sys-devel/gcc: add 15.0.1_pre20250418 (RC1)

Signed-off-by: Sam James <sam@gentoo.org>

sys-devel/gcc/Manifest

@@ -39,6 +39,8 @@ DIST gcc-15-20250413.tar.xz 91915660 BLAKE2B 80b2ad128d4bdbf3abf2295abfe452c1a1b
 DIST gcc-15.0.0-musl-patches-2.tar.xz 3076 BLAKE2B 0073248fe4f7dd827980559017b5aa1fb5c4c46acc9ad5c410dc152fd1e44966d3066bf7152338573cb45b1c36027de5f0c519abd414d97a37bccef07f6a5281 SHA512 295f1a669020bbe2874e9b03afd46b5d083073b276fca3543f3767a2d74f35df81cf0a67abad50c200cf7a3af36ec98ff9977cb7d5c19f334af7d3bb1926a3de
 DIST gcc-15.0.0-patches-53.tar.xz 27892 BLAKE2B 0c1455cae4aee49051fb5a8c31b8f82765da8ad9509ef17cb8c9f96d2c53a73fe1c8cfc0a2708e3bce0f8deb6f5e16807d8739bfd06cc6c08788331a719ded73 SHA512 c8f375f4de882ba99872f649f2cbbcc1b9f89d3dc9b355c1d11abfb6daf3ae7e89b82e002497215b641175d42d9f9a94749add2af2a5b6bcc1f3f5b41320df5b
 DIST gcc-15.0.0-patches-54.tar.xz 20764 BLAKE2B fdd746b5243858d940e67f3dc11e085f370244c890e35b3f0b1b4af4f978ec98b5204b9874e9defd422f508262060e0b489ef85f5ba9b2296af371a7ed879bd5 SHA512 ecf38b4637c30ee7a0f74c73c55a3ba2d193d39e82e4bfe058494a5d125596bef547ea70ce52bf109cdec4aa31c3ed8c2b32ae52a9d9827be2b10e8fe0875e82
+DIST gcc-15.0.0-patches-55.tar.xz 19028 BLAKE2B f01935ebcf814b34c0319e6b92cb3fc83a562990743d906fe171583ae583e4e6a8c31abba893b0a9b2e1665c3af62271e5ffdad0626a8585dd92e085c886c82e SHA512 1c46d0fb96dadf51a3aa48db97210eb4d9b92f6b9f4ac08af41009a385ef9ed064432a92b5e3163d9ca8bd9065cd5934b2792359ec8c09203e950e21d29119b4
+DIST gcc-15.1.0-RC-20250418.tar.xz 98299960 BLAKE2B ba69804ff07c5ec4034c62827d00b03c3cd3b9af5e8dc0a7ad17edca5f82c0af1cfe4cbccea2fd42211cc29da4988006bb211bf84779054e480373778467f9f6 SHA512 38ff20b0c79ce9056905adb70af3566075bff1e700b0cbc64477a0c3374d254a4c6bb334e2360add33954701414238a8ec0a06f455a42906d5fc86995f2f5bd4
 DIST gcc-8.5.0-patches-4.tar.xz 18616 BLAKE2B 7594cbaea5daecf1a0b3d526c06aeba0a84c6da66aee2e105a51fda6be8d30a37ccc3814281b284a4582d892a1d556bca063551584edfc2525bed8ea5b6888e7 SHA512 1aa5742c361186637e7855f06feb1a4547e7d4d5de6e51f3d049e0ef3c19e2eff179465f52781739f59422035b7f8e4c0efa3844849f920f3c96acfdc37ca6a6
 DIST gcc-8.5.0.tar.xz 63841008 BLAKE2B aa81a1a730fd7371360f6abed6ba78b5843fd18c58d5de5687acc320741b9e430e85df3535a1ef7a26051409be8d2f0945f503e5968480d919103123a99d4b12 SHA512 92f599680e6b7fbce88bcdda810f468777d541e5fddfbb287f7977d51093de2a5178bd0e6a08dfe37090ea10a0508a43ccd00220041abbbec33f1179bfc174d8
 DIST gcc-9.5.0-patches-2.tar.xz 14324 BLAKE2B 1d3bf3e673108ad2fcdcb86daefb4603d1c9f6aa815e34d1591054d466b76d6f50cce124ab4760528c4951ea16eb00888a3e6485417f81ebf250548732df4a8e SHA512 a6d6f650aaf0bd193a17ac279649f0544a282cea295824384c59341c3000eac4b574b60e00dd427585d928f9768166abf85168b47772132790ad98854acacbbf

sys-devel/gcc/gcc-15.0.1_pre20250418.ebuild

@@ -0,0 +1,56 @@
+# Copyright 1999-2025 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
+TOOLCHAIN_GCC_RC=1
+PATCH_GCC_VER="15.0.0"
+PATCH_VER="55"
+MUSL_VER="2"
+MUSL_GCC_VER="15.0.0"
+PYTHON_COMPAT=( python3_{10..13} )
+
+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
+}