qlibs - C library and headers based on "djb's libs" and libowfat

Initially, these libs were excluded from *qmail and forseen to use with eQmail. As the packages of djb (D.J. Bernstein) uses these libs in different versions, there comes up the need to have a consistent state.

As time was going on, there was also a need to include additional functionality and up-to-date best practices.

Short - this was the point where some parts from libowfat were included.

The current fehQlibs rather accustom to the needs of different OS.

In theorie - these libs can be used with any djb software.

Achievements

IPv4/IPv6 unification: The current package supports unified IPv4/IPv6 socket calls, while IPv6 is the default.
DNS stub-resolver: The provided DNS stub-resolver is IPv4 and IPv6 aware. See the README in the ./dnsstub directory for details.

Installation

Check the INSTALL.md document.

Packaging

The fehQlibs are incompatible with Gentoo's parallel compilation flag '-jN' for N > 1.

Compatibility

Starting with version fehQlibs-15b, GCC 10 and Clang compatibility is provided, which means ISO C conformance.
Since fehQlibs-17 strong coupling of application routines previously introduced by the global (external) 'ipv4socket' variable are avoided.
stralloc.h is decoupled from genalloc.h (to be included separately). This respects the GCC 10 compilation unit behavior.
fehQlibs-25 provide compatibility with GCC 14 and Clang 18. Under the hood, the prototypes include now the correct types of arguments (signatures) required for function pointers.
- Some warning still exits; some are silly, others need to be tackled in forthcoming releases.
- This depends however on the development of the 'C' standard and the respective 'C' compilers.
fehQlibs-28 are C23 (and thus GCC 15.2) compliant.
- _GENERICS for some scan_X and fmt_x routines have been added. See man scan.3/fmt.3.
All warnings resolved in fehQlibs-29 (for GCC 15.2) except for one (trivial).

Updated: 20170329, Kai Peter

Updated: 20251214, Erwin Hoffmann