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This will make possible to modern distros (with gcc 6) to build
current baserock (which uses gcc 5)
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69959
Fixes #8
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The following error was happening after upgrading to GCC 5.3.0
in armv7lhf builds:
Switch "--with-arch" may not be used with switch "--with-cpu"
Also, I could find other places where this flag was removed when
upgrading to GCC 5:
http://pkgs.fedoraproject.org/cgit/rpms/gcc.git/commit/gcc.spec?id=7f999936529d6902d43c8cc807ceb3a6843f3072
Change-Id: Ib3934098518dc496d3c9d29a9c7f97a7cfeab9c7
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The BSD 'sed' used on Mac OS X is a bit rubbish compared with GNU 'sed'.
Change-Id: Ic26878301b49099252b04d8a0854e551c352ad54
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Change-Id: Id7b85f0700e2b422a1a610d09d76e038e14db73c
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This will make it easier to advance refs later.
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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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No functional changes here. It will ease the review of the following
commmits.
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These will have been lost in the automated chunks-in-definitions
transition.
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