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2006-12-11äç 11:19 +0100ïDimitry Andric wroteï > YanXT Gpsign wrote: > > Now I wonder if I can achieve it by compiling with a compatible-configured toolchain, > > at least vfp-softfp format-compatible toolchain...like crosstool-0.42 . Is this possible? > > It could be possible, but subtle differences between your toolchain and > MontaVista's might give other problems that are very hard to solve. It > is simply much better to compile everything using the same toolchain. > > That said, you need to make sure that your toolchain uses the same > floating point options as MontaVista's. To see what MontaVista uses, > extract one of the .o files from libGPSEngine.a, e.g.: > > arm-9tdmi-linux-gnu-ar x libGPSEngine.a AGPS.o > > and then run objdump -p on it, to see what float options it uses: > > arm-9tdmi-linux-gnu-objdump -p AGPS.o > > You should get something like (but probably a little different): > > AGPS.o: file format elf32-littlearm > private flags = 600: [APCS-32] [VFP float format] [software FP] you were right, the command I put for testing: [YanXT@R51:~/sirfapi061030](0)$ arm-9tdmi-linux-gnu-objdump -p AGPS.o AGPS.o: file format elf32-littlearm private flags = 600: [APCS-32] [VFP float format] [software FP] just like what u said. :) and I tested one lib under crosstool dir, the result was as follows: [YanXT@R51:/opt/crosstool/gcc-3.4.1-glibc-2.3.3/arm-9tdmi-linux-gnu/arm-9tdmi-linux-gnu/lib](0)$ arm-9tdmi-linux-gnu-objdump -p libm.so|grep private private flags = 202: [APCS-32] [FPA float format] [software FP] [has entry point] Ah, so , obviously, their software FP format don't match, beside compiling libGPSEngine with my rebuilt toochain which supports FPA, How can I build crosstool to have VFP softwaredefault float format support? thanks~ YanXT -- For unsubscribe information see http://sourceware.org/lists.html#faq
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