Diffstat (limited to 'NEWS')
1 files changed, 35 insertions, 22 deletions
@@ -11,15 +11,14 @@ Version 0.3.0
* Replacement of a source file (e.g., foo.cpp with foo.cxx).
* Removal of a file from a library/executable.
- * Support for the Intel C++ compiler on Linux.
* New command line variable override semantics. A command line variable can
be an override (=), prefix (=+), or suffix (+=), for example:
b config.cxx=clang++ config.cxx.coptions+=-g config.cxx.poptions=+-I/tmp
- Prefixes/suffixes are applied at the outsets of values set in buildfiles
- provided these values were set using =+/+= and not expansion, for example:
+ Prefixes/suffixes are applied at the outsets of values set in buildfiles,
+ provided these values were set (in those buildfiles) using =+/+= and not
+ expansion, for example:
b x=+P x+=S
@@ -35,15 +34,15 @@ Version 0.3.0
x = A $x B
print $x # A P p y s S B
- By default an override is applied in all the projects mentioned in the
- buildspec as well as in their subprojects. We can restrict an override
- to not apply in subprojects by prefixing it with '%', for example:
+ By default an override applies to all the projects mentioned in the
+ buildspec as well as to their subprojects. We can restrict an override to
+ not apply to subprojects by prefixing it with '%', for example:
b %config.cxx=clang++ configure
- An override can also be made global (i.e., it applies in all projects,
- including imported) by prefixing it with '!'. As an example, compare
- these two command lines:
+ An override can also be made global (i.e., it applies to all projects,
+ including imported) by prefixing it with '!'. As an example, compare these
+ two command lines:
@@ -59,13 +58,6 @@ Version 0.3.0
- * 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++
* Attribute support. Attributes are key or key=value pairs enclosed in 
and separated with spaces. They come before the entity they apply to.
Currently we recognize attributes for variables and values. For variables
@@ -94,7 +86,7 @@ Version 0.3.0
that is used by another project for something completely different. As a
result, typing of values (see below) is recommended over variables. If you
do type a variable, make sure it has a namespace (typing of unqualified
- variables may become an illegal).
+ variables may become illegal).
For values we recognize the same set of types plus 'null'. The value type
is preserved in prepend/append (=+/+=) but not in assignment. For example:
@@ -112,12 +104,27 @@ Version 0.3.0
x = [null]
print $x # [null]
- * Add support for scope/target-qualified variable expansion. For example:
+ Value attributes can also be used in the evaluation contexts, for example:
+ if ($x == [null])
+ if ([uint64] $x == [uint64] 0)
+ * Support for scope/target-qualified variable expansion. For example:
+ * 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++
+ * Support for the Intel C++ compiler on Linux.
* Implement C++ compiler detection. Currently recognized compilers and their
ids (in the <type>[-<variant>] form):
@@ -166,15 +173,21 @@ Version 0.3.0
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
+ (which requires clean/reconfigure) led to all its prerequisites being
+ cleaned as well and then rebuilt. That was surprising, to say the least.
* Allow escaping in double-quoted strings.
* Implement --buildfile option that can be used to specify the alternative
file to read build information from. If '-' is specified, read from STDIN.
+ * New scoping semantics. The src tree paths are no longer entered into the
+ scope map. Instead, targets from the src tree now include their out tree
+ directories (which are, in essence, their "configuration", with regards to
+ variable lookup). The only user-visible result of this change is the extra
+ '@<out-dir>/' suffix that is added when a target is printed, for example,
+ as part of the compilation command lines.
* First public release.