forked from Imagelibrary/rtems
2003-01-31 Ralf Corsepius <corsepiu@faw.uni-ulm.de>
* README.cdn-X: New. * binutils/binutils.add: Add --build=%_build --host=%_host. * cpukit/.cvsignore: Add *.spec.in. * gcc3newlib/gccnewlib.add: Add --build=%_build --host=%_host. * gdb/gdb.add: Add --build=%_build --host=%_host. * rtemsdoc/.cvsignore: Add *.spec.in.
This commit is contained in:
Ralf Corsepius
@@ -1,3 +1,12 @@
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2003-01-31 Ralf Corsepius <corsepiu@faw.uni-ulm.de>
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* README.cdn-X: New.
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* binutils/binutils.add: Add --build=%_build --host=%_host.
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* cpukit/.cvsignore: Add *.spec.in.
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* gcc3newlib/gccnewlib.add: Add --build=%_build --host=%_host.
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* gdb/gdb.add: Add --build=%_build --host=%_host.
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* rtemsdoc/.cvsignore: Add *.spec.in.
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2003-01-31 Ralf Corsepius <corsepiu@faw.uni-ulm.de>
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* gcc3newlib/gccnewlib.add: Remove Buildroot.
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122
scripts/README.cdn-X
Normal file
122
scripts/README.cdn-X
Normal file
@@ -0,0 +1,122 @@
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Applying RTEMS-toolchain RPM-specs for Canadian Cross Compilation
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=================================================================
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Example: Building a Cygwin-based xxx-rtems toolchain under Linux:
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Quickstart
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----------
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The command to invoke rpm for building RTEMS's gnu toolchain cdn. cross
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under Linux is:
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rpmbuild -ba xxx-rtems-yyy.spec \
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--define='_build i686-pc-linux-gnu'
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--define='_host i386-cygwin' \
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--target=i386-cygwin
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[If using rpm < 4.1, use "rpm" instead of "rpmbuild".]
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If you don't understand this, read on ... :-)
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1. Prerequisites
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----------------
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* a native Linux-toolchain (eg. gcc, binutils).
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Prebuild binaries should come with any Linux distribution.
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We further on assume this toolchain to be installed in /usr, such that
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/usr/bin/gcc is supposed to be your native CC.
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* a Linux -> Cygwin cross-toolchain
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RPM-specs are available in the contrib/cygwin directory in RTEMS's sourcetree.
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Prebuild binaries should be available from
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ftp://ftp.OARCorp.com
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http://packman.links2linux.de
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We further on assume this toolchain to be installed in /opt/i386-cygwin,
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i.e. /opt/i386-cygwin/bin/i386-cygwin-gcc is assumed to be the linux->cygwin
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cross compiler.
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2. Preparations
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---------------
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* Make sure to have /usr/bin and /opt/i386-cygwin/bin in $PATH.
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* Download the source-tarballs and patches. Put them into a directory where
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rpm can pick them up (/usr/src/redhat/SOURCES under RH)
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* configure this directory
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./configure
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[Many files being generated]
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Among these files the rpm.specs will be generated, one per tool in its
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corresponding subdirectory.
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The spec-files you are looking for are:
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binutils/xxx-rtems-binutils.spec
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gcc3newlib/xxx-rtems-gccnewlib.spec
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gdb/xxx-rtems-gdb.spec
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[You must have appropriate versions of autoconf and
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automake installed.]
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3. Building
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-----------
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rpmbuild -ba binutils/xxx-rtems-binutils-<binutilsvers>.spec \
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--define='_build=i686-pc-linux-gnu' \
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--define='_host=i386-cygwin' \
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--target=i386-cygwin
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rpmbuild -ba gcc3newlib/xxx-rtems-gcc-<gccvers>-newlib-<newlibvers>.spec \
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--define='_build=i686-pc-linux-gnu' \
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--define='_host=i386-cygwin' \
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--target=i386-cygwin
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rpmbuild -ba
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gdb/xxx-rtems-gdb-<gdbvers>.spec \
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--define='_build=i686-pc-linux-gnu' \
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--define='_host=i386-cygwin' \
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--target=i386-cygwin
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Each of these commands builds several corresponding rpms.
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[Beware: This can take several hours.]
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NOTE: These packages will be packaged as Linux' rpms, but contain Cygwin
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binaries. If using the default rpm-directories, this will put the rpms into
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your linux RPM-directories, i.e. pollute these directories with foreign
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RPMs.
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To avoid this, I recommend to set up RPM's internal variable %_rpmdir to
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point to a different directory than the default or to use a different root for the cygwin
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RPM directory tree, i.e. to set %_topdir. [1]
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4. Repackaging the RPMS into tarballs
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-------------------------------------
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Basically, there exist two ways:
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* Applying "alien".
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I highly recommend using this, but unfortunately alien is not
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shipped with all Linux distributions.
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[alien can also be applied to repackage the rpms into other packaging
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formats.]
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* Manual unpacking and tar-ing
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cd <empty-directory>
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rpmcpio xxx-rtems-yyy.<arch>.rpm | cpio -i --make-directories
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tar cjvf <where-ever>/xxx-rtems-yyy.<arch>.tar.bz2 opt/rtems
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rm -rf opt/rtems
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NOTE: You might want to consider performing repackaging as root to avoid
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loosing file permissions.
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5. Other platforms
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------------------
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The procedure to build for other platforms (Solaris, ...) is analogous. Just
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replace i386-cygwin with your target, eg sun-sparc-solaris2.8
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Ralf Corsepius 2003-01-31
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[1] Setting up an rpm variable can be done:
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* on the command line:
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rpmbuild --define='_topdir /home/user/src/cygwin' ...
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* from a user's ~/.rpmmacros
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_topdir /home/user/src/cygwin
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@@ -42,6 +42,7 @@ This is binutils sources with patches for RTEMS.
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%build
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cd build
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../binutils-@binutils_version@/configure \
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--build=%_build --host=%_host \
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--target=@target_alias@ \
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--verbose --prefix=%{_prefix} --disable-nls
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