From: Guy Harris <guy@alum.mit.edu>
Date: Sun, 16 Jan 2011 19:47:52 +0000 (-0800)
Subject: Add a comment explaining why we're not using $< in the pcap-config rule.
X-Git-Tag: libpcap-1.2.1~85^2~12
X-Git-Url: https://git.tcpdump.org/libpcap/commitdiff_plain/5a9d67e953a499ca83b36bfd5762c46656b070e0

Add a comment explaining why we're not using $< in the pcap-config rule.
---

diff --git a/Makefile.in b/Makefile.in
index 8244bb7e..e6cd3696 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -488,6 +488,17 @@ bpf_filter.o: bpf_filter.c
 #
 # Generate the pcap-config script.
 #
+# Some Makes, e.g. AIX Make and Solaris Make, can't handle "--file=$@.tmp:$<";
+# for example, the Solaris 9 make man page says
+#
+#	Because make assigns $< and $* as it would for implicit rules
+#	(according to the suffixes list and the directory contents),
+#	they may be unreliable when used within explicit target entries.
+#
+# and this is an explicit target entry.
+#
+# Therefore, instead of using $<, we explicitly put in $(srcdir)/pcap-config.in.
+#
 pcap-config: $(srcdir)/pcap-config.in
 	@rm -f $@ $@.tmp
 	./config.status --file=$@.tmp:$(srcdir)/pcap-config.in