[FFmpeg-trac] #4183(build system:open): Compilation problem with libav*

[FFmpeg]

#4183: Compilation problem with libav*
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             Reporter:  JohnCC       |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  build
              Version:  git-master   |  system
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Comment (by JohnCC):

 There is '-' missing in your command. I suppose that is a typo?

 If doing:

 ./configure --prefix=/usr --libdir=/usr/lib64  --enable-shared --enable-
 static

 Then the installation is still wrong:

 {{{
 install -m 644 libavcodec/libavcodec.a "/usr/lib64"
 ranlib "/usr/lib64/libavcodec.a"
 mkdir -p "/usr/lib"
 install -m 755 libavcodec/libavcodec.so "/usr/lib/libavcodec.so.56.14.100"
 strip "/usr/lib/libavcodec.so.56.14.100"
 }}}

 And with your 'Quite interesting' suggestion (though with the --libdir
 corrected), I get:


 {{{
 mkdir -p "/usr/lib64"
 install -m 644 libavcodec/libavcodec.a "/usr/lib64"
 ranlib "/usr/lib64/libavcodec.a"
 mkdir -p "/usr/local/lib"
 install -m 755 libavcodec/libavcodec.so
 "/usr/local/lib/libavcodec.so.56.14.100"
 strip "/usr/local/lib/libavcodec.so.56.14.100"
 (cd "/usr/local/lib" && ln -s -f libavcodec.so.56.14.100
 libavcodec.so.56); (cd "/usr/local/lib" && ln -s -f libav

 }}}

 So, the static libraries are following the --libdir=/usr/lib64
 instruction, and the shared libs go into the default /usr/local/lib
 directory.

 I get the instruction --shlibdir=DIR - thanks for that. I do not think
 this is a very well-known configure option. In all the years I use Linux,
 I never used it. I just went through the configures from glib/goocanvas
 /gobject-introspection, and about 10 more. None has it.

 ''I'd suggest a slight modification to the configure script: If --libdir
 is specified, and --shlibdir is not, then set both to the same value. I
 suspect that is by far the most common case.''

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4183#comment:4>
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