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GENASSYM.SH(8)            BSD System Manager's Manual           GENASSYM.SH(8)

     genassym.sh -- emit an assym.h file

     sh genassym.sh [-c] C compiler invocation

     genassym.sh is a shell script normally used during the kernel build
     process to create an assym.h file.  This file defines a number of cpp
     constants derived from the configuration information genassym.sh reads
     from stdin. The generated file is used by kernel sources written in
     assembler to gain access to information (e.g. structure offsets and
     sizes) normally only known to the C compiler.  genassym.sh resides in the
     /sys/kern directory. Arguments to genassym.sh 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.sh instructs the C compiler to create an assem-
     bler 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.sh to create slightly different code, gen-
     erate an executable from this code and run it. In both cases the assym.h
     file is written to stdout.

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


     The genassym.sh command appeared in NetBSD 1.3.

BSD                            January 25, 1997                            BSD