sys-devel/gcc: add 16.0.0_p20260104

Closes: https://bugs.gentoo.org/968182
Signed-off-by: Sam James <sam@gentoo.org>

sys-devel/gcc/Manifest

@@ -50,12 +50,14 @@ DIST gcc-16-20251207.tar.xz 97572092 BLAKE2B 373c76b915ade3be8b78a16d5d77b549ea5
 DIST gcc-16-20251214.tar.xz 97640212 BLAKE2B dbada367a57b73f089f07952ab813580024b81806ceec2895656d592afd7fed258d7ef33a16baab5731138becf466a19d3b6ab5ff0b28d99b912abbb61ccf79b SHA512 4d2d5a97f3193d8092afec4937ca2c03de706eb60c2a7e7eaef5260eba2f3f524787741c1b1a94ca919e571b4144d4e88affff5864539a251bad3f3f214d86a7
 DIST gcc-16-20251221.tar.xz 97719712 BLAKE2B 823a0950b089501e1bd9d89910320a685790aa5623498d860dbc367c18eade21dbe887671a911d976e6a3860025eedccc870e5ba370f3967456b0a9cba535b2b SHA512 5f3f88bddfc8cef6d368fcbd2b2a858c76b38ebd20ad15e0040925d56c0f8118232a3cc44744818f27f7ffbb1536c2cdd47bed7ba1639c5776508740a2bd3241
 DIST gcc-16-20251228.tar.xz 97763020 BLAKE2B ef6d042247b40dd77e28c3b96d8a3df21e92af32eb00327e54c4410099de7a6d7318970f9b8bdbea7aa505c4b82b284bf30e8534015d302cecd393bd300055e8 SHA512 f8107296db1bdc2d59655cca0641236b7cc9eab710a4e6801b6d66777f81c035219b9ee2504c91a7724cf5948dfb3a347778c0b04d8f842c9b4d0a129c940dab
+DIST gcc-16-20260104.tar.xz 97818844 BLAKE2B d6f6ea976e5a43c1ccf71a75142b5f8dbe753f6e57ce0ff0bc65934e07a994022fb4dc2ebe8880b33e06ee3f1524e5213905f2d3b2785d16ff28bb192f0713d7 SHA512 8b4c666cef4be7315f16bafdca381f69d03fe78b17bb2bbaf99027a67c208f2e0861839a0c776f6b98c1f6f69e41e78fb8388ec50ca1e7bf77fd959f37abf6f0
 DIST gcc-16.0.0-musl-patches-1.tar.xz 3040 BLAKE2B 18b16357699780eb470cf44a10710281955140103198e0bd55b75e1efe3dbec233689edb11e1b9a62f782f3d97293af4906c18c2c41613b422eda085ee819467 SHA512 5ba580c7c7bb9e62935a5162d44d357cc31185a113acff7498ed7b1ac43fd0a35de7c3de0c87f02fe0be46b5e55b49bb35d1f5cd470058d21a9ea4096a37e13d
 DIST gcc-16.0.0-patches-24.tar.xz 20584 BLAKE2B e94a74b867317f5f5a126231783b5c15be729ec3f20863d46ed97f2eace67718d3a3a7f1cf6d040453057e764af4e4a2aeaeae7f6a09a5d966dd9df22716db4b SHA512 750fbade44cafddd7d54a942413193732649486fc83055a90049b461cbae96f6924fa38e1489c2dbf49d082f59fc6932658a563ee5a167fe1bba9f6bb7f23bed
 DIST gcc-16.0.0-patches-25.tar.xz 17940 BLAKE2B 140856458acac807c2a78d97e0f10cc4d0012ad913a1d61411dd9f01ccc6e355fce219a1a0de1cae2cb4fc57b84fdc429ea65932964230b0f4852d6e61a62ee6 SHA512 2272aed3ab6d06c9f611adb01f5bbcd8c7eb4531aee41d456a3224a3b0b388f7bd9c541e4d5d8850e48450ae871074195d03ed83dc30292f2db5be9b4a7cdfb7
 DIST gcc-16.0.0-patches-26.tar.xz 23932 BLAKE2B 6528e4a9f2c02a00bab35c13fe53b071ff99001658de4e17806d66a87893cc528165682b841928f00dd075240a48a3603e0027a6fa8c567aefdf05f89bd2f13d SHA512 88bb06c83aa9bcff20d13e4e9de56cbf8a8de2acb73d918656eeff172a6302aa6371635ac5f8048083ccbb78965b273aa85e9372d4ae2c3df1023c604dcdbaeb
 DIST gcc-16.0.0-patches-27.tar.xz 24392 BLAKE2B 08142bdcc50703d127a0ef2a87152ff27d259c588b1ea632357a7a2af634e7f0d54c190134574bd9395a6ca2b522e523fc2cc33e68733230fbfe7f94aae8edea SHA512 7a620bb61b96326fee118945e2f3d8d43878c7cc49007f83ca8e1f456bfea688223fca6af4a9a560d05b881f388d5a218cc3faad9dc4a60e6d113881c114346e
 DIST gcc-16.0.0-patches-28.tar.xz 25820 BLAKE2B f7ff876b6b5081a72c0e004bbc2fa94c50daf6433f7a6962d3d5781b0faed3db105a6a24d8d84417347b1a43b828f6a9cbad0b4c3fc11b291797c68877692ea0 SHA512 66179b65f6f54bec508c8e0527cb6e86a2183c0a8acf5f74572beba4ce4e19dd2cf2bb342127a4cfafd465779257b9e6e79d17323b6814855a7f8814dcd935c9
+DIST gcc-16.0.0-patches-29.tar.xz 26752 BLAKE2B cb43d218f9429b38794a130fa787961485721136ae14898d105041db1ee17c4a3297b5e8a8ed9bb7b464dead352eca7cd11906ad3b4a829178eba0172e49d280 SHA512 d27cb569bed0bd8d3867b1cb1d90c4191a995fe8509d3317f036b9c403a5ed82f179f6c83d25cf56308709cb78e8045a53c7ca93a0402c13511ac70807aa5e8b
 DIST gcc-8.5.0-patches-5.tar.xz 20188 BLAKE2B 45b29161105edc6344bb48f5bdf17e1aad6e8d9edb4d9434816425996c1b12c10f1303963776adad9db866d845f864d80d198a30e35ee6c204ca3659cf7a1401 SHA512 f22ab5d8e3116e2e896a5dcbbf5cef67dc5090182af364ef64fc22d2b28c029da5ed39f126f446721e388e7b6848239d01f5fc0346e49b96d5c04068b557f8f8
 DIST gcc-8.5.0.tar.xz 63841008 BLAKE2B aa81a1a730fd7371360f6abed6ba78b5843fd18c58d5de5687acc320741b9e430e85df3535a1ef7a26051409be8d2f0945f503e5968480d919103123a99d4b12 SHA512 92f599680e6b7fbce88bcdda810f468777d541e5fddfbb287f7977d51093de2a5178bd0e6a08dfe37090ea10a0508a43ccd00220041abbbec33f1179bfc174d8
 DIST gcc-9.5.0-patches-3.tar.xz 17888 BLAKE2B f2be05f32f4ecca41ebf4f402bf8fb3c11a36a8b7bd912ee9fe6baea980929774b629e12df7afb3405f1f5d044766a437b3eca5433f4af6c757f4a9dbb2e77eb SHA512 d31bb1964cdb2376572e4981b22c7ffa6fa695259c27af5d0d12aebc334cd1122c2f75739033f25f1e672300adeab2b3772622cb16099d002f3f8c5a8fe694f9

