89 lines
3.1 KiB
Plaintext
89 lines
3.1 KiB
Plaintext
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C Runtime Library Startup Sources
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---------------------------------
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The directory \startup and its subdirectories contain the files
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necessary for building the startup portion of the C runtime library.
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The \startup directory contains the startup source files, the include
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include files, the batch file and the make file used to build the startup
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object files. The subdirectories of \startup contain OS specific sources.
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The startup object files can be built by invoking startup.bat from within
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the \startup directory. This batch file assumes the following:
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(1) make.exe, link.exec, the C compiler, and the assembler must be
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in the execution path. MASM 5.0 and C 5.0 or later are required to
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build the startup sources.
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(2) doscalls.lib must be in the directory specified by the LIB
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environment variable.
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Startup will create four memory model specific subdirectories (i.e., S, M, C,
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and L) and place the appropriate object files there. Under each memory model
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subdirectory, startup creates two addition subdirectories OS2 and DOS where
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OS specific objects reside.
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The include files stdio.h and ctype.h are required for building the
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startup source file wild.c but are not included on the \startup directory
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because they exist on the directory containing the standard include files.
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A make variable called CINC controls where the makefile looks for these
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include files. STARTUP.BAT sets CINC to the current value of the INCLUDE
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environment variable. This variable should be set to the location of
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the C include files. CINC can also be set in the makefile if you wish
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to run the makefile separately.
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The message "<cEnd - nogen>" is generated when some of the assembly language
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source files are assembled. This message is expected and is totally benign.
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The startup batch file requires as arguments a list of capital letters
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describing the memory models you wish to build. For example,
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"startup S L" will build the small and large model startup objects.
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Startup will then link the objects with a sample C program called nulbody.c
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(consisting of a null main functions) to produce nulbody.exe.
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[Invoking startup.bat with no arguments will give usage information.]
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Note: startup sources written in assembly language have been edited with
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tabstops set to 8. Startup sources written in C have been edited with
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tabstops set to 4.
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The following files are contained in the \startup directory:
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Startup source files (OS independent):
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chkstk.asm
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chksum.asm
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crt0fp.asm
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setargv.asm
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wild.c
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Startup source files (OS specific):
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crt0.asm
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crt0dat.asm
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crt0msg.asm
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execmsg.asm
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nmsghdr.asm
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stdalloc.asm
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stdenvp.asm
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stdargv.asm
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Startup include files:
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brkctl.inc
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cmacros.inc
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msdos.inc
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register.h
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msdos.h
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version.inc
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File count files:
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_file.c
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file2.h
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Make and batch files:
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startup.bat: invokes make file to build objs and link to null program
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makefile: contains rules for building startup sources
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nulbody.c: null c program
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nulbody.lnk: link script for linking null program
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Documentation:
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readme.doc: information about \startup directory structure
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and contents
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--- End ---
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