--- a/configure.in Thu Oct 08 07:08:45 2009 +0000
+++ b/configure.in Thu Oct 08 09:07:58 2009 +0000
@@ -109,6 +109,29 @@
AC_C_INLINE
AC_C_VOLATILE
+dnl See whether we can use gcc style dependency tracking
+AC_ARG_ENABLE(dependency-tracking,
+AC_HELP_STRING([--enable-dependency-tracking],
+ [Use gcc -MMD -MT dependency tracking [[default=yes]]]),
+ , enable_dependency_tracking=yes)
+if test x$enable_dependency_tracking = xyes; then
+ have_gcc_mmd_mt=no
+ AC_MSG_CHECKING(for GCC -MMD -MT option)
+ AC_TRY_COMPILE([
+ #if !defined(__GNUC__) || __GNUC__ < 3
+ #error Dependency tracking requires GCC 3.0 or newer
+ #endif
+ ],[
+ ],[
+ have_gcc_mmd_mt=yes
+ ])
+ AC_MSG_RESULT($have_gcc_mmd_mt)
+
+ if test x$have_gcc_mmd_mt = xyes; then
+ DEPENDENCY_TRACKING_OPTIONS="-MMD -MT \$@"
+ fi
+fi
+
dnl See whether we are allowed to use the system C library
AC_ARG_ENABLE(libc,
AC_HELP_STRING([--enable-libc], [Use the system C library [[default=yes]]]),
@@ -2781,7 +2804,7 @@
OBJECTS=`echo "$OBJECTS" | sed 's,[[^ ]]*/\([[^ ]]*\)\.'$EXT',$(objects)/\1.lo,g'`
DEPENDS=`echo "$DEPENDS" | sed 's,\([[^ ]]*\)/\([[^ ]]*\)\.'$EXT',\\
$(objects)/\2.lo: \1/\2.'$EXT'\\
- \$(LIBTOOL) --mode=compile \$(CC) \$(CFLAGS) \$(EXTRA_CFLAGS) -MMD -MT \$@ -c \$< -o \$@,g'`
+ $(LIBTOOL) --mode=compile $(CC) $(CFLAGS) $(EXTRA_CFLAGS) '"$DEPENDENCY_TRACKING_OPTIONS"' -c $< -o $@,g'`
done
VERSION_OBJECTS=`echo $VERSION_SOURCES`
@@ -2796,7 +2819,7 @@
SDLMAIN_OBJECTS=`echo "$SDLMAIN_OBJECTS" | sed 's,[[^ ]]*/\([[^ ]]*\)\.c,$(objects)/\1.o,g'`
SDLMAIN_DEPENDS=`echo "$SDLMAIN_DEPENDS" | sed 's,\([[^ ]]*\)/\([[^ ]]*\)\.c,\\
$(objects)/\2.o: \1/\2.c\\
- \$(LIBTOOL) --mode=compile \$(CC) \$(CFLAGS) \$(EXTRA_CFLAGS) -MMD -MT \$@ -c \$< -o \$@,g'`
+ $(LIBTOOL) --mode=compile $(CC) $(CFLAGS) $(EXTRA_CFLAGS) '"$DEPENDENCY_TRACKING_OPTIONS"' -c $< -o $@,g'`
# Set runtime shared library paths as needed