redo is mentioned elsewhere in this very discussion. One of the things that Daniel J. Bernstein did in his packages is merge steps two and three. There would

redo is mentioned elsewhere in this very discussion. One of the things that Daniel J. Bernstein did in his packages is merge steps two and three. There would be makefile/redo rules for detecting the presence of operating-system-specific stuff, and linking the appropriate source/header files into place. Here's an example from ucspi-tcp that auto-configures whether the platform supports waitpid(): * https://github.com/comotion/ucspi-tcp/blob/master/Makefile#L338 https://github.com/comotion/ucspi-tcp/blob/master/Makefile#L... * https://github.com/comotion/ucspi-tcp/blob/master/choose.sh https://github.com/comotion/ucspi-tcp/blob/master/choose.sh * https://github.com/comotion/ucspi-tcp/blob/master/trywaitp.c https://github.com/comotion/ucspi-tcp/blob/master/trywaitp.c * https://github.com/comotion/ucspi-tcp/blob/master/haswaitp.h1 https://github.com/comotion/ucspi-tcp/blob/master/haswaitp.h... * https://github.com/comotion/ucspi-tcp/blob/master/haswaitp.h2 https://github.com/comotion/ucspi-tcp/blob/master/haswaitp.h... When I extended redo to the whole of djbwares, this system was fairly simple to convert. Here is haswaitp.h.do which is what redo ends up running whenever something reveals a dependency from haswaitp.h : #!/bin/sh -e redo-ifchange trywaitp.c compile link if ( ./compile trywaitp.o trywaitp.c trywaitp.d && ./link trywaitp trywaitp.o ) >/dev/null 2>&1 then echo \#define HASWAITPID 1 > "$3" else echo '/* sysdep: -waitpid */' > "$3" fi * http://jdebp.eu./Softwares/djbwares/ http://jdebp.eu./Softwares/djbwares/