2.3 The Build Script
The first step in compiling sendmail is to establish an object directory and a Makefile that is appropriate to your machine architecture and operating system. You do this by running the Build script in the sendmail source directory:[3]
[3] This same Build script is also used to build all the support programs, such as mailstats, smrsh(1), and mail.local(1). We describe support programs in Chapter 5.
% cd sendmail % ./Build -n Configuration: pfx=, os=SunOS, rel=4.1.4, rbase=4, rroot=4.1, arch=sun4, sfx= Using M4=/usr/5bin/m4 Creating ../obj.SunOS.4.1.4.sun4/sendmail using ../devtools/OS/SunOSmany more lines here %
Here, Build found that our machine was a sun4, running the SunOS 4.1.4 release of Unix. Build then created the working directory ../obj.SunOS.4.1.4.sun4, set up symbolic links to all the source files in that directory, and finally generated a Makefile there.
The Build program understands several command-line switches that can be used to modify its behavior (see Table 2-2). Any switch or other command-line argument that is not in that table is carried through and passed as is to the make(1) program. For example, specifying the -n switch to Build (in the earlier example) caused Build to pass that switch to make(1), thereby preventing make(1) from actually building sendmail.
|
Switch |
§ |
Description |
|---|---|---|
|
-A |
-A |
Show the architecture for the build. |
|
-c |
-c |
Clean out an existing object tree. |
|
-E |
-E |
Pass environment variables to build. |
|
-f |
-f |
Use site file in alternative directory. |
|
-I |
-I |
Add additional include directories. |
|
-L |
-L |
Add additional library directories. |
|
-m |
-m |
Show but don't create the directory. |
|
-M |
-M |
Show the name of the object directory. |
|
-O |
-O |
Specify the path of the object directory. |
|
-Q |
-Q |
Set prefix for the object directory and Build m4 configuration file. |
|
-S |
-S |
Skip system-specific configuration. |
