diff -Nru a2ps-4.15.6_copy/configure.ac a2ps-4.15.6/configure.ac
--- a2ps-4.15.6_copy/configure.ac	2025-03-03 15:19:48.757702690 +0800
+++ a2ps-4.15.6/configure.ac	2025-03-03 15:58:57.039982247 +0800
@@ -116,6 +116,8 @@
 AS_IF([test "$ac_cv_lib_paper_systempapername" = "no" || test "$ac_cv_header_paper_h" = "no"],
   [AC_MSG_ERROR([a2ps needs libpaper to work])])
 
+AC_CHECK_FUNCS(mempcpy)
+
 # Internationalization.
 AM_GNU_GETTEXT_VERSION([0.20.2])
 AM_GNU_GETTEXT([external], [need-ngettext])