travis: do not use parallel compilations

The goal is not to be fast but to get a clean log with not mixed
messages between 2 compilations executed at the same time.

diff --git a/.travis.yml b/.travis.yml
index bb9e47a..6beda37 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -46,6 +46,6 @@ before_install:
     - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update; brew upgrade automake libtool ; true; fi
 
 script:
-    - ./autogen.sh && make clean && make -j4
-    - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then ./travis-autogen.sh --disable-udev && make clean && make -j4; fi
+    - ./autogen.sh && make clean && make
+    - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then ./travis-autogen.sh --disable-udev && make clean && make ; fi
     - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then cd Xcode && xcodebuild -project libusb.xcodeproj ; fi