sys-libs/ncurses-compat: Split ABI compat version out of ncurses

Split the :5 SONAME compatibility slot of sys-libs/ncurses into its own
package.  This is mostly meant to resolve outstanding problem with
missing slot on dependencies, ncurses being the most common offender.
By moving the compatibility into separate package, we no longer have
to worry about people mistakenly not specifying the correct slot.

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

12 files changed, 608 insertions, 1 deletions

diff --git a/profiles/base/package.use.force b/profiles/base/package.use.force
index 732de2ed84d0..e64b86353b9d 100644
--- a/profiles/base/package.use.force
+++ b/profiles/base/package.use.force
@@ -23,6 +23,7 @@ sys-libs/glibc static-libs
 # affected.  On the other hand, disabling USE=tinfo is capable of
 # breaking installed packages.
 sys-libs/ncurses tinfo
+sys-libs/ncurses-compat tinfo
 
 # Mart Raudsepp <leio@gentoo.org> (2018-12-14)
 # Security is not optional if available for the architecture/kernel.
diff --git a/profiles/prefix/windows/package.use.mask b/profiles/prefix/windows/package.use.mask
index 8aa55bffc312..a7308f8b5f20 100644
--- a/profiles/prefix/windows/package.use.mask
+++ b/profiles/prefix/windows/package.use.mask
@@ -1,6 +1,7 @@
-# Copyright 1999-2019 Gentoo Foundation
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # Michael Haubenwallner <haubi@gentoo.org> (2019-07-31)
 # KERNEL=Winnt needs term-driver, which conflicts with termlib
 sys-libs/ncurses tinfo
+sys-libs/ncurses-compat tinfo
diff --git a/sys-libs/ncurses-compat/Manifest b/sys-libs/ncurses-compat/Manifest
new file mode 100644
index 000000000000..db2086cf89e6
--- /dev/null
+++ b/sys-libs/ncurses-compat/Manifest
@@ -0,0 +1 @@
+DIST ncurses-5.9.tar.gz 2826473 BLAKE2B 91101b049a5eb6a2674fb86b5eba56515207f490dc7a6348f3194bbc50649717a26aff7a0df64f67ca318b5f244455cd57e760c65b9e551f6ec65b8c035a6ae1 SHA512 d7c5e54b6d4d8b9211f0006ca8786f7609d180cc1aaebf4f25e7e35e12959779cf66447359a602daed625621ca32b0d910d67aef3eb8b6fdc3c373819a88faa1
diff --git a/sys-libs/ncurses-compat/files/ncurses-5.7-nongnu.patch b/sys-libs/ncurses-compat/files/ncurses-5.7-nongnu.patch
new file mode 100644
index 000000000000..3f4a40520009
--- /dev/null
+++ b/sys-libs/ncurses-compat/files/ncurses-5.7-nongnu.patch
@@ -0,0 +1,11 @@
+--- ncurses-5.7/ncurses/curses.priv.h
++++ ncurses-5.7/ncurses/curses.priv.h
+@@ -1452,6 +1452,8 @@ extern NCURSES_EXPORT(void) _nc_expanded
+ 
+ /* charable.c */
+ #if USE_WIDEC_SUPPORT
++#include <wchar.h>
++
+ extern NCURSES_EXPORT(bool) _nc_is_charable(wchar_t);
+ extern NCURSES_EXPORT(int) _nc_to_char(wint_t);
+ extern NCURSES_EXPORT(wint_t) _nc_to_widechar(int);
diff --git a/sys-libs/ncurses-compat/files/ncurses-5.8-gfbsd.patch b/sys-libs/ncurses-compat/files/ncurses-5.8-gfbsd.patch
new file mode 100644
index 000000000000..0200a14462af
--- /dev/null
+++ b/sys-libs/ncurses-compat/files/ncurses-5.8-gfbsd.patch
@@ -0,0 +1,24 @@
+we'll hijack the freebsd* case that comes later
+
+--- ncurses-5.6/aclocal.m4
++++ ncurses-5.6/aclocal.m4
+@@ -3806,7 +3806,7 @@
+ 		fi
