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+.TH gccmakedep 1 __vendorversion__
+.SH NAME
+gccmakedep \- create dependencies in makefiles using 'gcc -M'
+.SH SYNOPSIS
+.B gccmakedep
+[
+.BI \-s separator
+] [
+.BI \-f makefile
+] [
+.BI \-a
+] [
+\-\^\-
+.I options
+\-\^\-
+]
+.I sourcefile
+\&.\|.\|.
+.SH DESCRIPTION
+The
+.B gccmakedep
+program calls 'gcc -M' to output
+.I makefile
+rules describing the dependencies of each
+.IR sourcefile ,
+so that
+.BR make (1)
+knows which object files must be recompiled when a dependency has changed.
+.PP
+By default,
+.B gccmakedep
+places its output in the file named
+.I makefile
+if it exists, otherwise
+.I Makefile.
+An alternate makefile may be specified with the
+.B \-f
+option.
+It first searches the makefile for a line beginning with
+.sp
+\&    # DO NOT DELETE
+.sp
+or one provided with the
+.B \-s
+option, as a delimiter for the dependency output.
+If it finds it, it will delete everything following this up to the end of
+the makefile and put the output after this line.
+If it doesn't find it, the program will append the string to the makefile
+and place the output after that.
+.SH EXAMPLE
+Normally,
+.B gccmakedep
+will be used in a makefile target so that typing 'make depend' will bring
+the dependencies up to date for the makefile.
+For example,
+.nf
+    SRCS\0=\0file1.c\0file2.c\0.\|.\|.
+    CFLAGS\0=\0\-O\0\-DHACK\0\-I\^.\^.\^/foobar\0\-xyz
+    depend:
+            gccmakedep\0\-\^\-\0$(CFLAGS)\0\-\^\-\0$(SRCS)
+.fi
+.SH OPTIONS
+The program will ignore any option that it does not understand, so you may
+use the same arguments that you would for
+.BR gcc (1),
+including
+.B \-D
+and
+.B \-U
+options to define and undefine symbols and
+.B \-I
+to set the include path.
+.TP
+.B \-a
+Append the dependencies to the file instead of replacing existing
+dependencies.
+.TP
+.BI \-f makefile
+Filename.
+This allows you to specify an alternate makefile in which
+.B gccmakedep
+can place its output.
+Specifying \(lq\-\(rq as the file name (that is,
+.BR \-f\- )
+sends the output to standard output instead of modifying an existing file.
+.TP
+.BI \-s string
+Starting string delimiter.
+This option permits you to specify a different string for
+.B gccmakedep
+to look for in the makefile.
+The default is \(lq# DO NOT DELETE\(rq.
+.TP
+.BI \-\^\- " options " \-\^\-
+If
+.B gccmakedep
+encounters a double hyphen (\-\^\-) in the argument list, then any
+unrecognized arguments following it will be silently ignored.
+A second double hyphen terminates this special treatment.
+In this way,
+.B gccmakedep
+can be made to safely ignore esoteric compiler arguments that might
+normally be found in a CFLAGS
+.B make
+macro (see the
+.B EXAMPLE
+section above).
+.BR \-D ,
+.BR \-I ,
+and
+.B \-U
+options appearing between the pair of double hyphens are still processed
+normally.
+.SH "SEE ALSO"
+.BR gcc (1),
+.BR make (1),
+.BR makedepend (1).
+.SH AUTHOR
+The version of the 
+.B gccmakedep
+included in this X.Org Foundation release was originally 
+written by the XFree86 Project based on code supplied by Hongjiu Lu.
+.PP
+Colin Watson wrote this manual page, originally for the Debian Project,
+based partly on the manual page for
+.BR makedepend (1).