[PATCH V2 1/2] testsuite: Support detection of Intel compilers via test_compiler_version.

[Yao Qi]

Bernhard Heckel <bernhard.heckel@intel.com> writes:

> Add Intel specific preprocessor macros to query the version of the compiler.
>

Looks you query the version of c/c++ compiler, and use it for fortran.
Can we assume that fortran compiler's version is the same as the c/c++
compiler version?  In an extreme case, user can set c compiler to icc,
and set fortran compiler to gfortran.

Looks we've already had such assumption in ada, that is, we determine
ada compiler version by the c compiler, so I am OK to do the same for
fortran.

> --- a/gdb/testsuite/lib/compiler.cc
> +++ b/gdb/testsuite/lib/compiler.cc
> @@ -44,3 +44,15 @@ set compiler_info [join {armcc __ARMCC_VERSION} -]
>  #if defined (__clang__)
>  set compiler_info [join {clang __clang_major__ __clang_minor__ __clang_patchlevel__} -]
>  #endif
> +
> +#if defined (__ICC)
> +set icc_major [string range __ICC 0 1]
> +set icc_minor [format "%d" [string range __ICC 2 [expr {[string length __ICC] -1}]]]
> +set icc_update __INTEL_COMPILER_UPDATE
> +set compiler_info [join "icc $icc_major $icc_minor $icc_update" -]
> +#elif defined (__ICL)
> +set icc_major [string range __ICL 0 1]
> +set icc_minor [format "%d" [string range __ICL 2 [expr {[string length __ICL] -1}]]]
> +set icc_update __INTEL_COMPILER_UPDATE
> +set compiler_info [join "icc $icc_major $icc_minor $icc_update" -]
> +#endif

Do we really need the change to compiler.cc?  Since we query the info of
compilers for different languages through c compiler, we don't need the
change compiler.cc unless we need to know the compiler info in some c++
tests.

> diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
> index 1ef6a96..75c5e68 100644
> --- a/gdb/testsuite/lib/gdb.exp
> +++ b/gdb/testsuite/lib/gdb.exp
> @@ -3553,6 +3553,9 @@ proc gdb_compile_shlib {sources dest options} {
>                  lappend obj_options "additional_flags=-fpic"
>              }
>          }
> +        "icc-*" {
> +                lappend obj_options "additional_flags=-fpic"
> +        }

Why do we need this change?  How is it related to this patch series?

-- 
Yao (齐尧)