+ 		cf_cv_rm_so_locs=yes
+ 		;;
+-	linux*|gnu*|k*bsd*-gnu) #(vi
++	linux*|gnu*|k*bsd*-gnu|freebsd*|dragonfly*) #(vi
+ 		if test "$DFT_LWR_MODEL" = "shared" ; then
+ 			LOCAL_LDFLAGS="-Wl,-rpath,\$(LOCAL_LIBDIR)"
+ 			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
+--- ncurses-5.6/configure
++++ ncurses-5.6/configure
+@@ -3806,7 +3806,7 @@
+ 		fi
+ 		cf_cv_rm_so_locs=yes
+ 		;;
+-	linux*|gnu*|k*bsd*-gnu) #(vi
++	linux*|gnu*|k*bsd*-gnu|freebsd*|dragonfly*) #(vi
+ 		if test "$DFT_LWR_MODEL" = "shared" ; then
+ 			LOCAL_LDFLAGS="-Wl,-rpath,\$(LOCAL_LIBDIR)"
+ 			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
diff --git a/sys-libs/ncurses-compat/files/ncurses-5.9-fix-clang-build.patch b/sys-libs/ncurses-compat/files/ncurses-5.9-fix-clang-build.patch
new file mode 100644
index 000000000000..0c6ca7acc4fc
--- /dev/null
+++ b/sys-libs/ncurses-compat/files/ncurses-5.9-fix-clang-build.patch
@@ -0,0 +1,44 @@
+diff --git a/ncurses-5.9/c++/cursesf.h b/ncurses-5.9/c++/cursesf.h
+index 70a30c3..db38063 100644
+--- a/ncurses-5.9/c++/cursesf.h
++++ b/ncurses-5.9/c++/cursesf.h
+@@ -677,7 +677,7 @@ protected:
+   }
+ 
+ public:
+-  NCursesUserForm (NCursesFormField Fields[],
++  NCursesUserForm (NCursesFormField* Fields[],
+ 		   const T* p_UserData = STATIC_CAST(T*)(0),
+ 		   bool with_frame=FALSE,
+ 		   bool autoDelete_Fields=FALSE)
+@@ -686,7 +686,7 @@ public:
+ 	set_user (const_cast<void *>(p_UserData));
+   };
+ 
+-  NCursesUserForm (NCursesFormField Fields[],
++  NCursesUserForm (NCursesFormField* Fields[],
+ 		   int nlines,
+ 		   int ncols,
+ 		   int begin_y = 0,
+diff --git a/ncurses-5.9/c++/cursesm.h b/ncurses-5.9/c++/cursesm.h
+index d9c2273..2d5b79a 100644
+--- a/ncurses-5.9/c++/cursesm.h
++++ b/ncurses-5.9/c++/cursesm.h
+@@ -635,7 +635,7 @@ protected:
+   }
+ 
+ public:
+-  NCursesUserMenu (NCursesMenuItem Items[],
++  NCursesUserMenu (NCursesMenuItem* Items[],
+ 		   const T* p_UserData = STATIC_CAST(T*)(0),
+ 		   bool with_frame=FALSE,
+ 		   bool autoDelete_Items=FALSE)
+@@ -644,7 +644,7 @@ public:
+ 	set_user (const_cast<void *>(p_UserData));
+   };
+ 
+-  NCursesUserMenu (NCursesMenuItem Items[],
++  NCursesUserMenu (NCursesMenuItem* Items[],
+ 		   int nlines,
+ 		   int ncols,
+ 		   int begin_y = 0,
diff --git a/sys-libs/ncurses-compat/files/ncurses-5.9-gcc-5.patch b/sys-libs/ncurses-compat/files/ncurses-5.9-gcc-5.patch
new file mode 100644
index 000000000000..2448229b88e1
--- /dev/null
+++ b/sys-libs/ncurses-compat/files/ncurses-5.9-gcc-5.patch
@@ -0,0 +1,46 @@
+https://bugs.gentoo.org/545114
+
+extracted from the upstream change (which had many unrelated commits in one)
+
+From 97bb4678dc03e753290b39bbff30ba2825df9517 Mon Sep 17 00:00:00 2001
+From: "Thomas E. Dickey" <dickey@invisible-island.net>
+Date: Sun, 7 Dec 2014 03:10:09 +0000
+Subject: [PATCH] ncurses 5.9 - patch 20141206
+
++ modify MKlib_gen.sh to work around change in development version of
+  gcc introduced here:
+	  https://gcc.gnu.org/ml/gcc-patches/2014-06/msg02185.html
+	  https://gcc.gnu.org/ml/gcc-patches/2014-07/msg00236.html
+  (reports by Marcus Shawcroft, Maohui Lei).
