I found the problem.

MinGW's stdlib.h is doing this:

#define strtod __strtod

 

Hence, you can no longer use strtod from another namespace; you'd get:

src/widgets/ege-paint-def.cpp:247:34: error: '__strtod' is not a member of 'Glib

::Ascii'

                     double dbl = Glib::Ascii::strtod(srgb.substr(numPos + 3));

                                  ^

(after reordering the include files, I got this error, which made me realize a macro is causing trouble)

 

 

Turns out we don't needto include <stdlib.h> in that particular file. (at least not for my builds). If we do need it, we should add

#undef ...

after including it.