Enabling c backend testing for integration_tests/test_c_interop_01.py

[czgdp1807]

No description provided.

[czgdp1807]

The file, test_c_interop_01 compiles but I think there are a bunch of features which need to be implemented,

1. Initialising variables at declaration. See the value of pi is printed as 0.
2. abs sometimes doesn't work correctly. It fails even though values are correct. I will have to see what's going on.

[ 33%] Generating test_c_interop_01.c
[ 66%] Building C object CMakeFiles/test_c_interop_01.dir/test_c_interop_01.c.o
[100%] Linking C executable test_c_interop_01
[100%] Built target test_c_interop_01
(lp) 19:47:54:~/lpython_project/lpython/integration_tests % ./test_c_interop_01
0.000000
0.000000
1.000000
ASSERT failed: /Users/czgdp1807/lpython_project/lpython/integration_tests/test_c_interop_01.c
function test_c_callbacks(), line number 52 at 
__lpython_overloaded_0__abs(_lfortran_dsin(pi/(float)(2)) - (float)(1)) < 1.000000e-12

[certik]

I think it's fine, but didn't have time to study carefully. Tests should be fixed first.

[czgdp1807]

Tests should be fixed first.

Will do that once I convert this to ready mode. Meanwhile if you have any thoughts/comments/objections on the changes, then feel free to let me know.

[certik]

I think the changes are good, thanks!

[czgdp1807]

Tests should pass. I hope. 🤞.

[czgdp1807]

Tests pass. This is ready.

[certik]

I don't like commenting out tests, as we need them for LLVM and pure Python too. But fortunately I fixed most of these issues in main already, so I got the asserts working in this PR.