The directory \startup and its subdirectories contain the files
necessary for building the startup portion of the C runtime library.
The \startup directory contains the startup source files, the memory
model independent include files, the batch file and the make file used
to build the startup object files. The subdirectories of \startup
contain the memory model dependent include file (version.inc) for the
startup and are the repositories for the object files that get created
by the startup batch file.
The startup object files can be built by invoking startup.bat. This
batch file assumes that the \startup directory and its subdirectories
S, M, C, and L exist and that make.exe, the C compiler and the assembler
are in the execution path. MASM 4.0 or later is required to build the
startup sources with the makefile invoked by startup.bat. The batch
file also assumes that the startup sources are in the same directory as
startup.bat.
The include files stdio.h and ctype.h are required for building the
startup source file wild.c but are not included on the \startup directory
because they exist on the directory containing the standard include files.
A make variable called CINC controls where the makefile looks for these
include files. CINC is currently set to look for these include files in
the \startup directory by the line "CINC=.." in the makefile. The value
of CINC can be changed appropriately if the includes are placed elsewhere.
The message "<cEnd - possible invalid use of nogen>" is generated
when some of the assembly language source files are assembled. This
message is expected and is totally benign.
The startup batch file requires arguments as described in the header of
startup.bat. Invoking startup.bat with no arguments will also give usage
information.
The following files are contained in the \startup directory:
Startup source files:
chkstk.asm
chksum.asm
crt0.asm
crt0dat.asm
crt0fp.asm
crt0msg.asm
execmsg.asm
nmsghdr.asm
setargv.asm
stdalloc.asm
stdenvp.asm
stdargv.asm
_wild.asm
wild.c
Startup include files:
brkctl.inc
cmacros.inc
msdos.inc
register.h
Tools:
dosseg.exe
Make and batch files:
startup.bat: invokes make file to build objs and link to null program
makefile: contains rules for building startup sources
nulbody.c: null c program
nulbody.lnk: link script for linking null program
Documentation:
readme.doc: information about \startup directory structure
and contents
