From c2b56634cfae06e4c2c373b96bc4da144adfe86f Mon Sep 17 00:00:00 2001 From: Reid Kleckner Date: Thu, 22 Dec 2016 19:12:14 +0000 Subject: [PATCH] Pass -Wa,-mbig-obj in 64-bit mingw builds COFF has a 2**16 section limit, and on Win64, every COMDAT function creates at least 3 sections: .text, .pdata, and .xdata. For MSVC, we enable bigobj on a file-by-file basis, but GCC appears to hit the limit on different files. Fixes PR25953 llvm-svn: 290358 --- llvm/cmake/modules/HandleLLVMOptions.cmake | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/llvm/cmake/modules/HandleLLVMOptions.cmake b/llvm/cmake/modules/HandleLLVMOptions.cmake index 964fa59c0bae..133e8ef3d8a1 100644 --- a/llvm/cmake/modules/HandleLLVMOptions.cmake +++ b/llvm/cmake/modules/HandleLLVMOptions.cmake @@ -232,6 +232,13 @@ if(MSVC) set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /STACK:10000000") elseif(MINGW) # FIXME: Also cygwin? set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--stack,16777216") + + # Pass -mbig-obj to mingw gas on Win64. COFF has a 2**16 section limit, and + # on Win64, every COMDAT function creates at least 3 sections: .text, .pdata, + # and .xdata. + if (CMAKE_SIZEOF_VOID_P EQUAL 8) + append("-Wa,-mbig-obj" CMAKE_C_FLAGS CMAKE_CXX_FLAGS) + endif() endif() if( MSVC )