On Wed, 14 Oct 2009, Mats Erik Andersson wrote:
I inserted two printouts, immediately surrounding realloc():
fprintf(stderr, "Will enter realloc().\n");
ptr = realloc(ptrold, 1024)
fprintf(stderr, "Has exited realloc().\n");
Only the first statement gets printed.
Please try to attach to the hung gcc process with gdb and get a backtrace.top should show you the kernel function, in which the process is sleeping (WCHAN field).
The "Alt-SysRq-l" Magic SysRq combination should dump a kernel backtrace of all currently executing tasks into the syslog (see [0] and [1]).
These could help at least in filing a bug report. Cheers, lacos [0] http://lxr.linux.no/#linux+v2.6.31/Documentation/sysrq.txt [1] http://en.wikipedia.org/wiki/Magic_SysRq_key#Magic_commands