use -Wno-unused-parameter, and add missing $(EXEEXT) to Makefile.am

ChangeLog

@@ -1,3 +1,10 @@
+2010-08-07  Robert Larice
+ * configure.in :
+    for gcc, don't report `unused parameter' Warnings
+ * src/Makefile.am
+    (bug tracker ID: 3019263)
+    add missing $(EXEEXT) for cygwin, thank you marco atzeri
+
 2010-08-06 Dietmar Warning
  * spicelib/parser/inp2q.c: add prototype for controlled_exit
  * frontend/com_measure2.c, inp.c, inpcom.c, vectors.c: fallback for not handled enumeration values in switch

configure.in

@@ -212,7 +212,7 @@ dnl the above AC_PROG_CC may set CFLAGS to "-O2 -g"
 if test "$enable_debug" = "no"; then
 	if test "x$GCC" = "xyes"; then
 		AC_MSG_WARN(Removing debugging option!)
-		CFLAGS="$ext_CFLAGS -O2 -Wall -s"
+		CFLAGS="$ext_CFLAGS -O2 -Wall -Wno-unused-parameter -s"
 	else
 		AC_MSG_WARN(Removing debugging option!)
 		CFLAGS="$ext_CFLAGS -O2"
@@ -220,7 +220,7 @@ if test "$enable_debug" = "no"; then
 else
     AC_DEFINE(NGDEBUG,1,[Compile with debug info])
 	if test "x$GCC" = "xyes"; then
-		CFLAGS="$ext_CFLAGS -g -O0 -Wall"
+		CFLAGS="$ext_CFLAGS -g -O0 -Wall -Wno-unused-parameter"
 	else
 		CFLAGS="$ext_CFLAGS -g"
 	fi

src/Makefile.am

@@ -219,8 +219,8 @@ ngmakeidx_SOURCES = makeidx.c
 
 ## create index for online help:
 
-ngspice.idx: ngmakeidx
-	./ngmakeidx $(srcdir)/ngspice.txt
+ngspice.idx: ngmakeidx$(EXEEXT)
+	./ngmakeidx$(EXEEXT) $(srcdir)/ngspice.txt
 
 endif !WINDOWS