Hi,
If using AC_PROG_CC and the compiler is the gcc, the variable GCC is set to "yes".
Likewise, if using AC_PROG_F77 and the Fortran 77 compiler is g77, then the
variable G77 is set to "yes".
If however I call AC_PROG_FC, is there any simple way of knowing if that
compiler is a GNU compiler? The configure script shows:
checking whether we are using the GNU Fortran compiler... (cached) no
checking whether /opt/sunstudio12.1/bin/f95 accepts -g... (cached) no
checking for Fortran flag needed to allow free-form source... -free
Is there anything I can test, that will indicate this is not a GNU compiler? It
so happens it is the Sun compiler, but I don't care about that - I just want to
know whether it is a GNU compiler.
What I am trying to do is test the C, C++ and Fortran compilers, to ensure they
are either
1) All GNU compilers OR
2) All non-GNU compilers
What I want is to avoid a mixture of the two. I would imagine trying to mix
object files from the Sun Fortran compiler and the GNU C++ compiler is likely to
end in tears.
Dave
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