GitHub: add workflow to provide an openocd snapshot binaries for win32

This change could be used within OpenOCD GitHub forks.

Once workflow actions are enabled in the GitHub project, this workflow
will be run automatically on each push into OpenOCD.

This workflow will provide a neutral build of openocd for win32, then
the package will be available for download in Actions section.
Note: the artifact will be deleted after 90 day (actual GitHub rules)

If the push is a tag, the generated package will be uploaded to release
pane under the corresponding release, and it will resides forever.

The built openocd enables libusb1, hidapi and libftdi adapters,
and could be extended to cover more adapters and Oses

PS: ./contrib/cross-build.sh updated to build libftdi from source like
libusb1 and hidapi.

Change-Id: I290c8aa14a12548e2dcb6a0eee456430ea44ab9f
Signed-off-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Reviewed-on: http://openocd.zylin.com/5594
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

contrib/cross-build.sh

@@ -15,8 +15,8 @@
 #
 # This script is probably more useful as a reference than as a complete build
 # tool but for some configurations it may be usable as-is. It only cross-
-# builds libusb-1.0 from source, but the script can be extended to build other
-# prerequisites in a similar manner.
+# builds libusb-1.0, hidapi and libftdi from source, but the script can be
+# extended to build other prerequisites in a similar manner.
 #
 # Usage:
 # export LIBUSB1_SRC=/path/to/libusb-1.0
@@ -36,17 +36,20 @@ WORK_DIR=$PWD
 
 ## Source code paths, customize as necessary
 : ${OPENOCD_SRC:="`dirname "$0"`/.."}
-: ${LIBUSB1_SRC:=/path/to/libusb}
+: ${LIBUSB1_SRC:=/path/to/libusb1}
 : ${HIDAPI_SRC:=/path/to/hidapi}
+: ${LIBFTDI_SRC:=/path/to/libftdi}
 
 OPENOCD_SRC=`readlink -m $OPENOCD_SRC`
 LIBUSB1_SRC=`readlink -m $LIBUSB1_SRC`
 HIDAPI_SRC=`readlink -m $HIDAPI_SRC`
+LIBFTDI_SRC=`readlink -m $LIBFTDI_SRC`
 
 HOST_TRIPLET=$1
 BUILD_DIR=$WORK_DIR/$HOST_TRIPLET-build
 LIBUSB1_BUILD_DIR=$BUILD_DIR/libusb1
 HIDAPI_BUILD_DIR=$BUILD_DIR/hidapi
+LIBFTDI_BUILD_DIR=$BUILD_DIR/libftdi
 OPENOCD_BUILD_DIR=$BUILD_DIR/openocd
 
 ## Root of host file tree
@@ -55,8 +58,12 @@ SYSROOT=$WORK_DIR/$HOST_TRIPLET-root
 ## Install location within host file tree
 : ${PREFIX=/usr}
 
+## Make parallel jobs
+: ${MAKE_JOBS:=1}
+
 ## OpenOCD-only install dir for packaging
-PACKAGE_DIR=$WORK_DIR/openocd_`git --git-dir=$OPENOCD_SRC/.git describe`_$HOST_TRIPLET
+: ${OPENOCD_TAG:=`git --git-dir=$OPENOCD_SRC/.git describe --tags`}
+PACKAGE_DIR=$WORK_DIR/openocd_${OPENOCD_TAG}_${HOST_TRIPLET}
 
 #######
 
@@ -86,13 +93,15 @@ rm -rf $SYSROOT $BUILD_DIR
 mkdir -p $SYSROOT
 
 # libusb-1.0 build & install into sysroot
-mkdir -p $LIBUSB1_BUILD_DIR
-cd $LIBUSB1_BUILD_DIR
-$LIBUSB1_SRC/configure --build=`$LIBUSB1_SRC/config.guess` --host=$HOST_TRIPLET \
---with-sysroot=$SYSROOT --prefix=$PREFIX \
-$LIBUSB1_CONFIG
-make
-make install DESTDIR=$SYSROOT
+if [ -d $LIBUSB1_SRC ] ; then
+  mkdir -p $LIBUSB1_BUILD_DIR
+  cd $LIBUSB1_BUILD_DIR
+  $LIBUSB1_SRC/configure --build=`$LIBUSB1_SRC/config.guess` --host=$HOST_TRIPLET \
+  --with-sysroot=$SYSROOT --prefix=$PREFIX \
+  $LIBUSB1_CONFIG
+  make -j $MAKE_JOBS
+  make install DESTDIR=$SYSROOT
+fi
 
 # hidapi build & install into sysroot
 if [ -d $HIDAPI_SRC ] ; then
@@ -101,7 +110,22 @@ if [ -d $HIDAPI_SRC ] ; then
   $HIDAPI_SRC/configure --build=`$HIDAPI_SRC/config.guess` --host=$HOST_TRIPLET \
     --with-sysroot=$SYSROOT --prefix=$PREFIX \
     $HIDAPI_CONFIG
-  make
+  make -j $MAKE_JOBS
+  make install DESTDIR=$SYSROOT
+fi
+
+# libftdi build & install into sysroot
+if [ -d $LIBFTDI_SRC ] ; then
+  mkdir -p $LIBFTDI_BUILD_DIR
+  cd $LIBFTDI_BUILD_DIR
+  # libftdi requires libusb1 static libraries, granted by:
+  # export LIBUSB1_CONFIG="--enable-static ..."
+  cmake $LIBFTDI_CONFIG \
+    -DLIBUSB_INCLUDE_DIR=${SYSROOT}${PREFIX}/include/libusb-1.0 \
+    -DLIBUSB_LIBRARIES=${SYSROOT}${PREFIX}/lib/libusb-1.0.a \
+    -DCMAKE_INSTALL_PREFIX=${PREFIX} \
+    -DPKG_CONFIG_EXECUTABLE=`which pkg-config` \
+    $LIBFTDI_SRC
   make install DESTDIR=$SYSROOT
 fi
 
@@ -111,9 +135,10 @@ cd $OPENOCD_BUILD_DIR
 $OPENOCD_SRC/configure --build=`$OPENOCD_SRC/config.guess` --host=$HOST_TRIPLET \
 --with-sysroot=$SYSROOT --prefix=$PREFIX \
 $OPENOCD_CONFIG
-make
-make install DESTDIR=$SYSROOT
+make -j $MAKE_JOBS
+make install-strip DESTDIR=$SYSROOT
 
 # Separate OpenOCD install w/o dependencies. OpenOCD will have to be linked
 # statically or have dependencies packaged/installed separately.
-make install DESTDIR=$PACKAGE_DIR
+make install-strip DESTDIR=$PACKAGE_DIR
+