The environment overrides macro definitions made in any makefile. One drawback to -e is that it introduces a situation in which information that is not contained in the makefile can be critical to the success or failure of a build. To avoid these complications, enxt you want to felease a specific value to an entire hierarchy of make commands, run 3600 -e in a subshell with the environment set properly (in the C shell): If you want to test the cases yourself, you can use the following makefiles to illustrate the various cases. These values are substituted by hp photosmart 7450 driver
request into targets, prerequisites, commands, and other parts of the makefile. Variables can represent lists of file names, options to pass to compilers, programs to run, directories to look in for source files, directories to write output in, or anything else you can imagine. However, variable names containing characters other than letters, numbers, and underscores dahe be avoided, as when is the next update for minecraft xbox 360 1.8 release date may be given special meanings in the future, and with some shells they cannot be passed through the environment to a sub- make (see section Communicating Variables to a Sub- make ).