[Info-vax] VAX Macro to C conversion

[Arne Vajhøj]

On 6/25/2019 12:09 PM, John Reagan wrote:
> On Tuesday, June 25, 2019 at 10:32:13 AM UTC-4, Bill Gunshannon wrote:
>> Do any of the VMS C Compilers have the equivalent of -S in most
>> Unix C Compilers?  I would love to see a few simple programs
>> (starting with "Hello World") written in Macro, converted to C
>> and then compiled with the option to list the assembler just to
>> see how they compared.  :-)

> Not currently.  LLVM provides that feature and our current internal
> cross-compilers have a /SWITCH=ASSEMBLY qualifier that causes a ".s"
> file to be written instead of an ".obj" file.  In theory, you should
> be able to turn around and assemble that file (using the LLVM llvm-mc
> tool) to get the identical ".obj" file.  I did that a few times in
> the past month or so and it seemed to work.
> However, on OpenVMS, ANALYZE/OBJECT/DISASSEMBLE is the equivalent of
> what objdump would give you on a Linux system.  (There is also an
> llvm-objdump equivalent tool that we'll provide too).  That just
> gives you the code but is lacking for static data initialization,
> etc.  You have to get that from the Alpha or Itanium compiler
> listings.
$ PAS/LIST/MACH ...

should reveal some things. Just not directly compilable.

Arne