How to tell scons to use MinGW instead of MSVC

Question

I'm trying to build the C++ port of zxing on Windows, but scons fails with:

cl : Command line error D8021 : invalid numeric argument '/Wextra'

I have both VS2010 and MinGW installed, and scons tries to use the MSVC compiler, even though the SConscript file assumes gcc and use gcc-specific parameters, which causes the error.

How can I tell scons to use MinGW instead?

score 17 · Accepted Answer · edited Sep 08 '21 at 11:16

17

Scons uses MSVC compiler by default on windows. To set mignw compiler use tools parameter while creating Environment object.

env = Environment(tools = ['mingw'])

And then use env.Program() instead of Program().

edited Sep 08 '21 at 11:16

sashoalm

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answered Oct 31 '12 at 17:43

Torsten

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did not work for me. It says cc = gcc but then when building targets it still uses cl (bug?) – ljgww Jan 27 '17 at 14:38
1

found it: it shall be env.Program(...) instead of Program(your_code) see: http://stackoverflow.com/questions/21242206/scons-cant-pick-the-compiler-mingw – ljgww Feb 20 '17 at 11:02
@ljgww Either call `env.Program` like you found out or change the default construction environment instead of creating a new one. You can do it by calling `DefaultEnvironment` instead of `Environment`. – Piotr Siupa May 14 '22 at 09:55
As far as I know there may be some complication if yo won't also specify MinGW linker in the `tools`. I think it is called `gnulink`. There is also answer for a different question which shows another way to set tools: https://stackoverflow.com/a/11391819/3052438 – Piotr Siupa May 14 '22 at 09:59

score 2 · Answer 2 · answered Jun 01 '18 at 06:55

Below is my working SConstruct for mingw on Windows:

import os

env = Environment(ENV={'PATH': os.environ['PATH'], 'TEMP': os.environ['TEMP']}, tools=['mingw'])
env.Program('main.cpp')

Windows Environment variables PATH and TEMP can be set externally. Environment variable PATH should include the bin folder path of mingw.

How to tell scons to use MinGW instead of MSVC

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