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unittest: update coverage library non gcc toolchains

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When building with clang, the unittests were giving us an error:
```
error: undefined symbol: llvm_gcda_start_file
```

This seems to be from linking in `gcov` regardless of the toolchain.
It appears that clang doesn't need any special library for coverage.
With this change the following now produce identical coverage reports:

```
$ ZEPHYR_TOOLCHAIN_VARIANT=zephyr ./scripts/twister -p unit_testing \
  --coverage -i -T tests/unit/intmath/
$ ZEPHYR_TOOLCHAIN_VARIANT=host ./scripts/twister -p unit_testing \
  --coverage -i -T tests/unit/intmath/
$ ZEPHYR_TOOLCHAIN_VARIANT=llvm ./scripts/twister -p unit_testing \
  --coverage -i --coverage-tool lcov                              \
  --gcov-tool $(pwd)/scripts/utils/llvm-gcov.sh                   \
  -T tests/unit/intmath/
```

Signed-off-by: Yuval Peress <peress@google.com>
This commit is contained in:
Yuval Peress 2022-11-06 22:43:14 -07:00 • committed by Anas Nashif
commit fae9923ff2
6 changed files with 24 additions and 18 deletions
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2
tests/unit/crc/CMakeLists.txt
View file

@ -2,6 +2,6 @@
cmake_minimum_required(VERSION 3.20.0)
project(crc)
find_package(Zephyr COMPONENTS unittest REQUIRED HINTS $ENV{ZEPHYR_BASE})
project(crc)
target_sources(testbinary PRIVATE main.c)