TODO: Replace the references to local paths.
oilgen (the basis of Ahead Of Time compilation for OIL) has never been passed
through our large test suite and has instead had more focused testing and large
examples. When consuming DWARF information in a similar fashion to JIT OIL this
was okay, but with the new Clang AST based mechanism it means we have very
little coverage.
This change adds an oilgen test for every test case that has an oil test.
Relying on the build system to create the test target as before would make it
difficult to have failing tests, so we move the build into the integration test
runner. This involves:
1. Writing the input source to a file.
2. Consuming it with oilgen to get the implementation object file.
3. Compiling the input source and linking it with this file.
4. Running the newly created target.
This approach can give the full error message at any stage that fails and will
fail the test appropriately. The downside is the build system integration is
more difficult, as we need the correct compiler flags for the target and to use
the correct compiler. It would be very tricky to replicate this in a build
system that's not CMake, so we will likely only run these tests in open source.
Test plan:
- CI
213dba4325