Re: testcase for "absolute source" patch

[Michael Chastain <mec.gnu@mindspring.com>]

Hi Baurzhan,

bi> 1. Just for my knowledge: I've found the "int main" requirement in C99
bi>    5.1.2.2.1. But I couldn't find anything about function definitions
bi>    without a return type defaulting to int (i.e., should the compiler
bi>    treat the return type as int if it isn't specified?). Does C99 and
bi>    previous standards say anything about that? Is it different for
bi>    declarations and definitions?

I don't have copies of the standards documents, so I'm working from
The C++ Programming Language 2nd Edition, Kernighan and Ritchie.
To my surprise, I found out that in this book, and presumably in
the C89 standard, a function with no return type defaults to "int".
From section 1.9:

  "This line also declares that getline returns an int;
   since int is the default return type, it could be omitted."

I don't think it's different for declarations and definitions.

In a normal program, the FSF coding standards would apply.  But a test
suite is contra-variant.  Anything that is legal C89 and that doesn't
make gcc give a warning is okay in a test program, and variation is good
because it exercises different parts of gdb.

So it's okay to leave your "main" with no return type.
But take out the "-w" from gdb_compile.

bi> 2. As far as I could see, remote_exec host starts a new shell each time.
bi>    How should one do the following right?
bi>
bi>    remote_exec host cd ...
bi>    remote_exec host gdb_compile ...
bi>    remote_exec host cd ...
bi>
bi>    I'm reluctant to write scripts since I have to do the same with
bi>    gdb_test, too.

I don't know.

Dejagnu's desire to manage the filenames on the host machine conflicts
with your desire for explicit control of the filenames.

Normally you would call gdb_compile (not remote_exec host gdb_compile).
gdb_compile calls target_compile, which calls default_target_compile,
which calls remote_exec, which calls call_remote.  You would need a
hook inside call_remote to send several commands to the same shell.
Ick!

Alternatively, you would need to forsake gdb_compile and do everything
at the "remote_exec host cd ... && gcc ... && cd ...", basically
duplicating the machinery inside default_target_compile to process
the options (but you know what your own options are) and to find the
name of the c compiler.

I have another issue which demands that I clean up the machinery
that locates compilers.  The issue is how to run the test suite
with non-fsf compilers, especially for fortran.

Let me think about this, and I will get back to tonight or tomorrow,
also with detailed feedback on your version #2.

Michael