build and include libsecp256k1 in windows binaries

contrib/build-wine/README.md

@@ -14,13 +14,14 @@ Usage:
  - gpg
  - 7Zip
  - Wine (>= v2)
+ - mingw-w64
 
 
 For example:
 
 
 ```
-$ sudo apt-get install wine-development dirmngr gnupg2 p7zip-full
+$ sudo apt-get install wine-development dirmngr gnupg2 p7zip-full mingw-w64
 $ wine --version
  wine-2.0 (Debian 2.0-3+b2)
 ```

contrib/build-wine/build-secp256k1.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+# heavily based on https://github.com/ofek/coincurve/blob/417e726f553460f88d7edfa5dc67bfda397c4e4a/.travis/build_windows_wheels.sh
+
+set -e
+
+build_dll() {
+    #sudo apt-get install -y mingw-w64
+    ./autogen.sh
+    echo "LDFLAGS = -no-undefined" >> Makefile.am
+    ./configure --host=$1 --enable-module-recovery --enable-experimental --enable-module-ecdh --disable-jni
+    make
+}
+
+
+cd /tmp/electrum-build
+
+if [ ! -d secp256k1 ]; then
+    git clone https://github.com/bitcoin-core/secp256k1.git
+    cd secp256k1;
+else
+    cd secp256k1
+    git pull
+fi
+
+git reset --hard 452d8e4d2a2f9f1b5be6b02e18f1ba102e5ca0b4
+git clean -f -x -q
+
+build_dll i686-w64-mingw32  # 64-bit would be: x86_64-w64-mingw32
+mv .libs/libsecp256k1-0.dll libsecp256k1.dll
+
+find -exec touch -d '2000-11-11T11:11:11+00:00' {} +
+
+echo "building libsecp256k1 finished"

contrib/build-wine/build.sh

@@ -17,6 +17,8 @@ mkdir -p /tmp/electrum-build
 mkdir -p /tmp/electrum-build/pip-cache
 export PIP_CACHE_DIR="/tmp/electrum-build/pip-cache"
 
+$here/build-secp256k1.sh || exit 1
+
 $here/prepare-wine.sh || exit 1
 
 echo "Resetting modification time in C:\Python..."

contrib/build-wine/deterministic.spec

@@ -28,6 +28,8 @@ binaries = [(PYHOME+"/libusb-1.0.dll", ".")]
 # Workaround for "Retro Look":
 binaries += [b for b in collect_dynamic_libs('PyQt5') if 'qwindowsvista' in b[0]]
 
+binaries += [('C:/tmp/libsecp256k1.dll', '.')]
+
 datas = [
     (home+'lib/currencies.json', 'electrum'),
     (home+'lib/servers.json', 'electrum'),

contrib/build-wine/prepare-wine.sh

@@ -139,4 +139,7 @@ cp libusb/MS32/dll/libusb-1.0.dll $WINEPREFIX/drive_c/python$PYTHON_VERSION/
 # add dlls needed for pyinstaller:
 cp $WINEPREFIX/drive_c/python$PYTHON_VERSION/Lib/site-packages/PyQt5/Qt/bin/* $WINEPREFIX/drive_c/python$PYTHON_VERSION/
 
+mkdir -p $WINEPREFIX/drive_c/tmp
+cp secp256k1/libsecp256k1.dll $WINEPREFIX/drive_c/tmp/
+
 echo "Wine is configured."