--- /var/db/portage/local/sys-libs/ncurses/ncurses-6.4_p20230401.ebuild	2023-05-13 10:31:51.314898367 +0200
+++ /var/db/portage/gentoo/sys-libs/ncurses/ncurses-6.4_p20230401.ebuild	2023-05-13 10:04:39.442342312 +0200
@@ -149,6 +149,11 @@
 	# bug #214642
 	BUILD_CPPFLAGS+=" -D_GNU_SOURCE"
 
+	# bug #852665
+	if [[ ${CHOST} == *-cygwin* ]]; then
+		BUILD_CPPFLAGS+=" -DBUILDING_NCURSES"
+	fi
+
 	# 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.
@@ -177,7 +182,7 @@
 		echo "int main() {}" | \
 			$(tc-getCC) -o x -x c - ${lbuildflags} -pipe >& /dev/null \
 			|| lbuildflags="${dbuildflags}"
-		lbuildflags=""
+
 		# We can't re-use the multilib BUILD_DIR because we run outside of it.
 		BUILD_DIR="${WORKDIR}" \
 		CC=${BUILD_CC} \
@@ -294,17 +299,7 @@
 src_compile() {
 	# See comments in src_configure.
 	if ! has_version -b "~sys-libs/${P}:0" ; then
-		# We could possibly merge these two branches but opting to be
-		# conservative when merging some of the Prefix changes.
-
-		if [[ ${CHOST} == *-cygwin* ]] && ! multilib_is_native_abi ; then
-			# We make 'tic$(x)' here, for Cygwin having x=".exe".
-			BUILD_DIR="${WORKDIR}" \
-				 do_compile cross -C progs all PROGS='tic$(x)'
-		else
-			BUILD_DIR="${WORKDIR}" \
-				 do_compile cross -C progs tic
-		fi
+		BUILD_DIR="${WORKDIR}" do_compile cross -C progs tic$(get_exeext)
 	fi
 
 	multilib-minimal_src_compile