Jeremy Huddleston <jerem...@apple.com> writes: > I noticed this message in the release notes for 0.24.4: > """ > This release also contains some basic support for using the NEON > acceleration on iOS, although actually building pixman on that platform > remains difficult. > """ > > I was curious about what was so difficult about building pixman for > iOS and decided to lend a hand. Attached are 2 patches for review and > build instructions for how I got it to build. > > The script will build pixman master for iOS (after the 2 patches are > applied). The patches fix TLS detection and add support for > --disable-libpng (because I didn't feel like building libpng, too, and > pkg-config picked up my host libpng).
> Everything built just fine. I haven't tested it, but this should make > it easier for people to use in iOS if they want. You'll need to > adjust the path to the SDK and the minimum version of iOS that you > want to support as appropriate. I have pushed the libpng patch. Regarding the TLS patch, > Subject: [PATCH 2/2] Expand TLS support beyond __thread to __declspec(thread) > > Also prefer initial-exec if available. This code was pretty much > coppied from a similar commit that I made to xorg-server in April. I don't think initial-exec is appropriate for pixman, which is often dynamically opened. See these bugs: https://bugs.freedesktop.org/show_bug.cgi?id=34335 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=613221 https://bugs.freedesktop.org/show_bug.cgi?id=35268 Also, this part of the patch: > -AC_MSG_CHECKING(for __thread) > -AC_LINK_IFELSE([AC_LANG_SOURCE([[ > -#if defined(__MINGW32__) && !(__GNUC__ > 4 || (__GNUC__ == 4 && > __GNUC_MINOR__ >= 5)) > -#error This MinGW version has broken __thread support > -#endif > -#ifdef __OpenBSD__ > -#error OpenBSD has broken __thread support > -#endif looks like it is losing the workarounds for broken __thread support on OpenBSD and certain versions of MinGW. Søren _______________________________________________ Pixman mailing list Pixman@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/pixman