CMakeLists.txt: Only use -Wa,-mbig-obj and -O3 on Windows.

Note: -mbig-obj has been available on 64bit bit builds for a while now, but
on 32bit builds it needs a rather recent binutils version (2.35, 07/2020).

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 04920a6cbeec9a1456fee8656a81c390a687a0b7..add9c02f9923464ba02ed981022b49c899ad8b0f 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -465,8 +465,9 @@ add_definitions(-D__STDC_LIMIT_MACROS)
 add_definitions(-Wall -Wextra)
 add_definitions(-std=c++11)
 add_definitions(-DBOOST_MATH_DISABLE_FLOAT128=1)
-add_definitions(-Wa,-mbig-obj)
-add_definitions(-O3)
+if(WIN32)
+       add_definitions(-Wa,-mbig-obj -O3)
+endif()
 
 if(ENABLE_FLOW)
        add_definitions(-DENABLE_FLOW)