Manual conversion of Baserock's build-essential stratum

This huge commit is a manual conversion, notes on what was
needed:

  o project.conf defines the arch specific stuff which was
    previously hardcoded into YBD, so the stage1 target and target
    etc are all defined by the build-essential project.conf

  o Direct and easy changes for git source representation

  o Added stage1.bst & stage2.bst "stacks", everything built in
    stage2 build-depends on stage1.bst, and the final build-essential
    products build-depend on stage2.bst (note build-depend means
    to depend _only_ for building, not propagated forward).

  o Instead of using host tools we build on the GNOME flatpak
    sdk/platform bundles

  o Some build-essential morph files use $(dirname $(pwd)) for a sysroot,
    which is weird, it means the morph files rely on building at one directory
    below the slash sysroot - in buildstream we build in /buildstream/build
    which is two - had to replace these with $(dirname $(dirname $(pwd))) instead

  o Remove the devices sections from the fhs-dirs elements, not allowed
    to create static device nodes in buildstream.

1 files changed, 55 insertions, 0 deletions

diff --git a/build-essential/stage2-libstdcxx.bst b/build-essential/stage2-libstdcxx.bst
new file mode 100644
index 00000000..f8a75a23
--- /dev/null
+++ b/build-essential/stage2-libstdcxx.bst
@@ -0,0 +1,55 @@
+kind: manual
+
+sources:
+- kind: git
+  url: upstream:gcc-tarball
+  track: baserock/build-essential
+  ref: b3c9b176c1f10ebeff5700eb3760e9511f23fa06
+
+depends:
+- filename: build-essential/stage1.bst
+  type: build
+- build-essential/stage2-linux-api-headers.bst
+- build-essential/stage2-glibc.bst
+
+variables:
+  prefix: /tools
+
+environment:
+  PATH: /tools/bin:/usr/bin:/bin:/usr/sbin:/sbin
+
+config:
+  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 $(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="%{install-root}" install