To make use of vfp or neon I added -mfpu=vfp and -mfloat-abi=hard to my cross compilation. The Programm is a very simple hellofloat.cpp which then doesn't compile any more with the Sourcery CodeBench Lite 2013.05-24.
#include <string>
#include <iostream>
using namespace std;
int main()
{
double val=1.04;
cout << "Hello Float: " << val << endl;
}
Compile instruction:
arm-none-linux-gnueabi-g++ -o armhf-main main.cpp -march=armv7-a -mfloat-abi=hard -mfpu=neon
I'm confused since Codesorcery should support armhf compilation?
Error:
In file included from /home/user/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_GNU_Linux/bin/../arm-none-linux-gnueabi/libc/usr/include/features.h:399:0,
from /home/user/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_GNU_Linux/bin/../lib/gcc/arm-none-linux-gnueabi/4.7.3/../../../../arm-none-linux-gnueabi/include/c++/4.7.3/arm-none-linux-gnueabi/bits/os_defines.h:40,
from /home/user/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_GNU_Linux/bin/../lib/gcc/arm-none-linux-gnueabi/4.7.3/../../../../arm-none-linux-gnueabi/include/c++/4.7.3/arm-none-linux-gnueabi/bits/c++config.h:414,
from /home/user/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_GNU_Linux/bin/../lib/gcc/arm-none-linux-gnueabi/4.7.3/../../../../arm-none-linux-gnueabi/include/c++/4.7.3/string:40,
from main.cpp:1:
/home/user/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_GNU_Linux/bin/../arm-none-linux-gnueabi/libc/usr/include/gnu/stubs.h:10:29: fatal error: gnu/stubs-hard.h: No such file or directory
compilation terminated.
Compiler
arm-none-linux-gnueabi-g++ -v
Using built-in specs.
COLLECT_GCC=arm-none-linux-gnueabi-g++
COLLECT_LTO_WRAPPER=/home/user/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_GNU_Linux/bin/../libexec/gcc/arm-none-linux-gnueabi/4.7.3/lto-wrapper
Target: arm-none-linux-gnueabi
Configured with: /scratch/jbrown/2013.05-arm-linux-release/src/gcc-4.7-2013.05/configure --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=arm-none-linux-gnueabi --enable-threads --disable-libmudflap --disable-libssp --disable-libstdcxx-pch --enable-extra-sgxxlite-multilibs --with-arch=armv5te --with-gnu-as --with-gnu-ld --with-specs='%{save-temps: -fverbose-asm} %{funwind-tables|fno-unwind-tables|mabi=*|ffreestanding|nostdlib:;:-funwind-tables} -D__CS_SOURCERYGXX_MAJ__=2013 -D__CS_SOURCERYGXX_MIN__=5 -D__CS_SOURCERYGXX_REV__=24 %{O2:%{!fno-remove-local-statics: -fremove-local-statics}} %{O*:%{O|O0|O1|O2|Os:;:%{!fno-remove-local-statics: -fremove-local-statics}}}' --enable-languages=c,c++ --enable-shared --enable-lto --enable-symvers=gnu --enable-__cxa_atexit --with-pkgversion='Sourcery CodeBench Lite 2013.05-24' --with-bugurl=https://sourcery.mentor.com/GNUToolchain/ --disable-nls --prefix=/opt/codesourcery --with-sysroot=/opt/codesourcery/arm-none-linux-gnueabi/libc --with-build-sysroot=/scratch/jbrown/2013.05-arm-linux-release/install/arm-none-linux-gnueabi/libc --with-gmp=/scratch/jbrown/2013.05-arm-linux-release/obj/pkg-2013.05-24-arm-none-linux-gnueabi/arm-2013.05-24-arm-none-linux-gnueabi.extras/host-libs-i686-pc-linux-gnu/usr --with-mpfr=/scratch/jbrown/2013.05-arm-linux-release/obj/pkg-2013.05-24-arm-none-linux-gnueabi/arm-2013.05-24-arm-none-linux-gnueabi.extras/host-libs-i686-pc-linux-gnu/usr --with-mpc=/scratch/jbrown/2013.05-arm-linux-release/obj/pkg-2013.05-24-arm-none-linux-gnueabi/arm-2013.05-24-arm-none-linux-gnueabi.extras/host-libs-i686-pc-linux-gnu/usr --with-ppl=/scratch/jbrown/2013.05-arm-linux-release/obj/pkg-2013.05-24-arm-none-linux-gnueabi/arm-2013.05-24-arm-none-linux-gnueabi.extras/host-libs-i686-pc-linux-gnu/usr --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --with-cloog=/scratch/jbrown/2013.05-arm-linux-release/obj/pkg-2013.05-24-arm-none-linux-gnueabi/arm-2013.05-24-arm-none-linux-gnueabi.extras/host-libs-i686-pc-linux-gnu/usr --with-libelf=/scratch/jbrown/2013.05-arm-linux-release/obj/pkg-2013.05-24-arm-none-linux-gnueabi/arm-2013.05-24-arm-none-linux-gnueabi.extras/host-libs-i686-pc-linux-gnu/usr --disable-libgomp --disable-libitm --enable-poison-system-directories --with-build-time-tools=/scratch/jbrown/2013.05-arm-linux-release/install/arm-none-linux-gnueabi/bin --with-build-time-tools=/scratch/jbrown/2013.05-arm-linux-release/install/arm-none-linux-gnueabi/bin
Thread model: posix
gcc version 4.7.3 (Sourcery CodeBench Lite 2013.05-24)
The Sourcery CodeBench Lite toolchain does not support armhf. Nor do the Academic or Personal editions.
You'll need to purchase the Standard or Professional editions to get that.
Alternatively, I believe the cross-compiler packages for Ubuntu support the configuration you need (in fact, only that configuration).
If you're not using Ubuntu, then the pre-built Linaro toolchains should be exactly what you need. (The Ubuntu cross compiler packages are/were also built by Linaro people, albeit using the Debian/Ubuntu-specific deb build system.)