dlopen() and -pg

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

Hello,
trying to profile a c++ program which uses dlopen and pthreads (opencpn, FWIW),
I get a core dump:
Program received signal SIGSEGV, Segmentation fault.                           
0x006fb040 in dl_iterate_phdr ()                                               
(gdb) where                                                                    
#0  0x006fb040 in dl_iterate_phdr ()                                           
#1  0x006fd7d0 in __libc_static_tls_setup ()                                   
#2  0x007d5d20 in _libc_init ()
#3  0x7bb33844 in _rtld_call_function_void (obj=0x6d42c000, addr=8215716)
    at /usr/src/libexec/ld.elf_so/rtld.h:488
#4  _rtld_call_initfini_function (obj=0x6d42c000, mask=<optimized out>,
    func=8215716) at /usr/src/libexec/ld.elf_so/rtld.c:143
#5  _rtld_call_init_function (cur_objgen=<optimized out>,
    mask=<optimized out>, obj=0x6d42c000)
    at /usr/src/libexec/ld.elf_so/rtld.c:258
#6  _rtld_call_init_functions (mask=mask@entry=0x7ffd4480)
    at /usr/src/libexec/ld.elf_so/rtld.c:316
#7  0x7bb3442c in _rtld (sp=<optimized out>, relocbase=<optimized out>)
    at /usr/src/libexec/ld.elf_so/rtld.c:782
#8  0x7bb305b4 in _rtld_start () from /usr/libexec/ld.elf_so
#9  0x7bb305b4 in _rtld_start () from /usr/libexec/ld.elf_so
#10 0x7bb305b4 in _rtld_start () from /usr/libexec/ld.elf_so
#11 0x7bb305b4 in _rtld_start () from /usr/libexec/ld.elf_so
#12 0x7bb305b4 in _rtld_start () from /usr/libexec/ld.elf_so
#13 0x7bb305b4 in _rtld_start () from /usr/libexec/ld.elf_so
#14 0x7bb305b4 in _rtld_start () from /usr/libexec/ld.elf_so
#15 0x7bb305b4 in _rtld_start () from /usr/libexec/ld.elf_so
[...]
(here it seems to be looping on _rtld_start(), but it may be a debugger issue).

This is on 9.0_BETA; the above stack trace is on earmv7hf but I get the
same on x86_64.

A hello world c++ program works as expected

Any idea ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--