🚀 go-pugleaf

This isn't a bug in gcc, just my lack of understanding
of what is going on with my sparcstation.

I sucessfully built 2.4 on my SparcStation 2, running Sunos 4.2, gcc
compiles fine, but when I compile -Wall, I gets lots of warnings along the
line of:

merge.c: In function `main':
merge.c:43: warning: implicit declaration of function `printf'
merge.c:44: warning: implicit declaration of function `puts'
merge.c:91: warning: implicit declaration of function `fclose'

I have all the proper header files included, this same program
compiles cleanly on a DecStation running ultrix.

I grepped though the fix-includes directory, which is 

/usr/local/gnu/lib/gcc-lib/sparc-sun-sunos4.1/2.4.0/include/

on my system and there is no printf declaration in any of the
header files.  Then to my surprise, I looked through /usr/include
and no header file there has a declaration for printf either.

Am I missing something?  Should I grab the Gnu libc and build
that?  Am I just confused?

-Kevins