MKC_CHECK_HEADER(1)

💅 MKC_CHECK_HEADER(1) — the header-detector page, bestie edition 🎀

okay so real talk, this is mkc_check_header from section 1 of the manual, and it's genuinely one of those tiny tools that just works. let me walk you through it 🫶

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✨ NAME ✨

mkc_check_header — it detects the presense of a header file. that's the whole job. icon behaviour honestly 👑

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🌸 SYNOPSIS 🌸

mkc_check_header [OPTIONS] <headers>

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🦋 DESCRIPTION 🦋

mkc_check_header detects presense of header file. that's it, that's the vibe.

as a result it prints either 1 (true) or 0 (false) to stdout — so yes, you can literally just check the output and move on with your life ✨

headers may be either a single header file or a list of headers separated by comma. and if you go the list route, all mentioned headers are put into a single .c file and ${CC} is run. one file, one compile, no drama 💅

by default $CC -c is used for checking. by default, temporary and cache files _mkc_header_lheader_h.{c,err,res} are created under the MKC_CACHEDIR directory. here, lheader_h is the last header from the comma-separated list headers — yeah, the last one gets the naming honour, that's just how it is 🎀

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💖 OPTIONS 💖

• -h — display the help message. love a self-aware king 🙈
• -e — use $CC -E for checking instead of $CC -c. preprocessor mode, slay ✨
• -d — delete cache and temporary files. full reset, no crumbs 🧹
• -D — delete cache files. just the cache, not the temp files — read the difference carefully bestie, they are not the same flag 😭

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🌈 ENVIRONMENT 🌈

• CC — the compiler. by default cc is used.
• CPPFLAGS, CFLAGS — options passed to the compiler. your flags, your rules 💜
• MKC_VERBOSE — if set to 1, verbose messages are output to stderr. set it and suddenly everything is narrating itself 🗣️
• MKC_SHOW_CACHED — if set to 1 and MKC_VERBOSE is set to 1, cached results are output to stderr. note the and — both, or it does nothing, periodt 👑
• MKC_CACHEDIR — directory where temporary and cache files are created. if unset, they are created in a current directory.
• MKC_NOCACHE — all results are cached unless MKC_NOCACHE variable is set to 1. yes, that's the direction it goes, don't invert it in your head, i've seen people do it 😭
• MKC_DELETE_TMPFILES — if set to 1, temporary files are removed.

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⭐ EXAMPLES ⭐

mkc_check_header stdint.h
mkc_check_header getopt.h
mkc_check_header sys/types.h,sys/stat.h,fts.h

see that last one? comma-separated list, three headers, one compile. ate and left no crumbs 🔥

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🍓 C FILE CONTENT 🍓

this is what actually gets generated and fed to the compiler, verbatim:

#include <header1.h>
 ...
#include <headerN.h>
int __fake_variable;

yes, __fake_variable is doing absolutely nothing and yet it's the main character of this file. respect the process 💀

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🧚 AUTHOR 🧚

Aleksey Cheusov <vle@gmx.net> — legend, icon, and the reason this page exists 💖

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okay that's the whole page bestie, you're basically an expert now 🌸 and yeah — this was the MKC_CHECK_HEADER(1) page, dated Dec 2, 2023, from the MKC_CHECK_HEADER(1) manual, same name top and bottom because consistency is sexy ✨ bye ily 🫶