yay, build complete. Now what ?
Dennis Clarke
dclarke at blastwave.org
Tue Jan 29 19:42:30 PST 2013
> > > set LD_LIBRARY_PATH to $prefix/lib
> >
> > That there looks like a build error. One should never, ever, need
> to specify LD_IBRARY_PATH in order to run a binary in some location
> like /opt/foo. The RPATH *should* be in the binary itself.
> >
> > Otherwise there is no promise that the binary will operate as
> expected.
>
> fwiw, both debian and fedora discourage the use of RPATH
>
> http://wiki.debian.org/RpathIssue
> http://fedoraproject.org/wiki/Packaging:Guidelines#Beware_of_Rpath
>
For no better reason than "because I could" I went back and did a rebuild but this time with an RPATH of /opt/xorg/lib in the output bins :
aster $ readelf -d /opt/xorg/bin/xlsatoms
Dynamic section at offset 0x1a80 contains 23 entries:
Tag Type Name/Value
0x0000000000000001 (NEEDED) Shared library: [libxcb.so.1]
0x0000000000000001 (NEEDED) Shared library: [libc.so.6]
0x000000000000000f (RPATH) Library rpath: [/opt/xorg/lib]
0x000000000000000c (INIT) 0x400a70
0x000000000000000d (FINI) 0x4016b8
0x0000000000000004 (HASH) 0x400260
0x000000006ffffef5 (GNU_HASH) 0x400328
0x0000000000000005 (STRTAB) 0x400648
0x0000000000000006 (SYMTAB) 0x400360
0x000000000000000a (STRSZ) 394 (bytes)
0x000000000000000b (SYMENT) 24 (bytes)
0x0000000000000015 (DEBUG) 0x0
0x0000000000000003 (PLTGOT) 0x601c50
0x0000000000000002 (PLTRELSZ) 528 (bytes)
0x0000000000000014 (PLTREL) RELA
0x0000000000000017 (JMPREL) 0x400860
0x0000000000000007 (RELA) 0x400830
0x0000000000000008 (RELASZ) 48 (bytes)
0x0000000000000009 (RELAENT) 24 (bytes)
0x000000006ffffffe (VERNEED) 0x400810
0x000000006fffffff (VERNEEDNUM) 1
0x000000006ffffff0 (VERSYM) 0x4007d2
0x0000000000000000 (NULL) 0x0
The result is that LD_LIBRARY_PATH is not required and there is no way for this bin
to accidentally pick up a system provided lib. I guess there may be a way around
that, but it would mean the user did something on purpose to make that happen.
aster $ ldd /opt/xorg/bin/xlsatoms
linux-vdso.so.1 => (0x00007fff66b44000)
libxcb.so.1 => /opt/xorg/lib/libxcb.so.1 (0x00007f0d4ddc8000)
libc.so.6 => /lib/libc.so.6 (0x00007f0d4da62000)
libXau.so.6 => /opt/xorg/lib/libXau.so.6 (0x00007f0d4d85e000)
libXdmcp.so.6 => /opt/xorg/lib/libXdmcp.so.6 (0x00007f0d4d658000)
/lib64/ld-linux-x86-64.so.2 (0x00007f0d4dff2000)
dc
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