Installing the Google C++ Testing Framework (gtest) globally
Step 1: Change into the temporary directory, for example:
cd /tmp
Step 2: Download the latest (major) version from https://github.com/google/googletest/releases, for example:
wget https://github.com/google/googletest/archive/release-1.10.0.zip
Step 3: Unpack the archive, change to the corresponding directory and build the code from its source (this requires cmake which can be installed using your favorite package manager, for example: apt on Ubuntu or brew on Mac):
unzip release-1.10.0.zip cd googletest-release-1.10.0/googletest mkdir bld cd bld cmake .. make
Step 4: Install the files, that is, copy them to the proper systems directories (you need to be root or have sudo rights for that):
cp -a -r ../include/gtest /usr/local/include/. cp -a ./lib/*.a /usr/local/lib
(optional) Step 5: If the library is (still) not found by the compiler, you can run (as root or with sudo):
ldconfig
(optional) Step 6: Clean up:
cd /tmp rm -rf release-1.10.0.zip googletest-release-1.10.0
Troubleshooting
Gtest 1.8.1 is the last release supporting pre-C++11 compilers. So if you get any errors when using Gtest > 1.8.1 in combination with a compiler that doesn't use the C++11 standard per default, try to add the -std=c++11 flag to your compile command, for example:
g++ -std=c++11 -c ApproximateEulersNumber.cpp