Since EAPI=7 was supported, portage can no longer use different
ROOT and SYSROOT values. This adjusts the paths so that the first
phase builds cross-toolchains under /usr/${CHOST}, then the native
toolchains are built under /build/${BOARD} (as was being done
previously). Now that the cross-toolchain development files can't
be used when building the native toolchain, the headers and libs
are stupidly copied into the board root to be used used and then
overwritten by the board packages as they are built. Since this is
all done in a chroot, these changes shouldn't affect the SDK host.
This is required for the eventual removal of `$PORTDIR` and
`$PORTDIR_OVERLAY` and ensures toolchain rebuilds/updates with
`./build_packages --nousepkg` don't erroniously try to use ebuilds from
`/usr/portage` inside of the SDK.
In order to fix up the build_toolchains script the crossdev overlay
needs to be setup properly, previously only setup_board did it.
Overall silences a lot of warnings and fixes an issue with crossdev:
/usr/bin/emerge-wrapper: line 48: /eclass/toolchain-funcs.eclass: No such file or directory
/usr/bin/emerge-wrapper: line 49: tc-arch: command not found
The portage CBUILD and HOSTCC variables need to be set to the SDK host to get
a proper cross build when building target binaries.
Change _configure_sysroot to use the CBUILD environment variable to set the
CBUILD and HOSTCC variables of ${ROOT}/etc/portage/make.conf. Also, fix up all
calls to _configure_sysroot to set the CBUILD environment variable.
Fixes setup_board failure when the host and target architectures differ.
Signed-off-by: Geoff Levand <geoff@infradead.org>
[marineam: fixed a copy/paste error]
Now this code can be shared with setup_board. Only required if
setup_board is called with --nousepkg which is rare to never but feels
like the correct thing to do. Alternatively setup_board could always
use binary packages (as it basically does now).
This replaces the cross-toolchain compile step in bootstrap_sdk and adds the
ability to build native toolchains using the cross toolchain. This is just
the first step towards actually providing the native toolchain in a container.
