Re: [ft-devel] using pkg-config
2013/9/17 Behdad Esfahbod beh...@behdad.org: It also used to the case that pkg-config didn't handle cross-compilation properly (I haven't checked this in a while), which seems like it would be an issue for freetype. Works just fine for cross-compiling. I do that every day. It does? How does it work? At least with standard autoconf practices, pkg-config doesn't even seem to notice if you're cross-compiling, and just gives info for the cross-compilation host, which is usually incorrect... This isn't entirely surprising, as pkg-config doesn't use the compiler like most autoconf tests, and so won't automatically reflect changes in the toolchain used. The pkg-config autoconf macros could conceivably detect this situation (and do... what, I don't know, but they could at least disable pkg-config), but don't appear to even try. E.g. if you use the following basic configure.ac file: AC_INIT([t1], [0.0], [Miles Bader mi...@gnu.org]) AC_CONFIG_HEADERS([config.h]) AC_PROG_CC PKG_PROG_PKG_CONFIG have_libpng=no PKG_CHECK_MODULES([libpng], [libpng], [have_libpng=yes], [:]) if test $have_libpng = yes; then AC_DEFINE([HAVE_LIBPNG], [1], [Define if libpng is installed]) fi AC_CONFIG_FILES([Makefile]) AC_OUTPUT and then try to cross-compile with it: ./configure --host=x86_64-w64-mingw32 ... then the wrong thing will happen, and the build will fail. By contrast, a traditional library check using AC_CHECK_LIB will behave as expected. So at the least, it looks like some sort of special care is needed either on the part of the configure script or on the part of the user, to deal with pkg-config during cross-compilation. Thanks, -miles -- Cat is power. Cat is peace. ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] using pkg-config
On 9/17/2013 8:50 AM, Miles Bader wrote: 2013/9/17 Behdad Esfahbod beh...@behdad.org: It also used to the case that pkg-config didn't handle cross-compilation properly (I haven't checked this in a while), which seems like it would be an issue for freetype. Works just fine for cross-compiling. I do that every day. It does? How does it work? Define PKG_CONFIG_LIBDIR At least with standard autoconf practices, pkg-config doesn't even seem to notice if you're cross-compiling, and just gives info for the cross-compilation host, which is usually incorrect... True, that's the current situation but with PKG_CONFIG_LIBDIR defined you can avoid this. There are plans for a --host option (http://www.freedesktop.org/wiki/Software/pkg-config/CrossCompileProposal/) but I don't know what the current state is. John. ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] using pkg-config
On 13-09-17 07:14 AM, Khaled Hosny wrote: On Tue, Sep 17, 2013 at 07:58:27AM +0200, Werner LEMBERG wrote: I will soon need the HarfBuzz library which doesn't provide a `harfbuzz-config' script. That would be for GSUB closure I assume? Yep. This will be tricky since it will cause a circular dependency between harfbuzz and freetype. Let me think about it a bit. Uh, oh. I currently see only two solutions: (1) split HarfBuzz into two libraries (2) copy the GSUB closure stuff into FreeType Solution (1) means a lot of work for you, making HarfBuzz probably more difficult to maintain, and (2) would be a nasty hack, with the additional complication that HarfBuzz is written in C++... I think harfbuzz-ft part can be split just like harfbuzz-icu, then freetype would only depend on the plain harfbuzz, but its will have to maintain its own harfbuzz font functions implementation (you probably do not even need most of them). FreeType itself doesn't need harfbuzz-ft. I can split, but this time it has to be split into separate tarballs such that distros can build harfbuzz, then freetype, then harfbuzz-ft. But then hb-view and hb-shape depend on harfbuzz-ft currently... Let me think about it a bit. Regards, Khaled -- behdad http://behdad.org/ ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] using pkg-config
On 13-09-17 03:56 AM, John Tytgat wrote: On 9/17/2013 8:50 AM, Miles Bader wrote: 2013/9/17 Behdad Esfahbod beh...@behdad.org: It also used to the case that pkg-config didn't handle cross-compilation properly (I haven't checked this in a while), which seems like it would be an issue for freetype. Works just fine for cross-compiling. I do that every day. It does? How does it work? Define PKG_CONFIG_LIBDIR My favorite is in fact a wrapper. Eg. $ cat ~/.local/i686-w64-mingw32/bin/i686-w64-mingw32-pkg-config #!/bin/sh PKG_CONFIG_LIBDIR=$HOME/.local/i686-w64-mingw32/lib/pkgconfig export PKG_CONFIG_LIBDIR exec pkg-config $@ At least with standard autoconf practices, pkg-config doesn't even seem to notice if you're cross-compiling, and just gives info for the cross-compilation host, which is usually incorrect... True, that's the current situation but with PKG_CONFIG_LIBDIR defined you can avoid this. There are plans for a --host option (http://www.freedesktop.org/wiki/Software/pkg-config/CrossCompileProposal/) but I don't know what the current state is. John. -- behdad http://behdad.org/ ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] using pkg-config
