plan9port: update to 20190619.

+ build with libucontext on musl

srcpkgs/plan9port/patches/linux5.patch

@@ -0,0 +1,24 @@
+From 81268c62d35f4b4bc226a4916a8354764b1f5853 Mon Sep 17 00:00:00 2001
+From: Ivy Foster <iff@escondida.tk>
+Date: Sat, 18 May 2019 14:25:01 -0500
+Subject: [PATCH] 9l: Update and near-future-proof Linux version check
+
+---
+ bin/9l | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git bin/9l bin/9l
+index 6195815f7..d03b4760e 100755
+--- bin/9l
++++ bin/9l
+@@ -40,7 +40,9 @@ case "$tag" in
+ 	userpath=true
+ 	extralibs="$extralibs -lutil -lresolv"
+ 	case "${SYSVERSION:-`uname -r`}" in
+-	2.6.* | 3.* | 4.*)
++	# Assuming that versions change more often than the name of
++	# the threading library, this should save some future updates.
++	2.6.* | [3-9].* | [1-9][0-9].*)
+ 		extralibs="$extralibs -lpthread"
+ 		;;
+ 	esac

srcpkgs/plan9port/patches/musl_getdents.patch

@@ -0,0 +1,22 @@
+diff --git src/lib9/dirread.c src/lib9/dirread.c
+index 40fbe3c7..9e77eac8 100644
+--- src/lib9/dirread.c
++++ src/lib9/dirread.c
+@@ -10,6 +10,7 @@ extern int _p9dir(struct stat*, struct stat*, char*, Dir*, char**, char*);
+ static int
+ mygetdents(int fd, struct dirent *buf, int n)
+ {
++#if defined(__GLIBC__)
+ 	off_t off;
+ 	int nn;
+ 
+@@ -17,6 +18,9 @@ mygetdents(int fd, struct dirent *buf, int n)
+ 	off = p9seek(fd, 0, 1);
+ 	nn = getdirentries(fd, (void*)buf, n, &off);
+ 	return nn;
++#else
++	return getdents(fd, (void*)buf, n);
++#endif
+ }
+ #elif defined(__APPLE__) 
+ static int

srcpkgs/plan9port/template

@@ -1,36 +1,44 @@
 # Template file for 'plan9port'
 pkgname=plan9port
-version=20181112
+version=20190619
 revision=1
-_githash=13ed1c423ecbd45d2ca982f2a7a433b785873629
-archs="i686 x86_64 ppc64le"  # swapcontext
+_githash=e995a0c101863688d5f14649ae3de45a7c43789c
+archs="i686* x86_64* ppc64le*"
 wrksrc="${pkgname}-${_githash}"
 hostmakedepends="perl"
 makedepends="libX11-devel libXt-devel libXext-devel freetype-devel fontconfig-devel"
 short_desc="Port of many Plan 9 programs to Unix-like operating systems"
 maintainer="Leah Neukirchen <leah@vuxu.org>"
-license="custom"
+license="LPL-1.02"
 homepage="https://9fans.github.io/plan9port/"
 distfiles="https://github.com/9fans/plan9port/archive/${_githash}.tar.gz"
-checksum=c86467b826331243db7814dcb1223d294c8ffaaaf5d9cb13d397c47a61e2ff39
+checksum=639e0bb01728ffd7cc1751eeb1bfc7314615d88d6fa7f4cde21033ad97622624
 nocross=yes
 
+if [[ $XBPS_TARGET_MACHINE == *-musl ]]; then
+	makedepends+=" libucontext-devel"
+fi
+
 post_extract() {
 	# add missing LDFLAGS for some rules
-	sed -i '/prereq$/s/$/ $LDFLAGS/' \
-		src/cmd/auth/factotum/mkfile \
-		src/cmd/auth/secstore/mkfile \
-		src/cmd/devdraw/mkfile \
-		src/cmd/faces/mkfile \
-		src/cmd/mkfile
-	sed -i 's/-lX11$/& $LDFLAGS/g' src/cmd/rio/mkfile
-	sed -i '1i#include <sys/types.h>' lib/linux-isnptl.c
+	vsed -e '/prereq$/s/$/ $LDFLAGS/' \
+		-i src/cmd/auth/factotum/mkfile \
+		-i src/cmd/auth/secstore/mkfile \
+		-i src/cmd/devdraw/mkfile \
+		-i src/cmd/faces/mkfile \
+		-i src/cmd/mkfile
+	vsed -e 's/-lX11$/& $LDFLAGS/g' -i src/cmd/rio/mkfile
+	vsed -e '1i#include <sys/types.h>' -i lib/linux-isnptl.c
 }
 do_build() {
 	CFLAGS+=' -D_DEFAULT_SOURCE'
 	echo "CFLAGS='$CFLAGS'" >LOCAL.config
 	echo "LDFLAGS='$LDFLAGS'" >>LOCAL.config
-	sed -i 's/-O2/$CFLAGS/' bin/9c
+	vsed -e 's/-O2/$CFLAGS/' -i bin/9c
+	if [[ $XBPS_TARGET_MACHINE == *-musl ]]; then
+		# add libucontext to extralibs under linux
+		vsed -e '/^\textralibs=.*-lresolv"$/s/"$/ -lucontext"/' -i bin/9l
+	fi
 
 	./INSTALL
 }