Three GCC 16 gaps found by the redbear-full build.
-fhardened (seatd and other meson recipes, 24 errors)
-fhardened is a host-glibc hardening bundle x86_64-unknown-redox cannot
implement, but GCC accepts it on the command line, so meson's
cc.has_argument('-fhardened') probe answers YES and meson adds it to
every compile. GCC then refuses it for real:
cc1: error: '-fhardened' not supported for this target [-Werror]
Note the tag is [-Werror], not [-Werror=hardened] -- it is an
unconditional warning, so -Wno-hardened does not silence it (tried, and
it did not). The flag has to be cancelled instead; -fno-hardened does
that cleanly and the cookbook's flags are appended after the project's
own, so it wins. Nothing is weakened: the compiler is telling us the
option is inert on this target.
termcap (two independent defects, both latent until now)
1. Makefile.in hardcoded 'CFLAGS = -g' and has no @CFLAGS@ substitution
at all, so nothing configure resolved ever reached the compiler --
including the toolchain's default C dialect. termcap is pre-ANSI
code, so being compiled as GCC 16's default C23 failed at once with
'too many arguments to function malloc; expected 0, have 1'.
Substituting @CFLAGS@ is what a normal autotools Makefile.in does.
2. With CFLAGS flowing, the remaining errors were implicit declarations
of strlen/memcpy/exit/write, which GCC 14+ makes errors regardless of
-std. Cause: autoconf 2.70+ removed AC_HEADER_STDC, so STDC_HEADERS
is never defined and termcap.c/tparam.c took their pre-ANSI branch,
declaring 'char *malloc ();' instead of including <stdlib.h>.
Autoconf's guidance on dropping AC_HEADER_STDC is to assume those
headers exist, which holds for every target Red Bear builds.
pam-redbear
Cargo.lock missed by the earlier sweep; regenerated for the 0.3.2 fork
versions.
termcap and seatd now cook clean.
GCC 13.2.0 defaulted to gnu17 (__STDC_VERSION__ 201710L); GCC 16.1.0
defaults to gnu23 (202311L). The recipe tree is C17-era code, and C23
turns an empty parameter list from 'unspecified arguments' into 'no
arguments', which is a hard error against a real prototype.
Pin the cookbook's default C dialect to gnu17. This states the dialect
these sources were written against rather than suppressing a diagnostic,
and matches how the distributions handled the same GCC 14/15 transition.
Packages migrate to C23 as they are touched; the pin is dropped when the
tree is clean. A per-recipe -std= still wins, being appended after. C++
is deliberately NOT pinned -- kwin needs C++23, which is the entire point
of the GCC 16 upgrade.
Fix a real cookbook bug this exposed: CMAKE_CXX_FLAGS was built from
CFLAGS, so the C dialect flag reached the C++ compiler and g++ reported
"'-std=gnu17' is valid for C/ObjC but not for C++" on every file. The
meson path already keeps c_args/cpp_args apart; CMake now matches.
CPPFLAGS still reaches both, which is what carries the sysroot includes.
First opportunistic C23 fix: libiconv's lib/loop_wchar.h declared
'extern size_t mbrtowc ();', conflicting with relibc's four-argument
prototype. That declaration exists only for platforms whose <wchar.h>
does not declare mbrtowc -- per its own comment, BeOS, which lacks
mbstate_t and #defines it -- and the very next line already tests
'#ifdef mbstate_t'. Moving it inside that guard keeps it where it is
needed and drops it where a real prototype is in scope.
libiconv now cooks clean against GCC 16.1.0.
Un-defer xwayland in config/redbear-full.toml (it is a kwin build dependency).
Getting it to build required:
- cook_build script.rs: cookbook_configure now defeats autotools maintainer-mode
regeneration. Release tarballs ship a complete build system, but extraction
timestamp skew makes make re-run the version-pinned aclocal-<N>/automake-<N>
the tarball was generated with, which the host (a different automake) lacks
('aclocal-1.NN: command not found'). Force generated files newer than their
sources (staggered mtimes) and no-op ACLOCAL/AUTOMAKE/AUTOCONF/AUTOHEADER as a
safety net. This unblocked the whole X11 autotools stack (libxcb, libx11,
libxfont2, libxkbfile, ...) with no per-recipe edits.
- xwayland recipe: meson -> custom template so it can (1) overlay the host
wayland-scanner onto the sysroot path meson resolves (the sysroot scanner is a
Redox binary, unrunnable on the build host; it is a build-time-only generator
emitting arch-independent C), and (2) unset COOKBOOK_DYNAMIC so the cross
pkg-config resolves --static, pulling the X11 libs' Requires.private closure
(xcb -> xau) — those libs are static-only on Redox (libtool has no Redox
shared support), so the closure was otherwise dropped and the link failed on
XauGetBestAuthByAddr/XauDisposeAuth.
- os/access.c: include <sys/utsname.h> on __redox__ (Redox lacks SIOCGIFCONF so
the uname()-based DefineSelf is compiled; relibc provides uname/struct utsname).
Produces a proper Redox /usr/bin/Xwayland ELF.
- Add x11proto to redbear-full.toml package list
- libxau recipe updated with x11proto dependency and custom build script
- Fixes libxau build failure: 'Package xproto was not found'
Add redbear-usb-storage-check in-guest binary that validates USB mass
storage read and write I/O: discovers /scheme/disk/ devices, writes a
test pattern to sector 2048, reads it back, verifies match, restores
original content. Updates test-usb-storage-qemu.sh with write-proof
verification step.
Includes all accumulated Red Bear OS work: kernel patches, relibc
patches, driver infrastructure, DRM/GPU, KDE recipes, firmware,
validation tooling, build system hardening, and documentation.
Derivative of Redox OS (https://www.redox-os.org) adding:
- AMD GPU driver (amdgpu) via LinuxKPI compat layer
- ext4 filesystem support (ext4d scheme daemon)
- ACPI fixes for AMD bare metal (x2APIC, DMAR, IVRS, MCFG)
- Custom branding (hostname, os-release, boot identity)
Build system is full upstream Redox with RBOS overlay in local/.
Patches for kernel, base, and relibc are symlinked from local/patches/
and protected from make clean/distclean. Custom recipes live in
local/recipes/ with symlinks into the recipes/ search path.
Build: make all CONFIG_NAME=redbear-full
Sync: ./local/scripts/sync-upstream.sh
vasilito