Re: [9fans] plan 9 software for unix

[northern snowfall <dbailey27@ameritech.net>]

libbio compiles a.o.k. on SunOS-sun4u with the Linux makefile (using
GCC. I dont have a spro licence).
libregexp9-10 compiles fine.

With libfmt I get a warning:
    gcc -Wall -Wno-missing-braces -Wno-parentheses -Wno-switch -O2 -g -c
fltfmt.c
    fltfmt.c: In function `xdodtoa':
    fltfmt.c:180: warning: implicit declaration of function `isinf'
which manifests later when linking:
    blueberry.north_ % make test
    gcc -o test test.c libfmt.a
    Undefined                       first referenced
     symbol                             in file
    isinf                               libfmt.a(fltfmt.o)
    ld: fatal: Symbol referencing errors. No output written to test
    collect2: ld returned 1 exit status
    make: *** [test] Error 1
    blueberry.north_ %

Apparently Solaris 2.9 doesn't have isinf in its libc. It does, however,
have
isnan() and finite(). finite() returns TRUE(1) if the argument is
neither infinity nor
NaN. isnan() returns TRUE if the argument is NaN. Therefore,
    if(finite(x) == FALSE && isnan(x) == FALSE) {
        // infinite found
    }

I guess you could ifdef a macro in based on underlying architecture in
the source and
-Dx in the Makefile, but, it seems very non-plan9 to be so crude for
just one function.
Then again, creating an external dependency file seems crude for one
function as well...
Don