143 lines
3.2 KiB
Groff
143 lines
3.2 KiB
Groff
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.TH ccmakedep 1 __xorgversion__
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.SH NAME
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ccmakedep \- create dependencies in makefiles using a C compiler
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.SH SYNOPSIS
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.B ccmakedep
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[
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.BI cpp-flags
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] [
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.BI \-w width
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] [
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.BI \-s magic-string
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] [
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.BI \-f makefile
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] [
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.BI \-o object-suffix
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] [
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.B \-v
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] [
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.B \-a
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] [
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.BI \-cc compiler
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] [
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\-\^\-
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.I options
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\-\^\-
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]
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.I sourcefile
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\^.\|.\|.
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.SH DESCRIPTION
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The
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.B ccmakedep
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program calls a C compiler to preprocess each
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.IR sourcefile ,
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and uses the output to construct
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.I makefile
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rules describing their dependencies.
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These rules instruct
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.BR make (1)
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on which object files must be recompiled when a dependency has changed.
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.PP
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By default,
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.B ccmakedep
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places its output in the file named
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.I makefile
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if it exists, otherwise
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.I Makefile.
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An alternate makefile may be specified with the
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.B \-f
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option.
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It first searches the makefile for a line beginning with
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.sp
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\& # DO NOT DELETE
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.sp
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or one provided with the
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.B \-s
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option, as a delimiter for the dependency output.
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If it finds it, it will delete everything following this up to the end of
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the makefile and put the output after this line.
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If it doesn't find it, the program will append the string to the makefile
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and place the output after that.
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.SH EXAMPLE
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Normally,
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.B ccmakedep
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will be used in a makefile target so that typing 'make depend' will bring
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the dependencies up to date for the makefile.
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For example,
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.nf
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SRCS\0=\0file1.c\0file2.c\0.\|.\|.
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CFLAGS\0=\0\-O\0\-DHACK\0\-I\^.\^.\^/foobar\0\-xyz
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depend:
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ccmakedep\0\-\^\-\0$(CFLAGS)\0\-\^\-\0$(SRCS)
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.fi
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.SH OPTIONS
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The program will ignore any option that it does not understand, so you may
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use the same arguments that you would for
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.BR cc (1),
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including
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.B \-D
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and
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.B \-U
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options to define and undefine symbols and
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.B \-I
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to set the include path.
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.TP
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.B \-a
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Append the dependencies to the file instead of replacing existing
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dependencies.
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.TP
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.BI \-cc compiler
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Use this compiler to generate dependencies.
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.TP
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.BI \-f makefile
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Filename.
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This allows you to specify an alternate makefile in which
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.B ccmakedep
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can place its output.
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Specifying \(lq\-\(rq as the file name (that is,
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.BR \-f\- )
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sends the output to standard output instead of modifying an existing file.
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.TP
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.BI \-s string
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Starting string delimiter.
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This option permits you to specify a different string for
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.B ccmakedep
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to look for in the makefile.
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The default is \(lq# DO NOT DELETE\(rq.
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.TP
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.BI \-v
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Be verbose: display the C compiler command before running it.
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.TP
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.BI \-\^\- " options " \-\^\-
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If
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.B ccmakedep
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encounters a double hyphen (\-\^\-) in the argument list, then any
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unrecognized arguments following it will be silently ignored.
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A second double hyphen terminates this special treatment.
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In this way,
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.B ccmakedep
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can be made to safely ignore esoteric compiler arguments that might
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normally be found in a CFLAGS
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.B make
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macro (see the
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.B EXAMPLE
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section above).
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.BR \-D ,
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.BR \-I ,
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and
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.B \-U
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options appearing between the pair of double hyphens are still processed
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normally.
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.SH "SEE ALSO"
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.BR cc (1),
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.BR make (1),
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.BR makedepend (1),
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.BR ccmakedep (1).
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.SH AUTHOR
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.B ccmakedep
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was written by the X Consortium.
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.PP
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Colin Watson wrote this manual page, originally for the Debian Project,
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based partly on the manual page for
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.BR makedepend (1).
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