mpc: build for cygwin

mpc/PKGBUILD

@@ -2,7 +2,7 @@
 
 pkgname=('mpc' 'mpc-devel')
 pkgver=1.2.1
-pkgrel=2
+pkgrel=3
 pkgdesc='Multiple precision complex arithmetic library'
 groups=('libraries')
 url='http://www.multiprecision.org'
@@ -11,24 +11,28 @@ arch=('i686' 'x86_64')
 depends=('gmp>=5.0' 'mpfr')
 makedepends=('gmp-devel' 'mpfr-devel' 'autotools' 'gcc')
 options=('!emptydirs')
-source=(https://ftp.gnu.org/gnu/mpc/mpc-${pkgver}.tar.gz{,.sig}
-        mpc-1.2.1-msys2.patch)
+source=(https://ftp.gnu.org/gnu/mpc/mpc-${pkgver}.tar.gz{,.sig})
 sha256sums=('17503d2c395dfcf106b622dc142683c1199431d095367c6aacba6eec30340459'
-            'SKIP'
-            '8dbbff9597c38c98c658adec0f3d22f3f2bcc6eb4ac4504630e07fe9519abb4a')
+            'SKIP')
 validpgpkeys=('AD17A21EF8AED8F1CC02DBD9F7D5C9BF765C61E3')  # Andreas Enge
 
 
 prepare() {
   cd "${srcdir}/${pkgname}-${pkgver}"
-  patch -p1 -i ${srcdir}/mpc-1.2.1-msys2.patch
 
   autoreconf -fiv
 }
 
 build() {
   cd "${srcdir}/${pkgname}-${pkgver}"
-  ./configure --prefix=/usr --enable-shared --disable-static
+
+  local CYGWIN_CHOST="${CHOST/-msys/-cygwin}"
+  ./configure \
+    --build="${CYGWIN_CHOST}" \
+    --prefix=/usr \
+    --enable-shared \
+    --disable-static
+
   make
   make DESTDIR="$srcdir/dest" install
 }

mpc/mpc-1.2.1-msys2.patch

@@ -1,12 +0,0 @@
-diff -Naur a/configure.ac b/configure.ac
---- a/configure.ac
-+++ b/configure.ac
-@@ -225,7 +225,7 @@
- AC_SUBST(MPC_LDFLAGS)
- AC_LIBTOOL_WIN32_DLL
- case $host in
--  *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2*)
-+  *-*-cygwin* | *-*-msys* | *-*-mingw* | *-*-pw32* | *-*-os2*)
-      MPC_WINDOWS
- esac
-