Discussion :

[ikuzar]

Bonjour,

Je travaille sur Ubuntu 10.04 x86_64 et eclipse Juno. Dans la configuration d'eclipse (properties -> C/C++ build -> settings), j'ai bien (dans l'ordre) /usr/local/lib et /usr/lib dans la partie "librairy search path". Je code en C.

Quant je lance mon executable, j'obtiens l'erreur suivante:

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error while loading shared libraries: libtcmalloc.so.0: cannot open shared object file: No such file or directory

Et pourtant j'ai bien la librarie dans /usr/local/lib/libtcmalloc.so.0

résultat d'un ldd :

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linux-vdso.so.1 =>  (0x00007fff91518000)
	libtcmalloc.so.0 => not found
	libprofiler.so.0 => not found
	libmysqlclient_r.so.16 => /usr/lib/libmysqlclient_r.so.16 (0x00007f256bbd8000)
	libm.so.6 => /lib/libm.so.6 (0x00007f256b955000)
	libpthread.so.0 => /lib/libpthread.so.0 (0x00007f256b738000)
	libc.so.6 => /lib/libc.so.6 (0x00007f256b3b4000)
	libcrypt.so.1 => /lib/libcrypt.so.1 (0x00007f256b17b000)
	libnsl.so.1 => /lib/libnsl.so.1 (0x00007f256af61000)
	libz.so.1 => /lib/libz.so.1 (0x00007f256ad49000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f256bffa000)

Comment se fait-il que la librairie est présente et qu'elle n'est pas trouvée pas le linker ?

Merci d'avance pour votre aide.

[ikuzar]

Voici le résultat d'un strace sur l'executable :

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access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3f25b5d000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=52416, ...}) = 0
mmap(NULL, 52416, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f3f25b50000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/tls/x86_64/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/lib/tls/x86_64", 0x7fffb771f890) = -1 ENOENT (No such file or directory)
open("/lib/tls/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/lib/tls", 0x7fffb771f890)        = -1 ENOENT (No such file or directory)
open("/lib/x86_64/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/lib/x86_64", 0x7fffb771f890)     = -1 ENOENT (No such file or directory)
open("/lib/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/lib", {st_mode=S_IFDIR|0755, st_size=12288, ...}) = 0
open("/usr/lib/tls/x86_64/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/usr/lib/tls/x86_64", 0x7fffb771f890) = -1 ENOENT (No such file or directory)
open("/usr/lib/tls/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/usr/lib/tls", 0x7fffb771f890)    = -1 ENOENT (No such file or directory)
open("/usr/lib/x86_64/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/usr/lib/x86_64", 0x7fffb771f890) = -1 ENOENT (No such file or directory)
open("/usr/lib/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/usr/lib", {st_mode=S_IFDIR|0755, st_size=53248, ...}) = 0
open("/lib/x86_64-linux-gnu/tls/x86_64/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/lib/x86_64-linux-gnu/tls/x86_64", 0x7fffb771f890) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/tls/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/lib/x86_64-linux-gnu/tls", 0x7fffb771f890) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/x86_64/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/lib/x86_64-linux-gnu/x86_64", 0x7fffb771f890) = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/lib/x86_64-linux-gnu", 0x7fffb771f890) = -1 ENOENT (No such file or directory)
open("/usr/lib/x86_64-linux-gnu/tls/x86_64/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/usr/lib/x86_64-linux-gnu/tls/x86_64", 0x7fffb771f890) = -1 ENOENT (No such file or directory)
open("/usr/lib/x86_64-linux-gnu/tls/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/usr/lib/x86_64-linux-gnu/tls", 0x7fffb771f890) = -1 ENOENT (No such file or directory)
open("/usr/lib/x86_64-linux-gnu/x86_64/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/usr/lib/x86_64-linux-gnu/x86_64", 0x7fffb771f890) = -1 ENOENT (No such file or directory)
open("/usr/lib/x86_64-linux-gnu/libtcmalloc.so.0", O_RDONLY) = -1 ENOENT (No such file or directory)
stat("/usr/lib/x86_64-linux-gnu", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0

J'ai l'impression que le linker cherche dans des endroits bizarre pour trouver le libtcmalloc.so.0 ...

un ldconfig -p | grep "libtcmalloc.so.0" ne trouve rien ...

[ikuzar]

Le programme tourne quand je fais un:
export LD_LIBRARY_PATH="/usr/local/lib/"

Mais la "vraie" solution je ne la trouve pas ...(sans utiliser LD_LIBRARY_PATH)

[ikuzar]

Personne n'a aucune idée ?