[yocto] Cannot run simple binary executable file

[Denys Dmytriyenko]

On Fri, Oct 10, 2014 at 04:15:42PM -0700, Wy kevinthesun wrote:
> I tried both hard and hardfp. They both returned 3 errors:
> 
> C compiler cannot create executables    Hello        -1    Configure Problem
> in `/home/kevinthefire/workspace/Hello':    Hello        -1    Configure
> Problem
> make: *** No rule to make target `all'.    Hello             C/C++ Problem

That doesn't sound like a toolchain error, but rather an autotools one. Make 
sure you are setting up cross compilation properly.


> 2014-10-09 23:12 GMT-07:00 Nicolas Dechesne <nicolas.dechesne at linaro.org>:
> 
> > On Thu, Oct 9, 2014 at 10:27 PM, Wy kevinthesun <kevinthesunwy at gmail.com>
> > wrote:
> > > It seems that Yocto 1.5.1 is built with hard float. However, the 1.51,
> > 1.6
> > > and  1.62 toolchains are soft float. When I tried to set
> > > "-mfloat-abi=hardfp" in the compile option, the compiling process ran
> > into
> > > error. It seems these toolchains don't  support hard float? How can I
> > solve
> > > this problem?
> > >
> > > These are my set in the environment file of 1.5.1 toolchain:
> > > export CC="arm-poky-linux-gnueabi-gcc  -march=armv5te -marm
> > > -mthumb-interwork -mfloat-abi=hardfp
> > > --sysroot=/opt/poky/1.5.1/sysroots/armv5te-poky-linux-gnueabi"
> > > export CXX="arm-poky-linux-gnueabi-g++  -march=armv5te -marm
> > > -mthumb-interwork -mfloat-abi=hardfp
> > > --sysroot=/opt/poky/1.5.1/sysroots/armv5te-poky-linux-gnueabi"
> > > export CPP="arm-poky-linux-gnueabi-gcc -E  -march=armv5te -marm
> > > -mthumb-interwork -mfloat-abi=hardfp
> > > --sysroot=/opt/poky/1.5.1/sysroots/armv5te-poky-linux-gnueabi"
> > >
> > > It ran into error.
> >
> >
> > maybe because the gcc documentation says -mfloat-abi=hard, not =hardfp ?
> >
> > in general, showing us the error you have is much preferred, otherwise
> > it's difficult to help if we don't really know what went wrong.
> >
> > cheers.
> >