sci-mathematics/singular: ensure compatibility with flint 3.3.1

Signed-off-by: Dima Pasechnik <dima@pasechnik.info>
Signed-off-by: Michael Orlitzky <mjo@gentoo.org>

sci-mathematics/singular/files/flint-3.3.0-compatibility.patch

@@ -0,0 +1,26 @@
+diff --git a/factory/FLINTconvert.cc b/factory/FLINTconvert.cc
+index c36f6022d..67c271c5a 100644
+--- a/factory/FLINTconvert.cc
++++ b/factory/FLINTconvert.cc
+@@ -652,7 +652,7 @@ convertFacCFMatrix2Fq_nmod_mat_t (fq_nmod_mat_t M,
+   {
+     for(j=m.columns();j>0;j--)
+     {
+-      convertFacCF2nmod_poly_t (M->rows[i-1]+j-1, m (i,j));
++      convertFacCF2nmod_poly_t (fq_nmod_mat_entry (M, i-1, j-1), m (i,j));
+     }
+   }
+ }
+diff --git a/libpolys/polys/flintconv.cc b/libpolys/polys/flintconv.cc
+index 89152f5e4..56d527c16 100644
+--- a/libpolys/polys/flintconv.cc
++++ b/libpolys/polys/flintconv.cc
+@@ -331,7 +331,7 @@ void convSingMFlintFq_nmod_mat(matrix m, fq_nmod_mat_t M, const fq_nmod_ctx_t fq
+   {
+     for(j=MATCOLS(m);j>0;j--)
+     {
+-      convSingPFlintnmod_poly_t (M->rows[i-1]+j-1, MATELEM(m,i,j),r);
++      convSingPFlintnmod_poly_t (fq_nmod_mat_entry (M, i-1, j-1), MATELEM(m,i,j),r);
+     }
+   }
+ }

sci-mathematics/singular/singular-4.4.1-r1.ebuild

@@ -0,0 +1,110 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit elisp-common
+
+MY_PN=Singular
+MY_PV=$(ver_rs 3 '')
+# Consistency is different...
+MY_DIR2=$(ver_cut 1-3 ${PV})
+MY_DIR=$(ver_rs 1- '-' ${MY_DIR2})
+
+DESCRIPTION="Computer algebra system for polynomial computations"
+HOMEPAGE="https://www.singular.uni-kl.de/ https://github.com/Singular/Singular"
+SRC_URI="https://www.singular.uni-kl.de/ftp/pub/Math/${MY_PN}/SOURCES/${MY_DIR}/${PN}-${MY_PV}.tar.gz"
+S="${WORKDIR}/${PN}-${MY_DIR2}"
+
+# Most files say "version 2 or version 3 of the License," which is not
+# quite GPL-2+, and is why we have listed GPL-2 below. But AFAIK there
+# are no GPL-2-only files.
+LICENSE="BSD GPL-2 GPL-2+ GPL-3"
+SLOT="0"
+KEYWORDS="~amd64 ~ppc ~riscv ~x86 ~x86-linux"
+IUSE="emacs examples polymake +readline"
+
+# The interactive help uses "info" from sys-apps/texinfo.
+RDEPEND="
+	dev-lang/perl
+	dev-libs/gmp:0=
+	dev-libs/ntl:=
+	sci-libs/cddlib
+	sci-mathematics/flint:=
+	sys-apps/texinfo
+	emacs? ( app-editors/emacs:* )
+	polymake? ( sci-mathematics/polymake )
+	readline? ( sys-libs/readline:= )
+"
+DEPEND="${RDEPEND}"
+
+SITEFILE=60${PN}-gentoo.el
+
+PATCHES=(
+	"${FILESDIR}/flint-3.3.0-compatibility.patch"
+)
+
+src_configure() {
+	local myconf=(
+		--disable-debug
+		--disable-doc
+		--disable-optimizationflags
+		--disable-pyobject-module
+		--disable-python
+		--disable-python-module
+		--disable-python_module
+		--enable-factory
+		--enable-gfanlib
+		--enable-libfac
+		--with-flint
+		--with-gmp
+		--with-libparse
+		--with-ntl
+		--without-python
+		--without-pythonmodule
+		$(use_enable emacs)
+		$(use_enable polymake polymake-module)
+		$(use_with readline)
+	)
+	econf "${myconf[@]}"
+}
+
+src_compile() {
+	default
+
+	if use emacs; then
+		pushd "${S}"/emacs
+		elisp-compile *.el || die "elisp-compile failed"
+		popd
+	fi
+}
+
+src_install() {
+	# Do not compress singular's info file (singular.hlp)
+	# some consumer of that file do not know how to deal with compression
+	docompress -x /usr/share/info
+
+	default
+
+	dosym Singular /usr/bin/"${PN}"
+
+	find "${ED}" -type f -name '*.la' -delete || die
+}
+
+src_test() {
+	# SINGULAR_PROCS_DIR need to be set to "" otherwise plugins from
+	# an already installed version of singular may be used and cause segfault
+	# See https://github.com/Singular/Sources/issues/980
+	SINGULAR_PROCS_DIR="" emake check
+}
+
+pkg_postinst() {
+	einfo "Additional functionality can be enabled by installing"
+	einfo "sci-mathematics/4ti2"
+
+	use emacs && elisp-site-regen
+}
+
+pkg_postrm() {
+	use emacs && elisp-site-regen
+}