gnu_tools: gnu tools( GCC / Binutils )

1.　　GCC:　　https://gcc.gnu.org/onlinedocs/

　　1.1.　　CPP: The C Preprocessor(MACRO):　　https://gcc.gnu.org/onlinedocs/gcc-12.2.0/cpp/

　　1.2.　　The GNU C++ Library:　　https://gcc.gnu.org/onlinedocs/gcc-12.2.0/libstdc++/manual/

　　1.3.　　Standard C++ Library Reference Manual(libstdc++ Source Documentation):　　https://gcc.gnu.org/onlinedocs/gcc-12.2.0/libstdc++/api/

2.　　GNU Binutils：　　http://sourceware.org/binutils/

main tools:


    1.        ld - the GNU linker.
    
    2.        as - the GNU assembler.
    
    3.        gold - a new, faster, ELF only linker.

    
others tools:


    4.        addr2line - Converts addresses into filenames and line numbers.
    
    5.        ar - A utility for creating, modifying and extracting from archives.
            
    6.        c++filt - Filter to demangle encoded C++ symbols.
    
    7.        dlltool - Creates files for building and using DLLs.
    
    8.        elfedit - Allows alteration of ELF format files.
    
    9.        gprof - Displays profiling information.
    
    10.        gprofng - Collects and displays application performance data.
    
    11.        nlmconv - Converts object code into an NLM.
    
    12.        nm - Lists symbols from object files.
    
    13.        objcopy - Copies and translates object files.
    
    14.        objdump - Displays information from object files.
    
    15.        ranlib - Generates an index to the contents of an archive.
    
    16.        readelf - Displays information from any ELF format object file.
    
    17.        size - Lists the section sizes of an object or archive file.
    
    18.        strings - Lists printable strings from files.
    
    19.        strip - Discards symbols.
    
    20.        windmc - A Windows compatible message compiler.
    
    21.        windres - A compiler for Windows resource files.