LLVM-CXXFILT(1)

💖 LLVM-CXXFILT(1) 💖

okay bestie, gather round, because we're about to talk about llvm-cxxfilt — that's the LLVM symbol name demangler, section 1 of the manual, and honestly? she's iconic. 🎀

---

✨ NAME ✨

llvm-cxxfilt — the LLVM symbol name demangler. yeah. that's her whole job. and she eats every time. 💅

---

🌸 SYNOPSIS 🌸

llvm-cxxfilt [options] [mangled names...]

---

🦋 DESCRIPTION 🦋

so llvm-cxxfilt is a symbol demangler, and the whole vibe is that you can use her as a drop-in replacement for the GNU c++filt tool. she takes a bunch of symbol names and prints their demangled form over on the standard output stream. that's it. that's the gig. 👑

and listen — if a name can't be demangled? she does not panic, she does not throw hands, she simply prints it as-is. no drama, just vibes. ✨

now, if you don't hand her any names on the command line, she'll read names interactively from the standard input stream instead. 🫶 and here's the lil detail that matters: when she's reading from standard input, every input line gets split on characters that are not part of valid Itanium name manglings — meaning characters that aren't alphanumeric, '.', '$', or '_'. and those separators between names? she copies them straight to the output as-is. cute, right? 💖

---

🍓 EXAMPLE 🍓

watch her work, no cap:

$ llvm-cxxfilt _Z3foov _Z3bari not_mangled
foo()
bar(int)
not_mangled
$ cat input.txt
| _Z3foov *** _Z3bari *** not_mangled |
$ llvm-cxxfilt < input.txt
| foo() *** bar(int) *** not_mangled |

see how not_mangled just walked in and stayed exactly as it was? she's so respectful. 😌 and those *** separators? untouched. preserved. main character energy. ✨

---

💅 OPTIONS 💅

here we go bestie, the whole lineup, no skips:

• --format=<value>, -s — which mangling scheme to assume. valid values are auto (that's the default, and it auto-detects the style) and gnu (assume GNU/Itanium style). pick your fighter. 🥊
• --help, -h — prints a summary of the command line options. she's helpful like that. 🫶
• --no-params, -p — do not demangle function parameters or return types. just the name, thanks. 🙅
• --no-strip-underscore, -n — do not strip a leading underscore. heads up: this is the default for all platforms. ⭐
• --quote — adds " " around demangled names. and no, she won't double-quote names that are already quoted. she has taste. 🎀
• --strip-underscore, -_ — strips a single leading underscore, if one's there, from each input name before demangling. bye underscore 👋
• --types, -t — attempts to demangle names as type names as well as symbol names. she contains multitudes. 🌈
• --version — displays the version of the llvm-cxxfilt executable. ✨
• @<FILE> — reads command-line options from the response file <FILE>. yes, @ and all. 💜

---

🔥 EXIT STATUS 🔥

llvm-cxxfilt returns 0 unless she runs into a usage error, and in that case a non-zero exit code comes back. so like, 0 = she's happy, not 0 = you did something and she's telling you about it. 😭

---

👑 SEE ALSO 👑

• llvm-nm(1) <llvm-nm.html>

---

🌟 Author 🌟

Maintained by the LLVM Team (https://llvm.org/). they keep her thriving, fr fr. 🫶

---

🎀 Copyright 🎀

2003-2026, LLVM Project

---

and that's the whole page, bestie!! LLVM version 22, dated 2026-07-16 — so when you're out here demangling symbols, just know you're doing it with the freshest, most iconic tool in the game. slay, go demangle something, periodt. 💖✨🦋🌸💅