build: Support and-lists of script configs

1 files changed, 15 insertions, 1 deletions

diff --git a/build b/build
index e1b11ad..7e95002 100755
--- a/build
+++ b/build
@@ -6,7 +6,21 @@ config_enabled = \
 	config_enabled() \
 	{ \
 		[ "x$${1}" = 'x-' ] && return 0; \
-		grep "^CONFIG_$${1}=y$$" <src/.config >/dev/null 2>&1; \
+		enabled=false; \
+		IFS='& '; \
+		for cfg in $$(printf '%s' "$${1}"); do \
+			unset IFS; \
+			[ x"$${cfg}" = x'' ] && continue; \
+			if [ x"$${cfg#!}" = x"$${cfg}" ]; then \
+				grep -q "^CONFIG_$${cfg}=y$$" <src/.config \
+					&& enabled=true; \
+			else \
+				grep -q "^CONFIG_$${cfg#!}=y$$" <src/.config \
+					&& enabled=false; \
+			fi; \
+		done; \
+		unset IFS; \
+		$${enabled}; \
 	}
 install_init_script = \
 	install_init_script() \