sys-devel/gcc: add 15.0.0_pre20241103

Closes: https://bugs.gentoo.org/942593
Closes: https://bugs.gentoo.org/942440
Closes: https://bugs.gentoo.org/942153
Signed-off-by: Sam James <sam@gentoo.org>

sys-devel/gcc/Manifest

@@ -21,6 +21,7 @@ DIST gcc-14-20241102.tar.xz 88166448 BLAKE2B 1b56e6cc06d1163ca830d1aad307fce7ba8
 DIST gcc-14.1.0-musl-patches-1.tar.xz 3600 BLAKE2B 4cd920b7ca1f122cae806707564d8e45bfd48e78c88788a12a301f6068b5a5f335d8885e67479ac536c66aeaa81f2ecb7240ae56e9fc821a7246ab66b453711f SHA512 61c48d90a55dfc2129d96aee69d939d6a89f6407f69f7bd12c1a619f28989f471fd219d731958f8e62b0fd650c32300f0ad8dc06d5df23d9fc8c1a77fe210c25
 DIST gcc-14.2.0-patches-3.tar.xz 13920 BLAKE2B 5b3efa54671581d97ae664e73629f247c776d84eea0b10f8d3223502582f1d1086fff86a6cde6c35b6b43d134af4dad3135d3de5531cfccb320a7fc884ab39ef SHA512 d47549e902055414142f650c7098f029410549741542553b1d0c0519f046a958561f92552e44f59663a7645d42316af5dab1462f54f50f2205257be6744c2fce
 DIST gcc-15-20241027.tar.xz 89784028 BLAKE2B 75f48fac50a19443289e36bee119b1535ca842f0300597ad1f6fbccbe2754cb5b4444f263c7fc3a3ca699fa0179606849c1852849c48faf875082a1dc08ee183 SHA512 7248f040a980062167d5d7518bf212a5d9cd78a3f9aec8d4983dc3d2d2735affcac4d1eff5c38081ec10c7119d85ba3f7dd39327225b1de8b7a95a13268c60ee
+DIST gcc-15-20241103.tar.xz 89813036 BLAKE2B 4fd6cd5d8d19f6545ebe1a193fc4464eba0d114126db8e282ed92196e71f84eb2974133a2dd93ab78c8d3f2370e52d4646eefc27bd5962c6e242c8776ec06b64 SHA512 cffb953576efe3ee2afaa11bdde403bb038da4ff4114f19bcc931540546a4f2bfa7148f9f6c989b40814393faecb1bfb0cdac475372bb6ef8de3924fed984c74
 DIST gcc-15.0.0-musl-patches-2.tar.xz 3076 BLAKE2B 0073248fe4f7dd827980559017b5aa1fb5c4c46acc9ad5c410dc152fd1e44966d3066bf7152338573cb45b1c36027de5f0c519abd414d97a37bccef07f6a5281 SHA512 295f1a669020bbe2874e9b03afd46b5d083073b276fca3543f3767a2d74f35df81cf0a67abad50c200cf7a3af36ec98ff9977cb7d5c19f334af7d3bb1926a3de
 DIST gcc-15.0.0-patches-21.tar.xz 16832 BLAKE2B 75a781cf9c7d9b2087d598d751fc1d2e4322b801c1864bb03c68c0a419f65051224febedd608473dec5ca76e2cdaf4ba3d3f1bd86eb13a71ceedb61983ecb208 SHA512 2ffac32494c455d969a7bafcdd8f68fb9d1905fdb4a6f966160f8ad89680d57d07361326739828c57b3e7c89138f74616f47522611982bc902466a14b08f0859
 DIST gcc-8.5.0-patches-4.tar.xz 18616 BLAKE2B 7594cbaea5daecf1a0b3d526c06aeba0a84c6da66aee2e105a51fda6be8d30a37ccc3814281b284a4582d892a1d556bca063551584edfc2525bed8ea5b6888e7 SHA512 1aa5742c361186637e7855f06feb1a4547e7d4d5de6e51f3d049e0ef3c19e2eff179465f52781739f59422035b7f8e4c0efa3844849f920f3c96acfdc37ca6a6

sys-devel/gcc/gcc-15.0.0_pre20241103.ebuild

@@ -0,0 +1,53 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+TOOLCHAIN_PATCH_DEV="sam"
+TOOLCHAIN_HAS_TESTS=1
+PATCH_GCC_VER="15.0.0"
+PATCH_VER="21"
+MUSL_VER="2"
+MUSL_GCC_VER="15.0.0"
+PYTHON_COMPAT=( python3_{10..12} )
+
+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_user
+}