jrussell88
DD-WRT User
Joined: 01 May 2009
Posts: 64
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 Posted: Sat Oct 29, 2016 21:00 Post subject: Problems compiling hello world for Arm |
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Can anyone suggest what the problem is - my hello world program fails to compile; here's what I did.
| Code: | $ arm-openwrt-linux-muslgnueabi-gcc hello.c -DNEED_PRINTF -o hello
Assembler messages:
Fatal error: invalid -march= option: `armv7-a'
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I'm running Ubuntu 15.10 x64, and compiling for a Linksys EA8500: | Code: | # cat /proc/version
Linux version 3.18.26 (root@seg-desktop) (gcc version 5.2.0 (OpenWrt GCC 5.2.0 r47665) ) #59 SMP PREEMPT Mon Feb 1 01:26:29 CET 2016 |
I installed the GNU C compiler for armhf architecture: gcc-arm-linux-gnueabihf and downloaded and unpacked the dd-wrt toolchains: ftp://ftp.dd-wrt.com/toolchains/
The Linksys EA8500 has an Arm 7a Neon processor so the relevant toolchain is:
/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi
Add the path for the cross-compiler executable to the path environment variable: | Code: | | PATH=~/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin:$PATH |
Turn on executable bits (chmod a+x or Nautilus) for:
/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin/arm-linux-uclibc-gcc
/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/lib/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/cc1
/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/lib/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/cc1plus
/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/lib/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/collect2
hello.c:
| Code: | #include <stdio.h>
int main(int argc, char **argv)
{ printf("hello %d\n", argc); } |
Compile hello.c, enabling printf output:
| Code: | | arm-linux-uclibc-gcc hello.c -DNEED_PRINTF -o hello |
Verbose output:
| Quote: | $ arm-linux-uclibc-gcc hello.c -v -DNEED_PRINTF -o hello
Using built-in specs.
COLLECT_GCC=arm-linux-uclibc-gcc
Target: arm-openwrt-linux-muslgnueabi
Configured with: /home/xfs/openwrt/trunk2/trunk/build_dir/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/gcc-linaro-4.8-2014.04/configure --with-bugurl=https://dev.openwrt.org/ --with-pkgversion='OpenWrt/Linaro GCC 4.8-2014.04 r41062' --prefix=/home/xfs/openwrt/trunk2/trunk/staging_dir/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi --build=x86_64-suse-linux --host=x86_64-suse-linux --target=arm-openwrt-linux-muslgnueabi --with-gnu-ld --enable-target-optspace --disable-libgomp --disable-libmudflap --disable-multilib --disable-nls --with-host-libstdcxx=-lstdc++ --with-gmp=/home/xfs/openwrt/trunk2/trunk/staging_dir/host --with-mpfr=/home/xfs/openwrt/trunk2/trunk/staging_dir/host --disable-decimal-float --with-mpc=/home/xfs/openwrt/trunk2/trunk/staging_dir/host --disable-libssp --enable-__cxa_atexit --with-arch=armv7-a --with-headers=/home/xfs/openwrt/trunk2/trunk/staging_dir/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/include --enable-languages=c,c++ --enable-shared --enable-threads --with-slibdir=/home/xfs/openwrt/trunk2/trunk/staging_dir/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/lib
Thread model: posix
gcc version 4.8.3 (OpenWrt/Linaro GCC 4.8-2014.04 r41062)
COLLECT_GCC_OPTIONS='-v' '-D' 'NEED_PRINTF' '-o' 'hello' '-march=armv7-a' '-mtls-dialect=gnu'
/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin/../lib/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/cc1 -quiet -v -iprefix /..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin/../lib64/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/ -D NEED_PRINTF hello.c -quiet -dumpbase hello.c -march=armv7-a -mtls-dialect=gnu -auxbase hello -version -o /tmp/ccnrh6IF.s
GNU C (OpenWrt/Linaro GCC 4.8-2014.04 r41062) version 4.8.3 (arm-openwrt-linux-muslgnueabi)
compiled by GNU C version 4.7.2 20130108 [gcc-4_7-branch revision 195012], GMP version 5.1.3, MPFR version 3.1.2, MPC version 1.0.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring duplicate directory "/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin/../lib64/gcc/../../lib64/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/include"
ignoring duplicate directory "/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin/../lib64/gcc/../../lib64/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/include-fixed"
ignoring duplicate directory "/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin/../lib64/gcc/../../lib64/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/../../../../arm-openwrt-linux-muslgnueabi/sys-include"
ignoring duplicate directory "/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin/../lib64/gcc/../../lib64/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/../../../../arm-openwrt-linux-muslgnueabi/include"
#include "..." search starts here:
#include <...> search starts here:
/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin/../lib64/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/include
/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin/../lib64/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/include-fixed
/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin/../lib64/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/../../../../arm-openwrt-linux-muslgnueabi/sys-include
/..../toolchains/toolchain-arm_cortex-a9+neon_gcc-4.8-linaro_musl-1.1.2_eabi/bin/../lib64/gcc/arm-openwrt-linux-muslgnueabi/4.8.3/../../../../arm-openwrt-linux-muslgnueabi/include
End of search list.
GNU C (OpenWrt/Linaro GCC 4.8-2014.04 r41062) version 4.8.3 (arm-openwrt-linux-muslgnueabi)
compiled by GNU C version 4.7.2 20130108 [gcc-4_7-branch revision 195012], GMP version 5.1.3, MPFR version 3.1.2, MPC version 1.0.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 78b3c37e1aa30b6fbf8650f043dd3b51
COLLECT_GCC_OPTIONS='-v' '-D' 'NEED_PRINTF' '-o' 'hello' '-march=armv7-a' '-mtls-dialect=gnu'
as -v -march=armv7-a -meabi=5 -o /tmp/cc3xlkex.o /tmp/ccnrh6IF.s
GNU assembler version 2.25.1 (x86_64-linux-gnu) using BFD version (GNU Binutils for Ubuntu) 2.25.1
Assembler messages:
Fatal error: invalid -march= option: `armv7-a'
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Have I missed something? Thanks! |
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