Multiple Job (j3)

I am trying to run a GNU make file with multiple jobs.

When I try executing ' make.exe -r -j3', the receive the following to errors:

make.exe: Do开发者_运维知识库 not specify -j or --jobs if sh.exe is not available.
make.exe: Resetting make for single job mode.

Do I have to add ' $(SH) -c' somewhere in the makefile? If so, where?

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The error message suggests that make cannot find sh.exe. The file names indicate you are probably on CygWin. I would investigate setting the PATH to include the location of sh.exe, or defining the value of SHELL to the name (or, even, full path) of your shell.

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Are you running this on Windows (more specifically, in the "windows" shell?). If you are, you might want to read this: http://www.gnu.org/software/make/manual/make.html#Parallel

more specifically:

On MS-DOS, the ‘-j’ option has no effect, since that system doesn't support multi-processing.

Once again, assuming you're running on windows, you should get MinGW or CygWin