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README.md: add note surrounding POSIX compatibility

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Also specify the supported POSIX revision is POSIX.1-2017.
POSIX.1-2024 is soon to be published.
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Jeremy Baxter 2024-06-11 10:50:07 +12:00
parent a67c7d3eee
commit 9e6e82ecf5
1 changed files with 12 additions and 6 deletions
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README.md
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@ -21,10 +21,6 @@ First and foremost, Callisto tries to be:
and its standard library, and is easy to use for those who have no and its standard library, and is easy to use for those who have no
prior experience with C prior experience with C
Callisto relies on APIs specified in the POSIX specification;
therefore it cannot be used on operating systems that are not
POSIX-compliant (like Microsoft Windows).
## portability ## portability
To build Callisto, all you need is a C99 compiler. The configure To build Callisto, all you need is a C99 compiler. The configure
@ -37,11 +33,21 @@ configure script before you build. The compiler must support gcc-like
command line arguments. command line arguments.
Callisto has zero runtime dependencies, unless you built it with Callisto has zero runtime dependencies, unless you built it with
support for GNU libreadline*. Lua 5.4 is statically linked in. This support for GNU libreadline [1]. Lua 5.4 is statically linked in. This
means that the same binary will work across different Linux means that the same binary will work across different Linux
distributions. distributions.
*libreadline support can be enabled at build time, but is disabled by Callisto relies on APIs standardized by POSIX.1-2017; therefore it
cannot be used on operating systems that do not comply with this
specification (like Microsoft Windows).
Theoretically Callisto should work on all operating systems
implementing POSIX. It has been tested on Linux and OpenBSD; but if
you find Callisto unable to build on your platform, please let me
know. Send an email to jeremy@baxters.nz or file a ticket by emailing
~jeremy/callisto@todo.sr.ht.
[1]: libreadline support can be enabled at build time, but is disabled by
default. To force building with libreadline support, pass the default. To force building with libreadline support, pass the
`-wreadline` flag to the configure script. `-wreadline` flag to the configure script.