Add Drone CI build scripts.

.drone.yml

@@ -0,0 +1,13 @@
+build:
+  image: fracting/msys32
+  pull: true
+  shell: $$platform
+  commands:
+    - export platform=$$platform
+    - ./ci-build.sh
+
+matrix:
+  platform:
+    - bash
+    - msys32
+    - mingw32

ci-build.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -e
+
+if test "$platform" = "bash"; then
+    echo "Building on Ubuntu Linux x86_64"
+    sudo apt-get install build-essential automake
+elif test "$platform" = "msys32"; then
+    echo "Building on Msys2 i686"
+elif test "$platform" = "mingw32"; then
+    echo "Building on MinGW-w64 i686"
+    pacman --sync --noconfirm --noprogressbar mingw-w64-i686-gettext
+else
+    echo "unknown environment!"
+    exit 1
+fi
+
+./autogen.sh
+make
+make check || echo WARNING: make check failed