8.5.2014 20:10, Christoph K. kirjoitti:
Hi,
I still have the same problem, can anyone help, please?!
I want to compile gcc 4.9.0 as a cross compiler for the msp430 architecture.
About the prerequisites
-----------------------
Binutils 2.24 sources have been downloaded, a symbolic link
"binutils" has been created in the gcc source dir.
Normally binutils will be built separately, not in the same time with
GCC, during the
"bootstrap" (first time ever) build for the toolchain. And be updated
separately, be
used with many GCC versions for the same target etc.
Then ...
cd /usr/local/src/gcc-4.9.0
./contrib/download_prerequisites
This was made for building native GCCs and forgets which extra
prerequisite a cross
GCC has :(
mkdir /usr/local/src/gcc-4.9.0-build-msp430-elf
cd /usr/local/src/gcc-4.9.0-build-msp430-elf
../gcc-4.9.0/configure --target=msp430-elf \
--prefix=/usr/local/msp430-elf --enable-languages=c,c++
The extra prerequisite for a cross GCC of course is having the target C
library preinstalled!
A native target system has it in '/lib', '/usr/include' and '/usr/lib'
in an old Linux/32-bit
case. The exception is an embedded target which uses 'newlib' as its C
library and usually
has only the newlib sources during the "bootstrap" phase. Later one of
course has the
earlier built newlib binaries and headers for the target. So when
bootstraping one needs
to tell that newlib will be used as the target C library via
'--with-newlib' in the GCC configure.
The error
---------
make of gcc fails with the following error:
...
checking for msp430-elf-gcc... \
/usr/local/src/gcc-4.9.0-build-msp430-elf/./gcc/xgcc \
-B/usr/local/src/gcc-4.9.0-build-msp430-elf/./gcc/ \
-B/msp430-elf/bin/ -B/msp430-elf/lib/ \
-isystem /msp430-elf/include -isystem /msp430-elf/sys-include
checking for suffix of object files... configure: error: \
in `/usr/local/src/gcc-4.9.0-build-msp430-elf/msp430-elf/libgcc':
configure: error: cannot compute suffix of object files: cannot compile
See `config.log' for more details.
make[1]: *** [configure-target-libgcc] Fehler 1
make[1]: Leaving directory `/usr/local/src/gcc-4.9.0-build-msp430-elf'
make: *** [all] Fehler 2
Probably building libgcc needs some headers from the target C library
headers. If it was
told being newlib, then the configury system would have known where they
are : In the provided
newlib sources, 'newlib' and 'libgloss' subdirs from them being
symlinked into the GCC
sources...
So please try the normal build phases for a newlib-based (assuming
'msp430-elf' uses it)
cross GCC :
1. configure, build and install GNU binutils for the target
2. symlink the 'newlib' and 'libgloss' subdirs from the newlib-x.y.z
sources into the main
GCC source directory just like the 'gmp', 'mpfr' and 'mpc' sources...
3. configure, build and install GCC for the target, use '--with-newlib'
in configure. And use
exactly the same '--prefix=$prefix' and '--target=$target' switches
as with the binutils
configure!
