diff --git a/.travis.yml b/.travis.yml
index cfa9240d..50bedc8d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,14 @@ matrix:
       compiler: gcc
     - env: JOB=toxcore ENV=linux
       compiler: clang
+    - env: JOB=toxcore ENV=osx
+      os: osx
+    - env: JOB=toxcore ENV=windows ARCH=i686
+      services:
+        - docker
+    - env: JOB=toxcore ENV=windows ARCH=x86_64
+      services:
+        - docker
 
 addons:
   apt:
@@ -36,9 +44,10 @@ cache:
     - $HOME/.ghc
     - $HOME/cache
 
-install:      other/travis/phase $JOB $ENV install
-script:       other/travis/phase $JOB $ENV script
-after_script: other/travis/phase $JOB $ENV after_script
+install:       other/travis/phase $JOB $ENV install
+script:        other/travis/phase $JOB $ENV script
+after_script:  other/travis/phase $JOB $ENV after_script
+after_failure: other/travis/phase $JOB $ENV after_failure
 
 notifications:
   irc: "chat.freenode.net#toktok-status"
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 399b2a07..aa889ce1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -402,6 +402,11 @@ function(make_version_script header ns lib)
 endfunction()
 
 option(STRICT_ABI "Enforce strict ABI export in dynamic libraries" OFF)
+if(WIN32 OR APPLE)
+  # Windows and OSX don't have this linker functionality.
+  set(STRICT_ABI OFF)
+endif()
+
 if(STRICT_ABI)
   if(BUILD_TOXAV)
     make_version_script(${CMAKE_SOURCE_DIR}/toxav/toxav.h toxav toxav)
diff --git a/other/travis/env-linux.sh b/other/travis/env-linux.sh
index 0eb5e9ea..2544ee56 100644
--- a/other/travis/env-linux.sh
+++ b/other/travis/env-linux.sh
@@ -3,8 +3,11 @@
 CMAKE=cmake
 NPROC=`nproc`
 CURDIR=$PWD
-TESTS=true
 
 RUN() {
   "$@"
 }
+
+TESTS() {
+  "$@"
+}
diff --git a/other/travis/env-osx.sh b/other/travis/env-osx.sh
new file mode 100644
index 00000000..e45c34a7
--- /dev/null
+++ b/other/travis/env-osx.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+CMAKE=cmake
+NPROC=`sysctl -n hw.ncpu`
+CURDIR=$PWD
+
+RUN() {
+  "$@"
+}
+
+TESTS() {
+  "$@"
+}
diff --git a/other/travis/env-windows.sh b/other/travis/env-windows.sh
new file mode 100644
index 00000000..d7eecada
--- /dev/null
+++ b/other/travis/env-windows.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+CMAKE=$ARCH-w64-mingw32.shared-cmake
+NPROC=`nproc`
+CURDIR=/work
+
+RUN() {
+  ./dockcross "$@"
+}
+
+ENABLE_WINDOWS_TESTS=false
+
+TESTS() {
+  # Download Microsoft DLLs.
+  curl http://www.dlldump.com/dllfiles/I/iphlpapi.dll -o _build/iphlpapi.dll
+  curl http://www.dlldump.com/dllfiles/W/ws2_32.dll -o _build/ws2_32.dll
+
+  # Copy our dependency DLLs.
+  ./dockcross sh -c 'cp $WINEDLLPATH/*.dll _build'
+
+  # Run tests in docker.
+  if $ENABLE_WINDOWS_TESTS; then
+    ./dockcross "$@" || {
+      cat _build/Testing/Temporary/LastTest.log
+      false
+    }
+  fi
+}
diff --git a/other/travis/toxcore-after_failure b/other/travis/toxcore-after_failure
new file mode 100755
index 00000000..e1f5c399
--- /dev/null
+++ b/other/travis/toxcore-after_failure
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ -d /cores ]; then
+  for core in /cores/*; do
+    lldb --core $core --one-line "bt all" < /dev/null
+  done
+fi
diff --git a/other/travis/toxcore-osx-install b/other/travis/toxcore-osx-install
new file mode 100755
index 00000000..4b777340
--- /dev/null
+++ b/other/travis/toxcore-osx-install
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+brew install libsodium libvpx opus libconfig check astyle
diff --git a/other/travis/toxcore-script b/other/travis/toxcore-script
index 96193855..b1e60763 100755
--- a/other/travis/toxcore-script
+++ b/other/travis/toxcore-script
@@ -8,9 +8,7 @@ export CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
 # so it's disabled on Travis.
 RUN $CMAKE -B$BUILD_DIR -H. -DCMAKE_INSTALL_PREFIX:PATH=$CURDIR/_install -DDEBUG=ON -DASSOC_DHT=ON -DSTRICT_ABI=ON #-DASAN=ON
 
-RUN make -C $BUILD_DIR -j$NPROC -k install
+export CTEST_OUTPUT_ON_FAILURE=1
 
-if $TESTS; then
-  export CTEST_OUTPUT_ON_FAILURE=1
-  RUN make -C $BUILD_DIR -j$NPROC test
-fi
+RUN make -C$BUILD_DIR -j$NPROC -k install
+TESTS make -C$BUILD_DIR -j$NPROC test
diff --git a/other/travis/toxcore-windows-install b/other/travis/toxcore-windows-install
new file mode 100755
index 00000000..6160856b
--- /dev/null
+++ b/other/travis/toxcore-windows-install
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+DOCKER_IMAGE=toktoknet/windows:latest.$ARCH-shared
+
+docker pull $DOCKER_IMAGE
+docker run --rm $DOCKER_IMAGE > dockcross
+chmod +x dockcross