--- fwmaker/configure.in	2026/01/04 18:08:18	1.1
+++ fwmaker/configure.in	2026/01/04 18:18:53	1.2
@@ -2,6 +2,9 @@ AC_INIT(fwmaker, 1.0, misho@elwix.org)
 AC_CONFIG_HEADERS([inc/config.h])
 AC_CONFIG_SRCDIR([src/fwmaker.c])
 
+ac_cv_func_malloc_0_nonnull="yes"
+ac_cv_func_realloc_0_nonnull="yes"
+
 # Checks for programs.
 AC_PROG_CC
 AC_PROG_INSTALL
@@ -12,9 +15,12 @@ AC_CANONICAL_TARGET
 AC_CHECK_TOOL(MKDEP, mkdep, ../mkdep)
 AC_SUBST(MKDEP)
 
+CFLAGS="${CFLAGS:=-I/usr/local/include} -Wall -O2 -fPIC"
+LDFLAGS="${LDFLAGS:=-L/usr/local/lib}"
+
 # Checks for libraries.
-AC_CHECK_LIB([aitcli], [cliInputLine])
-AC_CHECK_LIB([elwix], [elwix_GetError])
+AC_CHECK_LIB([aitcli], [cli_addCommand])
+AC_CHECK_LIB([elwix], [e_free])
 
 # Checks for header files.
 AC_CHECK_HEADERS([fcntl.h unistd.h])