dev-libs/gmp: fix s390 symbol leak on -mzarch

Reported-by: Sam James
Bug: https://bugs.gentoo.org/761310
Package-Manager: Portage-3.0.16, Repoman-3.0.2
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

2 files changed, 128 insertions, 0 deletions

diff --git a/dev-libs/gmp/files/gmp-6.2.1-no-zarch.patch b/dev-libs/gmp/files/gmp-6.2.1-no-zarch.patch
new file mode 100644
index 000000000000..6ba7c8aa561b
--- /dev/null
+++ b/dev-libs/gmp/files/gmp-6.2.1-no-zarch.patch
@@ -0,0 +1,20 @@
+configure.ac decides whether udiv_w_sdiv.c fallback is needed
+based on $CHOST value (without $CFLAGS). longlong.h relies
+on compiler macros (relies on $CFLAGS implicitly).
+
+That leads to use of undefined macros. The workaround makes
+udiv_w_sdiv.c a no-on for -mzarch.
+
+https://bugs.gentoo.org/761310
+--- a/mpn/generic/udiv_w_sdiv.c
++++ b/mpn/generic/udiv_w_sdiv.c
+@@ -1,3 +1,4 @@
++#if !defined(__zarch__)
+ /* mpn_udiv_w_sdiv -- implement udiv_qrnnd on machines with only signed
+    division.
+ 
+@@ -139,3 +140,4 @@ mpn_udiv_w_sdiv (mp_limb_t *rp, mp_limb_t a1, mp_limb_t a0, mp_limb_t d)
+   *rp = r;
+   return q;
+ }
++#endif
diff --git a/dev-libs/gmp/gmp-6.2.1-r1.ebuild b/dev-libs/gmp/gmp-6.2.1-r1.ebuild
new file mode 100644
index 000000000000..9046e8651103
--- /dev/null
+++ b/dev-libs/gmp/gmp-6.2.1-r1.ebuild
@@ -0,0 +1,108 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit flag-o-matic eutils libtool multilib-minimal toolchain-funcs
+
+MY_PV=${PV/_p*}
+MY_PV=${MY_PV/_/-}
+MANUAL_PV=$MY_PV
+MANUAL_PV=6.2.0 # 6.2.1 manual is not ready yet
+MY_P=${PN}-${MY_PV}
+PLEVEL=${PV/*p}
+DESCRIPTION="Library for arbitrary-precision arithmetic on different type of numbers"
+HOMEPAGE="https://gmplib.org/"
+SRC_URI="ftp://ftp.gmplib.org/pub/${MY_P}/${MY_P}.tar.xz
+	mirror://gnu/${PN}/${MY_P}.tar.xz
+	doc? ( https://gmplib.org/${PN}-man-${MANUAL_PV}.pdf )"
+
+LICENSE="|| ( LGPL-3+ GPL-2+ )"
+# The subslot reflects the C & C++ SONAMEs.
+SLOT="0/10.4"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~x64-cygwin ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+IUSE="+asm doc +cxx pic static-libs"
+
+BDEPEND="sys-devel/m4
+	app-arch/xz-utils"
+
+S=${WORKDIR}/${MY_P%a}
+
+DOCS=( AUTHORS ChangeLog NEWS README doc/configuration doc/isa_abi_headache )
+HTML_DOCS=( doc )
+MULTILIB_WRAPPED_HEADERS=( /usr/include/gmp.h )
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-6.1.0-noexecstack-detect.patch
+	"${FILESDIR}"/${PN}-6.2.1-no-zarch.patch
+)
+
+src_prepare() {
+	default
+
+	# note: we cannot run autotools here as gcc depends on this package
+	elibtoolize
+
+	# https://bugs.gentoo.org/536894
+	if [[ ${CHOST} == *-darwin* ]] ; then
+		eapply "${FILESDIR}"/${PN}-6.1.2-gcc-apple-4.0.1.patch
+	fi
+
+	# GMP uses the "ABI" env var during configure as does Gentoo (econf).
+	# So, to avoid patching the source constantly, wrap things up.
+	mv configure configure.wrapped || die
+	cat <<-\EOF > configure
+	#!/usr/bin/env sh
+	exec env ABI="${GMPABI}" "$0.wrapped" "$@"
+	EOF
+	# Patches to original configure might have lost the +x bit.
+	chmod a+rx configure{,.wrapped} || die
+}
+
+multilib_src_configure() {
+	# Because of our 32-bit userland, 1.0 is the only HPPA ABI that works
+	# https://gmplib.org/manual/ABI-and-ISA.html#ABI-and-ISA (bug #344613)
+	if [[ ${CHOST} == hppa2.0-* ]] ; then
+		GMPABI="1.0"
+	fi
+
+	# ABI mappings (needs all architectures supported)
+	case ${ABI} in
+		32|x86)       GMPABI=32;;
+		64|amd64|n64) GMPABI=64;;
+		[onx]32)      GMPABI=${ABI};;
+	esac
+	export GMPABI
+
+	#367719
+	if [[ ${CHOST} == *-mint* ]]; then
+		filter-flags -O?
+	fi
+
+	# --with-pic forces static libraries to be built as PIC
+	# and without TEXTRELs. musl does not support TEXTRELs: bug #707332
+	tc-export CC
+	ECONF_SOURCE="${S}" econf \
+		CC_FOR_BUILD="$(tc-getBUILD_CC)" \
+		--localstatedir="${EPREFIX}"/var/state/gmp \
+		--enable-shared \
+		$(use_enable asm assembly) \
+		$(use_enable cxx) \
+		$(use pic && echo --with-pic) \
+		$(use_enable static-libs static)
+}
+
+multilib_src_install() {
+	emake DESTDIR="${D}" install
+
+	# should be a standalone lib
+	rm -f "${ED}"/usr/$(get_libdir)/libgmp.la
+	# this requires libgmp
+	local la="${ED}/usr/$(get_libdir)/libgmpxx.la"
+	use static-libs || rm -f "${la}"
+}
+
+multilib_src_install_all() {
+	einstalldocs
+	use doc && cp "${DISTDIR}"/gmp-man-${MANUAL_PV}.pdf "${ED}"/usr/share/doc/${PF}/
+}