Hi Gang, Please only use the GCC for Blackfin 2013R1 or 2014R1 from https://sourceforge.net/projects/adi-buildroot/files/ . Upstream GCC5 isn't ported to Blackfin properly.
Regards, Sonic >-----Original Message----- >From: Chen Gang [mailto:xili_gchen_5...@hotmail.com] >Sent: Thursday, April 16, 2015 11:22 PM >To: real...@gmail.com; Richard Weinberger >Cc: adi-buildroot-de...@lists.sourceforge.net; linux-kernel@vger.kernel.org >Subject: [Adi-buildroot-devel] [Consult] blackfin: About one building break >issue for STACKTRACE > >Hello Maintainers: > >I want to consult one building issue about blackfin, the related issue >is: > > CC arch/blackfin/kernel/stacktrace.o > arch/blackfin/kernel/stacktrace.c: In function 'save_stack_trace': > arch/blackfin/kernel/stacktrace.c:23:6: error: frame pointer required, but > reserved > void save_stack_trace(struct stack_trace *trace) > ^ > arch/blackfin/kernel/stacktrace.c:13:24: note: for 'current_frame_pointer' > register unsigned long current_frame_pointer asm("FP"); > ^ > >For me: > > - Originally, I treated it as gcc's issue, but after think of, for me, > gcc is OK: > > "-fomit-frame-pointer" is needed by extern "FP" pointer. > > "-fomit-frame-pointer" is against "-pg" (they can not be together). > > - For kernel: > > STACKTRACE needs "-fomit-frame-pointer", and FUNCTION_TRACER will > enable "-pg", > > FUNCTION_TRACER and STACKTRACE are related. > > The related commit: "1c873be Blackfin: initial support for ftrace" > (the commit time point is Jun 9 2009). > > - After this related commit, it never can pass building by upstream > blackfin gcc5: > > make defconfig && make menuconfig > > enable FUNCTION_TRACER (which also enable STACKTRACE) > > make (which will cause building break) > >So I want to consult: > > - Is it OK to use upstream gcc5 for blackfin? (or which gcc version is > suitable for building blackfin Linux kernel?) > > - Did the original commit pass building ? (e.g. by one of old gcc > version). > > - How to fix this issue, next? > > >Welcome any members ideas, suggestions and completions. > >Thanks. >-- >Chen Gang > >Open, share, and attitude like air, water, and life which God blessed > >------------------------------------------------------------------------------ >BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own >process in accordance with the BPMN >2 standard Learn Process modeling best practices with Bonita BPM through live >exercises >http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ >source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF >_______________________________________________ >Adi-buildroot-devel mailing list >adi-buildroot-de...@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/adi-buildroot-devel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/