On 13-09-15 08:26 AM, Miles Bader wrote: Werner LEMBERG w...@gnu.org writes: Does it make sense to completely switch to pkg-config? All of the above libraries provide .pc files. However, I wonder whether there are situations where there usage of pkg-config is problematic. A certain burden is that pkg-config itself must be installed (or pkgconf, which does the same in a probably better way). Is this a hassle on some platforms? My impression is that although on mainstream linux distros it's a pretty good bet pkg-config is available, it's far from universal if you care about the fringes -- and freetype looks very much like the sort of library that tends to care more about the fringes than usual. Users can install pkg-config. No big deal. Really, it's 2013. It also used to the case that pkg-config didn't handle cross-compilation properly (I haven't checked this in a while), which seems like it would be an issue for freetype. Works just fine for cross-compiling. I do that every day. - behdad http://behdad.org/ ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] using pkg-config
On 13-09-15 05:06 AM, Werner LEMBERG wrote: I will soon need the HarfBuzz library which doesn't provide a `harfbuzz-config' script. That would be for GSUB closure I assume? This will be tricky since it will cause a circular dependency between harfbuzz and freetype. Let me think about it a bit. -- behdad http://behdad.org/ ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] using pkg-config
I will soon need the HarfBuzz library which doesn't provide a `harfbuzz-config' script. That would be for GSUB closure I assume? Yep. This will be tricky since it will cause a circular dependency between harfbuzz and freetype. Let me think about it a bit. Uh, oh. I currently see only two solutions: (1) split HarfBuzz into two libraries (2) copy the GSUB closure stuff into FreeType Solution (1) means a lot of work for you, making HarfBuzz probably more difficult to maintain, and (2) would be a nasty hack, with the additional complication that HarfBuzz is written in C++... Sigh. Werner ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
[ft-devel] using pkg-config
Folks, FreeType's configure script currently uses the `AC_CHECK_LIB' m4 macro to detect the presence of libz and libbz2. For libpng, it uses the `libpng-config' script. I will soon need the HarfBuzz library which doesn't provide a `harfbuzz-config' script. Does it make sense to completely switch to pkg-config? All of the above libraries provide .pc files. However, I wonder whether there are situations where there usage of pkg-config is problematic. A certain burden is that pkg-config itself must be installed (or pkgconf, which does the same in a probably better way). Is this a hassle on some platforms? If possible, I would like to avoid a hybrid approach (this is, first checking for `foo.pc', then trying `foo-config', then using `AC_CHECK_LIB[foo]'). Any advice is highly welcomed. Werner ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] using pkg-config
Excuse me, just a small off-topic question, `libpng-config' script. I will soon need the HarfBuzz library which doesn't provide a `harfbuzz-config' script. Future release of FreeType2 will depend on HarfBuzz? Regards, mpsuzuki On 09/15/2013 06:06 PM, Werner LEMBERG wrote: Folks, FreeType's configure script currently uses the `AC_CHECK_LIB' m4 macro to detect the presence of libz and libbz2. For libpng, it uses the `libpng-config' script. I will soon need the HarfBuzz library which doesn't provide a `harfbuzz-config' script. Does it make sense to completely switch to pkg-config? All of the above libraries provide .pc files. However, I wonder whether there are situations where there usage of pkg-config is problematic. A certain burden is that pkg-config itself must be installed (or pkgconf, which does the same in a probably better way). Is this a hassle on some platforms? If possible, I would like to avoid a hybrid approach (this is, first checking for `foo.pc', then trying `foo-config', then using `AC_CHECK_LIB[foo]'). Any advice is highly welcomed. Werner ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] using pkg-config
Werner LEMBERG w...@gnu.org writes: Does it make sense to completely switch to pkg-config? All of the above libraries provide .pc files. However, I wonder whether there are situations where there usage of pkg-config is problematic. A certain burden is that pkg-config itself must be installed (or pkgconf, which does the same in a probably better way). Is this a hassle on some platforms? My impression is that although on mainstream linux distros it's a pretty good bet pkg-config is available, it's far from universal if you care about the fringes -- and freetype looks very much like the sort of library that tends to care more about the fringes than usual. It also used to the case that pkg-config didn't handle cross-compilation properly (I haven't checked this in a while), which seems like it would be an issue for freetype. It's not very hard to try both in turn, e.g.: have_libfoo=no PKG_CHECK_MODULES([luafoo], [luafoo], [have_luafoo=yes], [:]) if test $have_libfoo = no; then AC_CHECK_LIB([foo], [somefun], [have_luafoo=yes]) fi if test $have_libfoo = yes; then ...do stuff for libfoo... fi Should fallback gracefully to traditional checking if pkg-config isn't installed.. [When libraries are installed in funny places it can be a little more annoying without pkg-config, but AFAIK, libpng usually isn't one of those libraries...] -miles -- Innards, n. pl. The stomach, heart, soul, and other bowels. ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
Re: [ft-devel] using pkg-config
`libpng-config' script. I will soon need the HarfBuzz library which doesn't provide a `harfbuzz-config' script. Future release of FreeType2 will depend on HarfBuzz? Optionally only, as with the other libraries. Werner ___ Freetype-devel mailing list Freetype-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/freetype-devel
