diff '--color=auto' -ruN ncurses-6.4.orig/aclocal.m4 ncurses-6.4/aclocal.m4
--- ncurses-6.4.orig/aclocal.m4	2024-08-29 20:47:34.978057133 +0000
+++ ncurses-6.4/aclocal.m4	2024-08-29 20:48:57.809473044 +0000
@@ -10139,7 +10139,7 @@
 	cf_xopen_source="-D_SGI_SOURCE"
 	cf_XOPEN_SOURCE=
 	;;
-(linux*gnu|linux*gnuabi64|linux*gnuabin32|linux*gnueabi|linux*gnueabihf|linux*gnux32|uclinux*|gnu*|mint*|k*bsd*-gnu|cygwin|msys|mingw*|linux*uclibc)
+(linux*gnu*|uclinux*|gnu*|mint*|k*bsd*-gnu|cygwin|msys|mingw*|linux*uclibc)
 	CF_GNU_SOURCE($cf_XOPEN_SOURCE)
 	;;
 (minix*)