[library_builders] use brew to install openblas (#68)

* [library_builders] use brew to install openblas

Yields better performance on OSX

* [tst:library_builders] add openblas

* [tst:library_builders] update homebrew

* fix bash

* [library_builders] force openblas link

library_builders.sh

@@ -93,15 +93,20 @@ function build_github {
 
 function build_openblas {
     if [ -e openblas-stamp ]; then return; fi
-    if [ -d "OpenBLAS" ]; then
-        (cd OpenBLAS && git clean -fxd && git reset --hard)
+    if [ -n "$IS_OSX" ]; then
+        brew install openblas
+        brew link --force openblas
     else
-        git clone https://github.com/xianyi/OpenBLAS
+        if [ -d "OpenBLAS" ]; then
+            (cd OpenBLAS && git clean -fxd && git reset --hard)
+        else
+            git clone https://github.com/xianyi/OpenBLAS
+        fi
+        (cd OpenBLAS \
+            && git checkout "v${OPENBLAS_VERSION}" \
+            && make DYNAMIC_ARCH=1 USE_OPENMP=0 NUM_THREADS=64 > /dev/null \
+            && make PREFIX=$BUILD_PREFIX install)
     fi
-    (cd OpenBLAS \
-        && git checkout "v${OPENBLAS_VERSION}" \
-        && make DYNAMIC_ARCH=1 USE_OPENMP=0 NUM_THREADS=64 > /dev/null \
-        && make PREFIX=$BUILD_PREFIX install)
     touch openblas-stamp
 }
 

tests/test_library_builders.sh

@@ -6,14 +6,22 @@ source library_builders.sh
 
 # set -e -x
 
+function print_failure {
+    cat $HOME/suppress.out 
+    exit 1
+}
+
 function suppress {
     # Suppress the output of a bash command unless it fails
     rm -f $HOME/suppress.out 2> /dev/null || true
-    $* 2>&1 > $HOME/suppress.out || cat $HOME/suppress.out
+    $* 2>&1 > $HOME/suppress.out || print_failure
     rm $HOME/suppress.out
 }
 
+if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update; fi
+
 suppress build_openssl
+suppress build_openblas
 suppress build_libwebp
 suppress build_szip
 suppress build_swig