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Building C++ extensions

php.internals

Stut

19 years ago

Ok, so I've built an extension that uses a C++ library. It compiles fine
but the build system is insisting on linking with gcc no matter what I
tell it. Is there some simple trick I'm missing as far as convincing it
to use g++ goes?

Here is the config.m4 in case I've missed something in there...

PHP_ARG_ENABLE(mmsr, whether to enable mmsr support,
[  --enable-mmsr=dir       Enable mmsr support])

if test "$PHP_MMSR" != "no"; then
PHP_ADD_LIBRARY_WITH_PATH(mmsr, "$PHP_MMSR")
PHP_ADD_INCLUDE("$PHP_MMSR/MMSR")
PHP_NEW_EXTENSION(mmsr, mmsr.c "$PHP_MMSR/MMSR/mmsr_bridge.cpp",
$ext_shared)
PHP_REQUIRE_CXX()
fi

I had expected the PHP_REQUIRE_CXX() macro to trigger a change to the
link command, but it does not seem to have done anything beyond
influencing what is used to compile the extension itself.

-Stut

Antony Dovgal

19 years ago

On 26.09.2006 01:09, Stut wrote:

> Ok, so I've built an extension that uses a C++ library. It compiles fine
> but the build system is insisting on linking with gcc no matter what I
> tell it. Is there some simple trick I'm missing as far as convincing it
> to use g++ goes?
>
> Here is the config.m4 in case I've missed something in there...
>
> PHP_ARG_ENABLE(mmsr, whether to enable mmsr support,
> [  --enable-mmsr=dir       Enable mmsr support])
>
> if test "$PHP_MMSR" != "no"; then
>    PHP_ADD_LIBRARY_WITH_PATH(mmsr, "$PHP_MMSR")
>    PHP_ADD_INCLUDE("$PHP_MMSR/MMSR")
>    PHP_NEW_EXTENSION(mmsr, mmsr.c "$PHP_MMSR/MMSR/mmsr_bridge.cpp",
> $ext_shared)
>    PHP_REQUIRE_CXX()
> fi
>
> I had expected the PHP_REQUIRE_CXX() macro to trigger a change to the
> link command, but it does not seem to have done anything beyond
> influencing what is used to compile the extension itself.

PECL/rar is C++ (or sort of C++) extension, so you can use its config.m4 as an example.
Here it is: http://cvs.php.net/viewvc.cgi/pecl/rar/config.m4?revision=1.6&view=markup

--
Wbr,
Antony Dovgal

Olivier Hill

19 years ago

On 9/25/06, Stut <stuttle@gmail.com> wrote:

>
> I had expected the PHP_REQUIRE_CXX() macro to trigger a change to the
> link command, but it does not seem to have done anything beyond
> influencing what is used to compile the extension itself.

Hi,

I think you have to add stdc++ with PHP_ADD_LIBRARY().

I do have a C++ ext internally here, and it still try to link with gcc
and not g++. Still, it does work.

Sincerely,
Olivier

Sara Golemon

19 years ago

>   PHP_NEW_EXTENSION(mmsr, mmsr.c "$PHP_MMSR/MMSR/mmsr_bridge.cpp",
> $ext_shared)

PHP_NEW_EXTENSION(mmsr, mmsr.c "$PHP_MMSR/MMSR/mmsr_bridge.cpp",
$ext_shared,,,1)

Ref: aclocal.m4 / EEPHP:Chapter 17

-Sara

Stut

19 years ago

Sara Golemon wrote:

>>   PHP_NEW_EXTENSION(mmsr, mmsr.c "$PHP_MMSR/MMSR/mmsr_bridge.cpp",
>> $ext_shared)
>>
>
> PHP_NEW_EXTENSION(mmsr, mmsr.c "$PHP_MMSR/MMSR/mmsr_bridge.cpp",
> $ext_shared,,,1)
>
> Ref: aclocal.m4 / EEPHP:Chapter 17

Thanks to all who replied. I have it working now.

Sara: I have ordered your book, but this couldn't wait until it arrives.

Thanks again.

-Stut