BSD 4_3_Net_2 development

Work on file usr/src/usr.bin/gcc/cc1/grot/README-X11

Synthesized-from: CSRG/cd2/net.2

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+Our setup:
+
+       Sun 3/60 with cgfour
+       SunOS 4.0 (plus what Sun calls their "general hygiene" patch tape)
+       XV11R3 + MIT fixes 1 through 8 + "Purdue enhancements" + one local
+               "ANSIfication" fix (previously reported to MIT,
+               and attached below)
+
+I installed gcc 1.34 (plus the expr.c fix) and also ran the "fixincludes"
+script.
+
+I built the X stuff with with the "CC" line in the "Sun.macros" file set to:
+
+             CC = gcc -fcombine-regs -fstrength-reduce -finline-functions -fpcc-struct-return -DPURDUE -Dinline=INLINE -DNOSTDHDRS
+
+where -fcombine-regs, -fstrength-reduce, and -finline-functions
+specify desired optimizations, -fpcc-struct-return makes things
+compatible with the dbm library, -DPURDUE buys the Purdue speedups,
+-Dinline=INLINE avoids a problem with a variable named "inline" in the
+X file "fonts/bdftosnf/fontutil.c", and -DNOSTDHDRS avoids a problem
+with multiple (and conflicting) typedef'ing of "size_t" in the
+gcc-provided STDDEF_H and Sun's "sys/types.h".
+
+Some clients may need -fwritable-strings.  twm is said to need it.
+
+The ANSIfication fix:
+
+> From ado Mon Dec 26 10:55:28 1988
+> To: xbugs@expo.lcs.mit.edu
+> Subject: Xlibint and __STDC__ don't mix
+> 
+> 
+>                        X Window System Bug Report
+>                          xbugs@expo.lcs.mit.edu
+> 
+> 
+> 
+> 
+> VERSION:
+>      R3
+> 
+> CLIENT MACHINE and OPERATING SYSTEM:
+>      Sun 3/60 running SunOS 4.0
+> 
+> DISPLAY:
+>      Sun CG4
+> 
+> WINDOW MANAGER:
+>      uwm
+> 
+> AREA:
+>      Xlib
+> 
+> SYNOPSIS:
+>      Xlibint.h and __STDC__ don't mix
+> 
+> DESCRIPTION:
+>      If __STDC__ is defined (and UNIXCPP is not defined),
+>      code that uses the GetReqExtra macro defined in Xlibint.h
+>      is uncompilable.
+> 
+> REPEAT BY:
+>      Script started on Mon Dec 26 10:52:58 1988
+>      elsie$ cd lib/X
+>      elsie$ rm Xbackgnd.o
+>      rm: Xbackgnd.o: No such file or directory
+>      elsie$ rm XBackgnd.o
+>      elsie$ make XBackgnd.o CC=/usr/local/bin/gcc
+>      rm -f XBackgnd.o
+>      /usr/local/bin/gcc -c -O -I. -I../../. -I../.././X11  -DTCPCONN -DUNIXCONN XBackgnd.c
+>      XBackgnd.c: In function XSetWindowBackground:
+>      XBackgnd.c:16: undeclared variable `sz_' (first use here)
+>      *** Error code 1
+>      make: Fatal error: Command failed for target `XBackgnd.o'
+>      elsie$ exit
+> 
+>      script done on Mon Dec 26 10:53:51 1988
+> 
+> SAMPLE FIX:
+>      *** 1.1/Xlibint.h       Mon Dec 26 10:39:37 1988
+>      --- 1.2/Xlibint.h       Mon Dec 26 10:39:37 1988
+>      ***************
+>      *** 122,133 ****
+>        #if defined(__STDC__) && !defined(UNIXCPP)
+>        #define GetReqExtra(name, n, req) \
+>                WORD64ALIGN\
+>      !       if ((dpy->bufptr + SIZEOF(*req) + n) > dpy->bufmax)\
+>                      _XFlush(dpy);\
+>              req = (x##name##Req *)(dpy->last_req = dpy->bufptr);\
+>              req->reqType = X_##name;\
+>      !       req->length = (SIZEOF(*req) + n)>>2;\
+>      !       dpy->bufptr += SIZEOF(*req) + n;\
+>              dpy->request++
+>        #else
+>        #define GetReqExtra(name, n, req) \
+>      --- 122,133 ----
+>        #if defined(__STDC__) && !defined(UNIXCPP)
+>        #define GetReqExtra(name, n, req) \
+>                WORD64ALIGN\
+>      !       if ((dpy->bufptr + SIZEOF(x##name##Req) + n) > dpy->bufmax)\
+>                      _XFlush(dpy);\
+>              req = (x##name##Req *)(dpy->last_req = dpy->bufptr);\
+>              req->reqType = X_##name;\
+>      !       req->length = (SIZEOF(x##name##Req) + n)>>2;\
+>      !       dpy->bufptr += SIZEOF(x##name##Req) + n;\
+>              dpy->request++
+>        #else
+>        #define GetReqExtra(name, n, req) \
+> -- 
+>      Arthur David Olson    ado@ncifcrf.gov    ADO is a trademark of Ampex.
+