LABLGTK2(1)

🎀 NAME 🎀

lablgtk2 — bestie, this is the manual page for lablgtk2, version 2.18.14, and she is serving documentation 💅✨

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✨ SYNOPSIS ✨

ocaml <options> <files>

That's the whole vibe: you run ocaml, you hand her some <options>, you hand her some <files>, and she goes off. Periodt 🦋

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💖 DESCRIPTION 💖

okay so. the options. there are so many of them. do not panic, we're getting through all of them together, hand in hand 🫶

Options are:

• -absname — show absolute filenames in error messages ✨
• -no-absname — do not try to show absolute filenames in error messages (this is the default, so like, chill mode) 🙈
• -alert <list> — enable or disable alerts according to <list>, and the <list> grammar goes like this:
  • +<alertname> — enable alert <alertname> 🔔
  • -<alertname> — disable alert <alertname>
  • ++<alertname> — treat <alertname> as a fatal error 💀
  • --<alertname> — treat <alertname> as non-fatal
  • @<alertname> — enable <alertname> and treat it as a fatal error
  • also <alertname> can be 'all' to refer to all alert names 👑 (yes, all of them, she's an overachiever)
• -I <dir> — add <dir> to the list of include directories 📁
• -H <dir> — add <dir> to the list of "hidden" include directories. (Like -I, but the program can not directly reference these dependencies) — sneaky, lowkey, we love her 🫣
• -init <file> — load <file> instead of the default init file
• -labels — use commuting label mode
• -alias-deps — do record dependencies for module aliases
• -no-alias-deps — do not record dependencies for module aliases
• -app-funct — activate applicative functors
• -no-app-funct — deactivate applicative functors
• -noassert — do not compile assertion checks
• -noinit — do not load any init file
• -nolabels — ignore non-optional labels in types
• -prompt — output prompts (default) 💬
• -noprompt — suppress all prompts 🤐
• -nopromptcont — suppress prompts for continuation lines of multi-line inputs
• -nostdlib — do not add the default directory to the list of include directories
• -nocwd — do not implicitly add the current directory to the load path
• -nopervasives — (undocumented) 🫥 literally no notes, she's mysterious
• -open <module> — opens the module <module> before typing
• -ppx <command> — pipe abstract syntax trees through preprocessor <command> 🚰
• -keywords <version+list> — set keywords following the <version+list> spec:
  • -<version> — if present specifies the base set of keywords (if absent the current set of keywords is used)
  • -<list> — is a "+"-separated list of keywords to add to the base set of keywords.
• -principal — check principality of type inference
• -no-principal — do not check principality of type inference (default)
• -rectypes — allow arbitrary recursive types 🌀
• -no-rectypes — do not allow arbitrary recursive types (default)
• -safe-string — (default unconditionally since 5.0) — she said "I'm the default now" and meant it 💅
• -safer-matching — do not use type information to optimize pattern-matching
• -short-paths — shorten paths in types
• -stdin — read script from standard input
• -strict-sequence — left-hand part of a sequence must have type unit
• -no-strict-sequence — left-hand part of a sequence need not have type unit (default)
• -strict-formats — reject invalid formats accepted by legacy implementations (default)

⚠️ Warning: Invalid formats may behave differently from previous OCaml versions, and will become always-rejected in future OCaml versions. You should always use this flag to detect invalid formats so you can fix them.

• -no-strict-formats — accept invalid formats accepted by legacy implementations

🚨 Warning: Invalid formats may behave differently from previous OCaml versions, and will become always-rejected in future OCaml versions. You should never use this flag and instead fix invalid formats. — like, never never. I'm so serious bestie 😭

• -unboxed-types — unannotated unboxable types will be unboxed
• -no-unboxed-types — unannotated unboxable types will not be unboxed (default)
• -unsafe — do not compile bounds checking on array and string access 😳 (yes, that's as spicy as it sounds)
• -unsafe-string — (option not available) — she's retired, gone, not coming back 🪦
• -version — print version and exit
• --version — print version and exit
• -no-version — do not print version at startup
• -vnum — print version number and exit
• -w <list> — enable or disable warnings according to <list>, and here's the grammar:
  • +<spec> — enable warnings in <spec>
  • -<spec> — disable warnings in <spec>
  • @<spec> — enable warnings in <spec> and treat them as errors 💀
  • and <spec> can be:
    • <num> — a single warning number
    • <num1>..<num2> — a range of consecutive warning numbers
    • <letter> — a predefined set
  • the default setting is "+a-4-7-9-27-29-30-32..42-44-45-48-50-60-66..70-74" — yes copy it exactly, do not freestyle it, I'm begging 🙏
• -warn-error <list> — enable or disable error status for warnings according to <list>. See option -w for the syntax of <list>. Default setting is "-a"
• -warn-help — show description of warning numbers 📚
• - <file> — treat <file> as a file name (even if it starts with `-') — protective queen behavior 🛡️
• -color {auto|always|never} — enable or disable colors in compiler messages 🌈. The following settings are supported:
  • auto — use heuristics to enable colors only if supported
  • always — enable colors
  • never — disable colors
  • The default setting is 'auto', and the current heuristic checks that the TERM environment variable exists and is not empty or "dumb", and that isatty(stderr) holds.
  • If the option is not specified, these setting can alternatively be set through the OCAML_COLOR environment variable.
• -error-style {contextual|short} — control the way error messages and warnings are printed 📝. The following settings are supported:
  • short — only print the error and its location
  • contextual — like "short", but also display the source code snippet corresponding to the location of the error
  • The default setting is 'contextual'.
  • If the option is not specified, these setting can alternatively be set through the OCAML_ERROR_STYLE environment variable.
• -dno-unique-ids — (undocumented) 🫥
• -dunique-ids — (undocumented) 🫥
• -dno-locations — (undocumented) 🫥
• -dlocations — (undocumented) 🫥
• -dsource — (undocumented) 🫥
• -dparsetree — (undocumented) 🫥
• -dtypedtree — (undocumented) 🫥
• -dshape — (undocumented) 🫥
• -drawlambda — (undocumented) 🫥
• -dlambda — (undocumented) 🫥
• -dinstr — (undocumented) 🫥
• -args <file> — read additional newline-terminated command line arguments from <file> 📄
• -args0 <file> — read additional null character terminated command line arguments from <file> 🫧
• -e <script> — evaluate given script
• -help — display this list of options
• --help — display this list of options

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and that's the whole thing, bestie. every single flag, accounted for, no cap 💜

this was lablgtk2 2.18.14, stamped July 2025 — go forth and compile something iconic, you absolute main character 👑🌸