sys-devel/gcc/gcc-16.0.0_p20260104.ebuild

@@ -0,0 +1,56 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# Maintenance notes and explanations of GCC handling are on the wiki:
+# https://wiki.gentoo.org/wiki/Project:Toolchain/sys-devel/gcc
+
+TOOLCHAIN_PATCH_DEV="sam"
+TOOLCHAIN_HAS_TESTS=1
+PATCH_GCC_VER="16.0.0"
+PATCH_VER="29"
+MUSL_VER="1"
+MUSL_GCC_VER="16.0.0"
+PYTHON_COMPAT=( python3_{11..14} )
+
+if [[ -n ${TOOLCHAIN_GCC_RC} ]] ; then
+	# Cheesy hack for RCs
+	MY_PV=$(ver_cut 1).$((($(ver_cut 2) + 1))).$((($(ver_cut 3) - 1)))-RC-$(ver_cut 5)
+	MY_P=${PN}-${MY_PV}
+	GCC_TARBALL_SRC_URI="mirror://gcc/snapshots/${MY_PV}/${MY_P}.tar.xz"
+	TOOLCHAIN_SET_S=no
+	S="${WORKDIR}"/${MY_P}
+fi
+
+inherit toolchain
+
+if tc_is_live ; then
+	# Needs to be after inherit (for now?), bug #830908
+	EGIT_BRANCH=master
+elif [[ -z ${TOOLCHAIN_USE_GIT_PATCHES} ]] ; then
+	# Don't keyword live ebuilds
+	#KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+	:;
+fi
+
+if [[ ${CATEGORY} != cross-* ]] ; then
+	# Technically only if USE=hardened *too* right now, but no point in complicating it further.
+	# If GCC is enabling CET by default, we need glibc to be built with support for it.
+	# bug #830454
+	RDEPEND="elibc_glibc? ( sys-libs/glibc[cet(-)?] )"
+	DEPEND="${RDEPEND}"
+fi
+
+src_prepare() {
+	local p upstreamed_patches=(
+		# add them here
+	)
+	for p in "${upstreamed_patches[@]}"; do
+		rm -v "${WORKDIR}/patch/${p}" || die
+	done
+
+	toolchain_src_prepare
+	eapply "${FILESDIR}"/${PN}-13-fix-cross-fixincludes.patch
+	eapply_user
+}