A general method to find the instruction switch for gcc File intrin.sh: #!/bin/bash get_instruction () { [ -z “$1″ ] && exit func_name=”$1 ” header_file=`grep –include=\*intrin.h -Rl “$func_name” /usr/lib/gcc | head -n1` [ -z “$header_file” ] && exit >&2 echo “find in: $header_file” target_directive=`grep “#pragma GCC target(\|$func_name” $header_file | grep -B 1 “$func_name” | head … Read more
Found the problem : there is a confusion between adding custom builds and custom configurations : configurations are for special tools like Visual Studio or XCode build types are a much rawer feature So to add a custom build type, there is no need to manipulate the CMAKE_CONFIGURATION_TYPES variable at all. Just set the corresponding … Read more
It seems you already have imported the opencv module, now, open your CMakeList.txt and add the follow lines: set(CMAKE_VERBOSE_MAKEFILE on) add_library(lib_opencv SHARED IMPORTED) set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION path-to-your-project/MyApplication/app/src/main/jniLibs/${ANDROID_ABI}/libopencv_java3.so) include_directories(path-to-opencv-directory/OpenCV-android-sdk/sdk/native/jni/include) set(CMAKE_CXX_FLAGS “${CMAKE_CXX_FLAGS} -std=gnu++11”) and edit the: target_link_libraries( # Specifies the target library. native-lib lib_opencv # Links the target library to the log library # included in the … Read more
I have had limited success with the following work-around to the apparent lack of ability to dynamically query for the properties of a target. I invoke the cmake command to list all properties, and then try each one on the target. # Get all propreties that cmake supports if(NOT CMAKE_PROPERTY_LIST) execute_process(COMMAND cmake –help-property-list OUTPUT_VARIABLE CMAKE_PROPERTY_LIST) … Read more
Easy. Here is the example from the top of my head: The top level CMakeLists.txt: cmake_minimum_required(VERSION 2.8.10) # You can tweak some common (for all subprojects) stuff here. For example: set(CMAKE_DISABLE_IN_SOURCE_BUILD ON) set(CMAKE_DISABLE_SOURCE_CHANGES ON) if (“${CMAKE_SOURCE_DIR}” STREQUAL “${CMAKE_BINARY_DIR}”) message(SEND_ERROR “In-source builds are not allowed.”) endif () set(CMAKE_VERBOSE_MAKEFILE ON) set(CMAKE_COLOR_MAKEFILE ON) # Remove ‘lib’ prefix for … Read more
You can use the new OBJECT library feature introduced in CMake 2.8.8. The idea is explained here. Basically, the OBJECT library is a similar concept to the convenience library known from Autotools to group object files. Check the complete CMake OBJECT library tutorial.
Typical CMake scripts like FindGLEW will define variables that specify the paths and files that your project needs. If the script can’t automatically identify the correct paths (usually because of nonstandard install location, which is fine), then it leaves these variables up to you to fill in. With command line CMake, you use the -D … Read more
NOTE Some have reported that this doesn’t work for them. It definitely used to work for the project I was working on at the time, which was using CMake’s Makefile generator on Ubuntu. It’s possible this technique (hack?) only works with CMake’s Makefile generator, so if you’re using Ninja or another generator, that might be … Read more
To change the build type, on Windows, it must be done at build time: cmake –build {DIR} –config Release By default it’s Debug. I’m still looking for a way of changing this default. CMAKE_BUILD_TYPE doesn’t work of course, and tweaking CMAKE_CONFIGURATION_TYPES doesn’t work either, obviously for the same reason, they only apply for Unix makefiles, … Read more
As mentioned in the documentation of the set command, each directory added with add_subdirectory or each function declared with function creates a new scope. The new child scope inherits all variable definitions from its parent scope. Variable assignments in the new child scope with the set command will only be visible in the child scope … Read more