+
+diff --git a/ncurses/base/MKlib_gen.sh b/ncurses/base/MKlib_gen.sh
+index d8cc3c9..b91398c 100755
+--- a/ncurses/base/MKlib_gen.sh
++++ b/ncurses/base/MKlib_gen.sh
+@@ -474,11 +474,22 @@ sed -n -f $ED1 \
+ 	-e 's/gen_$//' \
+ 	-e 's/  / /g' >>$TMP
+ 
++cat >$ED1 <<EOF
++s/  / /g
++s/^ //
++s/ $//
++s/P_NCURSES_BOOL/NCURSES_BOOL/g
++EOF
++
++# A patch discussed here:
++#	https://gcc.gnu.org/ml/gcc-patches/2014-06/msg02185.html
++# introduces spurious #line markers.  Work around that by ignoring the system's
++# attempt to define "bool" and using our own symbol here.
++sed -e 's/bool/P_NCURSES_BOOL/g' $TMP > $ED2
++cat $ED2 >$TMP
++
+ $preprocessor $TMP 2>/dev/null \
+-| sed \
+-	-e 's/  / /g' \
+-	-e 's/^ //' \
+-	-e 's/_Bool/NCURSES_BOOL/g' \
++| sed -f $ED1 \
+ | $AWK -f $AW2 \
+ | sed -f $ED3 \
+ | sed \
diff --git a/sys-libs/ncurses-compat/files/ncurses-5.9-no-I-usr-include.patch b/sys-libs/ncurses-compat/files/ncurses-5.9-no-I-usr-include.patch
new file mode 100644
index 000000000000..5c968e76c378
--- /dev/null
+++ b/sys-libs/ncurses-compat/files/ncurses-5.9-no-I-usr-include.patch
@@ -0,0 +1,45 @@
+https://bugs.gentoo.org/522586
+
+delete the -I$includedir paths that get added to CPPFLAGS.  these are never
+needed when building natively or cross-compiling and really get in the way
+in both cases (upgrades/cross-compiling/etc...).
