On 16 November 2010 18:10, Anthony Liguori <anth...@codemonkey.ws> wrote: > On 11/16/2010 11:43 AM, Peter Maydell wrote: >> Unfortunately these commits: >> 2834c3e Add support for generating a systemtap tapset static probes >> 4addb11 Add a DTrace tracing backend targetted for SystemTAP compatability > > What's your configure output?
I've attached it; the trace related bits are: Trace backend nop Trace output file trace-<pid> > I don't have the right environment to build with systemtap support, but > --trace-backend=nop should work regardless. I'm using the nop backend, yes. I think the problem is that commit 2834c3e adds a target 'trace:' to the Makefile.target which looks like it's intended to be a phony target. However it isn't marked as such, so make actually tries to create a binary 'trace' by falling back to its default rules (since there's a "trace.c" in the root directory): petma...@linaroe102767:~/qemu-test/qemu/i386-softmmu$ make -n trace echo " CC trace.o" && gcc -I/home/petmay01/qemu-test/qemu/slirp -Werror -m64 -I. -I/home/petmay01/qemu-test/qemu -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wendif-labels -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fstack-protector-all -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-declaration -Wold-style-definition -Wtype-limits -DHAS_AUDIO -DHAS_AUDIO_CHOICE -I/home/petmay01/qemu-test/qemu/fpu -I/home/petmay01/qemu-test/qemu/tcg -I/home/petmay01/qemu-test/qemu/tcg/i386 -DTARGET_PHYS_ADDR_BITS=32 -I.. -I/home/petmay01/qemu-test/qemu/target-i386 -DNEED_CPU_H -MMD -MP -MT trace.o -MF ./trace.d -O2 -g -c -o trace.o /home/petmay01/qemu-test/qemu/trace.c echo " LINK trace" && gcc -I/home/petmay01/qemu-test/qemu/slirp -Werror -m64 -I. -I/home/petmay01/qemu-test/qemu -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wendif-labels -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fstack-protector-all -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-declaration -Wold-style-definition -Wtype-limits -DHAS_AUDIO -DHAS_AUDIO_CHOICE -I/home/petmay01/qemu-test/qemu/fpu -I/home/petmay01/qemu-test/qemu/tcg -I/home/petmay01/qemu-test/qemu/tcg/i386 -DTARGET_PHYS_ADDR_BITS=32 -I.. -I/home/petmay01/qemu-test/qemu/target-i386 -DNEED_CPU_H -O2 -g -Wl,--warn-common -m64 -g -o trace trace.o -lrt -lpthread -lutil -lcurl -lncurses -luuid -lpng -lsasl2 -lgnutls -lSDL -lX11 -laio -lm -lz ...and linking only trace.o into a binary 'trace' fails because trace.c doesn't have a main() (or indeed any functions at all). If I add a ".PHONY: trace" or change the "trace" target name to "tracexyzzy" then this fixes the problem. -- PMM
configure.out
Description: Binary data
