=i686")