Re: [gentoo-user] libpcre && blender: Confusion?

Meino.Cramer@×××.de wrote:

> Alan McKinnon <alan.mckinnon@×××××.com> [15-12-06 08:24]:
> > On 06/12/2015 05:47, Meino.Cramer@×××.de wrote:
> > > Hi,
> > >
> > > from builder.blender.org I regularily download the daily
> > > developers build of blender.
> > >
> > > In the last few days the developers seem to include code to access
> > > libpcre into blender -- which will not be found on my system.
> > >
> > > eix says:
> > > #>eix libpcre
> > > [I] dev-libs/libpcre
> > >      Available versions:  (3) 7.9-r1 8.35 8.36 ~8.37-r2 8.38
> > >        {bzip2 +cxx doc +jit libedit pcre16 pcre32 +readline
> > > +recursion-limit static-libs unicode zlib ABI_MIPS="n32 n64 o32"
> > > ABI_PPC="32 64" ABI_S390="32 64" ABI_X86="32 64 x32"} Installed
> > > versions:  8.38(3)(17:22:37 11/26/15)(bzip2 cxx jit pcre16
> > > readline recursion-limit unicode zlib -libedit -pcre32
> > > -static-libs ABI_MIPS="-n32 -n64 -o32" ABI_PPC="-32 -64"
> > > ABI_S390="-32 -64" ABI_X86="64 -32 -x32") Homepage:
> > > http://www.pcre.org/ Description:         Perl-compatible regular
> > > expression library
> > >
> > > For me it reads as if libpcre-8.38 is included, which is version
> > > "3" (due to the litlle "(3)").
> > >
> > > ldd blender says:
> > > #>ldd blender
> > > 	linux-vdso.so.1 (0x00007f58c1f2f000)
> > > 	librt.so.1 => /lib64/librt.so.1 (0x00007f58c1b08000)
> > > 	libfreetype.so.6 => /usr/lib64/libfreetype.so.6
> > > (0x00007f58c185d000) libpthread.so.0 => /lib64/libpthread.so.0
> > > (0x00007f58c1641000) libpcre.so.3 => not found
> > > 	libxml2.so.2 => /usr/lib64/libxml2.so.2
> > > (0x00007f58c12d6000) libGLU.so.1 => /usr/lib64/libGLU.so.1
> > > (0x00007f58c1053000) libGL.so.1
> > > => /usr/lib64/opengl/nvidia/lib/libGL.so.1 (0x00007f58c0d1f000)
> > > libX11.so.6 => /usr/lib64/libX11.so.6 (0x00007f58c09d8000)
> > > libXi.so.6 => /usr/lib64/libXi.so.6 (0x00007f58c07c7000)
> > > libXxf86vm.so.1 => /usr/lib64/libXxf86vm.so.1
> > > (0x00007f58c05c1000) libutil.so.1 => /lib64/libutil.so.1
> > > (0x00007f58c03be000) libdl.so.2 => /lib64/libdl.so.2
> > > (0x00007f58c01ba000) libc.so.6 => /lib64/libc.so.6
> > > (0x00007f58bfe1b000) /lib64/ld-linux-x86-64.so.2
> > > (0x00007f58c1d10000) libm.so.6 => /lib64/libm.so.6
> > > (0x00007f58bfb17000) libstdc++.so.6
> > > => /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/libstdc++.so.6
> > > (0x00007f58bf803000) libgcc_s.so.1
> > > => /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/libgcc_s.so.1
> > > (0x00007f58bf5ec000) libz.so.1 => /lib64/libz.so.1
> > > (0x00007f58bf3d6000) libbz2.so.1 => /lib64/libbz2.so.1
> > > (0x00007f58bf1c6000) libpng16.so.16 => /usr/lib64/libpng16.so.16
> > > (0x00007f58bef90000) libnvidia-tls.so.358.16
> > > => /usr/lib64/libnvidia-tls.so.358.16 (0x00007f58bed8c000)
> > > libnvidia-glcore.so.358.16
> > > => /usr/lib64/libnvidia-glcore.so.358.16 (0x00007f58bd12b000)
> > > libXext.so.6 => /usr/lib64/libXext.so.6 (0x00007f58bcf18000)
> > > libxcb.so.1 => /usr/lib64/libxcb.so.1 (0x00007f58bccf4000)
> > > libXau.so.6 => /usr/lib64/libXau.so.6 (0x00007f58bcaf0000)
> > > libXdmcp.so.6 => /usr/lib64/libXdmcp.so.6 (0x00007f58bc8ea000)
> > >
> > >
> > > Before I screw up the library pool with a quick and dirty symlink
> > > based on my assumption above...I better ask... :)
> > >
> > > What exactly is libpcre.so.3 or for what stands it for?
> > > Is the installed libpcre the one which is needed?
> > > How can I fix it?
> >
> > libpcre provides a regex library for apps to use. The version you
> > have will probably not work, as it is .so version 1 and blender
> > wants version 3. So a symlink is not the correct way to go.
> >
> > You are using the daily dev build so most likely those devs aren't
> > using Gentoo and do have libpcre.so.3 from somewhere.
> >
> > How critical is this error anyway? I can't imagine it would stop
> > blender from working entirely. Do you download a source or a binary
> > daily build?
> >
> > Some things to try:
> >
> > - symlink it anyway and see if the regex functions in blender now
> > work
> > - if blender is a binary download, search it's files for libpcre.so*
> > Maybe it's there and you just need to tweak LDPATH
> >
> > --
> > Alan McKinnon
> > alan.mckinnon@×××××.com
> >
> >
>
> The blender download is a binary blob. For a longer time I used to
> build blender myself from a daily snapshot of the repository, but
> this became more and more complicate and finally I gave up.
> I started to download the binaries directly from the build bot
> builder.blender.org.
> This works - until now.
> The error stops the start of blender.
> ldd gives "libprce.so.3 not found" (see above) indicating, that
> blender won't start at all.
> The binary blob does not contain any libpcre -- I checked that
> before.
>
> Well, I think I have to open a bugreport for Ton...
>
> Anyway: Thanks for your help, Alan!
> Best regards
> Meino

Version 8.3.8 is the latest version of pcre. The newer versions
available at http://www.pcre.org/ are for pcre2. The libraries 
from pcre2 are named libpcre2....
So it is unlikely that installation of pcre2 would resolve your
problem. 

As Alain said, try making a symlink. If it doesn't work, you can
remove it without problem.

--
Regards
wabe