Use gcc-generated dependency files if we can (GNU Make and gcc required).

* Makefile.in: If AUTO_DEPEND is defined, make gcc generate
dependency files in deps/. Include those files into Makefile.

* config.in: Generated (AUTO_DEPEND).

* configure.in: --enable-autodepend is new.  Check for GNU Make
and that gcc supports -MMD -MF. Define AUTO_DEPEND if we can use
gcc and GNU make to generate dependencies.

1 files changed, 6 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 11136920dde..fe3d8f4689a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-11-14  Jan Djärv  <jan.h.d@swipnet.se>
+
+        * configure.in: --enable-autodepend is new.  Check for GNU Make
+        and that gcc supports -MMD -MF. Define AUTO_DEPEND if we can use
+        gcc and GNU make to generate dependencies.
+
 2009-10-27  Glenn Morris  <rgm@gnu.org>
 
         * make-dist: Make links to doc/lispintro/*.pdf.