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The Meson Build System http://mesonbuild.com/
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meson/test cases/common/222 source set custom target/g.c

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new module "sourceset" to match source file lists against configuration data In QEMU a single set of source files is built against many different configurations in order to generate many executable. Each executable includes a different but overlapping subset of the source files; some of the files are compiled separately for each output, others are compiled just once. Using Makefiles, this is achieved with a complicated mechanism involving a combination of non-recursive and recursive make; Meson can do better, but because there are hundreds of such conditional rules, it's important to keep meson.build files brief and easy to follow. Therefore, this commit adds a new module to satisfy this use case while preserving Meson's declarative nature. Configurations are mapped to a configuration_data object, and a new "source set" object is used to store all the rules, and then retrieve the desired set of sources together with their dependencies. The test case shows how extract_objects can be used to satisfy both cases, i.e. when the object files are shared across targets and when they have to be separate. In the real-world case, a project would use two source set objects for the two cases and then do "executable(..., sources: ... , objects: ...)". The next commit adds such an example.
6 years ago
#include "all.h"
void g(void)
{
}