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On 02/24/2014 02:06 AM, eroen wrote: |
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> On Sun, 23 Feb 2014 17:54:07 +0100, Fox <halfsocialfox@×××××.com> wrote: |
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>> Hello, |
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>> I am trying to compile fltk-1.1.10 both using an ebuild from [1] and |
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>> with just the downloaded source. I think this version needs libpng |
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>> 1.2 which is installed in one of the slots. |
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>> |
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>> Using the source code and cmake with FLTK_USE_SYSTEM_PNG off it |
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>> complies fine. I can see that it automatically points the libs to |
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>> /usr/lib64/libpng12.so.0. |
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>> |
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>> The ebuild does not use cmake, it uses autoconf/automake which is |
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>> also suported. I tried to build the code this way with |
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>> --disable/enable-localpng with no luck. |
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>> |
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>> The problem is the used png.h file. Which is /usr/include/png.h which |
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>> points to /usr/include/libpng16/png.h but I need the one from version |
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>> 1.2. |
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>> |
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>> I thought slots would allow to have both versions of the library and |
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>> use them but only one include file is present: |
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>> $ equery f libpng:1.2 |
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>> * Searching for libpng:1.2 ... |
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>> * Contents of media-libs/libpng-1.2.50-r1: |
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>> /usr |
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>> /usr/lib64 |
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>> /usr/lib64/libpng12.so.0 |
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>> /usr/share |
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>> /usr/share/doc |
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>> /usr/share/doc/libpng-1.2.50-r1 |
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>> /usr/share/doc/libpng-1.2.50-r1/CHANGES.bz2 |
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>> /usr/share/doc/libpng-1.2.50-r1/README.bz2 |
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>> /usr/share/doc/libpng-1.2.50-r1/TODO.bz2 |
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>> |
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>> Any idea on how to solve this problem? Some how it should be possible |
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>> maybe not using the system lib like I did with cmake but I can't |
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>> figure it out how to do it with autoconf/automake. |
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>> |
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>> Thank you, |
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>> Quim |
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>> |
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>> |
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>> [1] |
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>> http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/x11-libs/fltk/fltk-1.1.10.ebuild?view=log |
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>> |
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> The libpng slots, apart from "0", only install the shared library files, |
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> not the headers. They are intended for compatibility with old binaries |
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> for which no source code is available, not for building new software. |
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> |
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> Afaik the common opinion is that different libpng versions are mostly |
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> source compatible, and minor patching to other things is preferable to |
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> inventing a non-standard way to make the libpng implementation |
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> switchable at build-time. |
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> |
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> Is there a reason you can not use fltk-1.1.10-r2.ebuild [1] in stead, |
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> which incorporates a patch [2] for libpng-1.5 (which probably still |
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> works with 1.6), as well as various other fixes? |
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> |
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> 1: |
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> http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/x11-libs/fltk/fltk-1.1.10-r2.ebuild |
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> 2: |
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> http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/x11-libs/fltk/files/fltk-1.1.10-libpng15.patch |
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> |
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I didn't know about this patch, this should make the job. |
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