[Bug ada/19489] gnat tools not buildable cross

["joel at oarcorp dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From joel at oarcorp dot com  2005-02-08 19:16 -------
Subject: Re:  gnat tools not buildable cross

neroden at gcc dot gnu dot org wrote:
> ------- Additional Comments From neroden at gcc dot gnu dot org  2005-02-08 18:30 -------
> 
>>Is a fix likely to get into 4.0? 
> 
> Yes, the hackish fix is in.  I hope to get the cleaner fix in, but who knows. 
>  
> 
>>FYI Once I am able to build, the next issue is that the Ada libraries 
>>do not look into newlib's headers and do not have a way to let a 
>>target add specific include directories.  See gcc/config/t-rtems for 
>>the OS specific newlib include directory we need.  With that resolved, 
>>I think it could build in a single pass. 
> 
> I wouldn't want to touch this until substantially more of the branch went in, 
> so that's probably a 4.1 issue. 

I need to get to test this first but I think the mistake in the 
gcc/ada/Makefile.in is actually quite simple.  It has this:


GNATLIBCFLAGS_FOR_C = $(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS) 
-fexceptions \
         -DIN_RTS


$(TARGET_LIBGCC2_CFLAGS) is not sufficient to find all the newlib
headers.  But the gcc/Makefile.in also uses $(LIBGCC2_INCLUDES) which is
target specific when compiling libgcc2.  LIBGCC2_INCLUDES is primarily 
set by RTEMS, VxWorks, and Cygwin.

What do you think?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19489