4 files changed, 33 insertions, 2 deletions

diff --git a/scripts/kconfig/expr.c b/scripts/kconfig/expr.c
index edd3f39a080a..d83f2322893a 100644
--- a/scripts/kconfig/expr.c
+++ b/scripts/kconfig/expr.c
@@ -1097,9 +1097,32 @@ void expr_fprint(struct expr *e, FILE *out)
 
 static void expr_print_gstr_helper(void *data, struct symbol *sym, const char *str)
 {
-        str_append((struct gstr*)data, str);
+        struct gstr *gs = (struct gstr*)data;
+        const char *sym_str = NULL;
+
+        if (sym)
+                sym_str = sym_get_string_value(sym);
+
+        if (gs->max_width) {
+                unsigned extra_length = strlen(str);
+                const char *last_cr = strrchr(gs->s, '\n');
+                unsigned last_line_length;
+
+                if (sym_str)
+                        extra_length += 4 + strlen(sym_str);
+
+                if (!last_cr)
+                        last_cr = gs->s;
+
+                last_line_length = strlen(gs->s) - (last_cr - gs->s);
+
+                if ((last_line_length + extra_length) > gs->max_width)
+                        str_append(gs, "\\\n");
+        }
+
+        str_append(gs, str);
         if (sym)
-                str_printf((struct gstr*)data, " [=%s]", sym_get_string_value(sym));
+                str_printf(gs, " [=%s]", sym_str);
 }
 
 void expr_gstr_print(struct expr *e, struct gstr *gs)
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index f379b0bf8c9e..e59dd0c5787a 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -106,6 +106,11 @@ int file_write_dep(const char *name);
 struct gstr {
         size_t len;
         char  *s;
+        /*
+        * when max_width is not zero long lines in string s (if any) get
+        * wrapped not to exceed the max_width value
+        */
+        int max_width;
 };
 struct gstr str_new(void);
 struct gstr str_assign(const char *s);
diff --git a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
index 8413cf38ed27..ac1e9dacde97 100644
--- a/scripts/kconfig/mconf.c
+++ b/scripts/kconfig/mconf.c
@@ -638,6 +638,7 @@ static void show_help(struct menu *menu)
 {
         struct gstr help = str_new();
 
+        help.max_width = getmaxx(stdscr) - 10;
         menu_get_ext_help(menu, &help);
 
         show_helptext(_(menu_get_prompt(menu)), str_get(&help));
diff --git a/scripts/kconfig/util.c b/scripts/kconfig/util.c
index b6b2a46af14c..81c100d953ef 100644
--- a/scripts/kconfig/util.c
+++ b/scripts/kconfig/util.c
@@ -78,6 +78,7 @@ struct gstr str_new(void)
         struct gstr gs;
         gs.s = malloc(sizeof(char) * 64);
         gs.len = 64;
+        gs.max_width = 0;
         strcpy(gs.s, "\0");
         return gs;
 }
@@ -88,6 +89,7 @@ struct gstr str_assign(const char *s)
         struct gstr gs;
         gs.s = strdup(s);
         gs.len = strlen(s) + 1;
+        gs.max_width = 0;
         return gs;
 }