Update to the latest autosetup

Mainly for msys/mingw support

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 41 insertions, 0 deletions

diff --git a/autosetup/cc-lib.tcl b/autosetup/cc-lib.tcl
index e769db9..f4fb0db 100644
--- a/autosetup/cc-lib.tcl
+++ b/autosetup/cc-lib.tcl
@@ -34,3 +34,44 @@ proc cc-check-lfs {} {
 	define-feature lfs $lfs
 	return $lfs
 }
+
+# @cc-check-endian
+#
+# The equivalent of the AC_C_BIGENDIAN macro
+# 
+# defines 'HAVE_BIG_ENDIAN' if endian is known to be big,
+# or 'HAVE_LITTLE_ENDIAN' if endian is known to be little.
+#
+# Returns 1 if determined, or 0 if not.
+#
+proc cc-check-endian {} {
+	cc-check-includes sys/types.h sys/param.h
+	set rc 0
+	msg-checking "Checking endian..."
+	cc-with {-includes {sys/types.h sys/param.h}} {
+		if {[cctest -code {
+			#if! defined(BIG_ENDIAN) || !defined(BYTE_ORDER)
+				#error unknown
+			#elif BYTE_ORDER != BIG_ENDIAN
+				#error little
+			#endif
+		}]} {
+			define-feature big-endian
+			msg-result "big"
+			set rc 1
+		} elseif {[cctest -code {
+			#if! defined(LITTLE_ENDIAN) || !defined(BYTE_ORDER)
+				#error unknown
+			#elif BYTE_ORDER != LITTLE_ENDIAN
+				#error big
+			#endif
+		}]} {
+			define-feature little-endian
+			msg-result "little"
+			set rc 1
+		} else {
+			msg-result "unknown"
+		}
+	}
+	return $rc
+}