+
+extracted from the upstream change:
+http://ncurses.scripts.mit.edu/?p=ncurses.git;a=commitdiff;h=9ee3995474454b7d956885e0fe5c8cac2ae25d42#patch5
+
+--- a/configure
++++ b/configure
+@@ -18596,33 +18596,11 @@ CPPFLAGS="$CPPFLAGS -I. -I../include"
+ if test "$srcdir" != "."; then
+ 	CPPFLAGS="$CPPFLAGS -I\${srcdir}/../include"
+ fi
+-if test "$GCC" != yes; then
+-	CPPFLAGS="$CPPFLAGS -I\${includedir}"
+-elif test "$includedir" != "/usr/include"; then
+-	if test "$includedir" = '${prefix}/include' ; then
+-		if test $prefix != /usr ; then
+-			CPPFLAGS="$CPPFLAGS -I\${includedir}"
+-		fi
+-	else
+-		CPPFLAGS="$CPPFLAGS -I\${includedir}"
+-	fi
+-fi
+ 
+ ACPPFLAGS="-I. -I../include -I../../include $ACPPFLAGS"
+ if test "$srcdir" != "."; then
+ 	ACPPFLAGS="-I\${srcdir}/../../include $ACPPFLAGS"
+ fi
+-if test "$GCC" != yes; then
+-	ACPPFLAGS="$ACPPFLAGS -I\${includedir}"
+-elif test "$includedir" != "/usr/include"; then
+-	if test "$includedir" = '${prefix}/include' ; then
+-		if test $prefix != /usr ; then
+-			ACPPFLAGS="$ACPPFLAGS -I\${includedir}"
+-		fi
+-	else
+-		ACPPFLAGS="$ACPPFLAGS -I\${includedir}"
+-	fi
+-fi
+ 
+ ### Build up pieces for makefile rules
+ echo "$as_me:18628: checking default library suffix" >&5
diff --git a/sys-libs/ncurses-compat/files/ncurses-5.9-pkg-config.patch b/sys-libs/ncurses-compat/files/ncurses-5.9-pkg-config.patch
new file mode 100644
index 000000000000..7c3c04a449f8
--- /dev/null
+++ b/sys-libs/ncurses-compat/files/ncurses-5.9-pkg-config.patch
@@ -0,0 +1,26 @@
+disable the $PATH search for the PKG_CONFIG tool.  it isn't needed and just
+gets in the way when setting to a value that might not yet exist.
+
+disable the existence test for the PKG_CONFIG_LIBDIR dir.  it breaks when you
+cross-compile for an ABI that doesn't exist in the root dir (--build).
+
+--- a/configure
++++ b/configure
+@@ -3582,7 +3582,7 @@ fi
+ esac
+ 
+ test -z "$PKG_CONFIG" && PKG_CONFIG=none
+-if test "$PKG_CONFIG" != none ; then
++if false ; then
+ 
+ if test "x$prefix" != xNONE; then
+   cf_path_syntax="$prefix"
+@@ -3626,7 +3626,7 @@ echo $ECHO_N "checking if we should install .pc files for $PKG_CONFIG... $ECHO_C
+ 		PKG_CONFIG_LIBDIR=`echo "$PKG_CONFIG" | sed -e 's,/[^/]*/[^/]*$,,'`/lib/pkgconfig
+ 	fi
+ 	PKG_CONFIG_LIBDIR=`echo "$PKG_CONFIG_LIBDIR" | sed -e 's/^://' -e 's/:.*//'`
+-	if test -n "$PKG_CONFIG_LIBDIR" && test -d "$PKG_CONFIG_LIBDIR" ; then
++	if test -n "$PKG_CONFIG_LIBDIR" ; then
+ 
+ # Check whether --enable-pc-files or --disable-pc-files was given.
+ if test "${enable_pc_files+set}" = set; then
diff --git a/sys-libs/ncurses-compat/files/ncurses-5.9-rxvt-unicode-9.15.patch b/sys-libs/ncurses-compat/files/ncurses-5.9-rxvt-unicode-9.15.patch
new file mode 100644
index 000000000000..b6d1924cbe7e
--- /dev/null
+++ b/sys-libs/ncurses-compat/files/ncurses-5.9-rxvt-unicode-9.15.patch
@@ -0,0 +1,191 @@
+Add rxvt-unicode terminfo, required by rxvt-unicode to function properly.
+
+Providing this in ncurses makes it widely available, much better than having to
+install rxvt-unicode everywhere.
