package/php: switch from libmysqlclient to mysqlnd

The Mysql Native Driver has been the default mysql driver since
PHP 5.4, but buildroot was still using libmysqlclient.

Mysqlnd has several advantages such as improved memory management
and the more favorable PHP licensing terms.
(can combine it with proprietary PHP extensions like Ioncube
loader, while libmysqlclient requires commercial licensing if you
link to it and do not fall under their GPL/FOSS license exception)

Signed-off-by: Floris Bos <bos@je-eigen-domein.nl>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/php/Config.ext

@@ -113,10 +113,6 @@ endif
 
 config BR2_PACKAGE_PHP_EXT_MYSQLI
 	bool "Mysqli"
-	depends on BR2_INSTALL_LIBSTDCPP
-	depends on BR2_USE_MMU # mysql
-	depends on BR2_TOOLCHAIN_HAS_THREADS # mysql
-	select BR2_PACKAGE_MYSQL
 	help
 	  MySQL Improved extension support
 
@@ -135,17 +131,9 @@ if BR2_PACKAGE_PHP_EXT_PDO
 
 config BR2_PACKAGE_PHP_EXT_PDO_MYSQL
 	bool "MySQL"
-	depends on BR2_INSTALL_LIBSTDCPP
-	depends on BR2_USE_MMU # mysql
-	depends on BR2_TOOLCHAIN_HAS_THREADS # mysql
-	select BR2_PACKAGE_MYSQL
 	help
 	  PDO driver for MySQL
 
-comment "MySQL drivers need a toolchain w/ C++, threads"
-	depends on BR2_USE_MMU
-	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS
-
 config BR2_PACKAGE_PHP_EXT_PDO_POSTGRESQL
 	bool "PostgreSQL"
 	select BR2_PACKAGE_POSTGRESQL

package/php/php.mk

@@ -181,8 +181,7 @@ endif
 
 ### Native SQL extensions
 ifeq ($(BR2_PACKAGE_PHP_EXT_MYSQLI),y)
-PHP_CONF_OPTS += --with-mysqli=$(STAGING_DIR)/usr/bin/mysql_config
-PHP_DEPENDENCIES += mysql
+PHP_CONF_OPTS += --with-mysqli
 endif
 ifeq ($(BR2_PACKAGE_PHP_EXT_SQLITE),y)
 PHP_CONF_OPTS += --with-sqlite3=$(STAGING_DIR)/usr
@@ -199,8 +198,7 @@ PHP_DEPENDENCIES += sqlite
 PHP_CFLAGS += -DSQLITE_OMIT_LOAD_EXTENSION
 endif
 ifeq ($(BR2_PACKAGE_PHP_EXT_PDO_MYSQL),y)
-PHP_CONF_OPTS += --with-pdo-mysql=$(STAGING_DIR)/usr
-PHP_DEPENDENCIES += mysql
+PHP_CONF_OPTS += --with-pdo-mysql
 endif
 ifeq ($(BR2_PACKAGE_PHP_EXT_PDO_POSTGRESQL),y)
 PHP_CONF_OPTS += --with-pdo-pgsql=$(STAGING_DIR)/usr