On Thu, Apr 18, 2013 at 01:34:41AM -0400, Kirill Shklovsky wrote: > Senthil Kumar Selvaraj wrote: > > > I don't see the problem when I tried compiling the below code with 4.6.2. > > Can you paste the command line you used, with -v and -Wl,--verbose turned > > on? > > It would be helpful to know what version of binutils was used, as well as > > the build steps. > > Command used: > > /usr/local/avr/bin/avr-gcc -I. \ > -D F_CPU=20000000UL \ > -g -mmcu=atmega328 -O1 \ > -fpack-struct \ > -fshort-enums \ > -funsigned-bitfields \ > -funsigned-char \ > -Wall \ > -ffunction-sections \ > -fdata-sections \ > -fno-exceptions \ > -Wa,-ahlms=obj/main.lst.gcc \ > -Wno-uninitialized \ > -c main.cpp -o obj/main.o > > Here the result with -v -Wl,--verbose: > > COLLECT_GCC=/usr/local/avr/bin/avr-gcc > Target: avr > Configured with: ../configure --prefix=/usr/local/avr --target=avr > --enable-languages=c,c++ --disable-nls --disable-libssp --with-dwarf2 > Thread model: single > gcc version 4.7.3 (GCC) > COLLECT_GCC_OPTIONS='-I' '.' '-D' 'F_CPU=20000000UL' '-g' > '-mmcu=atmega328' '-O1' '-fpack-struct' '-fshort-enums' > '-funsigned-bitfields' '-funsigned-char' '-Wall' '-ffunction-sections' > '-fdata-sections' '-fno-exceptions' '-Wno-uninitialized' '-v' '-c' > '-o' 'obj/main.o' > /usr/local/avr/libexec/gcc/avr/4.7.3/cc1plus.exe -quiet -v -I . > -imultilib avr5 -D F_CPU=20000000UL main.cpp -quiet -dumpbase main.cpp > -mmcu=atmega328 -auxbase-strip obj/main.o -g -O1 -Wall > -Wno-uninitialized -version -fpack-struct -fshort-enums > -funsigned-bitfields -funsigned-char -ffunction-sections > -fdata-sections -fno-exceptions -fno-rtti -fno-enforce-eh-specs > -fno-exceptions -o /tmp/ccFOZ1pq.s > GNU C++ (GCC) version 4.7.3 (avr) > compiled by GNU C version 4.5.3, GMP version 4.3.2, MPFR > version 3.0.1-p4, MPC version 0.8 > GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 > ignoring nonexistent directory > "/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/include/c++/4.7.3" > ignoring nonexistent directory > "/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/include/c++/4.7.3/avr/avr5" > ignoring nonexistent directory > "/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/include/c++/4.7.3/backward" > ignoring nonexistent directory > "/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/sys-include" > #include "..." search starts here: > #include <...> search starts here: > . > /usr/local/avr/lib/gcc/avr/4.7.3/include > /usr/local/avr/lib/gcc/avr/4.7.3/include-fixed > /usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/include > End of search list. > GNU C++ (GCC) version 4.7.3 (avr) > compiled by GNU C version 4.5.3, GMP version 4.3.2, MPFR > version 3.0.1-p4, MPC version 0.8 > GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 > Compiler executable checksum: 49d98612d3bd1e77bd63ccc498787f2f > COLLECT_GCC_OPTIONS='-I' '.' '-D' 'F_CPU=20000000UL' '-g' > '-mmcu=atmega328' '-O1' '-fpack-struct' '-fshort-enums' > '-funsigned-bitfields' '-funsigned-char' '-Wall' '-ffunction-sections' > '-fdata-sections' '-fno-exceptions' '-Wno-uninitialized' '-v' '-c' > '-o' 'obj/main.o' > /usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/bin/as.exe > -mmcu=atmega328 -mno-skip-bug -ahlms=obj/main.lst.gcc -o obj/main.o > /tmp/ccFOZ1pq.s > COMPILER_PATH=/usr/local/avr/libexec/gcc/avr/4.7.3/:/usr/local/avr/libexec/gcc/avr/4.7.3/:/usr/local/avr/libexec/gcc/avr/:/usr/local/avr/lib/gcc/avr/4.7.3/:/usr/local/avr/lib/gcc/avr/:/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/bin/ > LIBRARY_PATH=/usr/local/avr/lib/gcc/avr/4.7.3/avr5/:/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/avr5/:/usr/local/avr/lib/gcc/avr/4.7.3/:/usr/local/avr/lib/gcc/avr/4.7.3/../../../../avr/lib/ > COLLECT_GCC_OPTIONS='-I' '.' '-D' 'F_CPU=20000000UL' '-g' > '-mmcu=atmega328' '-O1' '-fpack-struct' '-fshort-enums' > '-funsigned-bitfields' '-funsigned-char' '-Wall' '-ffunction-sections' > '-fdata-sections' '-fno-exceptions' '-Wno-uninitialized' '-v' '-c' > '-o' 'obj/main.o' > > The build steps is the command line above for compiling + link command: > > /usr/local/avr/bin/avr-gcc > -Wl,--gc-sections,-Map,obj/testVolatile.elf.map -mmcu=atmega328 > /usr/local/avr/avr/lib/libm.a -o obj/testVolatile.elf > obj/main.o > -lm >
Could you pass -v and -Wl,--verbose to the link command line as well and show us the output? That'll tell us if avr-gcc passed the right VMA for .data, and will also print the linker script used, so we can see if you ran into the binutils bug JW mentioned. Regards Senthil _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org https://lists.nongnu.org/mailman/listinfo/avr-gcc-list
