If you have multiple PHP versions installed, you may be able to specify for which installation you'd like to build by using the --with-php-config option during configuration.
--with-php-config=[Insert path to proper php-config here]
For example (my case):
./configure --with-php-config=/usr/local/php5/bin/php-config5
Compilando extensões compartilhadas PECL com phpize
Algumas vezes, usar o instalador pecl não é uma opção. Isso pode acontecer se você estiver atrás de um firewall, ou porque a extensão que você quer instalar não está disponível como um pacote compatível com PECL, por exemplo, extensões ainda sem release no CVS. Se você precisar compilar tal extensão, você pode usar as ferramentas de compilação de baixo nível para realizar a compilação manualmente.
O comando phpize é usado para preparar o ambiente de compilação para uma extensão do PHP. No exemplo seguinte, os fontes para uma extensão estão em um diretório com nome extname:
$ cd extname $ phpize $ ./configure $ make # make install
Uma instalação bem sucedida criará um arquivo extname.so e o colocará no diretório de extensões do PHP. Você precisará ajustar o arquivo php.ini e acidionar uma linha extension=extname.so antes de usar a extensão.
Se o sistema não tiver o comando phpize, e pacotes pré-compilados são usados (como RPM's), certifique-se de instalar a versão devel apropriada do pacote do PHP, uma vez que eles freqüentemente contém o comando phpize assim como os arquivos de cabeçalho para compilar o PHP e suas extensões.
Execute phpize --help para mostra informações de uso adicionais.
When compiling an extension for a stack which is 64 bits (for example) and your compiler is configured to compile in 32 bits, you can manually compile your extensions using C flags before your configure.
Example: my system compiler is 32 bits and my stack is 64 bits. To compile my xdebug:
# phpize
# CFLAGS=-m64 CPPFLAGS=-m64 CCASFLAGS=-m64 ./configure --enable-xdebug
# gmake
# file modules/xdebug.so
modules/xdebug.so: ELF 64-bit LSB dynamic lib AMD64 Version 1, dynamically linked, not stripped, no debugging information available
When you have multiple installations of PHP, running phpize from a specific installation will not force the module to be compiled with that installation's include files.
In my case, I had a standard PHP distribution installed, and am evaluating Zend Core / Zend Platform, which installed it's own Apache & PHP in a /usr/local/Zend/.. install path. It was missing the json.so module, so I had to compile my own.
Running Zend Core's phpize, the output indicates that configuration for that module will occur. But when running ./configure, the standard installation's include files are used. The result json.so being compiled against the wrong PHP would not load when Zend Core's php initializes.
The only way I could see to correct the situation was to temporarily change the standard PHP include path to point to the Zend Core's include files. In my case, I made a backup copy of /usr/include/php5 and did a "ln -s /usr/local/Zend/Core/include/php/ /usr/include/php5".
In some situations (e.g. on a cPanel server), the built extension will not be placed into the correct extensions directory by the make install process. Use your phpinfo() output to determine what the correct extension_dir path is and move the generated .so file into that directory. The extension=extname.so line in php.ini will then find the extension file correctly.
Minimizing harm on upgrading extensions on busy server.
I upgraded (phpize,make... way) APC-extension on quite busy server and found out that Apache segfaults if i just restart it gracefully with the new extension in place. I found a way around this, so that the users of the server only see small slow down of the services.
1. Comment out extension loading (old extension) in php.ini (or separate .ini-file).
2. Restart Apache gracefully (now system runs without extension).
3. Replace old extension with new version (can be done already before first restart) and edit .ini again to include extension.
4. Restart Apache gracefully again (new extension loads).
Of course this only works for extensions which your php-application can live without for a short period of time. ;-)
