How can I detect g++ and MinGW in C++ preprocessor?

Question

I want to do something like:

#ifdef GCC
#define GetFunctionName() string("My function name is ") + __PRETTY_FUNCTION__;
#endif

Since I want to use pretty PRETTY_FUNCTION this is only supported by gnu as far as I know so I need to detect if I am compiling for g++ and MinGW, how can I do that? I'm guessing all I need to know are the compiler's preprocessor definitions, like I did for Microsoft below.

#ifdef WIN32
#define LogFuncBegin() gLogger.FuncBegin( __FUNCTION__ );
#define LogFuncEndSuccess() gLogger.FuncEndSuccess( __FUNCTION__ );
#endif

How can I detect g++ and MinGW in C++ preprocessor?

score 63 · Accepted Answer · answered Jul 05 '13 at 17:09

63

You can make use of:

#ifdef __GNUC__
#ifdef __MINGW32__

For additional macro's you might be interested in this page which shows other compiler macros

answered Jul 05 '13 at 17:09

Floris Velleman

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Did your test cases include MinGW-64? – jww Jul 30 '15 at 22:15
@jww No but MinGW-64 will also define the 32 macro, so this would work for that as well. – Floris Velleman Aug 02 '15 at 14:07
2

A more up-to-date version of that compiler macros list is in the [Pre-defined Compiler Macros project at sourceforge](https://sourceforge.net/p/predef/wiki/Home/) – rakslice Oct 06 '17 at 00:49

score 42 · Answer 2 · edited Jul 29 '16 at 10:13

42

For GCC:

#ifdef __GNUC__

For MinGW:

#ifdef __MINGW32__

x86_64-w64-mingw32-gcc defines both __MINGW32__ and __MINGW64__.

edited Jul 29 '16 at 10:13

kay

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answered Jul 05 '13 at 17:08

sedavidw

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Did your test cases include MinGW-64? – jww Jul 30 '15 at 22:16
2

This answer was written pre-MinGW-64. But I think that defines the `__MINGW32__` macro as well. So should still work – sedavidw Sep 08 '15 at 14:50
This is kind of a moot point. I can't find a [MinGW-64 offered by the project](http://www.mingw.org/).... There's no sense in solving a problem that does not exist.... – jww Sep 09 '15 at 00:59
10

@jww MinGW-w64 is a hard fork of MinGW, because MinGW didn't do a great job. Pretty much everyone uses MinGW-w64 these days, not the original MinGW. Same with MSYS2 and MSYS. – Alexander Huszagh Jan 28 '18 at 21:29

How can I detect g++ and MinGW in C++ preprocessor?

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