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AVAILABLE CONFIGURATIONS
^^^^^^^^^^^^^^^^^^^^^^^^
arm-defconfig
Builds an ARM toolchain using gcc 3.4.5
arm7tdmi-defconfig-4.2.4
arm920t-defconfig-4.2.4
arm926t-defconfig-4.2.4
Builds an ARM toolchain using gcc 4.2.4. This configuration
builds both gcc and g++. There are thred versions: one for
arm7tdmi (armv4t) , arm920t (armv4t) and arm926t (arv5t) because
of differences in the way that soft floating is handled in between
the armv4t and arm5t architectures.
NOTE: At present, there are issues with some of the binutils
programs (arm-elf-objcopy in particular) that cause Floating
point exceptions when trying to build NuttX on certain platforms,
specifically, those that execute from FLASH and use arm-elf-objcopy
to relocate the .data section into flash. This bug is probably
due to improperly positioned sections and can probably fixed
by changing the architecture's ld.script file.
cortexm3-defconfig-4.3.3
Builds an ARM toolchain for the Cortex-M3 using gcc 4.3.3.
This configuration builds both gcc and g++.
NOTE: This configuration is untested as of this writing.
bfin-defconfig-4.2.4
Builds an Blackfin toolchain using gcc 4.2.4
h8300_config
Builds an H8/300 toolchain using gcc 3.4.5
m68hc11-config
Builds an hc11 toolchain using gcc 3.4.5
m68k-config
Builds an M68K toolchain using gcc 3.4.5
sh-defconfig
Builds an SH-1/2 toolchain using gcc 3.4.5
GENERAL BUILD STEPS
^^^^^^^^^^^^^^^^^^^
1. CD to the correct directory.
Change to the directory just above the NuttX installation. If <nuttx-dir> is
where NuttX is installed, then cd to <nuttx-dir>/..
2. Get and Install the buildroot Module
a. Using a release tarball:
cd <nuttx-dir>/..
Download the appropriate buildroot package.
unpack the buildroot package
rename the directory to buildroot
b. Using CVS
Check out the misc/buildroot module. CVS checkout instructions:
cvs -d:pserver:anonymous@nuttx.cvs.sourceforge.net:/cvsroot/nuttx login
cvs -z3 -d:pserver:anonymous@nuttx.cvs.sourceforge.net:/cvsroot/nuttx co -P misc/buildroot
Move the buildroot Source Tree and create the archive directory
mv misc/buildroot .
Make the archive directory:
mkdir archive
The <nuttx-dir>/../buildroot is where the toolchain is built;
The <nuttx-dir>/../archive directory is where toolchain sources will be downloaded.
3. Make sure that NuttX is configured
cd <nuttx-dir>/tools
./configure.sh <nuttx-configuration>
4. Configure and Make the buildroot
cd buildroot
cp configs/<config-file> .config
make oldconfig
make
This will download the large source packages for the toolchain and build the toolchain.
The resulting binaries will be under buildroot/build_<arch>. There will also be a
large build directory called something like toolchain_build_<arch>; this directory
can be removed once the build completes successfully.
Where <config-file> is one of the configuration files listed above and <arch> is an
archtecture name. Examples: build_m32c, build_arm_nofpu, etc.
Cygwin GCC BUILD NOTES
^^^^^^^^^^^^^^^^^^^^^^
On Cygwin, the buildroot 'make' command will fail with an error like:
"...
build/genchecksum cc1-dummy > cc1-checksum.c
opening cc1-dummy: No such file or directory
..."
This is caused because on Cygwin, host executables will be generated with the extension .exe
and, apparently, the make variable "exeext" is set incorrectly. A work around after the
above occurs is:
cd toolchain_build_<arch>/gcc-4.2.4-build/gcc # Go to the directory where error occurred
mv cc1-dummy.exe cc1-dummy # Rename the executable without .exe
rm cc1-checksum.c # Get rid of the bad generated file
Then resume the buildroot make:
cd - # Back to the buildroot make directory
make # Restart the build
If you build g++, you will see another similar error:
...
build/genchecksum cc1plus-dummy > cc1plus-checksum.c
opening cc1plus-dummy: No such file or directory
...
The fix is similar:
cd toolchain_build_<arch>/gcc-4.2.4-build/gcc # Go to the directory where error occurred
mv cc1plus-dummy.exe cc1plus-dummy # Rename the executable without .exe
rm cc1plus-checksum.c # Get rid of the bad generated file
Then resume the buildroot make:
cd - # Back to the buildroot make directory
make # Restart the build
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