gdbserver - manually modify Makefile

[Pedro Alves]

On 08/13/2015 09:50 PM, Ran Shalit wrote:
> Hello,
> 
> I've  cross compile  gdbserver according to wiki in:
> https://sourceware.org/gdb/wiki/BuildingCrossGDBandGDBserver
> ubuntu@ubuntu-laptop:~/gdb-7.9.1/gdb/gdbserver$ sudo ./configure
> --host=powerpc-buildroot-linux-gnu --disable-werror

You should not need sudo, nor --disable-werror.

> 
> But on doing :
> make
> I've noticed that it uses the host gcc instead of the cross-compiler gcc.
> Only after manually modifying the Makefie with
> CC = powerpc-buildroot-linux-gnu-gcc
> instead of
> CC = gcc
> It was cross compiling as expected.
> 

Open the config.log file in the build directory, and look for something
that looks like this:

configure:2558: checking for powerpc-buildroot-linux-gnu-gcc

The following lines should look something like this:

configure:2574: found /path/to/whatever/bin/powerpc-buildroot-linux-gnu-gcc
configure:2585: result: powerpc-buildroot-linux-gnu-gcc
configure:2854: checking for C compiler version
configure:2863: powerpc-buildroot-linux-gnu-gcc --version >&5

But in your case, "result" is probably "gcc".  If configure doesn't
find $host-gcc, then it'll default to "gcc".  Most likely, you don't
have powerpc-buildroot-linux-gnu-gcc in the PATH.  Make sure
it is in the PATH, and that you can execute it (e.g., try
$ powerpc-buildroot-linux-gnu-gcc -v), and start over.

Let me know how it went.

Thanks,
Pedro Alves