Path: utzoo!utgpu!water!watmath!uunet!tut.cis.ohio-state.edu!dufay.umb.edu!karl
From: karl@dufay.umb.edu ("Karl Berry.")
Newsgroups: gnu.gcc.bug
Subject: Problem with structure returns in gcc 1.30.
Message-ID: <8810241755.AA04548@dufay.cs>
Date: 24 Oct 88 17:55:52 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 45

The following program dies with a segmentation fault on a Sun 3
running Sun OS 3.4, compiled with gcc 1.30.
The same program compiles correctly with the Sun C compiler.

Here is the program:
typedef struct {
   int max_row, max_col, min_row, min_col;
} bounding_box_type;
bounding_box_type get_bounding_box();

main()
{
   bounding_box_type b;
   
   b = get_bounding_box();
   printf("%d", b.max_row);
}

bounding_box_type get_bounding_box()
{
   bounding_box_type bb;
   
   bb.max_row = 10;
   bb.min_row = 0;
   bb.max_col = 20;
   bb.min_col = 5;
   
   return bb;
}


and here is the compilation:
 /usr/local/gnu/lib/gcc-cpp -v -undef -D__GNU__ -D__GNUC__ -Dmc68000 -Dsun -Dunix -D__HAVE_68881__ -Dmc68020 x.c /tmp/cca04532.cpp
GNU CPP version 1.30
 /usr/local/gnu/lib/gcc-cc1 /tmp/cca04532.cpp -quiet -dumpbase x.c -version -o /tmp/cca04532.s
GNU C version 1.30 (68k, MIT syntax) compiled by GNU C version 1.30.
 as -mc68020 /tmp/cca04532.s -o x.o
 ld /lib/crt0.o /lib/Mcrt1.o x.o /usr/local/gnu/lib/gcc-gnulib -lc



And the run just says ``Segmentation fault (core dumped)''.

Karl.   karl@umb.edu
`.