gcc march compile options

gcc-opts.py

#!/usr/bin/python
import re
import subprocess


def get_supported_marches():
    #  gcc -c -Q -march=native --help=target
    res = subprocess.getoutput("gcc -c -Q -march=native --help=target")
    match = re.search(r" valid arguments for -march= option:\W*([^\r\n]+)", res, re.DOTALL)
    if match:
        return re.split(r"\s+", match.group(1), 0)
    else:
        return None


def get_opts(march):
    res = subprocess.getoutput(f"gcc -c -Q -march={march} --help=target")
    # res = subprocess.getoutput(f"gcc -march={march} -E -v - </dev/null 2>&1 | grep cc1")
    opts = {}
    match = re.search(" target specific:[\r\n]*(.*?)[\r\n] *Known ", res, re.DOTALL)
    excpt = ["-march=", "-masm=", "-mtune="]  # "-malign-functions=", "-malign-jumps=", "-malign-loops=",
    if match:
        for match in re.finditer(r"^\s+([\S]+)[ \t]*(\S*)$", match.group(1), re.MULTILINE):
            if (match.group(1) not in excpt):
                opts[match.group(1)] = match.group(2)
        return opts
    else:
        return None


def get_version():
    res = subprocess.getoutput("gcc -v 2>&1| grep \"gcc version\"")
    if len(res) < 10:
        raise Exception("gcc not found")
    else:
        return res


if __name__ == '__main__':
    ver = get_version()
    marches = get_supported_marches()
    # print(marches)
    all_opts = []
    all_march_opts = {}
    for march in marches:
        # print(march)
        mopts = get_opts(march)
        all_march_opts[march] = mopts
        # print(mopts)
        for (k, v) in mopts.items():
            if k not in all_opts:
                all_opts.append(k)

    print(
        "<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.slim.min.js'></script>"
        f"<b>{ver}</b>"
        """<input type="checkbox" id="tblhidesame"/><label for="tblhidesame">Hide Same</label><br>"""
        """<script>
    $('#tblhidesame').change(function () {
    var show = !$(this).is(":checked");
    var $table = $('.gcctbl');

    $table.find('thead td').each(function (index) {
        var vals = new Set();
        $table.find('tbody tr td:nth-child(' + index + ')').each(function () {
            vals.add($(this).text());
        });
        console.log($(this).text(), vals, vals.size > 1 || show)
        $table.find('tr td:nth-child(' + index + ')').each(function () {
            if (vals.size > 1 || show) 
                $(this).show(); 
            else
                $(this).hide();
        });
    });
    })
        </script>""")
    print(
        "<style>"
        ".gcctbl {padding:2px 4px; border-collapse:collapse; position: relative} "
        ".gcctbl td {border:1px solid gray; white-space: nowrap} "
        ".gcctbl thead td {font-weight:bold; text-align:center; white-space:nowrap; position: sticky; top: 0; background-color: rgba(200, 200, 200, 0.8);} "
        ".gcctbl .green {background-color:lime} "
        ".gcctbl .red {background-color:pink} "
        ".archname {text-align: right; font-weight:bold; position:sticky; left: 0; background-color: rgba(200, 200, 200, 0.8); } "
        ".valempty {background-color:gray;}"
        "</style>")
    print("<table class='gcctbl'><thead><tr><td>Arch</td>")
    for x in all_opts:
        print(f"<td>{x}</td>")
    print("</tr></thead>\n<tbody>")
    for (k, v) in all_march_opts.items():
        print(f"<tr><td class='archname'>{k}</td>")
        for opt in all_opts:
            val = "---"
            if (opt in v):
                val = v[opt]
                if val == "[enabled]":
                    print(f"<td class='green'>{v[opt]}</td>")
                elif val == "[disabled]":
                    print(f"<td class='red'>{v[opt]}</td>")
                else:
                    print("<td>" + v[opt] + "</td>")
            else:
                print("<td class='valempty'></td>")
        print("</tr>\n")
    print("</tbody></table>")