Set warnings as errors.

Const correct massaging to lose the couple warnings that were there.

ChangeLog

@@ -1,3 +1,16 @@
+2017-09-30  Michael Small  <smallm@sdf.org>
+
+	* src/Makefile.am (AM_CFLAGS): warnings as errors.
+	* src/menus.c (ExecuteFunction): ptr as const char* to prevent const
+	qualifier discard warnings when passed const char* action.
+	* src/util.c (ExpandFilename): use const char* for arg and return value.
+	(FindBitmap): cast return val of ExpandFilename to char* for bigname.
+	Should be harmless since it's used as constant data up to it being
+	assigned something else.
+	(GetFont): Similar case here but without ExpandFilename being involved.
+	* src/screen.h (ScreenInfo): IconDirectory can be const char* too,
+	avoiding warning in parse.c:771.
+
 2017-09-27  Michael Small  <smallm@sdf.org>
 
 	Preliminaries:

src/Makefile.am

@@ -32,7 +32,7 @@ AM_CPPFLAGS =							\
 	-DXORG_RELEASE=\"Release\ $(VERSION)\"			\
 	-DSYSTEM_INIT_FILE=\"${datadir}/X11/twmruined/system.twmruinedrc\"
 
-AM_CFLAGS = $(TWM_CFLAGS)
+AM_CFLAGS = -Werror $(TWM_CFLAGS)
 twmruined_LDADD = $(TWM_LIBS)
 
 twmruined_SOURCES =		\

src/Makefile.in

@@ -366,7 +366,7 @@ AM_CPPFLAGS = \
 	-DXORG_RELEASE=\"Release\ $(VERSION)\"			\
 	-DSYSTEM_INIT_FILE=\"${datadir}/X11/twmruined/system.twmruinedrc\"
 
-AM_CFLAGS = $(TWM_CFLAGS)
+AM_CFLAGS = -Werror $(TWM_CFLAGS)
 twmruined_LDADD = $(TWM_LIBS)
 twmruined_SOURCES = \
         add_window.c	\

src/menus.c

@@ -1293,7 +1293,7 @@ ExecuteFunction(int func, const char *action, Window w, TwmWindow *tmp_win,
 {
     static Time last_time = 0;
     char tmp[200];
-    char *ptr;
+    const char *ptr;
     char buff[MAX_FILE_SIZE];
     int count, fd;
     Window rootw;
@@ -2007,7 +2007,7 @@ ExecuteFunction(int func, const char *action, Window w, TwmWindow *tmp_win,
 	ptr = XFetchBytes(dpy, &count);
 	if (ptr) {
 	    if (sscanf(ptr, "%s", tmp) == 1) {
-		XFree (ptr);
+		 XFree((void*)ptr);
 		ptr = ExpandFilename(tmp);
 		if (ptr) {
 		    fd = open(ptr, O_RDONLY);
@@ -2020,10 +2020,10 @@ ExecuteFunction(int func, const char *action, Window w, TwmWindow *tmp_win,
 				"%s:  unable to open cut file \"%s\"\n",
 				ProgramName, tmp);
 		    }
-		    if (ptr != tmp) free (ptr);
+		    if (ptr != tmp) free((void*)ptr);
 		}
 	    } else {
-		XFree(ptr);
+		 XFree((void*)ptr);
 	    }
 	} else {
 	    fprintf(stderr, "%s:  cut buffer is empty\n", ProgramName);
@@ -2185,7 +2185,7 @@ ExecuteFunction(int func, const char *action, Window w, TwmWindow *tmp_win,
 	    fprintf (stderr, "%s:  unable to open file \"%s\"\n",
 		     ProgramName, ptr);
 	}
-	if (ptr != action) free(ptr);
+	if (ptr != action) free((void*)ptr);
 	break;
 
     case F_REFRESH:

src/screen.h

@@ -195,7 +195,7 @@ typedef struct ScreenInfo
     IconMgr iconmgr;		/* default icon manager */
     struct IconRegion *FirstRegion;	/* pointer to icon regions */
     struct IconRegion *LastRegion;	/* pointer to the last icon region */
-    char *IconDirectory;	/* icon directory to search */
+    const char *IconDirectory;	/* icon directory to search */
     int SizeStringOffset;	/* x offset in size window for drawing */
     int SizeStringWidth;	/* minimum width of size window */
     int BorderWidth;		/* border width of twm windows */

src/util.c

@@ -255,8 +255,8 @@ Zoom(Window wf, Window wt)
  *
  *  \param name  the filename to expand
  */
-char *
+const char *
-ExpandFilename(char *name)
+ExpandFilename(const char *name)
 {
     char *newname;
 
@@ -341,7 +341,7 @@ FindBitmap (const char *name, unsigned *widthp, unsigned *heightp)
      * are used.  If the bigname is different from name, bigname will need to
      * be freed.
      */
-    bigname = ExpandFilename (name);
+    bigname = (char*)ExpandFilename(name);
     if (!bigname) return None;
 
     /*
@@ -598,7 +598,7 @@ GetFont(MyFont *font)
 
 	basename2 = malloc(strlen(font->name) + 3);
 	if (basename2) sprintf(basename2, "%s,*", font->name);
-	else basename2 = font->name;
+	else basename2 = (char*)font->name;
 	if( (font->fontset = XCreateFontSet(dpy, basename2,
 					    &missing_charset_list_return,
 					    &missing_charset_count_return,

src/util.h

@@ -64,7 +64,7 @@ in this Software without prior written authorization from The Open Group.
 extern void MoveOutline ( Window root, int x, int y, int width, int height,
 			  int bw, int th );
 extern void Zoom ( Window wf, Window wt );
-extern char * ExpandFilename ( char *name );
+extern const char * ExpandFilename ( const char *name );
 extern void GetUnknownIcon ( const char *name );
 extern Pixmap FindBitmap ( const char *name, unsigned int *widthp,
 			   unsigned int *heightp );