Make Option -o work

.gitignore

@@ -74,6 +74,7 @@ src/libasr/config.h
 share/jupyter/kernels/fortran/kernel.json
 src/runtime/*.o.empty.c
 python_ast.py
+python_ast.h
 ser.txt
 
 ### https://raw.github.com/github/gitignore/218a941be92679ce67d0484547e3e142b2f5f6f0/Global/macOS.gitignore

build0.sh

@@ -11,7 +11,7 @@ python grammar/asdl_cpp.py
 # Generate a Python AST from Python.asdl (Python)
 python grammar/asdl_py.py
 # Generate a Python AST from Python.asdl (C++)
-python grammar/asdl_cpp.py grammar/Python.asdl src/lfortran/ast.h
+python grammar/asdl_cpp.py grammar/Python.asdl src/lfortran/python_ast.h
 # Generate a Fortran ASR from ASR.asdl (C++)
 python grammar/asdl_cpp.py grammar/ASR.asdl src/libasr/asr.h
 

ci/build.xsh

@@ -83,7 +83,7 @@ cp lpython-$lpython_version/test-bld/src/runtime/*.mod src/runtime/
 # Run some simple compilation tests, works everywhere:
 src/bin/lpython --version
 # Compile and link separately
-src/bin/lpython -c examples/expr2.f90 -o expr2.o
+src/bin/lpython -c examples/expr2.py -o expr2.o
 src/bin/lpython -o expr2 expr2.o
 ./expr2
 

src/bin/lfortran.cpp

@@ -1507,11 +1507,11 @@ int main(int argc, char *argv[])
                 LFORTRAN_ASSERT(false);
             }
         }
+
         if (arg_c) {
             if (backend == Backend::llvm) {
 #ifdef HAVE_LFORTRAN_LLVM
-                return compile_to_object_file(arg_file, outfile, false,
-                    compiler_options);
+                return compile_python_to_object_file(arg_file, outfile, compiler_options);
 #else
                 std::cerr << "The -c option requires the LLVM backend to be enabled. Recompile with `WITH_LLVM=yes`." << std::endl;
                 return 1;
@@ -1537,10 +1537,15 @@ int main(int argc, char *argv[])
                 std::cerr << "Compiling Python files to object files requires the LLVM backend to be enabled. Recompile with `WITH_LLVM=yes`." << std::endl;
                 return 1;
 #endif
+            } else {
+                throw LFortran::LFortranException("Unsupported backend.");
             }
             if (err) return err;
             return link_executable({tmp_o}, outfile, runtime_library_dir,
                     backend, static_link, true, compiler_options);
+        } else {
+            return link_executable(arg_files, outfile, runtime_library_dir,
+                    backend, static_link, true, compiler_options);
         }
     } catch(const LFortran::LFortranException &e) {
         std::cerr << "Internal Compiler Error: Unhandled exception" << std::endl;