Use portable method to obtain hg id's output.

diff --git a/src/Makefile.am b/src/Makefile.am
index 3737088bd8ff10681acf1823478574e8148afdb8..97803a9ac321c31f829836456f70eb119ade16cc 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -48,13 +48,16 @@ EXTRA_wget_SOURCES = mswindows.c
 LDADD = $(ALLOCA) $(LIBOBJS)
 
 # version.c's not really _phony_, but it does need to be generated each run.
-HG_ID = $(shell hg id 2>/dev/null | cut -f 1 -d ' ')
 .PHONY: version.c
-version.c:
+version.c: hg-id
        printf '%s' 'const char *version_string = "@VERSION@' > $@
-       -[ "$(HG_ID)" ] && printf '%s' ' ($(HG_ID))' >> $@
+       -HG_ID=$$(cat hg-id); [ "$$HG_ID" ] && printf '%s' " ($${HG_ID})" >> $@
        printf '%s\n' '";' >> $@
 
+.INTERMEDIATE: hg-id
+hg-id:
+       -( hg id | cut -f 1 -d ' ' ) 2>/dev/null > $@
+
 check_LIBRARIES = libunittest.a
 libunittest_a_SOURCES = $(wget_SOURCES) test.c test.h
 libunittest_a_CPPFLAGS = -DTESTING