[openwrt/openwrt] toolchain/wrapper.sh: fix remaining shellcheck warnings

[LEDE Commits]

ynezz pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/df09cc6ddb85aeaad616aba74810c4be44284fe7

commit df09cc6ddb85aeaad616aba74810c4be44284fe7
Author: Petr Štetiar <ynezz at true.cz>
AuthorDate: Sat Jul 11 13:06:36 2020 +0200

    toolchain/wrapper.sh: fix remaining shellcheck warnings
    
    Fixes following warnings:
    
     In target/toolchain/files/wrapper.sh line 18:
     REALNAME=$(readlink -f $0)
                            ^-- SC2086: Double quote to prevent globbing and word splitting.
     --
     In target/toolchain/files/wrapper.sh line 20:
     REALNAME_BASE=$(basename $REALNAME)
                              ^-------^ SC2086: Double quote to prevent globbing and word splitting.
     --
     In target/toolchain/files/wrapper.sh line 21:
     REALNAME_DIR=$(dirname $REALNAME)
                            ^-------^ SC2086: Double quote to prevent globbing and word splitting.
     --
     In target/toolchain/files/wrapper.sh line 74:
                    exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin $GCC_SYSROOT_FLAGS $TARGET_FUNDAMENTAL_CFLAGS $TARGET_ROOTFS_CFLAGS "$@"
                         ^-----------------------^ SC2086: Double quote to prevent globbing and word splitting.
     --
     In target/toolchain/files/wrapper.sh line 77:
                    exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin $LD_SYSROOT_FLAGS $TARGET_FUNDAMENTAL_LDFLAGS "$@"
                          ^-----------------------^ SC2086: Double quote to prevent globbing and word splitting.
     --
     In target/toolchain/files/wrapper.sh line 80:
                    exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin $TARGET_FUNDAMENTAL_ASFLAGS "$@"
                          ^-----------------------^ SC2086: Double quote to prevent globbing and word splitting.
     --
     In target/toolchain/files/wrapper.sh line 83:
                    exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin "$@"
                          ^-----------------------^ SC2086: Double quote to prevent globbing and word splitting.
    
    Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
 target/toolchain/files/wrapper.sh | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/target/toolchain/files/wrapper.sh b/target/toolchain/files/wrapper.sh
index 6078d91973..6a0cdfff6c 100755
--- a/target/toolchain/files/wrapper.sh
+++ b/target/toolchain/files/wrapper.sh
@@ -15,10 +15,10 @@
 #
 
 PROGNAME=$0
-REALNAME=$(readlink -f $0)
+REALNAME=$(readlink -f "$0")
 
-REALNAME_BASE=$(basename $REALNAME)
-REALNAME_DIR=$(dirname $REALNAME)
+REALNAME_BASE=$(basename "$REALNAME")
+REALNAME_DIR=$(dirname "$REALNAME")
 
 TARGET_FUNDAMENTAL_ASFLAGS=''
 TARGET_FUNDAMENTAL_CFLAGS=''
@@ -30,7 +30,7 @@ TARGET_TOOLCHAIN_TRIPLET=${REALNAME_BASE%-*}
 BINARY=${PROGNAME##*-}
 
 # Parse our tool name, splitting it at '-' characters.
-IFS=- read -r TOOLCHAIN_ARCH TOOLCHAIN_BUILDROOT TOOLCHAIN_OS TOOLCHAIN_PLATFORM PROGNAME << EOF
+IFS=- read -r _ _ _ TOOLCHAIN_PLATFORM PROGNAME << EOF
 $REALNAME_BASE
 EOF
 
@@ -71,16 +71,16 @@ esac
 #
 case $BINARY in
 	cc|gcc|g++|c++|cpp)
-		exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin $GCC_SYSROOT_FLAGS $TARGET_FUNDAMENTAL_CFLAGS $TARGET_ROOTFS_CFLAGS "$@"
+		exec "$TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin" $GCC_SYSROOT_FLAGS $TARGET_FUNDAMENTAL_CFLAGS $TARGET_ROOTFS_CFLAGS "$@"
 		;;
 	ld)
-		exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin $LD_SYSROOT_FLAGS $TARGET_FUNDAMENTAL_LDFLAGS "$@"
+		exec "$TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin" $LD_SYSROOT_FLAGS $TARGET_FUNDAMENTAL_LDFLAGS "$@"
 		;;
 	as)
-		exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin $TARGET_FUNDAMENTAL_ASFLAGS "$@"
+		exec "$TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin" $TARGET_FUNDAMENTAL_ASFLAGS "$@"
 		;;
 	*)
-		exec $TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin "$@"
+		exec "$TARGET_TOOLCHAIN_TRIPLET-$BINARY.bin" "$@"
 		;;
 esac