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docs: Update toolchain requirement to C11

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We have required C99 for a while; in the meantime, most C toolchains
have moved on to C11 as the default C standard.
This commit is contained in:
Emmanuele Bassi 2023-09-11 11:20:53 +01:00
parent 4d2e0df9ee
commit c4e9fb9536
1 changed files with 5 additions and 7 deletions
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docs/toolchain-requirements.md
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@ -1,14 +1,14 @@
Toolchain/Compiler requirements Toolchain/Compiler requirements
=== ===
GLib requires a toolchain that supports C99. GLib requires a toolchain that supports C11.
GLib contains some fall back code that allows supporting toolchains that are not GLib contains some fall back code that allows supporting toolchains that are not
fully C99-compatible. fully C11-compatible.
GLib makes some assumptions about features of the C library and C preprocessor, GLib makes some assumptions about features of the C library and C preprocessor,
compiler and linker that may go beyond what C99 mandates. We will use features compiler and linker that may go beyond what C99 mandates. We will use features
beyond C99 if they are substantially useful and if they are supported in a wide beyond C11 if they are substantially useful and if they are supported in a wide
range of compilers. range of compilers.
In general, we are primarily interested in supporting these four compilers: In general, we are primarily interested in supporting these four compilers:
@ -116,11 +116,10 @@ _Hard requirement._
Your compiler must support `alloca()`, defined in `<alloca.h>` (or `<malloc.h>` Your compiler must support `alloca()`, defined in `<alloca.h>` (or `<malloc.h>`
on Windows) and it must accept a non-constant argument. on Windows) and it must accept a non-constant argument.
(C11) support for type redefinition C11 support for type redefinition
--- ---
**This requirement has been temporarily suspended (on account of OpenBSD _Hard requirement._
carrying an old version of gcc) but it will probably return in the future.**
Your compiler must allow “a typedef name [to] be redefined to denote the same Your compiler must allow “a typedef name [to] be redefined to denote the same
type as it currently does”, as per C11 §6.7, item 3. type as it currently does”, as per C11 §6.7, item 3.
@ -193,4 +192,3 @@ GLib [requires a C99 `stdint.h`](https://gitlab.gnome.org/GNOME/glib/-/merge_req
with all the usual sized integer types (`int8_t`, `uint64_t` and so on), with all the usual sized integer types (`int8_t`, `uint64_t` and so on),
believed to be supported by all relevant Unix platforms/compilers, as well as believed to be supported by all relevant Unix platforms/compilers, as well as
Microsoft compilers since MSVC 2013. Microsoft compilers since MSVC 2013.