mirror of
https://git.yoctoproject.org/git/poky
synced 2026-01-04 16:10:04 +00:00
bb6ddc3691
This is the result of automated script conversion: scripts/contrib/convert-overrides.py <oe-core directory> converting the metadata to use ":" as the override character instead of "_". (From OE-Core rev: 42344347be29f0997cc2f7636d9603b1fe1875ae) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
59 lines
2.0 KiB
PHP
59 lines
2.0 KiB
PHP
#
|
|
# Notes on the way the OE cross toolchain now works
|
|
#
|
|
# We need a libgcc to build glibc. Tranditionally we therefore built
|
|
# a non-threaded and non-shared compiler (gcc-cross-initial), then use
|
|
# that to build libgcc-initial which is used to build glibc which we can
|
|
# then build gcc-cross and libgcc against.
|
|
#
|
|
# We were able to drop the glibc dependency from gcc-cross, with two tweaks:
|
|
|
|
# a) specify the minimum glibc version to support in a configure option
|
|
# b) create a dummy limits.h file so that later when glibc creates one,
|
|
# the headers structure has support for it. We can do this with a simple
|
|
# empty file
|
|
#
|
|
# Once gcc-cross is libc independent, we can use it to build both
|
|
# libgcc-initial and then later libgcc.
|
|
#
|
|
# libgcc-initial is tricky as we need to imitate the non-threaded and
|
|
# non-shared case. We can do that by hacking the threading mode back to
|
|
# "single" even if gcc reports "posix" and disable libc presence for the
|
|
# libgcc-intial build. We have to create the dummy limits.h to avoid
|
|
# compiler errors from a missing header.
|
|
#
|
|
# glibc will fail to link with libgcc-initial due to a missing "exception
|
|
# handler" capable libgcc (libgcc_eh.a). Since we know glibc doesn't need
|
|
# any exception handler, we can safely symlink to libgcc.a.
|
|
#
|
|
|
|
require libgcc-common.inc
|
|
|
|
DEPENDS = "virtual/${TARGET_PREFIX}gcc"
|
|
|
|
LICENSE = "GPL-3.0-with-GCC-exception"
|
|
|
|
PACKAGES = ""
|
|
|
|
EXTRA_OECONF += "--disable-shared"
|
|
|
|
inherit nopackages
|
|
|
|
# We really only want this built by things that need it, not any recrdeptask
|
|
deltask do_build
|
|
|
|
do_configure:prepend () {
|
|
install -d ${STAGING_INCDIR}
|
|
touch ${STAGING_INCDIR}/limits.h
|
|
sed -i -e 's#INHIBIT_LIBC_CFLAGS =.*#INHIBIT_LIBC_CFLAGS = -Dinhibit_libc#' ${B}/gcc/libgcc.mvars
|
|
sed -i -e 's#inhibit_libc = false#inhibit_libc = true#' ${B}/gcc/Makefile
|
|
}
|
|
|
|
do_configure:append () {
|
|
sed -i -e 's#thread_header = .*#thread_header = gthr-single.h#' ${B}/${BPN}/Makefile
|
|
}
|
|
|
|
do_install:append () {
|
|
ln -s libgcc.a ${D}${libdir}/${TARGET_SYS}/${BINV}/libgcc_eh.a
|
|
}
|