On Wed, Jun 11, 2014 at 05:43:22PM +0900, ishikawa wrote: > Hi, > > Has anyone tried to use GCC 4.9 to build mozilla code? > I got the following error during compilation and linking using GCC 4.9. 4.8 > worked without such a problem. > > The error occurs during linking of libxul.so for C-C TB. > > TB ： Excerpt from build log with GCC 4.9 > [...] > /usr/bin/ld.new: error: > /REF-OBJ-DIR/objdir-tb3/mozilla/toolkit/library/build/../../../content/media/MediaDecoderReader.o: > requires dynamic R_X86_64_PC32 reloc against > '_ZN7mozilla23AudioQueueMemoryFunctor12MallocSizeOfEPKv' which may overflow > at runtime; recompile with -fPIC > /usr/bin/ld.new: error: read-only segment has dynamic relocations > /REF-COMM-CENTRAL/comm-central/mozilla/content/media/MediaData.h:86: error: > undefined reference to 'mozilla::AudioQueueMemoryFunctor::MallocSizeOf(void > const*)' > /REF-COMM-CENTRAL/comm-central/mozilla/content/media/SharedBuffer.h:68: > error: undefined reference to > 'mozilla::AudioQueueMemoryFunctor::MallocSizeOf(void const*)' > collect2: error: ld returned 1 exit status > /REF-COMM-CENTRAL/comm-central/mozilla/config/rules.mk:882: recipe for > target 'libxul.so' failed > make[5]: *** [libxul.so] Error 1 > [...] > > Admittedly、I use GNU gold (/usr/bin/ld.new）and -gsplit-dwarf to compile > the object. > So your mileage may vary. > > But anyway, GCC 4.8 did not produce anything like this. > GCC 4.9 may be tryingto optimize the generated code by making tacit > assumption about the > relative offset that fits in 32bit value or whatever. > It is possible that the latest big libxul.so may have invalidated such > optimization to use 32-bit offset since it probably surpasses 2GB size when > it is laid out in memory at runtime. > > Anyway a head-up for the adoption of next generation of GCC. > > I will investigate more using GNU gold git snapshot from sourceware.org and > tweaking > -mmemory option to GCC 4.9 as suggested by some blogs (and -fPIC maybe?)
Sounds like namespace problems. Try replacing MallocSizeOf with mozilla::MallocSizeOf in content/media/MediaData.h and content/media/SharedBuffer.h. (And file a bug) Mike _______________________________________________ dev-builds mailing list dev-builds@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-builds
