Portability improvements to Boost Dependency
The Boost dependency has been improved to better detect the various ways to
install boost on multiple platforms. At the same time the
for the dependency has been changed. Previously it was allowed to specify
header directories as
modules but it wasn't required. Now, modules are only
used to specify libraries that require linking.
This is a breaking change and the fix is to remove all modules that aren't found.
Generator learned capture
Generators can now be configured to capture the standard output. See
test cases/common/98 gen extra/meson.build for an example.
Can index CustomTarget objects
CustomTarget object can now be indexed like an array. The resulting
object can be used as a source file for other Targets, this will create a
dependency on the original
CustomTarget, but will only insert the generated
file corresponding to the index value of the
c = custom_target( ... output : ['out.h', 'out.c'], ) lib1 = static_library( 'lib1', [lib1_sources, c], ... ) exec = executable( 'executable', c, link_with : lib1, )
Can override executables in the cross file
The cross file can now be used for overriding the result of
find_program. As an example if you want to find the
command and have the following definition in your cross file:
[binaries] ... objdump = '/usr/bin/arm-linux-gnueabihf-objdump-6'
Then issuing the command
find_program('objdump') will return the
version specified in the cross file. If you need the build machine's
objdump, you can specify the
native keyword like this:
native_objdump = find_program('objdump', native : true)
Easier handling of supported compiler arguments
A common pattern for handling multiple desired compiler arguments, was to test their presence and add them to an array one-by-one, e.g.:
warning_flags_maybe = [ '-Wsomething', '-Wanother-thing', '-Wno-the-other-thing', ] warning_flags =  foreach flag : warning_flags_maybe if cc.has_argument(flag) warning_flags += flag endif endforeach cc.add_project_argument(warning_flags)
A helper has been added for the foreach/has_argument pattern, so you can now simply do:
warning_flags = [ ... ] flags = cc.get_supported_arguments(warning_flags)
Better support for shared libraries in non-system paths
Meson has support for prebuilt object files and static libraries. This release adds feature parity to shared libraries that are either in non-standard system paths or shipped as part of your project. On systems that support rpath, Meson automatically adds rpath entries to built targets using manually found external libraries.
This means that e.g. supporting prebuilt libraries shipped with your source or provided by subprojects or wrap definitions by writing a build file like this:
project('myprebuiltlibrary', 'c') cc = meson.get_compiler('c') prebuilt = cc.find_library('mylib', dirs : meson.current_source_dir()) mydep = declare_dependency(include_directories : include_directories('.'), dependencies : prebuilt)
Then you can use the dependency object in the same way as any other.
The Wrap dependency system now
supports Subversion (svn). This
support is rudimentary. The repository url has to point to a specific
(sub)directory containing the
meson.build file (typically
trunk/). However, providing a
revision is supported.
The results of the search are