file 4.22 build fails on Solaris 9 due to strtof()

[Zube]

On Solaris 9 sparc fully patched, building with gcc 3.4.6:

gmake[2]: Entering directory `/stat/src/file/file-4.22/src'
/bin/bash ../libtool --tag=CC   --mode=link gcc  -O2   -o file file.o libmagic.la -lz 
gcc -O2 -o .libs/file file.o  ./.libs/libmagic.so -lz -R/usr/local/lib
Undefined                       first referenced
 symbol                             in file
strtof                              ./.libs/libmagic.so
ld: fatal: Symbol referencing errors. No output written to .libs/file
collect2: ld returned 1 exit status

strtof() seems to have crept into apprentice.c (it wasn't in file 4.21),
but I don't think Solaris 9 has it.

Cheers,
Zube