[Scons-users] InstallVersionedLib should respect SONAME variable

[Andrew C. Morrow]

Any thoughts on this? Should I open an issue on the GitHub project?

On Fri, Nov 16, 2018 at 11:36 AM Andrew C. Morrow <andrew.c.morrow at gmail.com>
wrote:

>
> Hi -
>
> The current implementation of InstallVersionedLib in SCons 3.0.1 does not
> consult the SONAME variable from the target that is being installed.
>
> This means that if you have a SharedLibrary which sets both SONAME and
> SHLIBVERSION, the resulting installed symlinks are not correct:
>
> env = Environment()
>
> libDS = env.SharedLibrary(
>     target='libds',
>     source=[
>         'libds.cpp',
>     ],
>     SHLIBVERSION="1.2.3",
>     SONAME="libds.so.10",
> )
>
> env.InstallVersionedLib(
>     target='install/lib',
>     source = libDS,
> )
>
> $ scons
> g++ -o libds.os -c -fPIC libds.cpp
> g++ -o libds.so.1.2.3 -shared -Wl,-Bsymbolic -Wl,-soname=libds.so.10
> libds.os
> Create symlinks for: 'libds.so.1.2.3': '*libds.so.1*'->'libds.so.1.2.3',
> 'libds.so'->'libds.so.1.2.3'
> Install file: "libds.so.1.2.3" as "install/lib/libds.so.1.2.3"
>
> The soname symlink here should be 'libds.so.*10*'->'libds.so.1.2.3',
>
> I think the default behavior of InstallVersionedLib, where it assumes the
> major-est version number of the library version sets the ABI, seems pretty
> reasonable. But I think there are legitimate cases where the ABI version
> may need to be set independently, and InstallVersionedLib should probably
> respect that when it happens.
>
> Two notes to go along with that:
>
> - The default of linking with -Bsymbolic (set in the gnulink tool) seems
> questionable to me. That choice isn't always correct, and it should be left
> to the user to decide.
>
> - It would be nice if there were a way for SONAME to not need to
> reiterate the full library name with the SHLIBPREFIX and SHLIBSUFFIX.
> Perhaps we need a new variable SOVERSION which takes a number (or string
> for macOS dylibs that like to use versions like 'b'), and interpolates it
> into an appropriate target specific file name.
>
> Thanks,
> Andrew
>
>
>
>
>
>
>
>
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