Command Reference Guide
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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man1/!!!intro.1
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m
make(1) make(1)
be used in target rules in the makefile. They can also be redefined in the makefile.
$$@ The $$@ macro has meaning only on dependency lines. Macros of this form are called
dynamic dependencies because they are evaluated at the time the dependency is
actually processed. $$@ evaluates to exactly the same thing as $@ does on a com-
mand line; i.e., the current target name. This macro is useful for building large
numbers of executable files, each of which has only one source file. For instance, the
following HP-UX commands could all be built using the same rule:
CMDS = cat echo cmp chown
$(CMDS) : $$@.c
$(CC) -O $? -o $@
If this makefile is invoked with make cat echo cmp chown, make builds each
target in turn using the generic rule, with $$@ evaluating to cat while cat is the
target, to echo when the target is echo, and so forth.
The dynamic dependency macro can also take the F form, $$(@F) which represents
the filename part of $$@. This is useful if the targets contain pathnames. For exam-
ple:
INCDIR = /usr/include
INCLUDES = $(INCDIR)/stdio.h \
$(INCDIR)/pwd.h \
$(INCDIR)/dir.h \
$(INCDIR)/a.out.h
$(INCLUDES) : $$(@F)
cp $? $@
chmod 0444 $@
Special Macros
The VPATH macro allows make to search a colon separated list of directories for dependents. Lines of the
form VPATH= path1:path2 ... causes make to first search the current directory for a dependent and if the
dependent is not found, make searches path1 and continues until the directories specified in the VPATH
macro are exhausted.
EXTERNAL INFLUENCES
Environment Variables
LANG provides a default value for the internationalization variables that are unset or null. If
LANG is unset
or null, the default value of "C" (see lang(5)) is used. If any of the internationalization variables contains an
invalid setting,
make will behave as if all internationalization variables are set to "C". See environ(5).
LC_ALL If set to a non-empty string value, overrides the values of all the other internationalization vari-
ables.
LC_CTYPE determines the interpretation of text as single and/or multi-byte characters, the classification
of characters as printable, and the characters matched by character class expressions in regular expres-
sions.
LC_MESSAGES determines the locale that should be used to affect the format and contents of diagnostic
messages written to standard error and informative messages written to standard output.
NLSPATH determines the location of message catalogues for the processing of LC_MESSAGES.
PROJECTDIR provides a directory to be used to search for SCCS files not found in the current directory.
In all of the following cases, the search for SCCS files will be made in the directory
SCCS in the identified
directory. If the value of
PROJECTDIR begins with a slash, it is considered an absolute pathname; other-
wise, the home directory of a user of that name is examined for a subdirectory src or source. If such a
directory is found, it is used. Otherwise, the value is used as a relative pathname.
If PROJECTDIR is not set or has a null value, the current directory is searched first, followed by a search
in the SCCS directory in the current directory.
The setting of PROJECTDIR affects all files listed in the remainder of this utility description for files with
a component named SCCS.
Section 1−−516 − 9 − HP-UX Release 11i: December 2000
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