1 files changed, 29 insertions, 0 deletions
diff --git a/m4/ctng_log.m4 b/m4/ctng_log.m4
new file mode 100644
index 00000000..3f1428c3
--- /dev/null
+++ b/m4/ctng_log.m4
@@ -0,0 +1,29 @@
+# CTNG_MSG_LOG(MSG)
+# Log the MSG message to config.log
+AC_DEFUN([CTNG_MSG_LOG],
+   [AS_ECHO(["$as_me:${as_lineno-$LINENO}: AS_ESCAPE([$1])"]) >&AS_MESSAGE_LOG_FD])
+
+# CTNG_MSG_LOG_CMD(CMD, [DESC])
+# Log the output of a command CMD to config.log, prepending the
+# description DESC.
+AC_DEFUN([CTNG_MSG_LOG_CMD],
+    [AS_IF([test -n "AS_ESCAPE([$2])"],
+           [AS_ECHO(["$as_me:${as_lineno-$LINENO}: AS_ESCAPE([$2]):"]) >&AS_MESSAGE_LOG_FD],
+           [AS_ECHO(["$as_me:${as_lineno-$LINENO}: output from command '$1':"]) >&AS_MESSAGE_LOG_FD])
+     $1 | sed 's/^/| /' >&AS_MESSAGE_LOG_FD])
+
+# CTNG_MSG_LOG_ENVVAR(VAR, [DESC])
+# Log the contents of an environment variable VAR to config.log, prepending the
+# description DESC.
+AC_DEFUN([CTNG_MSG_LOG_ENVVAR],
+    [AS_IF([test -n "AS_ESCAPE([$2])"],
+           [CTNG_MSG_LOG_CMD([AS_ECHO(["$$1"])], [$2])],
+           [CTNG_MSG_LOG_CMD([AS_ECHO(["$$1"])], [variable $1 is set to])])])
+
+# CTNG_MSG_LOG_FILE(FILE, [DESC])
+# Log the contents of a file FILE to config.log, prepending the
+# description DESC.
+AC_DEFUN([CTNG_MSG_LOG_FILE],
+    [AS_IF([test -n "AS_ESCAPE([$2])"],
+           [CTNG_MSG_LOG_CMD([cat $1], [$2])],
+           [CTNG_MSG_LOG_CMD([cat $1], [contents of $1])])])