wrappers: Move common arguments into a shared config file

install-wrappers.sh

@@ -123,6 +123,7 @@ fi
 
 mkdir -p "$PREFIX/bin"
 cp wrappers/*-wrapper.sh "$PREFIX/bin"
+cp wrappers/mingw32-common.cfg $PREFIX/bin
 for arch in $ARCHS; do
     cp wrappers/$arch-w64-windows-gnu.cfg $PREFIX/bin
 done

wrappers/aarch64-w64-windows-gnu.cfg

@@ -1,6 +1,3 @@
 -target aarch64-w64-mingw32
--rtlib=compiler-rt
+@mingw32-common.cfg
--unwindlib=libunwind
--stdlib=libc++
--fuse-ld=lld
 # SEH is the default for aarch64.

wrappers/armv7-w64-windows-gnu.cfg

@@ -1,6 +1,3 @@
 -target armv7-w64-mingw32
--rtlib=compiler-rt
+@mingw32-common.cfg
--unwindlib=libunwind
--stdlib=libc++
--fuse-ld=lld
 # SEH is the default for armv7.

wrappers/i686-w64-windows-gnu.cfg

@@ -1,6 +1,3 @@
 -target i686-w64-mingw32
--rtlib=compiler-rt
+@mingw32-common.cfg
--unwindlib=libunwind
--stdlib=libc++
--fuse-ld=lld
 # Dwarf is the default for i686.

wrappers/mingw32-common.cfg

@@ -0,0 +1,4 @@
+-rtlib=compiler-rt
+-unwindlib=libunwind
+-stdlib=libc++
+-fuse-ld=lld

wrappers/x86_64-w64-windows-gnu.cfg

@@ -1,6 +1,3 @@
 -target x86_64-w64-mingw32
--rtlib=compiler-rt
+@mingw32-common.cfg
--unwindlib=libunwind
--stdlib=libc++
--fuse-ld=lld
 # SEH is the default for x86_64.