diff options
Diffstat (limited to 'usr.bin/make/make.1')
| -rw-r--r-- | usr.bin/make/make.1 | 45 |
1 files changed, 25 insertions, 20 deletions
diff --git a/usr.bin/make/make.1 b/usr.bin/make/make.1 index 1b997ab89fef..89a1e3fec902 100644 --- a/usr.bin/make/make.1 +++ b/usr.bin/make/make.1 @@ -30,7 +30,7 @@ .\" SUCH DAMAGE. .\" .\" from: @(#)make.1 8.4 (Berkeley) 3/19/94 -.\" $Id: make.1,v 1.10 1997/03/09 15:50:58 wosch Exp $ +.\" $Id: make.1,v 1.11 1997/07/24 06:58:07 charnier Exp $ .\" .Dd March 19, 1994 .Dt MAKE 1 @@ -551,35 +551,40 @@ is the substring of to be replaced in .Ar new_string .El -.Sh INCLUDE STATEMENTS, CONDITIONALS AND FOR LOOPS -Makefile inclusion, conditional structures and for loops reminiscent +.Sh DIRECTIVES, CONDITIONALS AND FOR LOOPS +Directives, conditionals and for loops reminiscent of the C programming language are provided in .Nm make . All such structures are identified by a line beginning with a single dot .Pq Ql \&. -character. -Files are included with either -.Ql .include <file> -or -.Ql .include \*qfile\*q . -Variables between the angle brackets or double quotes are expanded -to form the file name. -If angle brackets are used, the included makefile is expected to be in -the system makefile directory. -If double quotes are used, the including makefile's directory and any -directories specified using the +character. The following directives are supported: +.Bl -tag -width Ds +.It Ic \&.include Ar <file> +.It Ic \&.include Ar \*qfile\*q +Include the specified makefile. Variables between the angle brackets +or double quotes are expanded to form the file name. If angle brackets +are used, the included makefile is expected to be in the system +makefile directory. If double quotes are used, the including +makefile's directory and any directories specified using the .Fl I option are searched before the system makefile directory. -.Pp -Conditional expressions are also preceded by a single dot as the first -character of a line. -The possible conditionals are as follows: -.Bl -tag -width Ds -.It Ic .undef Ar variable +.It Ic \&.undef Ar variable Un-define the specified global variable. Only global variables may be un-defined. +.It Ic \&.error Ar message +Terminate processing of the makefile immediately. The filename of the +makefile, the line on which the error was encountered and the specified +message are printed to standard output and +.Nm make +terminates with exit code 1. Variables in the message are expanded. +.El +.Pp +Conditionals are used to determine which parts of the Makefile +to process. They are used similarly to the conditionals supported +by the C pre-processor. The following conditionals are supported: +.Bl -tag -width Ds .It Xo .Ic \&.if .Oo \&! Oc Ns Ar expression |