On 03/21/13 14:06, James Lee wrote:
$ truss ./a.out 2>&1 | egrep 'open.*(libc|libgcc)'
open("/opt/XXXX/lib/64/libgcc_s.so.1", O_RDONLY) = 3
open("/lib/64/libc.so.1", O_RDONLY) = 3
I'm opening libc second.
Well, same for me:
$ ls /cores
$ truss ./a-4.7 2>&1 | egrep 'open.*(libc|libgcc)'
open("/opt/csw/lib/64/libgcc_s.so.1", O_RDONLY) = 3
open("/lib/64/libc.so.1", O_RDONLY) = 3
$ ls /cores/
a-4.7.18296
$
I have self-built GCC-4.8 that doesn't have this problem.
Checking libstdc++ there and from /opt/csw/lib/amd64
$ elfdump -d /opt/csw/lib/amd64/libstdc++.so
Dynamic Section: .dynamic
index tag value
[0] POSFLAG_1 0x1 [ LAZY ]
[1] NEEDED 0x26bb7 libm.so.2
[2] NEEDED 0x26bca libc.so.1
[3] POSFLAG_1 0x1 [ LAZY ]
[4] NEEDED 0x26c1f libgcc_s.so.1
[5] INIT 0xd71a0
[6] FINI 0xd71b0
[7] SONAME 0x26ba8 libstdc++.so.6
[8] RUNPATH 0x26c47 /opt/csw/lib/$ISALIST:/opt/csw/lib
[9] RPATH 0x26c47 /opt/csw/lib/$ISALIST:/opt/csw/lib
[10] HASH 0x213b8
[11] STRTAB 0x3eac0
[12] STRSZ 0x26e6a
[13] SYMTAB 0x28980
[14] SYMENT 0x18
[15] CHECKSUM 0x3572
[16] VERDEF 0x65a10
[17] VERDEFNUM 0x1b
[18] VERNEED 0x65930
[19] VERNEEDNUM 0x3
[20] RELACOUNT 0x23c
[21] PLTRELSZ 0x4098
[22] PLTREL 0x7
[23] JMPREL 0x777f0
[24] RELA 0x67b30
[25] RELASZ 0x13d58
[26] RELAENT 0x18
[27] SYMINFO 0x1d8d8
[28] SYMINSZ 0x3ae0
[29] SYMINENT 0x4
[30] FLAGS 0 0
[31] FLAGS_1 0 0
[32] SUNW_STRPAD 0x200
[33] SUNW_LDMACH 0x3e EM_AMD64
[34] PLTGOT 0x10f070
[35-45] NULL 0
$ elfdump -d /opt/gcc-4.8/lib/amd64/libstdc++.so
Dynamic Section: .dynamic
index tag value
[0] NEEDED 0x26d9f libm.so.2
[1] NEEDED 0x26dbb libc.so.1
[2] NEEDED 0x26dfb libgcc_s.so.1
[3] INIT 0xd2b40
[4] FINI 0xd2b50
[5] SONAME 0x26d90 libstdc++.so.6
[6] HASH 0x1e0a0
[7] STRTAB 0x3b9d0
[8] STRSZ 0x27023
[9] SYMTAB 0x25710
[10] SYMENT 0x18
[11] CHECKSUM 0xf96f
[12] VERDEF 0x62ad8
[13] VERDEFNUM 0x1d
[14] VERNEED 0x629f8
[15] VERNEEDNUM 0x3
[16] RELACOUNT 0x230
[17] PLTRELSZ 0x3d68
[18] PLTREL 0x7
[19] JMPREL 0x74830
[20] RELA 0x64c60
[21] RELASZ 0x13938
[22] RELAENT 0x18
[23] FLAGS 0 0
[24] FLAGS_1 0 0
[25] SUNW_STRPAD 0x200
[26] SUNW_LDMACH 0x3e EM_AMD64
[27] PLTGOT 0x10b710
[28-38] NULL 0
I.e. no LAZY for libm.so.1 and libgcc_s.so.1 and no RPATH/RUNPATH set.
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