+
+http://bugs.gentoo.org/show_bug.cgi?id=192083
+
+This patch uses the updated rxvt-unicode-9.15 terminfo
+which includes 256 color support and fixes Gentoo bug 383871
+
+http://bugs.gentoo.org/show_bug.cgi?id=383871
+
+--- misc/terminfo.src
++++ misc/terminfo.src
+@@ -4208,6 +4208,176 @@
+ rxvt-16color|xterm with 16 colors like aixterm,
+ 	ncv#32, use=ibm+16color, use=rxvt,
+ 
++# From: Thomas Dickey <dickey@clark.net> 04 Oct 1997
++# Updated: Özgür Kesim <kesim@math.fu-berlin.de> 02 Nov 1997
++# Updated: Marc Lehmann <schmorp@schmorp.de>, 17 Feb 2005
++# Updated: Marc Lehmann <schmorp@schmorp.de>, 04 Nov 2008: change init/reset sequences
++rxvt-unicode|rxvt-unicode terminal (X Window System),
++	am,
++	bce,
++	eo,
++	km,
++	msgr,
++	xenl,
++	hs,
++	cols#80,
++	it#8,
++	lines#24,
++	acsc=``aaffggjjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~-A.B+C\,D0EhFiG,
++	bel=^G,
++	blink=\E[5m,
++	bold=\E[1m,
++	civis=\E[?25l,
++	clear=\E[H\E[2J,
++	cnorm=\E[?25h,
++	cr=^M,
++	csr=\E[%i%p1%d;%p2%dr,
++	cub=\E[%p1%dD,
++	cub1=^H,
++	cud=\E[%p1%dB,
++	cud1=^J,
++	cuf=\E[%p1%dC,
++	cuf1=\E[C,
++	cup=\E[%i%p1%d;%p2%dH,
++	cuu=\E[%p1%dA,
++	cuu1=\E[A,
++	cvvis=\E[?25h,
++	dch=\E[%p1%dP,
++	dch1=\E[P,
++	dl=\E[%p1%dM,
++	dl1=\E[M,
++	ed=\E[J,
++	el=\E[K,
++	el1=\E[1K,
++	flash=\E[?5h$<20/>\E[?5l,
++	home=\E[H,
++	hpa=\E[%i%p1%dG,
++	ht=^I,
++	hts=\EH,
++	ich=\E[%p1%d@,
++	ich1=\E[@,
++	il=\E[%p1%dL,
++	il1=\E[L,
++	ind=^J,
++	is1=\E[\041p,
++	is2=\E[r\E[m\E[2J\E[?7;25h\E[?1;3;4;5;6;9;66;1000;1001;1049l\E[4l,
++	kDC=\E[3$,
++	kIC=\E[2$,
++	kEND=\E[8$,
++	kHOM=\E[7$,
++	kLFT=\E[d,
++	kNXT=\E[6$,
++	kPRV=\E[5$,
++	kRIT=\E[c,
++	kbs=\177,
++	ka1=\EOw,
++	ka3=\EOy,
++	kb2=\EOu,
++	kc1=\EOq,
++	kc3=\EOs,
++	kcbt=\E[Z,
++	kcub1=\E[D,
++	kcud1=\E[B,
++	kcuf1=\E[C,
++	kcuu1=\E[A,
++	kdch1=\E[3~,
++	kel=\E[8\^,
++	kend=\E[8~,
++	kent=\EOM,
++	kf1=\E[11~,
++	kf10=\E[21~,
++	kf11=\E[23~,
++	kf12=\E[24~,
++	kf13=\E[25~,
++	kf14=\E[26~,
++	kf15=\E[28~,
++	kf16=\E[29~,
++	kf17=\E[31~,
++	kf18=\E[32~,
++	kf19=\E[33~,
++	kf2=\E[12~,
++	kf20=\E[34~,
++	kf3=\E[13~,
++	kf4=\E[14~,
++	kf5=\E[15~,
++	kf6=\E[17~,
++	kf7=\E[18~,
++	kf8=\E[19~,
++	kf9=\E[20~,
++	kfnd=\E[1~,
++	khome=\E[7~,
++	kich1=\E[2~,
++	kmous=\E[M,
++	knp=\E[6~,
++	kpp=\E[5~,
++	kslt=\E[4~,
++	rc=\E8,
++	rev=\E[7m,
++	ri=\EM,
++	rmso=\E[27m,
++	rmul=\E[24m,
++	rs1=\Ec,
++	rs2=\E[r\E[m\E[?7;25h\E[?1;3;4;5;6;9;66;1000;1001;1049l\E[4l,
++	sgr0=\E[m\E(B,
++	enacs=,
++	smacs=\E(0,
++	rmacs=\E(B,
++	smso=\E[7m,
++	smul=\E[4m,
++	tbc=\E[3g,
++	vpa=\E[%i%p1%dd,
++	colors#88,
++	pairs#7744,
++	btns#5,
