Compiling benchmark.f and feq-parse packages with LFortran

LFortran is a modern, interactive Fortran compiler built on LLVM that aims to support real-world Fortran codebases. This project focuses on enabling full compilation and correct execution of two real-world Fortran packages benchmark.f (a benchmarking library) and feq-parse (an equation parser) using LFortran. Significant pre-GSoC progress has already been made: benchmark.f currently compiles to 76% and feq-parse to 40%. The remaining blockers include missing quadruple precision (REAL(KIND=16)) support, deserialization ICEs for forward-referenced symbol tables, ExternalSymbol resolution failures for struct-scoped types, ASR verifier false positives for GenericProcedure constructor calls, and an LLVM IR type mismatch in character length handling. The project will follow an iterative, compilation-driven workflow: attempt compilation, identify failures, reduce to MREs, fix the compiler, and validate against gfortran. Every fix will be accompanied by integration tests to prevent regressions. Deliverables: - Full compilation of both benchmark.f and feq-parse with LFortran - All example programs and test suites passing with gfortran-consistent output - End-to-end quadruple precision support across parsing, ASR, and LLVM backend - All fixes merged as pull requests with integration tests