Better comment explaining that GNU awk is really required.

diff --git a/configure.ac b/configure.ac
index e6f49822dc2fc2528a767cfa453607c78e280177..22077bf78a85b17c200d993f32292a24d72bab23 100755 (executable)
--- a/configure.ac
+++ b/configure.ac
@@ -21,7 +21,8 @@ AC_CANONICAL_TARGET()
 AM_INIT_AUTOMAKE(1.6)
 AM_CONFIG_HEADER(config.h)
 
-dnl we need gawk for memtypes.awk
+dnl GNU awk is required for lib/memtype.h made by memtypes.awk.
+dnl BSD awk complains: awk: gensub doesn't support backreferences (subst "\1")
 AC_CHECK_PROG([GAWK],[gawk],[gawk],[/bin/false])
 AC_ARG_VAR([GAWK],[GNU AWK])