++	lm#0,
++	ccc,
++	npc,
++	mc5i,
++	ncv#0,
++	mir,
++	xon,
++	bw,
++	ech=\E[%p1%dX,
++	mc0=\E[i,
++	mc4=\E[4i,
++	mc5=\E[5i,
++	sitm=\E[3m,
++	ritm=\E[23m,
++	smam=\E[?7h,
++	rmam=\E[?7l,
++	smir=\E[4h,
++	rmir=\E[4l,
++	smcup=\E[?1049h,
++	rmcup=\E[r\E[?1049l,
++	smkx=\E=,
++	rmkx=\E>,
++	indn=\E[%p1%dS,
++	rin=\E[%p1%dT,
++	sgr=\E[0%?%p6%t;1%;%?%p2%t;4%;%?%p1%p3%|%t;7%;%?%p4%t;5%;%?%p7%t;8%;m%?%p9%t\E(0%e\E(B%;,
++	op=\E[39;49m,
++	setaf=\E[38;5;%p1%dm,
++	setab=\E[48;5;%p1%dm,
++	setf=%?%p1%{7}%>%t\E[38;5;%p1%dm%e\E[3%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m%;,
++	setb=%?%p1%{7}%>%t\E[48;5;%p1%dm%e\E[4%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m%;,
++	initc=\E]4;%p1%d;rgb\:%p2%{65535}%*%{1000}%/%4.4X/%p3%{65535}%*%{1000}%/%4.4X/%p4%{65535}%*%{1000}%/%4.4X\E\\,
++	sc=\E7,
++	s0ds=\E(B,
++	s1ds=\E(0,
++	s2ds=\E*B,
++	s3ds=\E+B,
++	u6=\E[%i%d;%dR,
++	u7=\E[6n,
++	u8=\E[?1;2c,
++	u9=\E[c,
++	tsl=\E]2;,
++	fsl=\007,
++	dsl=\E]2;\007,
++
++rxvt-unicode-256color|rxvt-unicode terminal with 256 colors (X Window System),
++	colors#256,
++	pairs#32767,
++	use=rxvt-unicode,
++
+ # mrxvt 0.5.4
+ #
+ # mrxvt is based on rxvt 2.7.11, but has by default XTERM_FKEYS defined, which
diff --git a/sys-libs/ncurses-compat/metadata.xml b/sys-libs/ncurses-compat/metadata.xml
new file mode 100644
index 000000000000..471b2667ab5b
--- /dev/null
+++ b/sys-libs/ncurses-compat/metadata.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+<maintainer type="project">
+	<email>base-system@gentoo.org</email>
+	<name>Gentoo Base System</name>
+</maintainer>
+<use>
+	<flag name="tinfo">
+		Build curses library (libncurses) sep from the low-level terminfo
+		library (libtinfo) -- usually needed only for binary packages -- but
+		it is binary compatible in either mode
+	</flag>
+</use>
+<upstream>
+	<remote-id type="cpe">cpe:/a:gnu:ncurses</remote-id>
+</upstream>
+</pkgmetadata>
diff --git a/sys-libs/ncurses-compat/ncurses-compat-5.9.ebuild b/sys-libs/ncurses-compat/ncurses-compat-5.9.ebuild
new file mode 100644
index 000000000000..936a384a044a
--- /dev/null
+++ b/sys-libs/ncurses-compat/ncurses-compat-5.9.ebuild
@@ -0,0 +1,199 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# This version is just for the ABI .5 library
+
+EAPI="5"
+
+inherit eutils toolchain-funcs multilib-minimal
+
+MY_PV=${PV:0:3}
+MY_P=ncurses-${MY_PV}
+DESCRIPTION="console display library"
+HOMEPAGE="https://www.gnu.org/software/ncurses/ https://invisible-island.net/ncurses/"
+SRC_URI="mirror://gnu/ncurses/${MY_P}.tar.gz"
+
+LICENSE="MIT"
+# The subslot reflects the SONAME.
