In order to build a package using maven, run
mvn package
If you also want to install the maven package in the local maven repository (usually in ~/.m2), use
mvn install
In case you don’t have Maven installed, you can install it on Ubuntu using
sudo apt install maven
This is the minimal CMakeLists.txt for building an executable named myproject from main.cpp:
cmake_minimum_required (VERSION 2.8.11) project (MyProject) add_executable (myproject main.cpp)
Note: If you are on Windows, you can not install scipy using pip! Follow this guide instead: https://www.scipy.org/install.html. This blog post is only for Linux-based systems!
When building some of my libraries on Travis, I encountered this error during
sudo pip3 install numpy scipy --upgrade
numpy.distutils.system_info.NotFoundError: No lapack/blas resources
Install lapack and blas:
sudo apt-get -y install liblapack-dev libblas-dev
In most cases you will then get this error message:
error: library dfftpack has Fortran sources but no Fortran compiler found
Fix that by
sudo apt-get install -y gfortran
In Travis, you can do it like this in .travis.yml:
before_install:
- sudo apt-get -y install liblapack-dev libblas-dev gfortran
You’re trying to compile something (e.g. using GCC) on Ubuntu, but you get an error message similar to this one:
/usr/bin/ld: error: cannot open crt1.o: No such file or directory /usr/bin/ld: error: cannot open crti.o: No such file or directory /usr/bin/ld: error: cannot open crtn.o: No such file or directory
You want to compile and install libc++ (sometimes also named libcxx), but CMake complains with this error message
CMake Error at cmake/Modules/MacroEnsureOutOfSourceBuild.cmake:7 (message):
libcxx requires an out of source build. Please create a separate</em>
build directory and run 'cmake /path/to/libcxx [options]' there.
Call Stack (most recent call first):
CMakeLists.txt:24 (MACRO_ENSURE_OUT_OF_SOURCE_BUILD)
CMake Error at cmake/Modules/MacroEnsureOutOfSourceBuild.cmake:8 (message):
In-source builds are not allowed.
CMake would overwrite the makefiles distributed with Compiler-RT.
Please create a directory and run cmake from there, passing the path
to this source directory as the last argument.
This process created the file `CMakeCache.txt' and the directory `CMakeFiles'.
Please delete them.
Call Stack (most recent call first):
CMakeLists.txt:24 (MACRO_ENSURE_OUT_OF_SOURCE_BUILD)