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parse-datetime: Make the build rule work with parallel 'make'.

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Reported by Daiki Ueno <ueno@gnu.org> in
<https://lists.gnu.org/archive/html/bug-gnulib/2020-09/msg00036.html>.

* modules/parse-datetime (Makefile.am): Use a phony target and the
general idiom for rules that produce multiple files.
This commit is contained in:
Bruno Haible
2020-09-13 22:03:16 +02:00
parent 1e737bb51f
commit 8002ca7b56
2 changed files with 19 additions and 1 deletions
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8
ChangeLog
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@@ -1,3 +1,11 @@
2020-09-13 Bruno Haible <bruno@clisp.org>
parse-datetime: Make the build rule work with parallel 'make'.
Reported by Daiki Ueno <ueno@gnu.org> in
<https://lists.gnu.org/archive/html/bug-gnulib/2020-09/msg00036.html>.
* modules/parse-datetime (Makefile.am): Use a phony target and the
general idiom for rules that produce multiple files.
2020-09-13 Ben Pfaff <blp@cs.stanford.edu>
getpass: Check for nonnull prompt argument while avoiding warnings.

12
modules/parse-datetime
View File

@@ -43,7 +43,10 @@ Makefile.am:
# Additionally, here we assume GNU Bison and therefore don't need the ylwrap
# script.
# Therefore we override this rule.
parse-datetime.c: parse-datetime.y
# Since this is a rule that produces multiple files, we apply the idiom from
# <https://lists.gnu.org/archive/html/bug-make/2020-09/msg00008.html>, so that
# it works also in parallel 'make'.
generate-parse-datetime:
$(AM_V_YACC)$(PARSE_DATETIME_BISON) -d $(YFLAGS) $(AM_YFLAGS) $(srcdir)/parse-datetime.y \
&& test ':' = '$(PARSE_DATETIME_BISON)' || { \
sed -e 's|".*/parse-datetime\.y"|"parse-datetime.y"|' \
@@ -57,6 +60,13 @@ parse-datetime.c: parse-datetime.y
&& mv parse-datetime.c-tmp $(srcdir)/parse-datetime.c \
&& mv parse-datetime-gen.h-tmp $(srcdir)/parse-datetime-gen.h; \
}
.PHONY: generate-parse-datetime
# The above rule will generate files with time stamp order
# parse-datetime.y <= parse-datetime.c <= parse-datetime-gen.h.
parse-datetime.c: parse-datetime.y
@{ test -f $(srcdir)/parse-datetime.c && test ! $(srcdir)/parse-datetime.c -ot $(srcdir)/parse-datetime.y; } || $(MAKE) generate-parse-datetime
parse-datetime-gen.h: parse-datetime.c
@{ test -f $(srcdir)/parse-datetime-gen.h && test ! $(srcdir)/parse-datetime-gen.h -ot $(srcdir)/parse-datetime.c; } || $(MAKE) generate-parse-datetime
lib_SOURCES += parse-datetime.y
BUILT_SOURCES += parse-datetime.c parse-datetime-gen.h
MOSTLYCLEANFILES += parse-datetime.tab.c parse-datetime.tab.h parse-datetime.c-tmp parse-datetime-gen.h-tmp