update according to code review suggestion

Author: Vipul-Cariappa

src/bin/lpython.cpp

@@ -1935,7 +1935,6 @@ int main(int argc, char *argv[])
         compiler_options.use_colors = !arg_no_color;
         compiler_options.indent = !arg_no_indent;
 
-
         // if (fmt) {
         //     return format(arg_fmt_file, arg_fmt_inplace, !arg_fmt_no_color,
         //         arg_fmt_indent, arg_fmt_indent_unit, compiler_options);
@@ -1982,12 +1981,17 @@ int main(int argc, char *argv[])
         }
 
         if (arg_files.size() == 0) {
+#ifdef HAVE_LFORTRAN_LLVM
             lpython_pass_manager.parse_pass_arg(arg_pass, skip_pass);
             lpython_pass_manager.use_default_passes();
             compiler_options.po.disable_main = true;
             compiler_options.emit_debug_line_column = false;
             compiler_options.generate_object_code = false;
             return interactive_python_repl(lpython_pass_manager, compiler_options, arg_v);
+#else
+            std::cerr << "Interactive prompt requires the LLVM backend to be enabled. Recompile with `WITH_LLVM=yes`." << std::endl;
+            return 1;
+#endif
         }
 
         // TODO: for now we ignore the other filenames, only handle

src/lpython/python_evaluator.cpp

@@ -1,15 +1,16 @@
-#include "libasr/asr_scopes.h"
-#include "lpython/python_ast.h"
 #include <iostream>
+#include <fstream>
+#include <string>
 
 #include <lpython/python_evaluator.h>
 #include <lpython/semantics/python_ast_to_asr.h>
+#include <lpython/python_ast.h>
+#include <lpython/pickle.h>
+#include <lpython/parser/parser.h>
 #include <libasr/codegen/asr_to_cpp.h>
 #include <libasr/exception.h>
 #include <libasr/asr.h>
-#include <lpython/pickle.h>
-#include <lpython/parser/parser.h>
-#include <string>
+#include <libasr/asr_scopes.h>
 
 #ifdef HAVE_LFORTRAN_LLVM
 #include <libasr/codegen/evaluator.h>
@@ -31,8 +32,8 @@ PythonCompiler::PythonCompiler(CompilerOptions compiler_options)
     al{1024*1024},
 #ifdef HAVE_LFORTRAN_LLVM
     e{std::make_unique<LLVMEvaluator>()},
-    eval_count{1},
 #endif
+    eval_count{1},
     compiler_options{compiler_options},
     symbol_table{nullptr}
 {

src/lpython/python_evaluator.h

@@ -71,8 +71,8 @@ class PythonCompiler
     Allocator al;
 #ifdef HAVE_LFORTRAN_LLVM
     std::unique_ptr<LLVMEvaluator> e;
-    size_t eval_count;
 #endif
+    int eval_count;
     CompilerOptions compiler_options;
     SymbolTable *symbol_table;
     std::string run_fn;