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author | Tiago Gomes <tiago.gomes@codethink.co.uk> | 2015-01-12 15:13:53 +0000 |
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committer | Tiago Gomes <tiago.gomes@codethink.co.uk> | 2015-01-23 15:19:29 +0000 |
commit | fe5e9e45bb56bccb6c6ad755b21074ce4df26a02 (patch) | |
tree | 487090b1a60e693affaab57fe0e3eea53909481e /strata/build-essential/stage2-libstdc++.morph | |
parent | d022ac34d44616e7c7479a0aa1e81287786f3299 (diff) | |
download | definitions-fe5e9e45bb56bccb6c6ad755b21074ce4df26a02.tar.gz |
Update GCC to 4.9.2
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.
Diffstat (limited to 'strata/build-essential/stage2-libstdc++.morph')
-rw-r--r-- | strata/build-essential/stage2-libstdc++.morph | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/strata/build-essential/stage2-libstdc++.morph b/strata/build-essential/stage2-libstdc++.morph new file mode 100644 index 00000000..3d89ad85 --- /dev/null +++ b/strata/build-essential/stage2-libstdc++.morph @@ -0,0 +1,36 @@ +name: stage2-libstdc++ +kind: chunk +configure-commands: +- mkdir o + +# Configure flag notes: +# 1. The thread C++ library cannot be built, as the thread C library +# was not build in stage1-gcc. +# 2. Prevents the installation of precompiled include files, which are +# not needed at this stage. +# 3. From LFS: the header location of C++ needs to be explicitly given +# as we are running the configure script from the top-level +# directory. +- | + export STAGE2_SYSROOT="$(dirname $(pwd))" + # -fPIC must be given, otherwise it will not be possible to create + # shared libraries linked to libstdc++ + export CPPFLAGS="--sysroot=$STAGE2_SYSROOT -fPIC" + export LDFLAGS="--sysroot=$STAGE2_SYSROOT" + cd o && ../libstdc++-v3/configure \ + --build=$(sh ../config.guess) \ + --host="$TARGET_STAGE1" \ + --target="$TARGET_STAGE1" \ + --prefix="$PREFIX" \ + --disable-nls \ + --disable-shared \ + --disable-multilib \ + `# [1]` --disable-libstdcxx-threads \ + `# [2]` --disable-libstdcxx-pch \ + `# [3]` --with-gxx-include-dir=/tools/"$TARGET_STAGE1"/include/c++/4.9.2 + +build-commands: +- cd o && make + +install-commands: +- cd o && make DESTDIR="$DESTDIR" install |