Point people to the autoconf documentation on shell substitution.
Hopefully this will keep people from sending "helpful" patches that
break things.
diff --git a/aclocal.m4 b/aclocal.m4
index 91896b3..ce746a8 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -315,6 +315,13 @@
# Found - use it to get the include flags for
# libpcap and the flags to link with libpcap.
#
+ # Please read section 11.6 "Shell Substitutions"
+ # in the autoconf manual before doing anything
+ # to this that involves quoting. Especially note
+ # the statement "There is just no portable way to use
+ # double-quoted strings inside double-quoted back-quoted
+ # expressions (pfew!)."
+ #
cflags=`"$PCAP_CONFIG" --cflags`
$2="$cflags $$2"
libpcap=`"$PCAP_CONFIG" --libs`
@@ -379,7 +386,14 @@
# The libpcap directory has a pcap-config script.
# Use it to get any additioal libraries needed
# to link with the libpcap archive library in
- # that directory
+ # that directory.
+ #
+ # Please read section 11.6 "Shell Substitutions"
+ # in the autoconf manual before doing anything
+ # to this that involves quoting. Especially note
+ # the statement "There is just no portable way to use
+ # double-quoted strings inside double-quoted back-quoted
+ # expressions (pfew!)."
#
additional_libs=`"$PCAP_CONFIG" --additional-libs --static`
libpcap="$libpcap $additional_libs"
diff --git a/configure b/configure
index 5c1bf27..b6cc137 100755
--- a/configure
+++ b/configure
@@ -7579,6 +7579,13 @@
# Found - use it to get the include flags for
# libpcap and the flags to link with libpcap.
#
+ # Please read section 11.6 "Shell Substitutions"
+ # in the autoconf manual before doing anything
+ # to this that involves quoting. Especially note
+ # the statement "There is just no portable way to use
+ # double-quoted strings inside double-quoted back-quoted
+ # expressions (pfew!)."
+ #
cflags=`"$PCAP_CONFIG" --cflags`
V_INCLS="$cflags $V_INCLS"
libpcap=`"$PCAP_CONFIG" --libs`
@@ -7729,7 +7736,14 @@
# The libpcap directory has a pcap-config script.
# Use it to get any additioal libraries needed
# to link with the libpcap archive library in
- # that directory
+ # that directory.
+ #
+ # Please read section 11.6 "Shell Substitutions"
+ # in the autoconf manual before doing anything
+ # to this that involves quoting. Especially note
+ # the statement "There is just no portable way to use
+ # double-quoted strings inside double-quoted back-quoted
+ # expressions (pfew!)."
#
additional_libs=`"$PCAP_CONFIG" --additional-libs --static`
libpcap="$libpcap $additional_libs"
