Current state: Compiling `stdlib` with `lfortran`

lfortran_stdlib.md

1. Fetch numfocus-round2 for lfortran branch from here. Do a clean build of lfortran after checking out to numfocus-round2.
2. Fetch master-lfortran for stdlib branch from here. Check out to master-lfortran.
3. Run, FFLAGS=“--non-symtab-only” FC=lfortran cmake . inside stdlib.
4. Run, make. You should be able to see the following logs,

[ 48%] Building Fortran object src/CMakeFiles/fortran_stdlib.dir/stdlib_system.F90.o
[ 49%] Linking Fortran static library libfortran_stdlib.a
warning: /Library/Developer/CommandLineTools/usr/bin/ranlib: archive library: libfortran_stdlib.a the table of contents is empty (no object file members in the library define global symbols)
[ 49%] Built target fortran_stdlib
Scanning dependencies of target test_always_skip
[ 50%] Building Fortran object src/tests/CMakeFiles/test_always_skip.dir/test_always_skip.f90.o
semantic error: Module 'stdlib_error' not declared in the current source and the modfile was not found
 --> /Users/czgdp1807/lfortran_project/stdlib/src/tests/test_always_skip.f90:3:1
  |
3 | use stdlib_error, only: check
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 

5. Now, fetch stdlib_non_symtab for lfortran from here. Do a clean build after checking out to stdlib_non_symtab.
6. Run, FC=lfortran cmake . and then make in stdlib. Though note that for stdlib you don’t have to change in branches. You should be able to see the following logs,

Note: if any of the above error or warning messages are not clear or are lacking
context please report it to us (we consider that a bug that needs to be fixed).
[ 24%] Building Fortran object src/CMakeFiles/fortran_stdlib.dir/stdlib_bitsets.f90.o
[ 25%] Building Fortran object src/CMakeFiles/fortran_stdlib.dir/stdlib_bitsets_64.f90.o

Please let me know if you face any problem in the above steps. Thanks.