app-benchmarks/iozone: build fixes

* Build with LFS (append-lfs-flags) to fix Modern C issue, hits
  releng builds
* Build w/ -std=gnu17 as fails w/ -std=gnu23 (default in GCC 15)

Closes: https://bugs.gentoo.org/942587
Signed-off-by: Sam James <sam@gentoo.org>

app-benchmarks/iozone/iozone-3.506-r1.ebuild

@@ -0,0 +1,78 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit flag-o-matic toolchain-funcs
+
+DESCRIPTION="Filesystem benchmarking program"
+HOMEPAGE="http://www.iozone.org/"
+SRC_URI="http://www.iozone.org/src/current/${PN}${PV/./_}.tar"
+S="${WORKDIR}/${PN}${PV/./_}"
+
+LICENSE="freedist"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~ppc ~ppc64 ~riscv ~sparc ~x86"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-3.506-include-function-parameters.patch
+)
+
+src_prepare() {
+	default
+
+	# Options FIX
+	sed -e '/CC	=.*/d' \
+		-e 's:-O[23]:$(CFLAGS):g' \
+		-e 's:-Dlinux:$(LDFLAGS) -Dlinux:g' \
+		-i src/current/makefile || die
+}
+
+src_configure() {
+	tc-export CC
+
+	case ${ARCH} in
+		x86|alpha|riscv)  PLATFORM="linux";;
+		arm)              PLATFORM="linux-arm";;
+		ppc)              PLATFORM="linux-powerpc";;
+		ppc64)            PLATFORM="linux-powerpc64";;
+		amd64)            PLATFORM="linux-AMD64";;
+		ia64)             PLATFORM="linux-ia64";;
+		s390)             PLATFORM="linux-S390";;
+		*)                PLATFORM="linux-${ARCH}";;
+	esac
+
+	# makefile uses $(GCC) in a few places, probably
+	# by mistake.
+	export GCC="$(tc-getCC)"
+
+	# bug #942587
+	append-lfs-flags
+
+	append-cflags -std=gnu17
+
+	# Otherwise it uses K&R function declaration where ints are sometimes omited
+	# https://bugs.gentoo.org/894334
+	append-cppflags -DHAVE_ANSIC_C
+}
+
+src_compile() {
+	emake -C src/current ${PLATFORM}
+}
+
+src_test() {
+	cd "${T}" || die
+	"${S}"/src/current/iozone testfile || die "self test failed"
+}
+
+src_install() {
+	dosbin src/current/{iozone,fileop}
+
+	# decompress pre-compressed file to make QA check happy
+	gunzip docs/Iozone_ps.gz || die
+
+	dodoc docs/I* docs/Run_rules.doc src/current/Changes.txt
+	doman docs/iozone.1
+	cd src/current || die
+	dodoc Generate_Graphs Gnuplot.txt gengnuplot.sh gnu3d.dem
+}