STEPS TO REPRODUCE (on Mac: 1) Pull current tip m-c (in my case I'm on rev d11c29c1db3a). 2) Try to build (debug in my case) EXPECTED RESULTS: Things build ACTUAL RESULTS: 0:01.29 Undefined symbols for architecture x86_64: 0:01.29 "mozilla::PrintfTarget::vprint(char const*, __va_list_tag*)", referenced from: 0:01.29 char* mozilla::Smprintf<mozilla::MallocAllocPolicy>(char const*, ...) in SdpHelper.o 0:01.29 ld: symbol(s) not found for architecture x86_64 0:01.29 clang: error: linker command failed with exit code 1 (use -v to see invocation) 0:01.29 /Users/bzbarsky/mozilla/inbound/mozilla/config/rules.mk:627: recipe for target 'sdp_file_parser' failed Manishearth is seeing this too. The failing command line is: Executing: /opt/local/bin/ccache /Users/bzbarsky/bin/clang++ -std=gnu++11 -o sdp_file_parser -Qunused-arguments -Qunused-arguments -Wall -Wc++11-compat -Wempty-body -Wignored-qualifiers -Woverloaded-virtual -Wpointer-arith -Wsign-compare -Wtype-limits -Wunreachable-code -Wwrite-strings -Wno-invalid-offsetof -Wclass-varargs -Wloop-analysis -Wc++11-compat-pedantic -Wc++14-compat -Wc++14-compat-pedantic -Wc++1z-compat -Wimplicit-fallthrough -Wstring-conversion -Wthread-safety -Wno-inline-new-delete -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wformat -Wno-unknown-warning-option -Wno-return-type-c-linkage -fno-exceptions -fno-strict-aliasing -stdlib=libc++ -fno-rtti -fno-exceptions -fno-math-errno -pthread -pipe -gdwarf-2 -fno-omit-frame-pointer -Wl,-filelist,/Users/bzbarsky/mozilla/inbound/obj-firefox/media/webrtc/signaling/fuzztest/tmp7GSQ3N.list -framework Cocoa -lobjc -framework AudioToolbox -framework ExceptionHandling -Wl,-executable_path,/Users/bzbarsky/mozilla/inbound/obj-firefox/dist/bin -fcolor-diagnostics ../../../../security/libnss3.dylib

Actually, looks like this just needs to link to mozglue. I have no idea why the tree is green...

I had the same issue, but after removing a lot of old cruft I had accumulated in my mozconfig, it built fine again. Sorry, I didn't keep track of exactly what I removed. There *may* have been: --enable-dmd --enable-ffmpeg --enable-rust --enable-eme=widevine

OK, so a local opt build succeeds even without this patch. A "--enable-debug --enable-optimize" build (which is what infra does) _also_ succeeds. Which explains why the tree is green. I expect the point is we're including some of the printf stuff as inlines in a header (e.g. nsDebug.h) but not actually _using_ them. In an --enable-optimize build I bet the optimizer removes all stuff before we ever get to trying to link, so the link succeeds.

Gerald, did you perhaps remove --disable-optimize?

(In reply to Boris Zbarsky [:bz] (still a bit busy) from comment #4) > Gerald, did you perhaps remove --disable-optimize? Ah yes, that's a definite possibility. For some value of "fun", I just tried building with --disable-optimize, and I did hit the error. So it looks like your theory is correct.

Maybe we should have --disable-optimize --enable-debug builds jobs on automation.

That would be very nice, yes...

Comment on attachment 8838828 [details] [diff] [review] Link sdp_file_parser against mozglue, since it uses the PrintfTarget stuff from there Review of attachment 8838828 [details] [diff] [review]: ----------------------------------------------------------------- Sure!

Filed bug 1341404 for comment 7's suggestion.

Thank you for dealing with this.

Comment on attachment 8839667 [details] Bug 1340760: P3. Add low-latency option to FFmpeg. https://reviewboard.mozilla.org/r/114248/#review115680 ::: dom/media/platforms/ffmpeg/FFmpegVideoDecoder.h:96 (Diff revision 1) > > PtsCorrectionContext mPtsContext; > int64_t mLastInputDts; > > DurationMap mDurationMap; > + bool mLowLatency; note to self, make this const

Comment on attachment 8839665 [details] Bug 1340760: P1. Fix style and headers. https://reviewboard.mozilla.org/r/114244/#review115682

Comment on attachment 8839666 [details] Bug 1340760: P2. Add Low Latency option to CreateDecoderParams. https://reviewboard.mozilla.org/r/114246/#review115684

Comment on attachment 8839667 [details] Bug 1340760: P3. Add low-latency option to FFmpeg. https://reviewboard.mozilla.org/r/114248/#review115686

Comment on attachment 8839668 [details] Bug 1340760: P4. Never use WMF decoders when low latency is required. https://reviewboard.mozilla.org/r/114250/#review115692

My apologies for using the wrong bug number.

Pushed by bzbarsky@mozilla.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/8b5c2b030ed0 Link sdp_file_parser against mozglue, since it uses the PrintfTarget stuff from there. r=froydnj