gap-system / gap / 11918
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Files 760
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fingolfin 
buildsys: overhaul dependency tracking

In the past for a source file `src/foo.c` we generated the files
`obj/src/foo.lo` and `obj/src/.deps/foo.d`.

Now we generate `gen/obj/src/foo.c.lo` and `gen/deps/src/foo.c.d`.

Let's unravel this:

- we use `gen` instead of `obj`, matching what the new package
  buildsystem does: there seems to be no point in having two directories
  containing generated content, so let's merge them
- no more hidden `.deps` directories, instead this is out in the open.
- different .d files for C and C++ sources: this removes annoyances
  introduced when converting source files from C to C++; afterwards, a
  `git bisect` (or a switch to a different branch where the conversion
  did not take place) could trigger annoying build errors (which `make
  clean` resolved, but that's of course still annoying)
- likewise: different .lo files for C and C++ sources; while I am not
  aware of any issue this fixes, it allows to simplify the build system
  logic, and also means that adding more file extensions in the future
  is trivial.

Moreover, we now explicitly inform `make` that the .lo and .d files are
generated "together"; and we make `gap` and `libgap` depend on the .d
files, too. This way, if a .d file is lost, we force a rebuild of the
corresponding .lo file, and vice versa. Without this, it can sometimes
happen (e.g. when switching between commits during a `git bisect`) that
these files get "out of sync" and an incorrect build results.

In the future, we might want to rename `gen` to something nice, e.g.
`generated`, `build`, `products`, ... Be my guest in bikeshedding this

278928 of 330590 relevant lines covered (84.37%)

31899075.95 hits per line

Jobs
ID Job ID Ran Files Coverage
1 11918.1 (CFLAGS="--coverage -O2 -g" CXXFLAGS="--coverage -O2 -g" LDFLAGS="--coverage" CONFIGFLAGS="--enable-debug" COVERALLS_PARALLEL=true TEST_SUITES="docomp teststandard") 655
76.87
 Travis Job 11918.1
2 11918.2 (CFLAGS="--coverage -O2 -g" CXXFLAGS="--coverage -O2 -g" LDFLAGS="--coverage" CONFIGFLAGS="--enable-debug" COVERALLS_PARALLEL=true TEST_SUITES="docomp teststandard" ABI=32 CONFIGFLAGS="") 655
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 Travis Job 11918.2
3 11918.3 (CFLAGS="--coverage -O2 -g" CXXFLAGS="--coverage -O2 -g" LDFLAGS="--coverage" CONFIGFLAGS="--enable-debug" COVERALLS_PARALLEL=true TEST_SUITES="docomp teststandard" ABI=64 HPCGAP=yes) 682
77.1
 Travis Job 11918.3
4 11918.4 (CFLAGS="--coverage -O2 -g" CXXFLAGS="--coverage -O2 -g" LDFLAGS="--coverage" CONFIGFLAGS="--enable-debug" COVERALLS_PARALLEL=true TEST_SUITES="testpackages testinstall-loadall" ABI=64) 654
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 Travis Job 11918.4
6 11918.6 (CFLAGS="--coverage -O2 -g" CXXFLAGS="--coverage -O2 -g" LDFLAGS="--coverage" CONFIGFLAGS="--enable-debug" COVERALLS_PARALLEL=true TEST_SUITES="docomp testinstall") 654
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 Travis Job 11918.6
8 11918.8 (CFLAGS="--coverage -O2 -g" CXXFLAGS="--coverage -O2 -g" LDFLAGS="--coverage" CONFIGFLAGS="--enable-debug" COVERALLS_PARALLEL=true TEST_SUITES=testmanuals) 648
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 Travis Job 11918.8
9 11918.9 (CFLAGS="--coverage -O2 -g" CXXFLAGS="--coverage -O2 -g" LDFLAGS="--coverage" CONFIGFLAGS="--enable-debug" COVERALLS_PARALLEL=true TEST_SUITES=testbugfix CONFIGFLAGS="--enable-memory-checking") 640
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 Travis Job 11918.9
13 11918.13 (CFLAGS="--coverage -O2 -g" CXXFLAGS="--coverage -O2 -g" LDFLAGS="--coverage" CONFIGFLAGS="--enable-debug" COVERALLS_PARALLEL=true TEST_SUITES="testinstall" JULIA=yes CONFIGFLAGS="--disable-Werror") 656
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 Travis Job 11918.13
14 11918.14 (CFLAGS="--coverage -O2 -g" CXXFLAGS="--coverage -O2 -g" LDFLAGS="--coverage" CONFIGFLAGS="--enable-debug" COVERALLS_PARALLEL=true TEST_SUITES="docomp testinstall") 653
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 Travis Job 11918.14
15 11918.15 (CFLAGS="--coverage -O2 -g" CXXFLAGS="--coverage -O2 -g" LDFLAGS="--coverage" CONFIGFLAGS="--enable-debug" COVERALLS_PARALLEL=true TEST_SUITES="docomp testinstall") 653
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 Travis Job 11918.15
16 11918.16 (CFLAGS="--coverage -O2 -g" CXXFLAGS="--coverage -O2 -g" LDFLAGS="--coverage" CONFIGFLAGS="--enable-debug" COVERALLS_PARALLEL=true TEST_SUITES="docomp testinstall") 653
72.48
 Travis Job 11918.16
Source Files on build 11918