Add support for per-job output sync.

A new flag to the -O/--output-sync, "job", selects a per-job (that is, per
line of a recipe) output synchronization.  To support this move the close of
the temp file out of the sync_output() function and don't do it until we free
the child, since we may call sync_output() multiple times in a given recipe.
When we set up for a new temp file, if we're in per-job mode we truncate the
file and seek to the beginning to re-use it for every job.

1 files changed, 4 insertions, 2 deletions

diff --git a/makeint.h b/makeint.h
index d1b00c6..643b611 100644
--- a/makeint.h
+++ b/makeint.h
@@ -538,8 +538,10 @@ int strncasecmp (const char *s1, const char *s2, int n);
 # define OUTPUT_SYNC
 #endif
 
-#define OUTPUT_SYNC_TARGET 1
-#define OUTPUT_SYNC_MAKE 2
+#define OUTPUT_SYNC_NONE   0
+#define OUTPUT_SYNC_JOB    1
+#define OUTPUT_SYNC_TARGET 2
+#define OUTPUT_SYNC_MAKE   3
 
 extern const gmk_floc *reading_file;
 extern const gmk_floc **expanding_var;