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We've had multiple bugs in the past where we have been inadvertently matching the default rule, (which we never want to do). We recently added a catch-all rule to avoid this, (and made this rule robust for future start conditions). Kristian pointed out that flex allows us to go one step better. This syntax: %option warn nodefault instructs flex to not generate the default rule at all. Further, flex will generate a warning at compile time if the set of rules we provide are inadequate, (such that it would be possible for the default rule to be matched). With this warning in place, I found that the catch-all rule was in fact missing something. The catch-all rule uses a pattern of "." which doesn't match newlines. So here we extend the newline-matching rule to all start conditions. That is enough to convince flex that it really doesn't need any default rule. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Kristian Høgsberg <krh@bitplanet.net> |
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File: docs/README.WIN32 Last updated: 21 June 2013 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons osmesa mesagdi to build classic mesa Windows GDI drivers; or scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. Recipe ------ Building on windows requires several open-source packages. These are steps that work as of this writing. - install python 2.7 - install scons (latest) - install mingw, flex, and bison - install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe - install git - download mesa from git see http://www.mesa3d.org/repository.html - run scons General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.