GCC Cross-Compiler Installation

codeblaster · **Joined:** Fri Apr 24, 2015 1:25 pm **Posts:** 14

Hi,
I recently started learning about operating system. When I got to learn about the basics, I reached here on http://wiki.osdev.org/GCC_Cross-Compiler
Now I am stuck at GCC Cross-Compiler Installation.

I downloaded these packages
1)binutils-2.25.tar.gz
2)cloog-parma-0.16.1.tar.gz
3)gcc-4.9.2.tar.gz
4) gmp-6.0.0a.tar.lz
5)isl-0.12.2.tar.gz
6)mpc-1.0.3.tar.gz
7)mpfr-3.1.2.tar.gz

and I followed these instruction on by Ubuntu 14.04 with pre installed gcc version 4.8.2

Preparation

Code:

 export PREFIX="$HOME/opt/cross"
export TARGET=i686-elf
export PATH="$PREFIX/bin:$PATH"

binutils

Code:

# If you wish to build these packages as part of binutils:
mv isl-x.y.z binutils-x.y.z/isl
mv cloog-x.y.z binutils-x.y.z/cloog
# But reconsider: You should just get the development packages from your OS.

Code:

mkdir build-binutils
cd build-binutils
../binutils-x.y.z/configure --target=$TARGET --prefix="$PREFIX" --with-sysroot --disable-nls --disable-werror
make
make install

GCC

Code:

cd $HOME/src
# If you wish to build these packages as part of gcc:
mv libiconv-x.y.z gcc-x.y.z/libiconv # Mac OS X users
mv gmp-x.y.z gcc-x.y.z/gmp
mv mpfr-x.y.z gcc-x.y.z/mpfr
mv mpc-x.y.z gcc-x.y.z/mpc
mv isl-x.y.z gcc-x.y.z/isl
mv cloog-x.y.z gcc-x.y.z/cloog
# But reconsider: You should just get the development packages from your OS.
mkdir build-gcc
cd build-gcc
../gcc-x.y.z/configure --target=$TARGET --prefix="$PREFIX" --disable-nls --enable-languages=c,c++ --without-headers
make all-gcc
make all-target-libgcc

then error appears:

Code:

checking for suffix of object files... configure: error: in `/home/coder/src/build-gcc/i686-elf/libgcc':
configure: error: cannot compute suffix of object files: cannot compile
See `config.log' for more details.
make: *** [configure-target-libgcc] Error 1

because of these further steps are failing.

How shall I proceed?

I have attached the config.log file.

cmdrcoriander · **Joined:** Tue Jan 20, 2015 8:33 pm **Posts:** 29

This can be caused by messing up your GMP/MPFR/MPC installation, I had this problem for a few hours just last weekend

Try:

1. Delete your build-binutils and build-gcc directories - I found that once I hit this point, 'make clean distclean' could no longer fix it.
2. Remake your build-binutils and build-gcc directories.
3. Change directory to the gcc directory (NOT the build-gcc directory).
4. Run ./contrib/download_prerequisites (this will get the correct versions of GMP, MPFR and MPC downloaded into your gcc tree, instead of using your system libraries)
5. Change directory to build-binutils
6. Now you should be able to follow the tutorial as written, except for the part where you put the GMP/MPFR/MPC/ISL/CLOOG libraries in the GCC directory.

I don't know why the tutorial suggests downloading the supporting libraries separately and copying them into the gcc directory, but that never worked for me (and cost me a few hours) - the ./contrib/download_prerequisites script handles doing that for you, with the correct versions guaranteed.

e: looking at your config.log file I can see you're having the literal exact same problem as I was (as: exec: -o: not found) - hopefully this saves you the three or four hours of pain I went through

codeblaster · **Joined:** Fri Apr 24, 2015 1:25 pm **Posts:** 14

Still the same error throws.
Which version of gcc and binutils did you download?

cmdrcoriander · **Joined:** Tue Jan 20, 2015 8:33 pm **Posts:** 29

I have both a 32-bit and 64-bit cross compiler running with binutils 2.24 and gcc 4.9.2.

Are you sure your binutils has been built properly? Try running

Code:

$PREFIX/bin/i686-elf-as --version

codeblaster · **Joined:** Fri Apr 24, 2015 1:25 pm **Posts:** 14

I hadn't installed textinfo. Now everything works fine

ty for ur help

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GCC Cross-Compiler Installation

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