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Re: Understand GCC test process


On 7 October 2015 at 19:43, Sabrina Souto wrote:
> I ran
> make RUNTESTFLAGS='dg.exp=c90-float-1.c -v -v' check-gcc
> And I saw in the log:
> ...
> doing compile
> Invoking the compiler as
> ../gcc-r227092/objdir/gcc/testsuite/g++/../../xg++ -B/...
> ...
>
> The test ../testsuite/gcc.dg/c90-float-1.c contains the action: /* {
> dg-do preprocess } */
> So, why "doing compile" was in the execution log? I thought that the
> compiler would not be called in this case.
> Am I running the test in a wrong way?

I don't know.


>
>>
>> But you're not tracing the compiler anyway. The 'gcc' executable is
>> not the compiler.
>
> I think I understood.
> But, how can I differentiate between the 'gcc' driver's code and the
> compiler's code?
> All the code inside ..gcc-version-x.x/gcc/ corresponds to the 'gcc'
> driver's code?
> Where can I find all the code that implements the compiler and
> preprocessor? In libcpp, libcc1, boehm-gc ?

gcc/c is the C compiler, gcc/cp is the C++ compiler, gcc/objc is the
Obj-C compiler, objcp is the Objective-C++ compiler, gcc/fortran is
the Fortran compiler etc.

This is all documented in the Internals documentation:
https://gcc.gnu.org/onlinedocs/gccint/Subdirectories.html

You should read those docs, a lot of the information is in there.


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