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Reviewed-by: Tiago Gomes <tiago.gomes@codethink.co.uk>
Reviewed-By: Richard Maw <richard.maw@gmail.com>
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Update the GCC compiler to the 4.9.2 version. It turns out that a C++
compiler is required to build the latest GCC releases, so build one in
stages 1 and 2 as well.
The updated list of GCC configuration options that either don't work in
a cross compiler or are not needed in a temporary compiler, were based
on the latest instructions from Linux From Scratch.
The inclusion of /lib64 in the lib path for the stage 1 linker is an
attempt to turn things more robust rather than to just symlink in /lib
stuff that ends up installed in /lib64 (as it is already being done for
libgcc_s.so). Ideally, we should configure every chunk to install to
/lib, however GCC seems to not honour the `--with-libdir` configuration
flag.
With this version of GCC, it looks like a sysroot needs to be given at
configure time so that `--with-native-system-header-dir` does what it
claims to do. Unfortunately, this has the side effect of making GCC not
passing to the linker the linker sysroot flag: `-Wl,--sysroot=$SYSROOT`.
The workaround is to modify LDFLAGS to give a sysroot directly to GCC,
`--sysroot=$SYSROOT`, which will then be further passed down to the
linker.
As the newest version of GCC finds more warnings than the previous one,
`-Werror` was disabled for the coreutils, GDB and Syslinux projects.
Syslinux's Makefile had to be patched, as it is not possible to disable
`-Werror` for all targets through the NO_WERROR variable.
The hack to handle libgcc_eh being required during eglibc's build was
removed, as it doesn't seem to be the case anymore.
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M4 is required to manipulate the assembly code in GMP. GMP is a math
library required to build GCC.
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Although we are not using this style in any other morphologies, it
makes it easier to parse.
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If the BUILD system is unable to directly run TARGET binaries then it
fails during the preparation of stage2-fake-bash because it incorrectly
build-depends on stage2-busybox.
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To remove unneded systemd units
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These patches are needed to:
- Support the name change of the dynamic linker in the new
version of glibc.
- Build gcc in x86_32.
- Remove old morphology files.
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These patches are needed to:
- Build gcc in armv7b.
- Support the name change of the dynamic linker in the new
version of glibc.
- Remove the old morphology files.
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This change is to prepare the transition to glibc since
the latter is going to need bash to build.
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This patch is needed because glibc rearranged its headers to not
leak as many definitions unintentionally, but busybox was relying on
the leaked definitions.
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The 'make mrproper' command now requires GNU Bash, but since we start
from a clean Git checkout of linux.git we can just remove that from the
build command list.
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