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Version 0.3.0
* Support for High Fidelity Builds (HFB).
The C++ compiler and link rules now detect when the compiler, options, or
input file set have changed and trigger the update of the target. Some
examples of the events that would now trigger an automatic update:
* Compiler change (e.g., g++ to clang++), upgrade, or reconfiguration.
* Change of compile/link options (e.g., -O2 to -O3).
* Rename of a source file name (e.g., foo.cpp to foo.cxx).
* Removal of a file from a library/executable.
* Support for the Intel C++ compiler on Linux.
* Command line options, variables, and buildspec can now be specified in any
order. This is especially useful if you want to re-run the previous
command with -v or add a forgotten config variable:
b test -v
b configure config.cxx=clang++
* Implement C++ compiler detection. Currently recognized compilers and their
ids (in the <type>[-<variant>] form):
gcc GCC
clang Vanilla Clang
clang-apple Apple Clang (and the g++ "alias")
icc Intel icpc
msvc Microsoft cl.exe
The compiler id, version, and other information is available via the
following build system variables:
cxx.id
cxx.id.{type,variant}
cxx.version
cxx.version.{major,minor,patch,build}
cxx.signature
cxx.checksum
cxx.target
cxx.target.{cpu,vendor,system,version,class}
* Implement ar/ranlib detection. The following information is available
via the build system variables:
bin.ar.signature
bin.ar.checksum
bin.ranlib.signature
bin.ranlib.checksum
* On update for install the C++ link rule no longer uses the -rpath
mechanism for finding prerequisite libraries.
* Set build.host, build.host.{cpu,vendor,system,version,class} build system
variables to the host triplet. By default it is set to the compiler target
build2 was built with but a more precise value can be obtained with the
--config-guess option.
* Set build.version, build.version.{major,minor,patch,release,string} build
system variables to the build2 version.
* Extracted header dependencies (-M*) are now cached in the auxiliary
dependency (.d) files rather than being re-extracted on every run. This
speeds up the up-to-date check significantly.
* Revert back to only cleaning targets in subdirectories.
Cleaning everything as long as it is in the same strong amalgamation had
some undesirable side effects. For example, in bpkg, upgrading a package
(which requires clean/reconfigure) led to all its prerequisite being
cleaned as well and then rebuilt. That was very surprising, to say the
least.
* Allow escaping in double-quoted strings.
Version 0.2.0
* First public release.
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