On 11/26/2013 10:52 AM, Joseph S. Myers wrote: > On Tue, 26 Nov 2013, Jan-Benedict Glaw wrote: > >>> The idea if config-list.mk is not to build every conceivable target >>> configuration, but to give a reasonable converage of the different >>> target architectures and OS/library configurations so that you can >>> effectively test a patch with unknown target-specific impact. >> >> Is it like that? My impression is/was that people collected a list of >> targets they somewhat care for. With around 200 configurations, among >> them some that are quite similar, adding another just adds 1/2%, which >> I'd call neglectible. > > For example, the list should include at least one target for every target > header in GCC. So if there's a header specific to an (architecture, OS) > pair, a matching configuration should be included. >
It is true that the RTEMS configurations are generally similar to the *-elf ones. However, we turn on pthreads support in C++ and multitasking in the languages which have it including Ada. We have good test results even in FORTRAN. With tasking and filesystem support on near bare metal, *-rtems can potentially be used to test a lot more than *-elf. For the basic code generation, there likely isn't much difference. I often can reproduce our code generation problems using *-elf. But we have different code and more code. The key to seeing the value of testing *-rtems is moving beyond "builds or not" and into running tests on more languages. as to Joern's question: > Is there something that microblaze-rtems exposes that is not already > covered by other microblaze or rtems targets that are already included? I believe it was on the microblaze where someone broke the libgcc pattern for rtems by changing the pattern from XXX*-*-* to XXX*-*-elf. Plus we do have at least one OS/Target specific file for each *-rtems configuration. There is at least a config/*/*rtems*.h and often a config/*/t-* which is specific to RTEMS. Plus config/*rtems* is used in all *-rtems targets. -- Joel Sherrill, Ph.D. Director of Research & Development joel.sherr...@oarcorp.com On-Line Applications Research Ask me about RTEMS: a free RTOS Huntsville AL 35805 Support Available (256) 722-9985
