gnat 3.11p problem on redhat 5.2 with egcs?

gnat 3.11p problem on redhat 5.2 with egcs?

[nabbasi]

I had this problem with installation of gnat 3.11p on 
redhat 5.2.

(btw, an RPM package will be great to have, as I find the 
original gnat installation to be confusing as always).

I installed gnat 3.11p, but now I get this error when I 
try to use gcc:

[nasser@1Cust103 mycc]$ gcc t1.cc
gcc: installation problem, cannot exec `cc1plus': No such file or
directory

(but when the file extension is .c, gcc is happy, it is only 
when the file is c++ file that it complains).

I have tried the 1 and second and third options of gnat 
installation:

" There are basically 3 options for installation:

  1) Install GNAT-specific files on top of an existing GCC 2.8.1
     installation (must be in standard locations -- will likely
     require root permission).

  2) Install GCC C compiler and GNAT files in the standard  GCC
locations.
     (Note: This includes directories under /usr.  On most
      systems, this requires root permission).

  3) Install GCC C compiler and GNAT files in non-standard locations
     that you will specify."

Using option 1,2 above, gave the same error when I try to use gcc.
I suspect the problem might be becuase I have installed egcs on my
system sometime ago?


[nasser@1Cust103 mycc]$ rpm -qa | grep egcs
egcs-1.0.3a-14
egcs-c++-1.0.3a-14
egcs-g77-1.0.3a-14
egcs-objc-1.0.3a-14

(using option 3 above generated different problem !)

so, what I did is look for cc1plus file on my system, and found 
one in:

/usr/lib/gcc-lib/i386-redhat-linux/egcs-2.90.29/cc1plus

so, I added the above to the path AFTER /usr/bin, and now it works.
(this seems like a hack to me to have to do this sort of thing).

not sure what is going on here. I have always found this whole 
deal with gcc, g++, gnat using its own gcc, gcc 2.7.2.3, gcc 2.8, 
egcs, etc.. etc.. very confusing mess, sometimes I wonder what
compiler is being used when I do something.
 

Nasser