Some cleanup:

Changed the optimization value to -O3
Moved the (n)curses autoconf tests to the (n)curses driver section.
Removed commented commands in configure.in
Added define ACS_* test for curses driver

acconfig.h

@@ -28,6 +28,8 @@
 
 #undef DEBUG
 
+#undef DEFINED_ACS
+
 #undef GLK_DRV
 
 #undef HD44780_DRV

acinclude.m4

@@ -1,3 +1,23 @@
+dnl This test is used by the curses driver.
+dnl Checks if $1 defined the ACS_S* preprocessor macros.
+dnl Example: AC_CHECK_DEFINE_ACS(curses.h)
+AC_DEFUN(AC_CHECK_DEFINE_ACS, [
+	AC_MSG_CHECKING(if $1 defines ACS_S*)
+	AC_TRY_RUN([
+		#include <$1>
+		int main() {
+		[[char map[] = { ACS_S9, ACS_S7, ACS_S3, ACS_S1 };]]
+		return 0;
+		}
+	], [ 
+	dnl then
+		AC_DEFINE(DEFINED_ACS)
+		AC_MSG_RESULT(yes) ], [
+	dnl else
+		AC_MSG_RESULT(no) ],
+	[:])
+])
+
 AC_DEFUN(LCD_DRIVERS_SELECT, [
 AC_MSG_CHECKING(for which drivers to compile)
 
@@ -52,20 +72,35 @@ fi
 			actdrivers=["$actdrivers sli"]
 			;;
 		curses)
+			AC_CHECK_HEADERS(ncurses.h curses.h)
  			AC_CHECK_LIB(ncurses, main, 
- 				LIBCURSES="-lncurses"
+ 				AC_CHECK_HEADER(ncurses.h,
- 				DRIVERS="$DRIVERS curses_drv.o"
+ 					dnl We have ncurses.h and libncurses, add driver.
- 				AC_DEFINE(CURSES_DRV)
+ 					AC_CHECK_DEFINE_ACS(ncurses.h)
- 				actdrivers=["$actdrivers ncurses"]
+	 				LIBCURSES="-lncurses"
- 				,
-dnl				else
- 				AC_CHECK_LIB(curses, main, 
- 					LIBCURSES="-lcurses"
  					DRIVERS="$DRIVERS curses_drv.o"
  					AC_DEFINE(CURSES_DRV)
  					actdrivers=["$actdrivers curses"]
+ 				,
+dnl				else
+					AC_MSG_WARN([Could not find ncurses.h]),
+				)
+ 			,
+dnl			else
+ 				AC_CHECK_LIB(curses, main, 
+ 					AC_CHECK_HEADER(curses.h,
+ 						dnl We have curses.h and libcurses, add driver.
+ 						AC_CHECK_DEFINE_ACS(curses.h)
+ 						LIBCURSES="-lcurses"
+ 						DRIVERS="$DRIVERS curses_drv.o"
+ 						AC_DEFINE(CURSES_DRV)
+ 						actdrivers=["$actdrivers curses"]
  					,
 dnl					else
+						AC_MSG_WARN([Could not find curses.h]),
+					)
+ 				,
+dnl				else
  					AC_MSG_WARN([The curses driver needs the curses (or ncurses) library.]),
  				)
  			)
@@ -158,6 +193,8 @@ AC_SUBST(DRIVERS)
 ])
 
 
+
+
 dnl
 dnl Filesystem information detection
 dnl

configure.in

@@ -23,10 +23,11 @@ AC_ARG_ENABLE(debug,
 AC_MSG_RESULT($debug)
 
 if test $debug = "yes"; then
+dnl Enable debugging information
 	CFLAGS="-g"
 else
-dnl	CFLAGS="-Wno-unused -O6"
+dnl Maximum optimization
-	CFLAGS="-O6"
+	CFLAGS="-O3"
 fi
 CFLAGS="-Wall $CFLAGS"
 export CFLAGS
@@ -37,12 +38,6 @@ AC_PROG_CPP
 AC_PROG_INSTALL
 AC_PROG_RANLIB
 
-dnl Checks for libraries.
-dnl Replace `main' with a function in -lLCDstuff:
-dnl AC_CHECK_LIB(LCDstuff, main)
-dnl Replace `main' with a function in -lncurses:
-dnl AC_CHECK_LIB(ncurses, main)
-
 dnl Solaris
 AC_CHECK_FUNC(gethostbyname,,[AC_CHECK_LIB(nsl,gethostbyname)])
 AC_CHECK_FUNC(connect,,[AC_CHECK_LIB(socket,connect)])
@@ -74,7 +69,6 @@ dnl Checks for header files.
 AC_HEADER_DIRENT
 AC_HEADER_STDC
 AC_CHECK_HEADERS(fcntl.h sys/ioctl.h sys/time.h unistd.h)
-AC_CHECK_HEADERS(curses.h ncurses.h)
 
 dnl Check for particular preprocessor macros
 

server/drivers/curses_drv.c

@@ -454,9 +454,13 @@ curses_drv_num (int x, int num)
 void
 curses_drv_vbar (int x, int len)
 {
-	//char map[] = "_.,,ooO8";
-	char map[] = { ACS_S9, ACS_S9, ACS_S7, ACS_S7, ACS_S3, ACS_S3, ACS_S1, ACS_S1 };
 	int y;
+// Some curses.h do not define ACS_S* preprocessor macros, so we take a guess.
+#ifdef DEFINED_ACS
+	char map[] = { ACS_S9, ACS_S9, ACS_S7, ACS_S7, ACS_S3, ACS_S3, ACS_S1, ACS_S1 };
+#else
+	char map[] = "_.,,ooO8";
+#endif
 	
 	ValidX(x);