Pre-processor sub-process

Pre-processor sub-process

[Matthieu Dubuget]

Hello,

I'm trying to have bin-prot compiled with mingw version of OCaml with
the original OCamlMakefile.

This fails on my computer.

I reproduced the problem here:

On linux, there is no problem:
$ uname
Linux
$ echo $BIN_PROT_CPP
cpp
$ echo $pp
$BIN_PROT_CPP $ARCH_FLAGS
$ ocamlc -c -verbose -pp "echo $pp && $pp" write_ml.ml
+ echo $BIN_PROT_CPP $ARCH_FLAGS && $BIN_PROT_CPP $ARCH_FLAGS
'write_ml.ml' > /tmp/camlppf6e35a
cpp
File "write_ml.ml", line 33, characters 0-11:
Error: Unbound module Common

Ok. If I cat /tmp/camlppf6e35a, I can check that write_ml.ml was
actually pre-processed by cpp.

On cygwin:
$ uname
CYGWIN_NT-5.1
$ echo $BIN_PROT_CPP
cpp
$ echo $pp
$BIN_PROT_CPP $ARCH_FLAGS
$ ocamlc -c -verbose -pp "echo $pp && $pp" write_ml.ml
+ echo $BIN_PROT_CPP $ARCH_FLAGS && $BIN_PROT_CPP $ARCH_FLAGS
"write_ml.ml" > c:\DOCUME~1\matt\LOCALS~1\Temp\camlpp8a6978
$BIN_PROT_CPP $ARCH_FLAGS
'$BIN_PROT_CPP' n'est pas reconnu en tant que commande interne
ou externe, un programme excutable ou un fichier de commandes.
File "write_ml.ml", line 1, characters 0-1:
Error: Preprocessor error

It seems that when the pre-processor is called, the environment is not
given to the sub-process?

Can anybody reproduce this problem (or better: provide a solution), or
did I something bad?

P.S. Both tests are with a Godi installed 3.11.1 ocaml.

Thanks

Matt

Re: [Caml-list] Pre-processor sub-process

[Olivier Andrieu]

Hi,

On Sun, Sep 27, 2009 at 22:58, Matthieu Dubuget
<matthieu.dubuget@gmail.com> wrote:
> Hello,
>
> I'm trying to have bin-prot compiled with mingw version of OCaml with
> the original OCamlMakefile.
>
> This fails on my computer.
>
> I reproduced the problem here:
>
> On linux, there is no problem:
>
> On cygwin:
> $ uname
> CYGWIN_NT-5.1
> $ echo $BIN_PROT_CPP
> cpp
> $ echo $pp
> $BIN_PROT_CPP $ARCH_FLAGS
> $ ocamlc -c -verbose -pp "echo $pp && $pp" write_ml.ml
> + echo $BIN_PROT_CPP $ARCH_FLAGS && $BIN_PROT_CPP $ARCH_FLAGS
> "write_ml.ml" > c:\DOCUME~1\matt\LOCALS~1\Temp\camlpp8a6978
> $BIN_PROT_CPP $ARCH_FLAGS
> '$BIN_PROT_CPP' n'est pas reconnu en tant que commande interne
> ou externe, un programme excutable ou un fichier de commandes.
> File "write_ml.ml", line 1, characters 0-1:
> Error: Preprocessor error
>
> It seems that when the pre-processor is called, the environment is not
> given to the sub-process?
>
> Can anybody reproduce this problem (or better: provide a solution), or
> did I something bad?

what ocaml-win32 port are you using exactly ? This looks like the
mingw (or MSVC) port because the error message you get looks like one
from CMD.EXE, the Windows shell. The cygwin port uses cygwin's sh
whereas the mingw/msvc port use cmd.exe.

You'll have to use cmd.exe's syntax for environment variable
expansion: %BIN_PROT_CPP% I believe.

HTH,
-- 
  Olivier