diff --git a/.travis.yml b/.travis.yml
index 680947e..ee6fcea 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,9 +18,30 @@ matrix:
   # TODO These are all the build jobs. Adjust as necessary. Comment out what you
   # don't need
   include:
+    # Android
+    - env: TARGET=aarch64-linux-android DISABLE_TESTS=1
+    - env: TARGET=arm-linux-androideabi DISABLE_TESTS=1
+    - env: TARGET=armv7-linux-androideabi DISABLE_TESTS=1
+    - env: TARGET=i686-linux-android DISABLE_TESTS=1
+
+    # iOS
+    - env: TARGET=aarch64-apple-ios DISABLE_TESTS=1
+      os: osx
+    - env: TARGET=armv7-apple-ios DISABLE_TESTS=1
+      os: osx
+    - env: TARGET=armv7s-apple-ios DISABLE_TESTS=1
+      os: osx
+    - env: TARGET=i386-apple-ios DISABLE_TESTS=1
+      os: osx
+    - env: TARGET=x86_64-apple-ios DISABLE_TESTS=1
+      os: osx
+
     # Linux
     - env: TARGET=aarch64-unknown-linux-gnu
+    - env: TARGET=arm-unknown-linux-gnueabi
+    - env: TARGET=arm-unknown-linux-musleabi
     - env: TARGET=armv7-unknown-linux-gnueabihf
+    - env: TARGET=armv7-unknown-linux-musleabihf
     - env: TARGET=i686-unknown-linux-gnu
     - env: TARGET=i686-unknown-linux-musl
     - env: TARGET=mips-unknown-linux-gnu
@@ -45,6 +66,16 @@ matrix:
     - env: TARGET=x86_64-unknown-freebsd DISABLE_TESTS=1
     - env: TARGET=x86_64-unknown-netbsd DISABLE_TESTS=1
 
+    # Windows
+    - env: TARGET=x86_64-pc-windows-gnu
+
+    # Bare metal
+    # These targets don't support std and as such are likely not suitable for
+    # most crates.
+    # - env: TARGET=thumbv6m-none-eabi
+    # - env: TARGET=thumbv7em-none-eabi
+    # - env: TARGET=thumbv7em-none-eabihf
+    # - env: TARGET=thumbv7m-none-eabi
 
     # Testing other channels
     - env: TARGET=x86_64-unknown-linux-gnu
diff --git a/hello.c b/hello.c
index 2ee623f..7c5ed10 100644
--- a/hello.c
+++ b/hello.c
@@ -1,5 +1,5 @@
-#include <stdio.h>
+#include <unistd.h>
 
 void hello() {
-  printf("Hello, world!\n");
+    write(0, "Hello, world!\n", 14);
 }