Cmake : /bigobj: No such file or directory [duplicate] - c++

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GCC equivalent of MS's /bigobj
(5 answers)
Closed 1 year ago.
When I was building an application of mine which used Assimp, I got an error
C:\Users\nitin\AppData\Local\Temp\ccA4Vs3q.s: Assembler messages:
C:\Users\nitin\AppData\Local\Temp\ccA4Vs3q.s: Fatal error: can't write 117 bytes to section .text of CMakeFiles\assimp.dir\AssetLib\IFC\IFCReaderGen1_2x3.cpp.obj because: 'File too big'
c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/as.exe: CMakeFiles\assimp.dir\AssetLib\IFC\IFCReaderGen1_2x3.cpp.obj: too many sections (46774)
C:\Users\nitin\AppData\Local\Temp\ccA4Vs3q.s: Fatal error: can't close CMakeFiles\assimp.dir\AssetLib\IFC\IFCReaderGen1_2x3.cpp.obj: File too big
Nade\vendor\assimp\code\CMakeFiles\assimp.dir\build.make:1965: recipe for target 'Nade/vendor/assimp/code/CMakeFiles/assimp.dir/AssetLib/IFC/IFCReaderGen1_2x3.cpp.obj' failed
So I searched online for solutions and I found a solution that said that I need to set the /bigobj flag.
I am using Cmake and Mingw32-make.
But when I add the definition like this
set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} /bigobj)
or like that
add_definitions(/bigobj)
I Get the error
/bigobj: No such file or directory
How do I solve this error while solving the Too Big OBJ file error at the same time?

Answer 1

The /bigobj option is for Microsoft Visual Studio compiler.
For GCC, try -Wa,-mbig-obj instead.
If you want to support both, try:
if (MSVC)
add_compile_options(/bigobj)
else ()
add_compile_options(-Wa,-mbig-obj)
endif ()
If you want to specify directly only a single target:
target_compile_options(my_target_name PRIVATE /bigobj)