macOS: Use macOS-compatible tar invocation

Tar on macOS doesn't understand option -a when used with -x - it is just
assumed to be set to true. This patch replaces `tar xaf` with `tar xf`
invocation.

Signed-off-by: Anton Kolesov <[email protected]>

Author: anthony-kolesov

README.md

@@ -90,7 +90,7 @@ versions >= 3.9 are supported. Linux sources should be located in the directory
 named `linux` that is the sibling of this `toolchain` directory. For example:
 
     $ wget https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.8.2.tar.xz
-    $ tar xaf linux-4.8.2.tar.xz --transform=s/linux-4.8.2/linux/
+    $ tar xf linux-4.8.2.tar.xz --transform=s/linux-4.8.2/linux/
 
 ### Using Git repositories
 

arc-external.sh

@@ -41,7 +41,7 @@ for url in ${urls} ; do
             if [ ! -f "${filename}" ]; then
                 $WGET "${url}"
             fi
-            tar xaf "${filename}"
+            tar xf "${filename}"
         fi
         mv "${dirname}" "${toolname}"
     fi

build-uclibc.sh

@@ -593,7 +593,7 @@ if [ $DO_NATIVE_GDB = yes ]; then
     fi
 
     build_dir_init ncurses
-    tar xaf $toolchain_build_dir/_download_tmp/$ncurses_tar --strip-components=1
+    tar xf $toolchain_build_dir/_download_tmp/$ncurses_tar --strip-components=1
 
     # GCC 5 introduced some changes to the preprocessor output, that causes a
     # compilation error in files generated by ncurses. See GCC commit:

release.mk

@@ -711,7 +711,7 @@ $O/$(ECLIPSE_VANILLA_ZIP_WIN):
 # in sync.
 $O/.stamp_ide_linux_eclipse: $O/$(ECLIPSE_VANILLA_TGZ_LINUX) $O/$(IDE_PLUGINS_ZIP)
 	mkdir -m775 -p $O/$(IDE_INSTALL_LINUX)
-	tar xaf $< -C $O/$(IDE_INSTALL_LINUX)
+	tar xf $< -C $O/$(IDE_INSTALL_LINUX)
 	$O/$(IDE_INSTALL_LINUX)/eclipse/eclipse \
 	    -application org.eclipse.equinox.p2.director \
 	    -noSplash \
@@ -733,7 +733,7 @@ $O/.stamp_ide_linux_tar: \
 	cp -al $O/$(TOOLS_LINUXLE_HS_DIR_LINUX)/* $O/$(IDE_INSTALL_LINUX)
 	cp -al $O/$(TOOLS_LINUXBE_HS_DIR_LINUX)/* $O/$(IDE_INSTALL_LINUX)
 	mkdir -m775 $O/$(IDE_INSTALL_LINUX)/eclipse/jre
-	tar xaf $O/$(JRE_TGZ_LINUX) -C $O/$(IDE_INSTALL_LINUX)/eclipse/jre \
+	tar xf $O/$(JRE_TGZ_LINUX) -C $O/$(IDE_INSTALL_LINUX)/eclipse/jre \
 	    --strip-components=1
 	cp -al $O/$(OOCD_DIR_LINUX)/* $O/$(IDE_INSTALL_LINUX)
 	tar caf $O/$(IDE_TGZ_LINUX) -C $O $(IDE_INSTALL_LINUX)
@@ -818,7 +818,7 @@ $(BUILD_DIR)/libusb-$(LIBUSB_VERSION).tar.bz2:
 
 
 $(BUILD_DIR)/libusb_linux_src: $(BUILD_DIR)/libusb-$(LIBUSB_VERSION).tar.bz2
-	tar -C $(BUILD_DIR) -xaf $< --transform='s/libusb-$(LIBUSB_VERSION)/libusb_linux_src/'
+	tar -C $(BUILD_DIR) -xf $< --transform='s/libusb-$(LIBUSB_VERSION)/libusb_linux_src/'
 
 
 .PHONY: libusb-linux-install
@@ -832,7 +832,7 @@ $(BUILD_DIR)/libusb_linux_install/lib/libusb-1.0.a: $(BUILD_DIR)/libusb_linux_sr
 
 
 $(BUILD_DIR)/libusb_win_src: $(BUILD_DIR)/libusb-$(LIBUSB_VERSION).tar.bz2
-	tar -C $(BUILD_DIR) -xaf $< --transform='s/libusb-$(LIBUSB_VERSION)/libusb_win_src/'
+	tar -C $(BUILD_DIR) -xf $< --transform='s/libusb-$(LIBUSB_VERSION)/libusb_win_src/'
 
 
 # It looks like that libusb Makefile is not parallel-friendly, it fails with error