Discuss the build tool Jam with other users

headers Hubert Mackenberg | 3 Jan 2008 09:21

Hi,

it seems there is a bug in Jam regarding cyclic header files:
If have have cyclic header files then a .c file depending
on any of these header file is not recompiled under certain
conditions. A simple example is given below.

The problem seems to be present in all Jam versions.
Does anyone have an idea how to fix it?

Thanks a lot,
Hubert

---

Eaxmple:

In this example a.c includes a.h, a.h includes b.h and
b.h includes c.h. But a.c is not recompiled if c.h is updated.

To get the example running you need 5 files a.c, b.c, a.h,
b.h and c.h. You may create them using:

   echo "this is a.c" > a.c
   echo "this is b.c" > b.c
   echo "this is a.h" > a.h
   echo "this is b.h" > b.h
   echo "this is c.h" > c.h

Then use the 'test.jam' file added below and run

Mon	Tue	Wed	Thu	Fri	Sat	Sun

	1	2	3	4	5	6
7	8	9	10	11	12	13
14	15	16	17	18	19	20
21	22	23	24	25	26	27
28	29	30	31

5	October 2012
10	September 2012
1	June 2012
3	July 2011
19	June 2011
13	May 2011
3	March 2011
4	February 2011
4	December 2010
3	November 2010
2	October 2010
9	April 2010
1	January 2010
4	November 2009
3	October 2009
19	September 2009
15	August 2009
7	June 2009
12	May 2009
31	April 2009
15	January 2009
34	December 2008
1	November 2008
8	October 2008
12	September 2008
8	August 2008
6	June 2008
5	February 2008
2	January 2008
5	December 2007
5	November 2007
1	September 2007
22	August 2007
18	July 2007
4	June 2007
17	May 2007
2	April 2007
47	March 2007
6	February 2007
9	January 2007
1	December 2006
2	November 2006
2	October 2006
4	September 2006
15	August 2006
7	July 2006
12	June 2006
11	May 2006
3	April 2006
4	March 2006
2	February 2006
3	January 2006
2	December 2005
3	November 2005
1	September 2005
1	June 2005
1	April 2005
4	January 2005
10	December 2004
13	November 2004
11	October 2004
9	September 2004
9	August 2004
5	July 2004
10	June 2004
29	May 2004
22	April 2004
1	March 2004
17	February 2004
34	January 2004
15	December 2003
19	November 2003
36	October 2003
57	September 2003
10	August 2003
11	July 2003
12	June 2003
15	May 2003
42	April 2003
31	March 2003
87	February 2003
68	January 2003
38	December 2002
35	November 2002
21	October 2002
14	September 2002
7	August 2002
16	July 2002
12	June 2002
31	May 2002
37	April 2002
40	March 2002
40	February 2002
57	January 2002
43	December 2001
54	November 2001
12	October 2001
14	September 2001
61	August 2001
37	July 2001
88	June 2001
39	May 2001
14	April 2001
24	March 2001
12	February 2001
28	January 2001
2	December 2000
5	November 2000
6	October 2000
37	September 2000
18	August 2000
38	July 2000
14	June 2000
20	May 2000
27	April 2000
41	March 2000
33	February 2000
7	January 2000
8	December 1999
8	November 1999
7	October 1999
26	September 1999
35	August 1999
2	July 1999

Jam bug regarding cyclic header files

Re: Jam bug regarding cyclic header files