The extconf.rb file seems to be hardcoded to use gmake or make under Linux environments. This will fail when a different generator is used, like CMAKE_GENERATOR=Ninja.
CMake projects should use cmake --build to build, which makes CMake automatically use the correct build tool.
(Alternatively, if your project must use a specific kind of build system, you need to override it with the -G parameter when generating the build files.)
As a workaround to install the gem, one can run this:
The
extconf.rbfile seems to be hardcoded to usegmakeormakeunder Linux environments. This will fail when a different generator is used, likeCMAKE_GENERATOR=Ninja.CMake projects should use
cmake --buildto build, which makes CMake automatically use the correct build tool.(Alternatively, if your project must use a specific kind of build system, you need to override it with the
-Gparameter when generating the build files.)As a workaround to install the gem, one can run this: