workaround to a bug where pwd / -W returns a path with slashes.

mingw-w64-pkg-config/0005-mangle.mingw.patch

@@ -12,28 +12,28 @@ diff --git a/check/check-sysroot b/check/check-sysroot
 index 0820206..d03d1c7 100755
 --- a/check/check-sysroot
 +++ b/check/check-sysroot
-@@ -6,6 +6,11 @@ set -e
- 
+@@ -6,6 +6,12 @@ set -e
+
  export PKG_CONFIG_SYSROOT_DIR=/sysroot
- 
+
 +# MSYS mangles / paths to its own root in windows format. This probably
 +# means sysroot doesn't work there, but match what pkg-config passes
 +# back anyway.
 +[ "x$OSTYPE" = "xmsys" ] && root=$(cd / && pwd -W) || root=
++root=${root%/}
 +
  RESULT=""
  run_test --cflags simple
- 
+
 @@ -20,8 +25,8 @@ if [ "$list_indirect_deps" = yes ]; then
  fi
  run_test --libs --static simple
- 
+
 -RESULT="-I/sysroot/public-dep/include"
 +RESULT="-I$root/sysroot/public-dep/include"
  run_test --cflags public-dep
- 
+
 -RESULT="-L/sysroot/public-dep/lib -lpublic-dep"
 +RESULT="-L$root/sysroot/public-dep/lib -lpublic-dep"
  run_test --libs public-dep
 -- 1.8.1.4
-

mingw-w64-pkg-config/PKGBUILD

@@ -27,7 +27,7 @@ md5sums=('aa3c86e67551adc3ac865160e34a2a0d'
          '073729fca79eb7415a88eec68504dc92'
          'a14107b8eb8640aac2e59798467128a3'
          'a605f371133ea78af740109a2b690a69'
-         '2b5a8f14761eaee3ccc35d8d24aace9f'
+         '0824f3b39004b24168b98280160e4045'
          '27602f99a978c28f963afe9313fd1604'
          'e1b804a1b0a15e9af895f6fd92907f23'
          '2ba25b1a52a48afa0d2e1b0e06aaa07c'