Use strace on the process to see under what paths it is looking for
your libraries. Look for a bunch of stat() and open() calls to
filenames ending with your library name (eg: libag_core).
You might also want to check that your ldconfig is set up properly
(for libraries you've installed yourself, distros are usually pretty
good about that kind of thing). Run ldconfig -p to print a full
listing of the candidates in the cache.
Recap: trying to access two libs within rakudo/parrot, viz., libag_core
and libag_gui. Both generated from same tarball, both installed in
/usr/local/lib
Ran ldconfig under sudo. Checked output of ldconfig -p, and both shown
as being in /usr/local/lib.
Ran strace on rakudo test file that tries to access libag_core and
libag_gui (see program and edited traced dump below).
Essentially parrot checks /usr/local/lib for libag_core, but does NOT
check /usr/local/lib for libag_gui and so cannot find it.
This is looking less like a lib configuration problem and more like a
parrot bug. What can I do next to help locate problem?
perl6 program (lib_test.p6):
#!perl6
my $lib;
for <libag_core lib_gui> {
$lib = pir::loadlib__Ps($_);
.print; print(' -> ',$lib);
' NOT'.print unless $lib;
say ' located';
}
edited tdump generated by
strace perl6 ./lib-test > tdump 2>&1
I deleted perl6 parts, highlighted with extra lines where
/usr/local/lib/libag_core is found, deleted irrelevant failed directory
search
tdump:
<snip>
stat64("dynext/libag_core.so", 0xbfe10fb0) = -1 ENOENT (No such file or
directory)
stat64("/home/richard/development/rakudo/parrot_install/dynext/libag_core.so",
0xbfe10fb0) = -1 ENOENT (No such file or directory)
stat64("/home/richard/development/rakudo/parrot_install/lib/2.10.1-devel/dynext/libag_core.so",
0xbfe10fb0) = -1 ENOENT (No such file or directory)
stat64("libag_core.so", 0xbfe11000) = -1 ENOENT (No such file or
directory)
open("/home/richard/development/rakudo/parrot_install/lib/libag_core.so", O_RDONLY)
= -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=93231, ...}) = 0
mmap2(NULL, 93231, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb722f000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/libag_core.so", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\0g\0\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=221955, ...}) = 0
mmap2(NULL, 196900, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x497000
mmap2(0x4c5000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2d) = 0x4c5000
mmap2(0x4c7000, 292, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4c7000
close(3) = 0
mprotect(0x4c5000, 4096, PROT_READ) = 0
munmap(0xb722f000, 93231) = 0
write(1, "libag_core", 10libag_core) = 10
write(1, " -> ", 4 -> ) = 4
write(1, "libag_core", 10libag_core) = 10
write(1, " located", 8 located) = 8
write(1, "\n", 1
) = 1
stat64("dynext/lib_gui.so", 0xbfe10fb0) = -1 ENOENT (No such file or
directory)
stat64("/home/richard/development/rakudo/parrot_install/dynext/lib_gui.so",
0xbfe10fb0) = -1 ENOENT (No such file or directory)
stat64("/home/richard/development/rakudo/parrot_install/lib/2.10.1-devel/dynext/lib_gui.so",
0xbfe10fb0) = -1 ENOENT (No such file or directory)
stat64("lib_gui.so", 0xbfe11000) = -1 ENOENT (No such file or
directory)
open("/home/richard/development/rakudo/parrot_install/lib/lib_gui.so",
O_RDONLY) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=93231, ...}) = 0
mmap2(NULL, 93231, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb722f000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/tls/i686/sse2/cmov/lib_gui.so", O_RDONLY) = -1 ENOENT (No
such file or directory)
stat64("/lib/tls/i686/sse2/cmov", 0xbfe10a04) = -1 ENOENT (No such file
or directory)
open("/lib/tls/i686/sse2/lib_gui.so", O_RDONLY) = -1 ENOENT (No such
file or directory)
stat64("/lib/tls/i686/sse2", 0xbfe10a04) = -1 ENOENT (No such file or
directory)
open("/lib/tls/i686/cmov/lib_gui.so", O_RDONLY) = -1 ENOENT (No such
file or directory)
<snip> <lots and lots of lib directories>
open("/usr/lib/i486-linux-gnu/lib_gui.so", O_RDONLY) = -1 ENOENT (No
such file or directory)
stat64("/usr/lib/i486-linux-gnu", 0xbfe10a04) = -1 ENOENT (No such file
or directory)
munmap(0xb722f000, 93231) = 0
stat64("dynext/lib_gui", 0xbfe10fb0) = -1 ENOENT (No such file or
directory)
stat64("/home/richard/development/rakudo/parrot_install/dynext/lib_gui",
0xbfe10fb0) = -1 ENOENT (No such file or directory)
stat64("/home/richard/development/rakudo/parrot_install/lib/2.10.1-devel/dynext/lib_gui",
0xbfe10fb0) = -1 ENOENT (No such file or directory)
stat64("lib_gui", 0xbfe11000) = -1 ENOENT (No such file or
directory)
write(1, "lib_gui", 7lib_gui) = 7
write(1, " -> ", 4 -> ) = 4
write(1, " NOT", 4 NOT) = 4
write(1, " located", 8 located) = 8
write(1, "\n", 1
) = 1
<snip>
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