dev-libs/tomsfastmath: compatibility patch for (incoming) libtomcrypt

In a yet unreleased version of tomsfastmath, this patch
was added to export a needed symbol which libtomcrypt
makes use of.

Include it so that libtomcrypt can be built against
tomsfastmath if desired.

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

2 files changed, 82 insertions, 0 deletions

diff --git a/dev-libs/tomsfastmath/files/tomsfastmath-0.13.1-export-fp_isprime_ex.patch b/dev-libs/tomsfastmath/files/tomsfastmath-0.13.1-export-fp_isprime_ex.patch
new file mode 100644
index 000000000000..627bf4b2f4d9
--- /dev/null
+++ b/dev-libs/tomsfastmath/files/tomsfastmath-0.13.1-export-fp_isprime_ex.patch
@@ -0,0 +1,13 @@
+Needed because libtomcrypt expects this symbol to be available
+https://github.com/libtom/tomsfastmath/commit/81530c207da8b3a43867da14df7d79d2cdf96978.patch
+--- a/libtfm.symbols
++++ b/libtfm.symbols
+@@ -16,6 +16,7 @@ fp_gcd
+ fp_ident
+ fp_invmod
+ fp_isprime
++fp_isprime_ex
+ fp_lcm
+ fp_lshd
+ fp_mod
+
diff --git a/dev-libs/tomsfastmath/tomsfastmath-0.13.1-r1.ebuild b/dev-libs/tomsfastmath/tomsfastmath-0.13.1-r1.ebuild
new file mode 100644
index 000000000000..738e6706e8c4
--- /dev/null
+++ b/dev-libs/tomsfastmath/tomsfastmath-0.13.1-r1.ebuild
@@ -0,0 +1,69 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit toolchain-funcs
+
+DESCRIPTION="Fast public domain large integer arithmetic library"
+HOMEPAGE="https://www.libtom.net/TomsFastMath/
+	https://github.com/libtom/tomsfastmath"
+SRC_URI="https://github.com/libtom/tomsfastmath/releases/download/v${PV}/tfm-${PV}.tar.xz"
+LICENSE="Unlicense"
+
+# Current SONAME is 1
+# Please bump when the ABI changes upstream
+# Helpful site:
+# https://abi-laboratory.pro/index.php?view=timeline&l=tomsfastmath
+SLOT="0/1"
+
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~ppc ~ppc64 ~sparc ~x86"
+
+PATCHES=(
+	"${FILESDIR}/${P}-makefile-fix.patch"
+	"${FILESDIR}/${PN}-0.13.1-export-fp_isprime_ex.patch"
+)
+
+_emake() {
+	# Standard boilerplate
+	# Upstream use homebrewed makefiles
+	# Best to use same args for all, for consistency,
+	# in case behaviour changes (v possible).
+	emake \
+		CC="$(tc-getCC)" \
+		AR="$(tc-getAR)" \
+		RANLIB="$(tc-getRANLIB)" \
+		DESTDIR="${ED}" \
+		LIBPATH="/usr/$(get_libdir)" \
+		IGNORE_SPEED=1 \
+		"$@"
+}
+
+src_compile() {
+	_emake -f makefile.shared
+}
+
+src_test() {
+	_emake test_standalone stest rsatest
+
+	# We choose to be verbose during the test process
+	# because the output is quite repetitive with no
+	# clear demarcation b/t tests
+	local tests=( "test" "stest" "rsatest" )
+
+	local test
+	for test in "${tests[@]}"; do
+		einfo "Running test (${test})"
+		./${test} || die "Test (${test}) failed"
+		einfo "Completed test (${test})"
+	done
+}
+
+src_install() {
+	_emake -f makefile.shared install
+
+	# Remove unnecessary .la files
+	find "${ED}" -name '*.la' -delete || die
+	# Same for static libs
+	find "${ED}" -name "*.a" -delete || die
+}