date: recognize bogus FreeBSD gmtime output

diff --git a/Makefile b/Makefile
index 598d6313da96f8ba8f76fbd982f491077b6d5d97..da7013b1bcd3a137b42ad3fc5c42ada03e1ab8b6 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -342,6 +342,9 @@ all::
 # Define DEFAULT_HELP_FORMAT to "man", "info" or "html"
 # (defaults to "man") if you want to have a different default when
 # "git help" is called without a parameter specifying the format.
+#
+# Define GMTIME_UNRELIABLE_ERRORS if your gmtime() function does not
+# return NULL when it receives a bogus time_t.
 
 GIT-VERSION-FILE: FORCE
        @$(SHELL_PATH) ./GIT-VERSION-GEN
@@ -1464,6 +1467,11 @@ ifneq (,$(XDL_FAST_HASH))
        BASIC_CFLAGS += -DXDL_FAST_HASH
 endif
 
+ifdef GMTIME_UNRELIABLE_ERRORS
+       COMPAT_OBJS += compat/gmtime.o
+       BASIC_CFLAGS += -DGMTIME_UNRELIABLE_ERRORS
+endif
+
 ifeq ($(TCLTK_PATH),)
 NO_TCLTK = NoThanks
 endif