cross-x86_64-w64-mingw32: unbreak

restrict to x86_64
enable parallel build

srcpkgs/cross-x86_64-w64-mingw32/template

@@ -31,7 +31,7 @@ checksum="
  d59726f34f7852a081fbd3defd1ab2136f174110fc2e0c8d10bb122173fa9ed8
  5527e1f6496841e2bb72f97a184fc79affdcd37972eaa9ebf7a5fd05c31ff803"
 
-archs="i686 x86_64"
+archs="x86_64"
 create_wrksrc=yes
 hostmakedepends="perl flex"
 makedepends="zlib-devel"
@@ -42,8 +42,6 @@ nostrip=yes
 nopie=yes
 nodebug=yes
 
-broken="configure: error: cannot compute suffix of object files: cannot compile"
-
 # https://sourceforge.net/p/mingw-w64/wiki2/Cross%20Win32%20and%20Win64%20compiler/
 # https://gcc.gnu.org/install/configure.html
 # http://mingw-w64.org/doku.php/configure
@@ -68,7 +66,7 @@ _binutils_build() {
 		--enable-lto \
 		--with-system-zlib
 
-	make && make install
+	make ${makejobs} && make install
 }
 
 _mingw_headers() {
@@ -87,7 +85,7 @@ _mingw_headers() {
 		--enable-secure-api \
 		--enable-sdk=all
 
-	make && make install
+	make ${makejobs} && make install
 
 	# manually create required symlinks
 	(cd ${_sysroot} && ln -sfT "." "mingw")
@@ -125,7 +123,7 @@ _gcc_bootstrap() {
 		--with-system-zlib \
 		--enable-languages=c,c++,lto
 
-	make all-gcc && make install-gcc
+	make ${makejobs} all-gcc && make install-gcc
 }
 
 _mingw_crt_build() {
@@ -156,7 +154,7 @@ _mingw_crt_build() {
 		--host=${_target} \
 		${_crt_configure_args}
 
-	make && make install
+	make ${makejobs} && make install
 }
 
 _mingw_winpthreads_build() {
@@ -182,7 +180,7 @@ _mingw_winpthreads_build() {
 		--enable-static \
 		--enable-shared
 
-	make && make install
+	make ${makejobs} && make install
 }
 
 _gcc_build() {
@@ -196,7 +194,7 @@ _gcc_build() {
 
 	# should be already configured previously
 	# no need for install since this is the last step
-	make
+	make ${makejobs}
 }
 
 _build_cross() {