Avoid a possible race condition where a parallel make might

attempt to update git_version.h and lib/Config_git.pl in
concurrent processes.

diff --git a/Makefile.SH b/Makefile.SH
index 1a22205..97df05a 100644 (file)
--- a/Makefile.SH
+++ b/Makefile.SH
@@ -559,7 +559,11 @@ all: $(FIRSTMAKEFILE) $(MINIPERL_EXE) miniperl $(generated_pods) $(private) $(un
 
 .PHONY: all translators utilities
 
-lib/Config_git.pl git_version.h: $(MINIPERL_EXE) make_patchnum.pl
+# Both git_version.h and lib/Config_git.pl are built
+# by make_patchnum.pl.
+git_version.h: lib/Config_git.pl
+
+lib/Config_git.pl: $(MINIPERL_EXE) make_patchnum.pl
        $(MINIPERL) make_patchnum.pl
 
 # make sure that we recompile perl.c if the git version changes