Hi, I hope I ask on the right place, otherwise a redirection is appreciated. I even have to put two more excuses at the begin: first, I'm not a Debian or Ubuntu user and not familiar with the dpkg and apt-get details; second, I also don't have much knowledge about ARM-linux. But I'm learning.
I installed 6.0.1 (according to /etc/debian_version) on an ARM board with v5TE architecture which is not able to execute armv7 code. Precompiled binaries are v4T. Now I tried to install gcc toolchain to build my application. On a "squeeze/sid" (according to /etc/debian_version) intel machine I used synaptic to install packages with "arm", "gnueabi" and "armel" based on guessing inspired by reading http://wiki.debian.org/ArmEabiPort. That documentation for me unfortunately is insufficient. I tried to compile with "arm-linux-gnueabi-gcc-4.4 -march=armv4t", but I do not get "Tag_CPU_arch: v4T" (readelf -A) but "Tag_CPU_arch: v7". It seems that the tool chain was built incorrectly and specific to armv7; I don't find the multi-libs -- there seems to be only one single set of libs (libgcc.a etc)! I had expected one set for each combination of compiler flags (hardfloat/softfloat, arm/thumb, ....), so heaps of libs. I need something in between v4T, thumb, soft-float to maybe v5T, armmode, soft-float, interwork. I considered to rebuilt the packages (gcc-4.4-arm-linux-gnueabi_4.4.5-15ubuntu1_i386.deb, others) but I have no clue how to do so. The build system seems to be sophisticated. I found some "--with-arch=armv7-a" or alike in some "rules" files, but I have no clue what to change and in which way to get a correct ARM-linux-EABI toolchain supporting v4T. I read that v4T is supposed to be the minimal CPU requirement, but I don't get it working. Do I need to install extra packages? Or do I need to rebuild the toolchain? Isn't it a bug that v4T is not supported anymore? In ChangeLog I read: -- Matthias Klose <[email protected]> Wed, 04 Nov 2009 16:04:17 +0100 gcc-4.4 (4.4.2-1ubuntu1) lucid; urgency=low * Build --with-arch=armv7-a --with-fpu=vfpv3-d16 on armel. Is this related? How do I workaround? I would like to read more about Debian-ARM-Linux, but what google finds seems to be very limited. For example, I was unable to find instructions how to bootstrap a compiler, how to build a distribution using specific compiler flags or anything. Any pointers appreciated. Any help or pointers appreciated! oki, Steffen tech info: $ arm-linux-gnueabi-gcc-4.4 -mcpu=arm9tdmi -march=armv4t -msoft-float -mfloat-abi=soft -mthumb-interwork -v -O0 -Wall -o hello-arm hello.c Using built-in specs. Target: arm-linux-gnueabi Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.4.5-15ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.4 --enable-shared --enable-multiarch --with-multiarch-defaults=i386-linux-gnu --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/arm-linux-gnueabi/include/c++/4.4.5 --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --disable-sjlj-exceptions --with-arch=armv7-a --with-float=softfp --with-fpu=vfpv3-d16 --with-mode=thumb --disable-werror --enable-checking=release --program-prefix=arm-linux-gnueabi- --includedir=/usr/arm-linux-gnueabi/include --build=i686-linux-gnu --host=i686-linux-gnu --target=arm-linux-gnueabi --with-headers=/usr/arm-linux-gnueabi/include --with-libs=/usr/arm-linux-gnueabi/lib Thread model: posix gcc version 4.4.5 (Ubuntu/Linaro 4.4.5-15ubuntu1) COLLECT_GCC_OPTIONS='-mcpu=arm9tdmi' '-march=armv4t' '-msoft-float' '-mfloat-abi=soft' '-mthumb-interwork' '-v' '-O0' '-Wall' '-o' 'hello-arm' '-mfpu=vfpv3-d16' '-mthumb' /usr/lib/gcc/arm-linux-gnueabi/4.4.5/cc1 -quiet -v hello.c -quiet -dumpbase hello.c -mcpu=arm9tdmi -march=armv4t -msoft-float -mfloat-abi=soft -mthumb-interwork -mfpu=vfpv3-d16 -mthumb -auxbase hello -O0 -Wall -version -o /tmp/ccYlVa85.s ignoring duplicate directory "/usr/lib/gcc/arm-linux-gnueabi/4.4.5/../../../../arm-linux-gnueabi/include" #include "..." search starts here: #include <...