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List:       gcc-bugs
Subject:    Re: target/9603: SCO 5 build of gcc-3.2.2 fails with i386.c: line 927: error: undefined symbol: DEFA
From:       "John Hughes" <john () Calva ! COM>
Date:       2003-02-26 14:32:50
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http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=g
cc&pr=9603

and

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=g
cc&pr=9583 

This bug is also present on UnixWare 7.1.1 (aka svr5) and
I'd guess all other versions of svr4.

It's still present in the 2003/02/24 snapshot of 3.3.

For svr4 systems the fix is:

--- gcc-20030224/gcc/config/i386/sysv4.h.orig   Sun Jun 16 23:13:11 2002
+++ gcc-20030224/gcc/config/i386/sysv4.h        Wed Feb 26 14:35:08 2003
@@ -23,6 +23,14 @@
 
 #define TARGET_VERSION fprintf (stderr, " (i386 System V Release 4)");
 
+#if 0
+
+/* i386.h says:
+
+   Do not use this macro to indicate that structures and unions
+   should always be returned in memory.  You should instead use
+   `DEFAULT_PCC_STRUCT_RETURN' to indicate this.  */
+
 /* The svr4 ABI for the i386 says that records and unions are returned
    in memory.  */
 
@@ -30,6 +38,12 @@
 #define RETURN_IN_MEMORY(TYPE) \
   (TYPE_MODE (TYPE) == BLKmode \
    || (VECTOR_MODE_P (TYPE_MODE (TYPE)) && int_size_in_bytes (TYPE) ==
8))
+
+#else
+
+#define DEFAULT_PCC_STRUCT_RETURN 1
+
+#endif
 
 /* Output at beginning of assembler file.  */
 /* The .file command should always begin the output.  */

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