[build/CI] improvement openMVG#718. Build only OpenMVG core libraries…

… for unit testing and faster build.

.travis.yml

@@ -53,13 +53,15 @@ before_script:
   - mkdir $OPENMVG_BUILD
   - cd $OPENMVG_BUILD
   # Classic release build
-  # - SCHUR_SPECIALIZATIONS set to OFF to speed up build time (ceres)
+  #  - Compile only OpenMVG core libraries for unit testing
+  #  - SCHUR_SPECIALIZATIONS set to OFF to speed up build time (ceres)
   - >
     cmake \
       -DCMAKE_CXX_COMPILER=$COMPILER \
       -DCMAKE_BUILD_TYPE=release \
       -DOpenMVG_BUILD_TESTS=ON \
       -DOpenMVG_BUILD_EXAMPLES=ON \
+      -DOpenMVG_BUILD_SOFTWARES=OFF \
       -DSCHUR_SPECIALIZATIONS=OFF \
       . $OPENMVG_SOURCE
 

src/CMakeLists.txt

@@ -22,6 +22,7 @@ option(OpenMVG_BUILD_TESTS "Build OpenMVG tests" OFF)
 option(OpenMVG_BUILD_DOC "Build OpenMVG documentation" ON)
 option(OpenMVG_BUILD_EXAMPLES "Build OpenMVG samples applications." ON)
 option(OpenMVG_BUILD_OPENGL_EXAMPLES "Build OpenMVG openGL examples" OFF)
+option(OpenMVG_BUILD_SOFTWARES "Build OpenMVG softwares" ON)
 option(OpenMVG_BUILD_COVERAGE "Enable code coverage generation (gcc only)" OFF)
 option(OpenMVG_USE_OPENMP "Enable OpenMP parallelization" ON)
 # ==============================================================================
@@ -435,7 +436,9 @@ if (OpenMVG_BUILD_EXAMPLES)
 endif (OpenMVG_BUILD_EXAMPLES)
 
 # Complete software(s) build on openMVG libraries
-add_subdirectory(software)
+if (OpenMVG_BUILD_SOFTWARES)
+  add_subdirectory(software)
+endif (OpenMVG_BUILD_SOFTWARES)
 
 # Included for research purpose only
 add_subdirectory(nonFree)