Test on arm32v7-linux-gnu, ppc64le-linux-gnu and aarch64-linux-gnu.

Use docker images and qemu to test libffi for non-x86 architectures on
travis-ci.
Use the LIBFFI_TEST_OPTIMIZATION environment variable to
force specific optimization levels at test time.

.travis/build-in-container.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+cd /opt
+
+./configure 
+make
+make dist
+make check RUNTESTFLAGS="-a $RUNTESTFLAGS"
+EXITCODE=$?
+gzip -c -9 */testsuite/libffi.log > libffi.log.gz
+echo ================================================================
+echo The logs are too long for travis to handle, so we compress and
+echo uuencode them.  Download, decode and uncompress if you need to
+echo read them.
+echo ================================================================
+uuencode libffi.log.gz -
+echo ================================================================
+echo ================================================================
+exit $EXITCODE
+

.travis/build.sh

@@ -1,8 +1,5 @@
 #!/bin/bash
 
-# exit this script if any commmand fails
-# set -e
-
 function build_linux()
 {
     ./autogen.sh
@@ -10,16 +7,26 @@ function build_linux()
     make
     make dist
     make check RUNTESTFLAGS="-a $RUNTESTFLAGS"
+    EXITCODE=$?
 
     gzip -c -9 */testsuite/libffi.log > libffi.log.gz
     echo ================================================================
     echo The logs are too long for travis to handle, so we compress and
     echo uuencode them.  Download, decode and uncompress if you need to
-    echo read them.
+    echo read them.  For example, if you select and save this text
+    echo as libffi.uu, run: 'cat libffi.uu | uudecode | gzip -d | less'.
     echo ================================================================
     uuencode libffi.log.gz -
     echo ================================================================
     echo ================================================================
+
+    exit $EXITCODE
+}
+
+function build_foreign_linux()
+{
+    docker run --rm -t -i -v `pwd`:/opt --rm -ti -e LIBFFI_TEST_OPTIMIZATION="${LIBFFI_TEST_OPTIMIZATION}" $2 bash -c /opt/.travis/build-in-container.sh
+    exit $?
 }
 
 function build_ios()
@@ -28,8 +35,8 @@ function build_ios()
 # export PYTHON_BIN=/usr/local/bin/python
     ./generate-darwin-source-and-headers.py
     xcodebuild -showsdks
-    xcodebuild -project libffi.xcodeproj -target "libffi-iOS" -configuration Release -sdk iphoneos10.3
-    find ./ 
+    xcodebuild -project libffi.xcodeproj -target "libffi-iOS" -configuration Release -sdk iphoneos11.4
+    exit $?
 }
 
 ./autogen.sh
@@ -37,6 +44,18 @@ case "$HOST" in
     arm-apple-darwin*)
 	build_ios
 	;;
+    arm32v7-linux-gnu)
+        build_foreign_linux arm moxielogic/arm32v7-ci-build-container:latest 
+	;;
+    aarch64-linux-gnu)
+        build_foreign_linux aarch64 moxielogic/aarch64-ci-build-container:latest 
+	;;
+    ppc64le-linux-gnu)
+        build_foreign_linux ppc64le moxielogic/ppc64le-ci-build-container:latest 
+	;;
+    s390x-linux-gnu)
+	build_foreign_linux s390x s390x/ubuntu
+	;;
     *)
 	build_linux
 	;;

.travis/install.sh

@@ -2,24 +2,39 @@
 set -x
 
 if [[ $TRAVIS_OS_NAME != 'linux' ]]; then
-  brew update
+  brew update > brew-update.log 2>&1
   # fix an issue with libtool on travis by reinstalling it
   brew uninstall libtool;
   brew install libtool dejagnu;
 else
+  sudo apt-get clean # clear the cache
   sudo apt-get update
-  sudo apt-get install dejagnu texinfo sharutils
-  case "$HOST" in
-    i386-pc-linux-gnu)
-	sudo apt-get install gcc-multilib g++-multilib
-	;;
-    moxie-elf)
-	echo 'deb https://repos.moxielogic.org:7114/MoxieLogic moxiedev main' | sudo tee -a /etc/apt/sources.list
-	sudo apt-get clean # clear the cache
-	sudo apt-get update ## -qq
-	# debug...
-	curl https://repos.moxielogic.org:7114/MoxieLogic/dists/moxiedev/main/binary-amd64/Packages
-	sudo apt-get install -y --allow-unauthenticated moxielogic-moxie-elf-gcc moxielogic-moxie-elf-gcc-c++ moxielogic-moxie-elf-gcc-libstdc++ moxielogic-moxie-elf-gdb-sim
-	;;
+  case $HOST in
+      arm32v7-linux-gnu | aarch64-linux-gnu | ppc64le-linux-gnu | s390x-linux-gnu)
+	  sudo apt-get install qemu-user-static
+	  ;;
+      i386-pc-linux-gnu)
+	  sudo apt-get install gcc-multilib g++-multilib;
+	  ;;
+      moxie-elf)
+	  echo 'deb https://repos.moxielogic.org:7114/MoxieLogic moxiedev main' | sudo tee -a /etc/apt/sources.list
+	  sudo apt-get clean # clear the cache
+	  sudo apt-get update ## -qq
+	  # debug...
+	  curl https://repos.moxielogic.org:7114/MoxieLogic/dists/moxiedev/main/binary-amd64/Packages
+	  sudo apt-get update
+	  sudo apt-get install -y --allow-unauthenticated moxielogic-moxie-elf-gcc moxielogic-moxie-elf-gcc-c++ moxielogic-moxie-elf-gcc-libstdc++ moxielogic-moxie-elf-gdb-sim
+	  ;;
+      i686-w64-mingw32)
+	  sudo apt-get install gcc-mingw-w64-i686 binutils-mingw-w64-i686 wine;
+	  ;;
+  esac
+  case $HOST in
+      arm32v7-linux-gnu | aarch64-linux-gnu | ppc64le-linux-gnu | s390x-linux-gnu)
+          # don't install host tools
+          ;;
+      *)
+	  sudo apt-get install dejagnu texinfo sharutils
+	  ;;
   esac
 fi