Hi I have a fresh installation of openBSD 4.9-release where the sample code of the graphviz library fails. It also fails on openBSD 4.8 but works perfectly on 4.7/Ubuntu/Debian/FreeBSD/etc.
How to get the error: Install graphviz: # export PKG_PATH="http://mirror.switch.ch/ftp/pub/OpenBSD/4.9/packages/i386/"; # pkg_add -r graphviz Creating the file sample.c with this content (http://www.graphviz.org/pdf/libguide.pdf, found at page 40): #include <gvc.h> int main(int argc, char **argv) { GVC_t *gvc; graph_t *g; FILE *fp; gvc = gvContext(); if (argc > 1) fp = fopen(argv[1], "r"); else fp = stdin; g = agread(fp); gvLayout(gvc, g, "dot"); gvRender(gvc, g, "plain", stdout); gvFreeLayout(gvc, g); agclose(g); return (gvFreeContext(gvc)); } Compile it (like shown in the example Makefile on page 39): $ gcc -o sample sample.c `pkg-config --libs --cflags libgvc` Run it: $ ulimit -c unlimited $ echo "graph G{node1;}"|./sample ./sample:/usr/local/lib/libgthread-2.0.so.2600.0: undefined symbol 'pthread_getschedparam' lazy binding failed! Segmentation fault (core dumped) Backtrace: $ gdb sample sample.core (gdb) bt #0 0x01deb370 in _dl_bind () from /usr/libexec/ld.so #1 0x01de7b87 in _dl_bind_start () from /usr/libexec/ld.so #2 0x7c9a7628 in ?? () #3 0x00000050 in ?? () #4 0xcfbe0033 in ?? () #5 0x01de0033 in ?? () #6 0x00000000 in ?? () The workaround I use for now is to link the program sample directly against pthread: $ gcc -o sample sample.c `pkg-config --libs --cflags libgvc` -pthread I have found a commit to the ports which does exactly this for the dot tool (without this patch it fails like the code above): http://www.openbsd.org/cgi-bin/cvsweb/ports/math/graphviz/patches/patch-cmd_dot_Makefile_in?rev=1.1;content-type=text%2Fx-cvsweb-markup Now I am wondering it I did something wrong or if there is a problem with openBSD 4.8 and 4.9. Regards, Reto
