How can I test if the GNU or Sun linker is used?

[Dr. David Kirkby]

When building gcc on Solaris, its possible to built it 4 ways.

* Use the Sun linker and Sun assembler
* Use the Sun linker and GNU assembler
* Use the GNU assembler and Sun linker
* Use the GNU linker and GNU assembler.

I'd like to be able to test whether gcc uses the Sun or GNU linker, and 
Sun or GNU assembler (the linker being the more important of the two to 
me).

This gcc on Solaris (SPARC) for example is build with both the Sun 
linker and assembler.

../gcc-4.2.4/configure --prefix=/usr/local/gcc-4.2.4-sun-linker/ 
--with-as=/usr/ccs/bin/as --without-gnu-as --with-ld=/usr/ccs/bin/ld 
--without-gnu-ld --enable-languages=c,c++,fortran 
--with-mpfr-include=/usr/local/include --with-mpfr-lib=/usr/local/lib 
--with-gmp-include=/usr/local/include --with-gmp-lib=/usr/local/lib
Thread model: posix
gcc version 4.2.4

This version of gcc on an OpenSolaris machine uses the GNU assembler, 
but the Sun linker.

gcc -v
Reading specs from /usr/sfw/lib/gcc/i386-pc-solaris2.11/3.4.3/specs
Configured with: /builds2/sfwnv-gate/usr/src/cmd/gcc/gcc-3.4.3/configure 
--prefix=/usr/sfw --with-as=/usr/sfw/bin/gas --with-gnu-as 
--with-ld=/usr/ccs/bin/ld --without-gnu-ld 
--enable-languages=c,c++,f77,objc --enable-shared
Thread model: posix
gcc version 3.4.3 (csl-sol210-3_4-20050802)



Parsing the output of gcc -v is not an option, as its not necessary for 
these to be specified - one could leave them, and let the gcc configure 
script chose one.