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Annotation of gcc/README.CRDS, revision 1.1

1.1     ! root        1: Support for CRDS machines was contributed by Gary E. Miller
        !             2: ([email protected])
        !             3: 
        !             4: This file describes the implementation notes of the GNU C Compiler for
        !             5: the Motorola 68000 on the Charles River Dat Systems Universe 32 running
        !             6: the UNOS operating system.
        !             7: 
        !             8: This release still depends on the CRDS supplied assembler.
        !             9: The CRDS assembler has no provision for assembling debug information
        !            10: so the -g option is broken.
        !            11: 
        !            12: The UNOS assembler is named "casm" instead of "as".
        !            13: For some strange reason linking "/bin/casm" to "/bin/as" changes the
        !            14: behavior of casm for the worse.  To allow GCC to function either
        !            15: change all references to "as" in gcc.c to "casm", or create the
        !            16: following shell script named /bin/as:
        !            17:        #!/bin/sh
        !            18:        casm $*
        !            19: 
        !            20: The default UNOS library is named "libunos.a" instead of "libc.a".  To allow
        !            21: GCC to function either change all references to "-lc" in gcc.c to "-lunos" or
        !            22: link "/lib/libunos.a" to "/lib/libc.a".
        !            23: 
        !            24: UNOS uses memory segmentation instead of demand paging so you will need 
        !            25: a LOT of RAM. 5 Mb is just barely enough to get by on if no other tasks
        !            26: are running.  if CC1 is too large to link on your machine try putting
        !            27: the object files in a library and linking from that library.
        !            28: 
        !            29: alloca() expects that the C compiler pops the stack after every function
        !            30: call.  The Green Hills C compiler verion 1.8.0 supplied with UNSO does not.
        !            31: This behavior causes some programs (GNU make) to crash, and others to merely
        !            32: grow unbounded (GCC).  To avoid this problem do not use -O in stage1/stage2,
        !            33: and set CFLAGS=-Wx,-X23 to force Green Hills to pop the stack more often.
        !            34: After stage2 builds properly then use GCC with the builtin_alloca to compile
        !            35: an optimized version of GCC as stagees 3 and 4.
        !            36: 
        !            37: The file cccp.c has been modified so that the GNU cpp checks the
        !            38: default UNOS location /include for include files as well as all the 
        !            39: standard places.
        !            40: 
        !            41: Before compiling be sure config/crds.h is linked to tm.h, and
        !            42: config/xm-crds.h is linked to config.h.
        !            43: 
        !            44: 

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