gnat compilation fails with missing symbols

gnat compilation fails with missing symbols

[Andreas Jungmaier]

Hello all,

in my quest :) for compiling gcc with gnat from the  sources,
I have stumbled across the following message several times,
regardless whether I do this with gcc-2.7.2.1, gcc-2.7.2.3 or 
even gcc-2.8.1, so I am not sure what is going wrong.
In the bind/link part of compilation in the ada-dir, when

gcc  -DIN_GCC   -O2   -o ../gnat1 `cat ../stamp-objlist` b_gnat1.o....

is run, followed by a long list of object files, that pops up:
a-misc.o: In function `yyparse':
a-misc.o(.text+0x16): undefined reference to `__builtin_setjmp'
a-raise.o: In function `__gnat_raise_nodefer_with_msg':
a-raise.o(.text+0xc4): undefined reference to `__builtin_longjmp'      

Now, I have done an nm search in all directories of the distribution,
but, as you may already have guessed, I didn't find what I was looking
for.
The system I am working on is RedHat-5.0, with glibc-2.0.7, gcc-2.7.2.1
from the gnat-3.10p-binary distribution, and I modified the ada
source files 5iosinte.ads/5losinte.ads with the following diff
<    type sigset_t is new unsigned_long;
---
>    type sigset_t is array (1 .. 32) of unsigned_long;
>    pragma Pack (sigset_t);    
as well as a-init.c with
39a40,41
> #define NULL 0
>                    

Any ideas ? 

-------------------------------------------------------------------------
Andreas Jungmaier  		ajung@teisa.unican.es
-------------------------------------------------------------------------

Re: gnat compilation fails with missing symbols

[Robert Dewar]

<<is run, followed by a long list of object files, that pops up:
a-misc.o: In function `yyparse':
a-misc.o(.text+0x16): undefined reference to `__builtin_setjmp'
a-raise.o: In function `__gnat_raise_nodefer_with_msg':
a-raise.o(.text+0xc4): undefined reference to `__builtin_longjmp'
>>

You are using the wrong C compiler. Read the directions carefully and
follow them exactly!

Re: gnat compilation fails with missing symbols

[Robert Dewar]

<<a-misc.o: In function `yyparse':
a-misc.o(.text+0x16): undefined reference to `__builtin_setjmp'
a-raise.o: In function `__gnat_raise_nodefer_with_msg':
a-raise.o(.text+0xc4): undefined reference to `__builtin_longjmp'
>>

This is typical of using the wrong C compiler. It is important to follow
the instructions carefully and exactly.

Re: gnat compilation fails with missing symbols

[Ronald Cole]

dewar@merv.cs.nyu.edu (Robert Dewar) writes:
> <<is run, followed by a long list of object files, that pops up:
> a-misc.o: In function `yyparse':
> a-misc.o(.text+0x16): undefined reference to `__builtin_setjmp'
> a-raise.o: In function `__gnat_raise_nodefer_with_msg':
> a-raise.o(.text+0xc4): undefined reference to `__builtin_longjmp'
> >>
> 
> You are using the wrong C compiler. Read the directions carefully and
> follow them exactly!

What Robert means is that there are patches in the GNAT source tree to
be applied to gcc-2.7.2.x so that it will support GNAT.  If you are
using a gcc built without those patches, then "you are using the wrong
C compiler".

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