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[Bug target/14537] sparc-rtems predefines unix

From: joel at gcc dot gnu dot org
Subject: [Bug target/14537] sparc-rtems predefines unix
Date: 11 Mar 2004 20:24:14 -0000

------- Additional Comments From joel at gcc dot gnu dot org  2004-03-11 20:24 

Based upon a review of config.gcc, I believe sparc-elf, sparc64-elf and 
sparclite-elf have the same problem since they include the solaris specific
config/sparc files.

The embedded sparc targets could probably be modified in a similar way and
longer term all share some common underlying file(s).

This has been a lurking issue but not a critical one.  We added a stub for
mprotect() to RTEMS a long time ago to workaround this the first time.  
But now the gnat run-time checks for defined(unix) and decides 
it is on a unix box instead of an embedded sparc.  This results
in real breakage.

Given the complexity of the conditionals in some of the Ada run-time code, I
wouldn't be surprised if they have discovered other cpp predefine 
inconsistencies and are covering them up.  Look at gcc/ada/init.c and
gcc/ada/sysdep.c have some pretty complicated conditionals.  I have to
wonder if some vxworks target doesn't have this problem based upon this
code from ctrl_c.c:

#if (defined (_AIX) || defined (unix)) && !defined (__vxworks)

which I read as meaning there is some VxWorks target with unix defined.


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