https://github.com/YosysHQ/yosys/releases/tag/yosys-0.37
The change to the patch is needed to fix this error on macOS:
```
+ clang -std=c++11 -O2 -o cxxrtl-test-value -I../../backends/cxxrtl/runtime test_value.cc -lstdc++
test_value.cc:1:10: fatal error: 'cassert' file not found
^~~~~~~~~
1 error generated.
make: *** [Makefile:891: test] Error 1
```
https://github.com/YosysHQ/yosys/releases/tag/yosys-0.33
A patch needed to be adapted to fix this error on macOS:
```
+ clang -std=c++11 -o yosys-always_full -I../.. always_full_tb.cc -lstdc++
In file included from always_full_tb.cc:1:
In file included from ./yosys-always_full.cc:1:
../../backends/cxxrtl/cxxrtl.h:29:10: fatal error: 'cstddef' file not found
#include <cstddef>
^~~~~~~~~
1 error generated.
make: *** [Makefile:885: test] Error 1
```
This fixes the patch introduced in:
94a047ca74 (yosys: fix build on darwin, 2021-11-09)
Because we supply yosys with an external build of ABC, the patched
ABCMKARGS variable is without influence. Even if we were building with
in-tree ABC, that part of the patch is wrong, so drop it altogether.
