genassym(1) [netbsd man page]

GENASSYM(1)						    BSD General Commands Manual 					       GENASSYM(1)

NAME

     genassym -- emit an assym.h file

SYNOPSIS

     genassym [-c] [-f] C compiler invocation

DESCRIPTION

     genassym is a shell script normally used during the kernel build process to create an assym.h file.  This file defines a number of cpp con-
     stants derived from the configuration information genassym reads from stdin. The generated file is used by kernel sources written in assem-
     bler to gain access to information (e.g. structure offsets and sizes) normally only known to the C compiler.

     Arguments to genassym are usually of the form ${CC} ${CFLAGS} ${CPPFLAGS} where ${CC} is the C compiler used to compile the kernel, while
     ${CFLAGS} and ${CPPFLAGS} are flag arguments to the C compiler. The script creates a C source file from its input. Then the C compiler is
     called according to the script's arguments to compile this file.

     Normally genassym instructs the C compiler to create an assembler source from the constructed C source. The resulting file is then processed
     to extract the information needed to create the assym.h file. The -c flag instructs genassym to create slightly different code, generate an
     executable from this code and run it. In both cases the assym.h file is written to stdout.  The -f flag instructs genassym to create forth
     code.

DIAGNOSTICS

     Either self-explanatory, or generated by one of the programs called from the script.

SEE ALSO

     genassym.cf(5)

HISTORY

     The genassym command appeared in NetBSD 1.3 as ``genassym.sh'' in /usr/src/sys/kern.  It became a userland utility in NetBSD 4.0.

BSD
								  April 13, 2010							       BSD

MKDEP(1)						    BSD General Commands Manual 						  MKDEP(1)

NAME

     mkdep -- construct Makefile dependency list

SYNOPSIS

     mkdep [-ap] [-f file] [flags] file ...

DESCRIPTION

     The mkdep utility takes a set of flags for the C compiler and a list of C source files as arguments and constructs a set of include file
     dependencies which are written into the file ``.depend''.	An example of its use in a Makefile might be:

	   CFLAGS= -O -I../include
	   SRCS= file1.c file2.c

	   depend:
		   mkdep ${CFLAGS} ${SRCS}

     where the macro SRCS is the list of C source files and the macro CFLAGS is the list of flags for the C compiler.

     The user has the ability to change the preprocessor and preprocessor options used.  For instance, to use gcc as the preprocessor and to
     ignore system headers, one would use

	   depend:
		   env MKDEP_CPP="gcc -E" MKDEP_CPP_OPTS=-MM mkdep 
			   ${CFLAGS} ${SRCS}

     The options are as follows:

     -a      Append to the output file, so that multiple mkdep's may be run from a single Makefile.

     -f      Write the include file dependencies to file, instead of the default ``.depend''.

     -p      Cause mkdep to produce dependencies of the form:

		   program: program.c

	     so that subsequent makes will produce program directly from its C module rather than using an intermediate .o module.  This is useful
	     for programs whose source is contained in a single module.

ENVIRONMENT

     CC 	     Specifies the C compiler to use.  The specified compiler is expected to have options consistent with the GNU C compiler.

     MKDEP_CPP	     Specifies the preprocessor to use.  The default is "${CC} -E".

     MKDEP_CPP_OPTS  Specifies the non-CFLAGS options for the preprocessor.  The default is "-M".

FILES

     .depend  File containing list of dependencies.

SEE ALSO

     cc(1), cpp(1), make(1)

HISTORY

     The mkdep command appeared in 4.3BSD-Tahoe.

BSD
								   June 6, 1993 							       BSD