[build2] build2 0.11.0 released

[Boris Kolpackov]

We have released build2 toolchain version 0.11.0. This release contains a
large number of new features across all the tools (build system, dependency
managers, etc). It also includes experimental support for C++ modules header
unit importation and include translation.

A note on backwards compatibility: in this release we have extended the
numeric representation of the standard versioning scheme. As a result,
this release cannot be upgraded to from 0.10.0 and has to be installed
from scratch. Additionally, while existing libraries created with bdep-new
will continue to work, the comment that describes the versioning scheme in
version.hxx.in (or equivalent) will no longer be accurate. The easiest way
to fix this is to run bdep-new on the side to create an identically-named
project and copy the new version.hxx.in over.

The corresponding NEWS file entries are included below with a more detailed
discussion of the major new features available in the release notes:

  https://build2.org/release/0.11.0.xhtml

This release has been tested on Windows, Linux, Mac OS, and FreeBSD with
GCC, Clang (both vanilla and Apple's), MinGW GCC, and MSVC (14, 15, and
16). A big thank you to everyone who helped test staged snapshots.

The following new build configurations have been added to the CI service:

  linux_debian_9-gcc_9.1
  linux_debian_9-clang_8.0

  macos_10.14-clang_10.0
  macos_10.14-gcc_9.1_homebrew

  windows_10-msvc_16.1

For the complete list of available build configurations see:

  https://ci.cppget.org/?build-configs

Installation instructions:

  https://build2.org/install.xhtml

Download directory:

  https://download.build2.org/0.11.0/

SHA256 checksums:

  37396ed937f94cf02d51c6b9f21c8cc0f95384a6325059eb24a5eba0affcd504 *build2-install-0.11.0.sh
  3aa16ba0aae052ec59c622a29db9fb4834ac9bda188094ace6e193ce6aff91cb *build2-install-msvc-0.11.0.bat
  213a829f12917a6febee42740f7804f1fc687f374b983e640afd75c479b11c37 *build2-install-mingw-0.11.0.bat

  653bb75f31ca05760eba62bb6727d11a9f0d8ce4aa2fc1fb996d7ef6e76a4938 *build2-toolchain-0.11.0.tar.xz
  c0232481826d9881bed1d29b4a75e56cb8ce12b3c37b2b34b24e0a59a1d1b271 *build2-toolchain-0.11.0.tar.gz

  2353dae2b39706a4a80dbf2e5e28c99355b753f3986256c1c9a7e99485d1a70b *build2-baseutils-0.11.0-x86_64-windows.zip
  65e3becc2edf7989d78569a72d030a88467fc5fb9c7b262d0d1f4575479c040c *build2-mingw-0.11.0-x86_64-windows.tar.xz

Repository certificate fingerprint for cppget.org:

  86:BA:D4:DE:2C:87:1A:EE:38:C7:F1:64:7F:65:77:02:15:79:F3:C4:83:C0:AB:5A:EA:F4:F7:8C:1D:63:30:C6

NEWS file entries:

build2 version 0.11.0

  * Initial work on header unit importation and include translation support.

    In particular, for GCC, the (experimental) module mapper approach is now
    used to handle header unit importation, include translation, and headers
    dependency extraction, all with support for auto-generated headers.

  * Generalized target/prerequisite variable blocks.

    Target/prerequisite-specific variable blocks can now be present even if
    there are prerequisites. For example, now instead of:

    exe{foo}: cxx{foo}
    exe{foo}: cc.loptions += -rdynamic

    Or:

    exe{foo}: cxx{foo}
    exe{foo}:
    {
      cc.loptions += -rdynamic
      cc.libs += -ldl
    }

    We can write:

    exe{foo}: cxx{foo}
    {
      cc.loptions += -rdynamic
      cc.libs += -ldl
    }

    This also works with dependency chains in which case the block applies to
    the set of prerequisites (note: not targets) before the last ':'. For
    example:

    ./: exe{foo}: libue{foo}: cxx{foo}
    {
      bin.whole = false  # Applies to the libue{foo} prerequisite.
    }

  * Support for ad hoc target groups.

    In certain cases we may need to instruct the underlying tool (compiler,
    linker, etc) to produce additional outputs. For example, we may want to
    request the compiler to produce an assembler listing or the linker to
    produce a map file. While we could already pass the required options, the
    resulting files will not be part of the build state. Specifically, they
    will not be cleaned up and we cannot use them as prerequisites of other
    targets.

