****** Internal Builder is used for build               ******
g++ -ot1.o ..t1.cpp
Internal Builder: Cannot run program "g++": The system cannot find the file specified.

Build error occurred, build is stopped

binutils
gcc
gcc-core
gcc-g++
gcc-mingw-core
gcc-mingw-g++
make
gdb (needed if you want to support debug in eclipse)

cygdrivec -> c:
cygdrived -> d:
other drives if any .......

project properties / c/c++ build / settings / tool settings / cygwin C compiler

sh -c 'whatever was already there'