General ======= For more information about the port or GLib, GTk+ and the GIMP to native Windows, and pre-built binary packages, see http://www.iki.fi/tml/gimp/win32/ . "Native" means that we use the Win32 API only, and not any POSIX operating system emulation layer except that provided by the Microsoft runtime C library. Actually, a pthreads emulation library is used. To build GLib on Win32, you can use either gcc or the Microsoft compiler and tools. Both the compiler from MSVC 5.0 and from MSVC 6.0 have been used successfully. However, the makefiles for MSVC are not up-to-date, sorry. If you fix the makefile.msc files, and manage to build with MSVC, please send the updated makefile.msc files to the gimpwin-dev list. With gcc I mean gcc-2.95 or gcc-2.95.2 as distributed by Mumit Khan, either as a mingw version (preferred), or running under cygwin. To successfully use gcc, follow the instructions below. We want to use gcc -mno-cygwin, i.e. produce executables (.exe and .dll files) that do *not* require the cygwin runtime library. This is called "mingw". I also use the -fnative-struct flag, which means that in order to use the prebuilt DLLs (especiall of GTK+), you *must* also use that flag. (This flag means that the struct layout is identical to that used by MSVC.) To test the GLib functions, go to the tests subdirectory and enter `nmake -f makefile.msc check` or `make -f makefile.mingw check`. If you would want to use the cygwin tools to generate executables that *do* use the cygwin runtime, the normal Unix configuration method should work as if on Unix. But it won't produce DLLs. At least I haven't succeeded in that. Also, I have no idea what changes are necessary to the code for it to run successfully on cygwin. With a little work, it might be possible to use the ./configure mechanism also with a "mingw32" configuration. The following preprocessor macro are used for conditional compilation related to Win32: - G_OS_WIN32 is defined when compiling for Win32, *and* without any POSIX emulation, other that to the extent provided by the bundled Microsoft C library (msvcrt.dll) and the pthreads-win32 library. For instance, pathnames are in the native Windows syntax. - _WIN32 is defined by the compiler The Win32 port uses the combination with both of those on. As G_OS_WIN32 is defined in glibconfig.h, it is available to all source files that use GLib (or GTk+, which uses GLib). Additionally, there are the compiler-specific macros: - _MSC_VER is defined when using the Microsoft compiler - __GNUC__ is defined when using GCC Some of the usage of these macros used to be a bit mixed up, and had to be straightened out when adding the gcc support. In particular, I used to check for _MSC_VER in some places where I really wanted to check for the Microsoft C library, and those checks has now been changed to G_OS_WIN32. G_OS_WIN32 implies using the Microsoft C runtime MSVCRT.DLL. Building software that use GLib or GTk+ ======================================= Unfortunately, even building software that just *use* GLib or GTk+ also require to have the right compiler set up the right way, so if you intend to use gcc, follow the relevant instructions below in that case, too. Pthreads library ================ Before building you must get the pthreads library for Win32 from http://sourceware.cygnus.com/pthreads-win32/. The pthreads-win32 snapshot from 1999-05-30 is the one that should be used. Edit the location of the pthreads library and include files in makefile.msc or makefile.mingw. The pthreads distribution includes the precompiled dll and import libraries both for MSVC and gcc. The pthreads for Win32 package that the thread support uses supposedly isn't quite ready yet, and thus threads stuff should not be relied upon for anything serious. Where are the makefiles? ======================== If you are building from a CVS snapshot, you will not have any makefile.mingw or makefile.msc file. You should copy the corresponding makefile.mingw.in or makefile.msc.in file to that name, and edit the line that sets GLIB_VER to the correct version number. This is done automatically when an official distribution package is built. Building with gcc ================= I use the latest and greatest gcc, gcc-2.95.2. 2.95 will also work. Earlier version might, but you are on your own. You can either use gcc running on cygwin, or the "pure" mingw gcc. Using the latter is much easier. Just fetch the latest version of gcc for mingw and the msvcrt runtime, currently from ftp://ftp.nanotech.wisc.edu/pub/khan/gnu-win32/mingw32/snapshots/gcc-2.95.2-1/ . Download the three zip archives: the gcc--msvcrt, mingw-msvcrt- and binutils--msvcrt, and unpack them in a suitable directory. Set up your PATH so that the gcc from the bin directory that got created above is the one that gets used. You can skip steps 1--5 below. Even if you run the mingw gcc, you still want to have cygwin to run make in. If you want to run a cygwin-based gcc, it gets much more complicated. We still want gcc to produce code that does not use cygwin, but the msvcrt runtime. The way to do this can be quite complex, and the instructions are not included here. Contact me if you want some possibly outdated, misleading and incomplete advice. Building with MSVC ================== If using the Microsoft toolchain, build with `nmake -f makefile.msc`. Install with `nmake -f makefile.msc install`. --Tor Lillqvist