configure: Simplify argument parsing

1 files changed, 10 insertions, 13 deletions

diff --git a/configure b/configure
index b0c5f2e..b0a705e 100755
--- a/configure
+++ b/configure
@@ -74,27 +74,24 @@ CC="${CC:-cc}"
 CFLAGS="${CFLAGS:--g -O2 -pie -fPIE}"
 MANDOC="${MANDOC:-mandoc}"
 
-IFS=''
 
 # Also allow variables through arguments
 for i; do
 	case "$i" in
-	PREFIX=*|BINDIR=*|MANDIR=*|DOCDIR=*|DATADIR=*|APPSDIR=*)
-		export "${i%%=*}"="${i#*=}"
-		shift
-	;;
-	PKGCONFIG=*|MSGFMT=*|INKSCAPE=*|CC=*|CFLAGS=*|MANDOC=*)
-		export "${i%%=*}"="${i#*=}"
-		shift
-	;;
-	WITH_WEBKITGTK=*|WITH_URI_PARSER=*)
-		export "${i%%=*}"="${i#*=}"
-		shift
-	;;
 	-h|--help)
 		usage
 		exit 1
 	;;
+	-*)
+		printf "Unknown argument ‘%s’\n" "${i}"
+		usage
+		exit 1
+	;;
+	*=*)
+		# shellcheck disable=SC2163
+		export "$i"
+		shift
+	;;
 	*)
 		printf "Unknown argument ‘%s’\n" "${i}"
 		usage