Fix build when CMake 2.6 is used not supporting --parallel

.travis.yml

@@ -9,13 +9,13 @@ matrix:
         - mkdir ./build_unknown_release
         - cd ./build_unknown_release
         - cmake -DCMAKE_CXX_COMPILER=$COMPILER -DCMAKE_BUILD_TYPE=Release -DGLM_TEST_ENABLE=ON -DGLM_DISABLE_AUTO_DETECTION=ON ..
-        - cmake --build . --parallel
-        - ctest --parallel 4 --output-on-failure
+        - cmake --build .
+        - ctest --output-on-failure
         - cd $TRAVIS_BUILD_DIR
         - mkdir ./build_test_cmake
         - cd ./build_test_cmake
         - cmake -DCMAKE_CXX_COMPILER=$COMPILER $TRAVIS_BUILD_DIR/test/cmake/ -Dglm_DIR=$TRAVIS_BUILD_DIR/cmake/glm/
-        - cmake --build . --parallel 
+        - cmake --build .
       env:
         - MATRIX_EVAL="INFO=C++unknown-release"
 
@@ -26,13 +26,13 @@ matrix:
         - mkdir ./build_pure_98_release
         - cd ./build_pure_98_release
         - cmake -DCMAKE_CXX_COMPILER=$COMPILER -DCMAKE_BUILD_TYPE=Release -DGLM_TEST_ENABLE=ON -DGLM_TEST_ENABLE_CXX_98=ON -DGLM_TEST_FORCE_PURE=ON ..
-        - cmake --build . --parallel
-        - ctest --parallel 4 --output-on-failure
+        - cmake --build .
+        - ctest --output-on-failure
         - cd $TRAVIS_BUILD_DIR
         - mkdir ./build_test_cmake
         - cd ./build_test_cmake
         - cmake -DCMAKE_CXX_COMPILER=$COMPILER $TRAVIS_BUILD_DIR/test/cmake/ -Dglm_DIR=$TRAVIS_BUILD_DIR/cmake/glm/
-        - cmake --build . --parallel 
+        - cmake --build .
       env:
         - MATRIX_EVAL="INFO=C++98-pure-release"
 
@@ -43,13 +43,13 @@ matrix:
         - mkdir ./build_pure_ms_release
         - cd ./build_pure_ms_release
         - cmake -DCMAKE_CXX_COMPILER=$COMPILER -DCMAKE_BUILD_TYPE=Release -DGLM_TEST_ENABLE=ON -DGLM_TEST_ENABLE_CXX_98=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON ..
-        - cmake --build . --parallel
-        - ctest --parallel 4 --output-on-failure
+        - cmake --build .
+        - ctest --output-on-failure
         - cd $TRAVIS_BUILD_DIR
         - mkdir ./build_test_cmake
         - cd ./build_test_cmake
         - cmake -DCMAKE_CXX_COMPILER=$COMPILER $TRAVIS_BUILD_DIR/test/cmake/ -Dglm_DIR=$TRAVIS_BUILD_DIR/cmake/glm/
-        - cmake --build . --parallel
+        - cmake --build .
       env:
         - MATRIX_EVAL="INFO=C++98-pure-ms-release"
 
@@ -60,13 +60,13 @@ matrix:
         - mkdir ./build_pure_11_release
         - cd ./build_pure_11_release
         - cmake -DCMAKE_CXX_COMPILER=$COMPILER -DCMAKE_BUILD_TYPE=Release -DGLM_TEST_ENABLE=ON -DGLM_TEST_ENABLE_CXX_11=ON -DGLM_TEST_FORCE_PURE=ON ..
-        - cmake --build . --parallel
-        - ctest --parallel 4 --output-on-failure
+        - cmake --build .
+        - ctest --output-on-failure
         - cd $TRAVIS_BUILD_DIR
         - mkdir ./build_test_cmake
         - cd ./build_test_cmake
         - cmake -DCMAKE_CXX_COMPILER=$COMPILER $TRAVIS_BUILD_DIR/test/cmake/ -Dglm_DIR=$TRAVIS_BUILD_DIR/cmake/glm/
-        - cmake --build . --parallel
+        - cmake --build .
       env:
         - MATRIX_EVAL="INFO=C++11-pure-release"
 
@@ -77,13 +77,13 @@ matrix:
         - mkdir ./build_sse2_11_release
         - cd ./build_sse2_11_release
         - cmake -DCMAKE_CXX_COMPILER=$COMPILER -DCMAKE_BUILD_TYPE=Release -DGLM_TEST_ENABLE=ON -DGLM_TEST_ENABLE_CXX_11=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON -DGLM_TEST_ENABLE_SIMD_SSE2=ON ..
-        - cmake --build . --parallel
-        - ctest --parallel 4 --output-on-failure
+        - cmake --build .
+        - ctest --output-on-failure
         - cd $TRAVIS_BUILD_DIR
         - mkdir ./build_test_cmake
         - cd ./build_test_cmake
         - cmake -DCMAKE_CXX_COMPILER=$COMPILER $TRAVIS_BUILD_DIR/test/cmake/ -Dglm_DIR=$TRAVIS_BUILD_DIR/cmake/glm/
-        - cmake --build . --parallel
+        - cmake --build .
       env:
         - MATRIX_EVAL="INFO=C++11-sse2-release"