Merge the serial same commands to reduce instructions and enhance performances.

• Reduce the serial + and - commands to one update instruction.
• Reduce the serial > and < commands to one move instruction.

Hello author:
when I use make command,it will be error.

user@user-Latitude-5430:~/brainfuck$ make
clang -c -I/usr/local/include  -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -o options.o options.c
clang -c -I/usr/local/include  -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -o engine.o engine.c
clang -c -I/usr/local/include  -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -o ast.o ast.c
/usr/bin/bison -d -o parser.c parser.y
/usr/bin/flex --header-file=scanner.h -o scanner.c scanner.l
clang -c -I/usr/local/include  -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -o parser.o parser.c
In file included from parser.y:3:
parser.y:12:3: error: unknown type name 'yytoken_kind_t'
  yytoken_kind_t token;
  ^
1 error generated.
make: *** [Makefile:35: parser.o] Error 1

Build AST.

Macro in Lisp is an amazing feature! It can be used for defining language syntax extensions, which is known as Domain Specific Languages (DSLs).

Try create a Clojure macro to embedded Brainfuck into Clojure.

It because the execution engine (JIT compiler) cannot find putchar and getchar.

Resources

• Brainfuck Wikipedia

Key Information

• Memory size: 30,000 bytes, and initialized to zero.
• Data pointer initialized to point to the leftmost byte of the array.
• Two streams of bytes for input and output.
• Eight commands:

Enhance the C version compiler to support JIT interpreter mode.

Function Requirement

• Support shebang mode like below:

#!/usr/bin/env brainfuck

++++++++++
[>+++++++>++++++++++>+++>+<<<<-]
>++.>+.+++++++..+++.>++.<<+++++++++++++++.
>.+++.------.--------.>+.>.

Tech Requirement

• Add new command # for single line comment.

Function Description

Usage: brainfuck [Options] <source-file>

Options:

• -c/--compile: Enable compile mode. Emit native object (.o).
• -p/--preprocess: Enable preprocess mode. Emit LLVM representation (.ll).
• -s/--script: [DEFAULT] Enable scripting mode. Parse and execute in memory.
• -o/--output <output-file>: Write output to file.
• -h/--help: Show this help and exit.

Tech requirement

• Parsing command line options with GNU getopt library.

• Strip dependencies on external files at runtime.

Emit LLVM representation (.ll)

Function Requirement

• Generate the executable file by link mode.

Tech Requirement

• Use system() function to invoke ld command to link the object files.

It would be cashed when link to executable file.

Build a simple Brainfuck interpreter in pure ANSI C, without any third-party dependencies.

Almost of LLVM tutorials are using C++, however, I'd like to use C language to build the lightweight compiler.
Fortunately, the LLVM provides the C interface as well!

Change the default behavior same with clang:

• Default to generate executable file.
• Remove the link mod option.

• Auto install musl-dev for runtime.

Disable extra command default, and let user to enable it.