diff -r aebbdf937322 -r 9803496ddf72 sys-libs/ncurses-compat/files/ncurses-6.0-cppflags-cross.patch
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sys-libs/ncurses-compat/files/ncurses-6.0-cppflags-cross.patch	Fri Feb 19 15:12:30 2021 +0000
@@ -0,0 +1,35 @@
+https://bugs.gentoo.org/601426
+https://lists.gnu.org/archive/html/bug-ncurses/2015-02/msg00012.html
+
+From: John Vogel
+Subject: [PATCH] c++ binding missed when cross compiling
+Date: Mon, 16 Feb 2015 01:01:48 -0500
+
+The configure script hard codes the include dir to the prefix'ed include dir,
+when checking if c++ compiler works. This breaks the compiler's built-in search
+path. I've included two patches. The first works on the configure.in file, which
+requires your autoconf stuff to test and I'm not ready to meddle with at the
+moment. The other works directly on the configure file. I've tested the second
+one; it should mirror what the first patch tries to achieve and works for me.
+
+--- a/configure
++++ b/configure
+@@ -2938,10 +2938,6 @@
+ 		echo "$as_me:2938: checking if $CXX works" >&5
+ echo $ECHO_N "checking if $CXX works... $ECHO_C" >&6
+ 
+-		save_CPPFLAGS="$CPPFLAGS"
+-		eval cf_includedir=${includedir}
+-		CPPFLAGS="$CPPFLAGS -I${cf_includedir}"
+-
+ cat >conftest.$ac_ext <<_ACEOF
+ #line 2946 "configure"
+ #include "confdefs.h"
+@@ -2978,7 +2974,6 @@
+ cf_cxx_works=no
+ fi
+ rm -f conftest.$ac_objext conftest.$ac_ext
+-		CPPFLAGS="$save_CPPFLAGS"
+ 
+ 		echo "$as_me:2983: result: $cf_cxx_works" >&5
+ echo "${ECHO_T}$cf_cxx_works" >&6