NAME

       cross-gcc-gensource - generates sources to build a Debian cross toolchain

SYNOPSIS

        [TARGET_LIST=<arches to target>] [HOST_LIST=<build arches>] [SUFFIX=.1] cross-gcc-gensource <gcc-version>

        example:
        /tmp$ TARGET_LIST="armel armhf" HOST_LIST="amd64" cross-gcc-gensource 5

        .... lots of verbose output ....

        /tmp$ cd cross-gcc-packages-amd64/cross-gcc-5-armel

        /tmp/cross-gcc-packages-amd64/cross-gcc-5-armel$ ls

        debian

        /tmp/cross-gcc-packages-amd64/cross-gcc-5-armel$ dpkg-buildpackage

        .... building cross-toolchain ....

DESCRIPTION

       This is a utility that prepares a directory with debianized sources which build cross
       toolchain packages. The sources produced by this tool are very small; the code itself
       comes from the "gcc-version-source" package and the necessary patches and extra build
       stuff comes from the "cross-gcc-dev" package.

ARGUMENTS

       Normal usage is

        cross-gcc-gensource gcc_version

       Where "gcc_version" is the base version of the toolchain we're building. At the time of
       this writing we know about versions 4.9, 5, 6, 7, 8. This commandline argument is
       required.

   Specifying the target architectures
       This tool generates a separate source package for each target architecture (the
       architecture targetted by the cross-compiler being built). By default these architectures
       are targetted:

       arm64
       armel
       armhf
       mips
       mipsel
       powerpc
       ppc64el

       If a different set of target architectures is required, set the "TARGET_LIST" environment
       variable. For instance, to build for "armel" and "armhf":

        TARGET_LIST="armel armhf" cross-gcc-gensource 5

   Specifying the host architectures
       Similarly, this tool generates a separate source tree for each host architecture (the
       architecture the cross-compiler being built runs on). By default these architectures are
       targetted:

       amd64
       i386

       If a different set of host architectures is required, set the "HOST_LIST" environment
       variable. For instance, to build just for "amd64":

        HOST_LIST="amd64" cross-gcc-gensource 5

   Specifying a verison suffix
       If you need to upload a new source package when the version of gcc-source built-against
       hasn't changed, then you need to add a version suffix to avoid binary-version clashes. An
       optional SUFFIX env var allows this.

        TARGET_LIST="armel armhf" SUFFIX=.1 cross-gcc-gensource 5