+SLOT="5/5"
+KEYWORDS="alpha amd64 arm arm64 hppa ia64 m68k ~mips ppc ppc64 s390 sh sparc x86 ~amd64-fbsd ~x86-fbsd"
+IUSE="gpm tinfo unicode"
+
+DEPEND="gpm? ( sys-libs/gpm[${MULTILIB_USEDEP}] )"
+# Block the ncurses-5 that installs the same lib. #557472
+RDEPEND="${DEPEND}
+	!<sys-libs/ncurses-6:0
+	!sys-libs/ncurses:5"
+
+S=${WORKDIR}/${MY_P}
+
+PATCHES=(
+	"${FILESDIR}"/ncurses-5.8-gfbsd.patch
+	"${FILESDIR}"/ncurses-5.7-nongnu.patch
+	"${FILESDIR}"/ncurses-5.9-rxvt-unicode-9.15.patch #192083 #383871
+	"${FILESDIR}"/ncurses-5.9-fix-clang-build.patch #417763
+	"${FILESDIR}"/ncurses-5.9-pkg-config.patch
+	"${FILESDIR}"/ncurses-5.9-no-I-usr-include.patch #522586
+	"${FILESDIR}"/ncurses-5.9-gcc-5.patch #545114
+)
+
+src_prepare() {
+	epatch "${PATCHES[@]}"
+}
+
+src_configure() {
+	unset TERMINFO #115036
+	tc-export_build_env BUILD_{CC,CPP}
+	BUILD_CPPFLAGS+=" -D_GNU_SOURCE" #214642
+
+	# Build the various variants of ncurses -- narrow, wide, and threaded. #510440
+	# Order matters here -- we want unicode/thread versions to come last so that the
+	# binaries in /usr/bin support both wide and narrow.
+	# The naming is also important as we use these directly with filenames and when
+	# checking configure flags.
+	NCURSES_TARGETS=(
+		ncurses
+		$(usex unicode 'ncursesw' '')
+	)
+
+	# When installing ncurses, we have to use a compatible version of tic.
+	# This comes up when cross-compiling, doing multilib builds, upgrading,
+	# or installing for the first time.  Build a local copy of tic whenever
+	# the host version isn't available. #249363 #557598
+	if ! ROOT=/ has_version "~sys-libs/${P}" ; then
+		# We can't re-use the multilib BUILD_DIR because we run outside of it.
+		BUILD_DIR="${WORKDIR}" \
+		CHOST=${CBUILD} \
+		CFLAGS=${BUILD_CFLAGS} \
+		CXXFLAGS=${BUILD_CXXFLAGS} \
+		CPPFLAGS=${BUILD_CPPFLAGS} \
+		LDFLAGS="${BUILD_LDFLAGS} -static" \
+		do_configure cross --without-shared --with-normal
+	fi
+	multilib-minimal_src_configure
+}
+
+multilib_src_configure() {
+	local t
+	for t in "${NCURSES_TARGETS[@]}" ; do
+		do_configure "${t}"
+	done
+}
+
+do_configure() {
+	local target=$1
+	shift
+
+	mkdir "${BUILD_DIR}/${target}"
+	cd "${BUILD_DIR}/${target}" || die
+
+	local conf=(
+		# We need the basic terminfo files in /etc, bug #37026.  We will
+		# add '--with-terminfo-dirs' and then populate /etc/terminfo in
+		# src_install() ...
