cmake_minimum_required(VERSION 3.4)

file(WRITE main.cpp "int main() {}")

foreach(i RANGE 0 10)
    add_executable(foo${i} main.cpp)
endforeach()

##

$ NINJA_STATUS="%r" ninja -v -j 10
10/usr/bin/g++      -MD -MT CMakeFiles/foo2.dir/main.cpp.o -MF CMakeFiles/foo2.dir/main.cpp.o.d -o CMakeFiles/foo2.dir/main.cpp.o -c /home/ngladitz/src/test/simul/main.cpp
10/usr/bin/g++      -MD -MT CMakeFiles/foo10.dir/main.cpp.o -MF CMakeFiles/foo10.dir/main.cpp.o.d -o CMakeFiles/foo10.dir/main.cpp.o -c /home/ngladitz/src/test/simul/main.cpp
10/usr/bin/g++      -MD -MT CMakeFiles/foo4.dir/main.cpp.o -MF CMakeFiles/foo4.dir/main.cpp.o.d -o CMakeFiles/foo4.dir/main.cpp.o -c /home/ngladitz/src/test/simul/main.cpp
10/usr/bin/g++      -MD -MT CMakeFiles/foo5.dir/main.cpp.o -MF CMakeFiles/foo5.dir/main.cpp.o.d -o CMakeFiles/foo5.dir/main.cpp.o -c /home/ngladitz/src/test/simul/main.cpp
10/usr/bin/g++      -MD -MT CMakeFiles/foo7.dir/main.cpp.o -MF CMakeFiles/foo7.dir/main.cpp.o.d -o CMakeFiles/foo7.dir/main.cpp.o -c /home/ngladitz/src/test/simul/main.cpp
10/usr/bin/g++      -MD -MT CMakeFiles/foo1.dir/main.cpp.o -MF CMakeFiles/foo1.dir/main.cpp.o.d -o CMakeFiles/foo1.dir/main.cpp.o -c /home/ngladitz/src/test/simul/main.cpp
10/usr/bin/g++      -MD -MT CMakeFiles/foo8.dir/main.cpp.o -MF CMakeFiles/foo8.dir/main.cpp.o.d -o CMakeFiles/foo8.dir/main.cpp.o -c /home/ngladitz/src/test/simul/main.cpp
10/usr/bin/g++      -MD -MT CMakeFiles/foo0.dir/main.cpp.o -MF CMakeFiles/foo0.dir/main.cpp.o.d -o CMakeFiles/foo0.dir/main.cpp.o -c /home/ngladitz/src/test/simul/main.cpp
10/usr/bin/g++      -MD -MT CMakeFiles/foo3.dir/main.cpp.o -MF CMakeFiles/foo3.dir/main.cpp.o.d -o CMakeFiles/foo3.dir/main.cpp.o -c /home/ngladitz/src/test/simul/main.cpp
10/usr/bin/g++      -MD -MT CMakeFiles/foo6.dir/main.cpp.o -MF CMakeFiles/foo6.dir/main.cpp.o.d -o CMakeFiles/foo6.dir/main.cpp.o -c /home/ngladitz/src/test/simul/main.cpp
10: && /usr/bin/g++      CMakeFiles/foo2.dir/main.cpp.o  -o foo2   && :
10: && /usr/bin/g++      CMakeFiles/foo7.dir/main.cpp.o  -o foo7   && :
9: && /usr/bin/g++      CMakeFiles/foo4.dir/main.cpp.o  -o foo4   && :
8: && /usr/bin/g++      CMakeFiles/foo8.dir/main.cpp.o  -o foo8   && :
7: && /usr/bin/g++      CMakeFiles/foo1.dir/main.cpp.o  -o foo1   && :
6: && /usr/bin/g++      CMakeFiles/foo3.dir/main.cpp.o  -o foo3   && :
5: && /usr/bin/g++      CMakeFiles/foo10.dir/main.cpp.o  -o foo10   && :
4: && /usr/bin/g++      CMakeFiles/foo5.dir/main.cpp.o  -o foo5   && :
3/usr/bin/g++      -MD -MT CMakeFiles/foo9.dir/main.cpp.o -MF CMakeFiles/foo9.dir/main.cpp.o.d -o CMakeFiles/foo9.dir/main.cpp.o -c /home/ngladitz/src/test/simul/main.cpp
3: && /usr/bin/g++      CMakeFiles/foo6.dir/main.cpp.o  -o foo6   && :
2: && /usr/bin/g++      CMakeFiles/foo0.dir/main.cpp.o  -o foo0   && :
1: && /usr/bin/g++      CMakeFiles/foo9.dir/main.cpp.o  -o foo9   && :