Author: ngie
Date: Mon Nov 23 09:15:20 2015
New Revision: 291180
URL: https://svnweb.freebsd.org/changeset/base/291180

Log:
  Fix up convert.c generation
  
  - Use a temporary file for convert.c to reduce likelihood of an interrupted
    build resulting in bad code being written to convert.c
  - Truncate the file instead of appending to it to ensure that the file being
    touched will not result in duplicate declarations/definitions from
    kern_acct.c if/when kern_acct.c changes.
  
  MFC after: 1 week

Modified:
  head/tests/sys/kern/acct/Makefile

Modified: head/tests/sys/kern/acct/Makefile
==============================================================================
--- head/tests/sys/kern/acct/Makefile   Mon Nov 23 08:52:38 2015        
(r291179)
+++ head/tests/sys/kern/acct/Makefile   Mon Nov 23 09:15:20 2015        
(r291180)
@@ -6,12 +6,13 @@ ATF_TESTS_C=  acct_test
 
 CFLAGS+=       -I${.OBJDIR}
 
-CLEANFILES+=   convert.c
+CLEANFILES+=   convert.c convert.c.tmp
 
 DPSRCS.acct_test=      convert.c
 
 convert.c: ${SRCTOP}/sys/kern/kern_acct.c
        sed -n -e 's/log(/syslog(/g' \
-              -e '/FLOAT_CONVERSION_START/,/FLOAT_CONVERSION_END/p' ${.ALLSRC} 
>>${.TARGET}
+              -e '/FLOAT_CONVERSION_START/,/FLOAT_CONVERSION_END/p' ${.ALLSRC} 
>${.TARGET}.tmp
+       mv ${.TARGET}.tmp ${.TARGET}
 
 .include <bsd.test.mk>
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