+		--with-terminfo-dirs="${EPREFIX}/etc/terminfo:${EPREFIX}/usr/share/terminfo"
+
+		# Now the rest of the various standard flags.
+		--without-hashed-db
+		--disable-pc-files
+		--with-shared
+		--without-hashed-db
+		--without-ada
+		--without-cxx
+		--without-cxx-binding
+		--without-debug
+		--without-profile
+		# The configure script uses ldd to parse the linked output which
+		# is flaky for cross-compiling/multilib/ldd versions/etc...
+		$(use_with gpm gpm libgpm.so.1)
+		--disable-termcap
+		--enable-symlinks
+		--with-rcs-ids
+		--with-manpage-format=normal
+		--enable-const
+		--enable-colorfgbg
+		--enable-echo
+		--disable-warnings
+		--without-assertions
+		--enable-leaks
+		--without-expanded
+		--with-macros
+		--without-progs
+		--without-tests
+		--without-trace
+		$(use_with tinfo termlib)
+
+		# The chtype/mmask-t settings below are to retain ABI compat
+		# with ncurses-5.4 so dont change em !
+		--with-chtype=long
+		--with-mmask-t=long
+		--disable-ext-colors
+		--disable-ext-mouse
+		--without-{pthread,reentrant}
+	)
+
+	if [[ ${target} == ncurses*w ]] ; then
+		conf+=( --enable-widec )
+	else
+		conf+=( --disable-widec )
+	fi
+	# Make sure each variant goes in a unique location.
+	if [[ ${target} != "ncurses" ]] ; then
+		conf+=( --includedir="${EPREFIX}"/usr/include/${target} )
+	fi
+	# See comments in src_configure.
+	if [[ ${target} != "cross" ]] ; then
+		local cross_path="${WORKDIR}/cross"
+		[[ -d ${cross_path} ]] && export TIC_PATH="${cross_path}/progs/tic"
+	else
+		conf+=( --with-progs )
+	fi
+
+	# Force bash until upstream rebuilds the configure script with a newer
+	# version of autotools. #545532
+	CONFIG_SHELL=/bin/bash \
+	ECONF_SOURCE=${S} \
+	econf "${conf[@]}" "$@"
+}
+
+src_compile() {
+	# See comments in src_configure.
+	if ! ROOT=/ has_version "~sys-libs/${P}" ; then
+		BUILD_DIR="${WORKDIR}" \
+		do_compile cross -C progs tic
+	fi
+
+	multilib-minimal_src_compile
+}
+
+multilib_src_compile() {
+	local t
+	for t in "${NCURSES_TARGETS[@]}" ; do
+		do_compile "${t}"
+	done
+}
+
+do_compile() {
+	local target=$1
+	shift
+
+	cd "${BUILD_DIR}/${target}" || die
+
+	# A little hack to fix parallel builds ... they break when
+	# generating sources so if we generate the sources first (in
+	# non-parallel), we can then build the rest of the package
+	# in parallel.  This is not really a perf hit since the source
+	# generation is quite small.
+	emake -j1 sources
+	emake "$@"
+}
+
+multilib_src_install() {
+	local target lib
+	for target in "${NCURSES_TARGETS[@]}" ; do
+		cd "${BUILD_DIR}/${target}/lib" || die
+		for lib in *5.9 ; do
+			newlib.so "${lib}" "${lib%%.9}"
+		done
+	done
+}