user/libsigsegv: import from Alpine

user/libsigsegv/APKBUILD

+# Contributor: Carlo Landmeter <clandmeter@gmail.com>
+# Contributor: Lee Starnes <lee@canned-death.us>
+# Maintainer: Lee Starnes <lee@canned-death.us>
+pkgname=libsigsegv
+pkgver=2.12
+pkgrel=0
+pkgdesc="A library for handling page faults in user mode"
+url="https://www.gnu.org/software/libsigsegv"
+arch="all"
+license="GPL-2.0-or-later"
+depends=""
+makedepends=""
+subpackages="$pkgname-dev"
+source="https://ftp.gnu.org/gnu/$pkgname/$pkgname-$pkgver.tar.gz"
+builddir="$srcdir/$pkgname-$pkgver"
+
+build() {
+	./configure \
+		--prefix=/usr \
+		--build=$CBUILD \
+		--host=$CHOST \
+		--localstatedir=/var \
+		--sysconfdir=/etc \
+		--enable-shared
+	make
+}
+
+check() {
+	make check
+}
+
+package() {
+	make DESTDIR="$pkgdir" install
+	rm -r "$pkgdir"/usr/include
+}
+
+dev() {
+	install -D -m 0444 "$builddir"/src/sigsegv.h "$subpkgdir"/usr/include/sigsegv.h
+}
+
+sha512sums="27986e8aaf4357ed131032aa7c281a5a28c5759530c62bb76f034aea33959547dcaae805e06347a1f532f0488b72fbbbdac4400f74e8d3f2128511526e8a5913  libsigsegv-2.12.tar.gz"