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authorIan Lance Taylor <ian@airs.com>1997-01-03 03:13:47 +0000
committerIan Lance Taylor <ian@airs.com>1997-01-03 03:13:47 +0000
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* NOTES, NOTES.config: Removed. These are rarely, if ever,
updated, and all the useful information is in doc/internals.texi.
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1 files changed, 0 insertions, 42 deletions
diff --git a/gas/NOTES.config b/gas/NOTES.config
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-
- The GAS Configuration Plan
-
-Theory:
-
-The goal of the new configuration scheme is to bury all object format
-and target processor dependancies in object and target specific files.
-That is, to move all #ifdef's out of the gas common code.
-
-Here's how it works. There is a .h and a .c file for each object file
-format and a .h and a .c file for each target processor. The
-configure script creates symlinks in the current directory to the
-appropriate files in the config directory. configure also serves as a
-list of triplets {host, target, object-format} that have been tested
-at one time or another. I also recommend that configure be used to
-document triplet specific notes as to purpose of the triplet, etc.
-
-Implementation:
-
-obj-format.h is a {sym}link to .../config/obj-something.h. It is intended
-
-All gas .c files include as.h.
-
-as.h #define's "GAS", includes config.h, defines a number of gas
-specific structures and types, and then includes tc.h, obj.h, and
-targ-env.h.
-
-targ-env.h defines a target environment specific preprocessor flag,
-eg, TE_SUN, and then includes obj-format.h.
-
-obj-format.h defines an object format specific preprocessor flag, eg,
-OBJ_AOUT, OBJ_BOUT, OBJ_COFF, includes "targ-cpu.h", and then defines
-the object specific macros, functions, types, and structures.
-
-targ-cpu.h
-
-targ-cpu.c
-
-Porting:
-
-There appear to be four major types of ports; new hosts, new target
-processors, new object file formats, and new target environments.