> search starts here: /usr/lib/gcc/arm-linux-gnueabi/4.4.5/include /usr/lib/gcc/arm-linux-gnueabi/4.4.5/include-fixed /usr/arm-linux-gnueabi/include End of search list. GNU C (Ubuntu/Linaro 4.4.5-15ubuntu1) version 4.4.5 (arm-linux-gnueabi) compiled by GNU C version 4.5.2, GMP version 4.3.2, MPFR version 3.0.0-p8. GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 42a829754c2f3234f27c5e633e6060a3 COLLECT_GCC_OPTIONS='-mcpu=arm9tdmi' '-march=armv4t' '-msoft-float' '-mfloat-abi=soft' '-mthumb-interwork' '-v' '-O0' '-Wall' '-o' 'hello-arm' '-mfpu=vfpv3-d16' '-mthumb' /usr/lib/gcc/arm-linux-gnueabi/4.4.5/../../../../arm-linux-gnueabi/bin/as -mcpu=arm9tdmi -march=armv4t -mthumb-interwork -mfloat-abi=soft -mfloat-abi=soft -mfpu=vfpv3-d16 -mimplicit-it=thumb -meabi=5 -o /tmp/ccnGKguj.o /tmp/ccYlVa85.s COMPILER_PATH=/usr/lib/gcc/arm-linux-gnueabi/4.4.5/:/usr/lib/gcc/arm-linux-gnueabi/4.4.5/:/usr/lib/gcc/arm-linux-gnueabi/:/usr/lib/gcc/arm-linux-gnueabi/4.4.5/:/usr/lib/gcc/arm-linux-gnueabi/:/usr/lib/gcc/arm-linux-gnueabi/4.4.5/../../../../arm-linux-gnueabi/bin/ LIBRARY_PATH=/usr/lib/gcc/arm-linux-gnueabi/4.4.5/:/usr/lib/gcc/arm-linux-gnueabi/4.4.5/../../../../arm-linux-gnueabi/lib/:/usr/lib/i386-linux-gnu/ COLLECT_GCC_OPTIONS='-mcpu=arm9tdmi' '-march=armv4t' '-msoft-float' '-mfloat-abi=soft' '-mthumb-interwork' '-v' '-O0' '-Wall' '-o' 'hello-arm' '-mfpu=vfpv3-d16' '-mthumb' /usr/lib/gcc/arm-linux-gnueabi/4.4.5/collect2 --build-id --eh-frame-hdr -dynamic-linker /lib/ld-linux.so.3 -X --hash-style=gnu -m armelf_linux_eabi -o hello-arm /usr/lib/gcc/arm-linux-gnueabi/4.4.5/../../../../arm-linux-gnueabi/lib/crt1.o /usr/lib/gcc/arm-linux-gnueabi/4.4.5/../../../../arm-linux-gnueabi/lib/crti.o /usr/lib/gcc/arm-linux-gnueabi/4.4.5/crtbegin.o -L/usr/lib/gcc/arm-linux-gnueabi/4.4.5 -L/usr/lib/gcc/arm-linux-gnueabi/4.4.5/../../../../arm-linux-gnueabi/lib -L/usr/lib/i386-linux-gnu /tmp/ccnGKguj.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc/arm-linux-gnueabi/4.4.5/crtend.o /usr/lib/gcc/arm-linux-gnueabi/4.4.5/../../../../arm-linux-gnueabi/lib/crtn.o $ readelf -A hello-arm Attribute Section: aeabi File Attributes Tag_CPU_name: "7-A" Tag_CPU_arch: v7 Tag_CPU_arch_profile: Application Tag_ARM_ISA_use: Yes Tag_THUMB_ISA_use: Thumb-2 Tag_FP_arch: VFPv3-D16 Tag_ABI_PCS_wchar_t: 4 Tag_ABI_FP_denormal: Needed Tag_ABI_FP_exceptions: Needed Tag_ABI_FP_number_model: IEEE 754 Tag_ABI_align_needed: 8-byte Tag_ABI_align_preserved: 8-byte, except leaf SP Tag_ABI_enum_size: int Tag_ABI_HardFP_use: SP and DP Tag_DIV_use: Not allowed $ readelf -A /usr/arm-linux-gnueabi/lib/libc.so.6 Attribute Section: aeabi File Attributes Tag_CPU_name: "7-A" Tag_CPU_arch: v7 ... $ readelf -A /usr/lib/gcc/arm-linux-gnueabi/4.4.5/libgcc.a ... File: /usr/lib/gcc/arm-linux-gnueabi/4.4.5/libgcc.a(*.o) Attribute Section: aeabi File Attributes Tag_CPU_name: "7-A" Tag_CPU_arch: v7 ... >From a working binary: Attribute Section: aeabi File Attributes Tag_CPU_name: "ARM9TDMI" Tag_CPU_arch: v4T Tag_ARM_ISA_use: Yes Tag_THUMB_ISA_use: Thumb-1 Tag_ABI_PCS_wchar_t: 4 Tag_ABI_FP_denormal: Needed Tag_ABI_FP_exceptions: Needed Tag_ABI_FP_number_model: IEEE 754 Tag_ABI_align_needed: 8-byte Tag_ABI_enum_size: int which is what I expect to build, too. -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/CAOBoUnMUXkzU2fLd8Xv5bt12jur3s7ABfNNpf=o7bc775+q...@mail.gmail.com
