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* [PATCH] kconfig: fix line number in recursive inclusion error message
@ 2018-03-02  7:05 Masahiro Yamada
  2018-03-02  9:43 ` Ulf Magnusson
  2018-03-03 15:34 ` Masahiro Yamada
  0 siblings, 2 replies; 3+ messages in thread
From: Masahiro Yamada @ 2018-03-02  7:05 UTC (permalink / raw)
  To: linux-kbuild
  Cc: Sam Ravnborg, Ulf Magnusson, Randy Dunlap, Masahiro Yamada, linux-kernel

When recursive inclusion is detected, the line number of the last
'included from:' is wrong.

[Test Case]

Kconfig:
  -------->8--------
  source "Kconfig2"
  -------->8--------

Kconfig2:
  -------->8--------
  source "Kconfig3"
  -------->8--------

Kconfig3:
  -------->8--------
  source "Kconfig"
  -------->8--------

[Result]

  $ make allyesconfig
  scripts/kconfig/conf  --allyesconfig Kconfig
  Kconfig:1: recursive inclusion detected. Inclusion path:
    current file : 'Kconfig'
    included from: 'Kconfig3:1'
    included from: 'Kconfig2:1'
    included from: 'Kconfig:3'
  scripts/kconfig/Makefile:89: recipe for target 'allyesconfig' failed
  make[1]: *** [allyesconfig] Error 1
  Makefile:512: recipe for target 'allyesconfig' failed
  make: *** [allyesconfig] Error 2

where we expect

    current file : 'Kconfig'
    included from: 'Kconfig3:1'
    included from: 'Kconfig2:1'
    included from: 'Kconfig:1'

The 'iter->lineno+1' in the second fpinrtf() should be 'iter->lineno-1'.
I refactored the code to merge two fprintf().

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

 scripts/kconfig/zconf.l | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l
index 02de6fe..88b650e 100644
--- a/scripts/kconfig/zconf.l
+++ b/scripts/kconfig/zconf.l
@@ -332,16 +332,12 @@ void zconf_nextfile(const char *name)
 				"Inclusion path:\n  current file : '%s'\n",
 				zconf_curname(), zconf_lineno(),
 				zconf_curname());
-			iter = current_file->parent;
-			while (iter && \
-			       strcmp(iter->name,current_file->name)) {
-				fprintf(stderr, "  included from: '%s:%d'\n",
-					iter->name, iter->lineno-1);
+			iter = current_file;
+			do {
 				iter = iter->parent;
-			}
-			if (iter)
 				fprintf(stderr, "  included from: '%s:%d'\n",
-					iter->name, iter->lineno+1);
+					iter->name, iter->lineno - 1);
+			} while (strcmp(iter->name, current_file->name));
 			exit(1);
 		}
 	}
-- 
2.7.4

^ permalink raw reply related	[flat|nested] 3+ messages in thread

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2018-03-02  7:05 [PATCH] kconfig: fix line number in recursive inclusion error message Masahiro Yamada
2018-03-02  9:43 ` Ulf Magnusson
2018-03-03 15:34 ` Masahiro Yamada

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