The issue is that for some reason it gets libpthread.so.0 referenced
but not listed as in a.out NEDED section
1. Conpile std::string s; commented out, it works, do objdump -pR a.out
Dynamic Section:
NEEDED libGL.so.1
NEEDED libc.so.6
Version References:
required from libc.so.6:
0x09691a75 0x00 02 GLIBC_2.2.5
2. Do same thing the std::string line active , notice that libpthreas.so.0 is
not NEEDED but it is in version referennces and there is __pthread_key_create
symbol and you got the bug
Dynamic Section:
NEEDED libGL.so.1
NEEDED libstdc++.so.6
NEEDED libgcc_s.so.1
NEEDED libc.so.6
Version References:
required from libgcc_s.so.1:
0x0b792650 0x00 06 GCC_3.0
required from libpthread.so.0:
0x09691a75 0x00 04 GLIBC_2.2.5
required from libc.so.6:
0x09691a75 0x00 03 GLIBC_2.2.5
required from libstdc++.so.6:
0x056bafd3 0x00 05 CXXABI_1.3
0x08922974 0x00 02 GLIBCXX_3.4
DYNAMIC RELOCATION RECORDS
OFFSET TYPE VALUE
0000000000600ff8 R_X86_64_GLOB_DAT __gmon_start__
0000000000601018 R_X86_64_JUMP_SLOT _ZNSsC1Ev
0000000000601020 R_X86_64_JUMP_SLOT glEnable
0000000000601028 R_X86_64_JUMP_SLOT __gmon_start__
0000000000601030 R_X86_64_JUMP_SLOT __libc_start_main
0000000000601038 R_X86_64_JUMP_SLOT _ZNSsD1Ev
0000000000601040 R_X86_64_JUMP_SLOT __pthread_key_create
3. Add call to pthread , it woirks again
#include <pthread.h>
#include <string>
#include <GL/gl.h>
int main(int argc, char *argv[]) {
std::string s;
glEnable(GL_LIGHT0);
int i=pthread_getconcurrency();
}
And objdump looks now
Dynamic Section:
NEEDED libGL.so.1
NEEDED libstdc++.so.6
NEEDED libgcc_s.so.1
NEEDED libpthread.so.0
NEEDED libc.so.6
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https://bugs.launchpad.net/bugs/1248642
Title:
dynamic library inconsistencies with OpenGL/C++
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