Hello,
I've written an application which uses pthreads, but I've run in
to some portability issues between Linux and Solaris. So I decid
ed to try Pth. Great package indeed. But here is my show stopper:
pth_init() seg faults for me (pth 1.3.6, kernel 2.2.13/14, glibc
2.1).
I'm using autoconf (2.13), automake (1.4) and libtool (1.3.3) to
manage the build environment, and I've integrated the locally in
stalled pth (in /usr) in autoconf as per the instructions in the
pth manual page. While trying to isolate the problem, I prepared
the following elementary program:
#include <pth.h>
#include <stdlib.h>
#include <stdio.h>
int main(int argc, char *argv[]) {
pth_init();
fprintf(stderr, "pth initialized0);
exit(EXIT_SUCCESS);
}
which does not reference any of the application specific li
braries. The application links with tcl8.0, pthread (not pth),
and some application specific libraries. To prevent any possible
side effects of these libraries, I modified the link step to only
include operating system libraries:
gcc -g -O2 -I/usr/include -L/usr/lib -o .libs/testpth testpth.o \
-lcrypt -lm -ldl -lnsl -lm -ldl -lcrypt -lm -ldl -lpth -Wl,--rpath \
-Wl,/usr/local/lib -Wl,--rpath -Wl,/usr/lib:/lib:/lib
The generated binary .libs/testpth works OK, but when libtool is
used to execute it, libtool generates a new binary .libs/lt-
testpth which seg faults inside pthread_sighandler in the file
signals.c on line 86. I don't want to decide whether this is a
pth bug or someone else's fault.
When I link manually using
gcc -o testpth testpth.o -lpth
the resulting binary works as it is supposed to.
Comparing the output of ldd or strace for the two binaries
(testpth and lt-testpth) shows that testpth only maps the li
braries you would expect: /etc/ld.so.cache and
/usr/lib/libpth.so.13. The binary lt-testpth however links quite
a few other libraries, in particular libpthread.
I agree that this is probably rather a libtool problem than a pth
problem. However, pth routinely coexists with pthreads, so there
is a small chance that it knows how to work around the problem.
Is there any way to configure pth so that it can live in harmony
with linux pthreads?
Mit herzlichem Gruss
Andreas Mueller
--
Dr. Andreas Mueller, Beratung und Entwicklung
CH-6685 Bosco/Gurin Switzerland
Tel: +41 91 7607106 Fax: +41 91 7607107
[EMAIL PROTECTED]
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