$OpenBSD: patch-configure_in,v 1.2 2019/05/10 21:13:28 jca Exp $
Index: configure.in
--- configure.in.orig
+++ configure.in
@@ -14,9 +14,9 @@ AC_PREFIX_DEFAULT(/usr/local/rtg)
 
 dnl Define auxiliary libraries
 CGI_LIB_DIR=cgilib-0.4
-GD_LIB_DIR=gd-1.8.4
-PNG_LIB_DIR=libpng-1.2.1
-ZLIB_LIB_DIR=zlib-1.1.4
+GD_LIB_DIR=$LOCALBASE
+PNG_LIB_DIR=$LOCALBASE
+ZLIB_LIB_DIR=/usr
 
 dnl Compilation Setup
 AC_ARG_WITH(mysql,
@@ -143,7 +143,7 @@ fi
 LDFLAGS="-L$MYSQL_LIB_DIR $LDFLAGS"
 CFLAGS="-I$MYSQL_INC_DIR $CFLAGS"
 
-AC_CHECK_LIB(mysqlclient_r, my_thread_init,
+AC_CHECK_LIB(mysqlclient_r, mysql_thread_init,
        LIBS="-lmysqlclient_r $LIBS",
        AC_MSG_ERROR(Cannot link with thread-safe MySQL lib (libmysqlclient_r)))
 
@@ -221,6 +221,14 @@ if test "$OLD_UCD_SNMP" = "yes"; then
        AC_MSG_ERROR(Cannot find UCD-SNMP libraries(snmp)))
 fi
 dnl ****************** End SNMP checking ***********************
+
+AC_CHECK_LIB(gd, gdImageDestroy,
+       [ LIBS="`$LOCALBASE/bin/gdlib-config --ldflags` `$LOCALBASE/bin/gdlib-config --libs` -lgd $LIBS" ],
+       AC_MSG_ERROR(Cannot find GD))
+
+AC_CHECK_LIB(png, png_free,
+       [ LIBS="`$LOCALBASE/bin/libpng-config --ldflags` $LIBS"],
+       AC_MSG_ERROR(Cannot find libpng))
 
 
 AC_OUTPUT(Makefile                         \
