On Sat, 10 Oct 2009, dave perry wrote: > With today's SimGear CVS, I am getting the following compile error > Making all in props > make[3]: Entering directory `/home/dad/source-osg/SimGear/simgear/props' > g++ -g -O2 -D_REENTRANT -lOpenThreads -o props_test props_test.o > libsgprops.a ../../simgear/xml/libsgxml.a ../../simgear/misc/libsgmisc.a > ../../simgear/debug/libsgdebug.a ../../simgear/structure/libsgstructure.a > props_test.o: In function `SGAtomic::operator--()': > /home/dad/source-osg/SimGear/simgear/props/../../simgear/structure/SGAtomic.hxx:60: > undefined reference to `__sync_sub_and_fetch_4'
Hi, This problem has been discussed on IRC but as far as I recall we didn't reach a certain solution. Can you try setting the target machine architecture? I use -march=core2 (appropriate for my box) and have not had this problem (but I have gcc 4.3.4). It seems possible that these intrinsic functions are only available when the target hardware can support them in a reasonable way. IIRC some of the basic atomic read-write operations were first introduced in the i486 while the default target for gcc is probably i386. Cheers, Anders -- --------------------------------------------------------------------------- Anders Gidenstam WWW: http://www.gidenstam.org/FlightGear/ ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