    Ad hoc target groups allow us to specify that updating a target produces
    additional outputs, called ad hoc group members. For example:

    <exe{hello} file{hello.map}>: cxx{hello}
    {
      cc.loptions += "-Wl,-Map=$out_base/hello.map"
    }

    <obje{hello} file{hello.lst}>:
    {
      cc.coptions += "-Wa,-amhls=$out_base/hello.lst"
    }

    Note also that all things ad hoc (prerequisites, targets, rules) are still
    under active development so further improvements (such as not having to
    repeat names twice) are likely.

  * New config.{c,cxx}.std configuration variables that, if present, override
    {c,cxx}.std specified at the project level.

    In particular, this allows forcing a specific standard for all the projects
    in a build configuration, for example:

    $ b create: exp-conf/,cc config.cxx=g++ config.cxx.std=experimental

  * New --dry-run|-n option instructs build rules to print commands without
    actually executing them.

    Note that commands that are required to create an accurate build state
    will still be executed and the extracted auxiliary dependency information
    saved. In other words, this is not the "don't touch the filesystem" mode
    but rather "do minimum amount of work to show what needs to be done". In
    particular, this mode is useful to quickly generate the compilation
    database, for example:

    $ b -vn clean update |& compiledb

  * Ability to disable automatic rpath, support for custom rpath-link.

    Specifically, the new config.bin.rpath.auto variable can be used to
    disable the automatic addition of prerequisite library rpaths, for
    example:

    $ b config.bin.rpath.auto=false

    Note that in this case rpath-link is still added where normally required
    and for target platforms that support it (Linux and *BSD).

    The new config.bin.rpath_link and config.bin.rpath_link.auto have the same
    semantics as config.bin.rpath* but for rpath-link.

  * Enable MSVC strict mode (/permissive-) for 'experimental' standard
    starting from version 15.5.


bdep version 0.11.0

  * The bdep-new command now by default adds a README.md template. This can be
    suppressed with the new no-readme project type sub-option. For example:

    $ bdep new -t exe,no-readme hello

  * New license=<name> bdep-new project type sub-option allows specifying a
    project license. For example:

    $ bdep new -t exe,license=MIT hello

    Commonly used license names are 'MIT', 'ASLv2' (Apache License 2.0),
    'GPLv3', and 'proprietary' (see the 'license' package manifest value
    documentation for a more extensive list of names). Note that if the
    license is not specified, the default is now 'proprietary' instead of
    'TODO'.

  * New bdep-new --post-hook option allows the execution of customization
    commands in the newly created project. For example:

    $ bdep new --post-hook "echo .idea/ >>.gitignore" hello

    See the bdep-new(1) man pages for details.

  * The bdep-ci command now allows overriding certain manifest values in
    packages being submitted for testing. This is primarily useful for
    specifying alternative build configurations and/or build notification
    emails. For example:

    $ bdep ci --builds gcc

    See the bdep-ci(1) man pages for details.

  * New bdep-release --amend and --squash options allow releasing a revision
    by squashing and amending one or more existing commits.

  * New --existing|-e option for bdep-{init,new} --config-create|-C and
    bdep-config create modes. With this option bdep initializes a bpkg
    configuration based on an existing build system configuration instead of
    creating a new one from scratch. For example:

    $ b create: build-clang/,cc config.cxx=clang++
    $ bdep new -C build-clang --existing hello


bpkg version 0.11.0

  * The 'tags' package manifest value has been deprecated and replaced with
    'keywords' (list of space-separated words) and 'topics' (list of comma-
    separated, potentially multi-word concepts). For example:

    topics: xml parser, xml serializer
    keywords: sax dom

  * New 'description-type' package manifest value allows specifying the
    content type of the 'description' or 'description-file' value. Currently,
    recognized values are:

    text/plain
    text/markdown
    text/markdown;variant=GFM
    text/markdown;variant=CommonMark

  * New 'upstream-version' package manifest value allows preserving the
    original version for information.

  * The pkg-build command can now "build" a system package that doesn't have a
    stub provided its version is specified explicitly. For example:

    $ bpkg build ... ?sys:libsqlite3/* ?sys:libcurl/7.47.0

  * New cfg-create --existing|-e option allows initializing a bpkg
    configuration based on an existing build system configuration instead of
    creating a new one from scratch. For example:

    $ b create: build-clang/,cc config.cxx=clang++
    $ bpkg create -d build-clang --existing

  * New rep-info --deep option triggers the replacement of '*-file' package
    manifest values with the contents of the referenced files.


brep version 0.11.0

  * Support for displaying Markdown package descriptions.

  * Support for displaying new package manifest values: 'upstream-version',
    'topics', and 'keywords.

  * Various page style cleanups and improvements.