Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!elroy.jpl.nasa.gov!cit-vax!andy
From: andy@cit-vax.Caltech.Edu (Andy Fyfe)
Newsgroups: comp.windows.x
Subject: gcc 1.37, sun3 version, and X11R4
Message-ID: <13938@cit-vax.Caltech.Edu>
Date: 22 Feb 90 02:52:08 GMT
Reply-To: andy@csvax.caltech.edu (Andy Fyfe)
Organization: California Institute of Technology
Lines: 28

[This message has already been sent to bug-gcc@prep.ai.mit.edu.]

It was previously reported that when the X server was compiled on a sun3
with gcc 1.37 it failed to correctly draw wide lines.  The posting pointed
out that if the file server/ddx/mi/miwideline.c was compiled with cc the
problem went away.  As it turns out, the problem is that the function
hypot() is not declared in the file math-68881.h which we include here
when __HAVE_68881__ is defined.  Gcc assumes hypot() returns an int and
bad things happen.  The following patch adds hypot() to math-68881.h.

Two files need to be recompiled, miwideline.c and miarc.c, as both call
hypot().  [Aside -- using gcc and the inline math functions, the server
Xsun can be build without -lm.]

*** math-68881.h	Wed Feb 14 01:07:28 1990
--- /usr/local/lib/gcc-include/math-68881.h	Wed Feb 21 12:01:32 1990
***************
*** 250,253 ****
--- 250,258 ----
  }
  
+ __inline static const double hypot (const double x, const double y)
+ {
+     return sqrt(x*x + y*y);
+ }
+ 
  __inline static const double pow (const double x, const double y)
  {