configure: Source .config if it exists.

Author: bmc0

.gitignore

@@ -3,3 +3,4 @@ dsp
 *.o
 *.so
 config.mk
+.config

configure

@@ -19,8 +19,17 @@ Options:
   --prefix=path (default: $PREFIX)
   --bindir=path (default: $BINDIR)
   --libdir=path (default: $LIBDIR)
+  --no-config
   --help"
 
+for i in "$@"; do
+	case "$i" in
+		--no-config) NO_CONFIG=y ;;
+	esac
+done
+
+[ "$NO_CONFIG" != "y" -a -f ./.config ] && . ./.config
+
 for i in "$@"; do
 	case "$i" in
 		--disable-dsp)        CONFIG_DISABLE_DSP=y ;;