Cf. our discussion on Twitter. This is the only change I had to do on the build system to be able to cross-build G'MIC for Windows.
There is another issue with the CMAKE_AUTOMOC tool but for now I could at least make the build work with Wine and binfmt_misc, which worked fine anyway. Eventually though if I can understand what moc does, it would be better to run a native binary at build time.
Hardcoding pkg-config will work only for native builds. If you want to
cross-compile, you need to search for the appropriate tools, which is
what FindPkgConfig module does. Then you can use PKG_CONFIG_EXECUTABLE
variable which will be set according to your toolchain rules.
Also old-style binary config tools are not a good idea as they are not
very cross-compilation friendly (to do it right, we would have to
generate variants per (host, target) couple). Instead pkg-config is the
right process as it works well without having to run non-native
binaries. I am actually considering removing gimptool from GIMP
eventually (and document the generic pkg-config process instead).
Running gimptool-2.0 --libs-noui and --cflags-noui is the
equivalent to run pkg-config --libs (--cflags respectively) on
gimp-2.0. So let's just replace by these commands.
Cf. our discussion on Twitter. This is the only change I had to do on the build system to be able to cross-build G'MIC for Windows.
There is another issue with the
CMAKE_AUTOMOCtool but for now I could at least make the build work with Wine and binfmt_misc, which worked fine anyway. Eventually though if I can understand whatmocdoes, it would be better to run a native binary at build time.Hardcoding
pkg-configwill work only for native builds. If you want to cross-compile, you need to search for the appropriate tools, which is what FindPkgConfig module does. Then you can use PKG_CONFIG_EXECUTABLE variable which will be set according to your toolchain rules.Also old-style binary config tools are not a good idea as they are not very cross-compilation friendly (to do it right, we would have to generate variants per (host, target) couple). Instead pkg-config is the right process as it works well without having to run non-native binaries. I am actually considering removing gimptool from GIMP eventually (and document the generic pkg-config process instead).
Running
gimptool-2.0 --libs-nouiand--cflags-nouiis the equivalent to runpkg-config --libs(--cflagsrespectively) ongimp-2.0. So let's just replace by these commands.