[racket] USE_SINGLE_FLOATS_AS_DEFAULT stops racket-5.1.1 build on Solaris x86

From: Tim Brown (tim.brown at cityc.co.uk)
Date: Mon May 23 08:04:02 EDT 2011

Continuing with Solaris build (environment at foot of mail)...

Now I've got a weird one..

This seems to be the first use of xform.rkt, so I'm not sure if this is
an issue with xform or the source file itself.

The error is in atan_prim(); the declarations at the head of the function
   double v;
   Scheme_Object *n1;
   int dbl = 0;
# define MZ_USE_SINGLE !dbl
# else
#warning "single declared (tim added this warning!)"
   int single = 0;
# define MZ_USE_SINGLE single == 2

And each of the errors (e.g. the one on 2210) is caused by the block:
   else if (SCHEME_FLTP(n1)) {
     v = SCHEME_FLT_VAL(n1);
     single ++;   //<<-- this is the single that is a variable definition,
                  //     not at the beginning of the block
# endif

The xform output shows the warning that I added, but it doesn't see
that single has been defined.

gmake xobjects
gmake[4]: Entering directory 
env XFORM_USE_PRECOMP=xsrc/precomp.h ../racketcgc -cqu 
../../../racket/gc2/xform.rkt --setup . --cpp "gcc -E -I./.. 
-I../../../racket/gc2/../include -DNEWGC_BTC_ACCOUNT  -D_LARGEFILE_SOURCE 
-D_FILE_OFFSET_BITS=64 "  --keep-lines -o xsrc/number.c 
../../../racket/gc2/../src/number.c:2196:2: warning: #warning single declared
Error [DECL] 2304 in ../../../racket/gc2/../src/number.c: Variable 
declaration (single ++) not at the beginning of a block.
Error [DECL] 2258 in ../../../racket/gc2/../src/number.c: Variable 
declaration (single ++) not at the beginning of a block.
Error [DECL] 2210 in ../../../racket/gc2/../src/number.c: Variable 
declaration (single ++) not at the beginning of a block.
xform: Errors converting

uname -a:  SunOS ... 5.10 Generic_138889-03 i86pc i386 i86pc

racket:    racket-5.1.1-src-unix.tgz  -- only building on this a.t.m.

configure: ../configure --srcdir=.. --prefix=/usr/local CC=gcc CXX=g++
            (I'm using a target-specific build directory)

gcc:       gcc (GCC) 3.4.3 (csl-sol210-3_4-branch+sol_rpath)



Tim Brown <tim.brown at cityc.co.uk>  | City Computing Limited            |
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