[Buildroot] BR2_PACKAGE_QT5BASE_MYSQL error

[Peter Seiderer]

Hello Scott,

On Wed, 21 Jul 2021 21:21:47 +0000, Scott Bartolett <SBartolett at thorlabs.com> wrote:

> Hi all,
> 
> I'm getting the following error when I enable the Qt5 MySQL Plugin - BR2_PACKAGE_QT5BASE_MYSQL.
> 
> ERROR: Feature 'sql-mysql' was enabled, but the pre-condition 'libs.mysql' failed.
> make[1]: *** [package/pkg-generic.mk:240: /home/vytran/buildroot-2021.05/output/build/qt5base-5.15.2/.stamp_configured] Error 3
> make: *** [Makefile:84: _all] Error 2
> 
> 
> I have the following:
> 
> BR2_PACKAGE_MYSQL = y
> BR2_PACKAGE_HAS_MYSQL = y
> BR2_PACKAGE_PROVIDES_MYSQL = mariadb
> BR2_PACKAGE_QT5BASE_MYSQL = y
> 
> When I disable BR2_PACKAGE_QT5BASE_MYSQL, it builds ok and MySQL works fine.  But my Qt application cannot find and drivers.  I assume I need the Qt5 MySQL Plugin for that.

From the qt5base configure step:

  Trying source 0 (type mysqlConfig) of library mysql ...
  + .../host/aarch64-buildroot-linux-gnu/sysroot/usr/bin/mysql_config --version
  > .../host/aarch64-buildroot-linux-gnu/sysroot/usr/bin/mysql_config: line 100: \
    .../host/aarch64-buildroot-linux-gnu/sysroot/usr/bin/mariadb_config: cannot execute binary file: Exec format error

And:

	$ file host/aarch64-buildroot-linux-gnu/sysroot/usr/bin/mariadb_config
	host/aarch64-buildroot-linux-gnu/sysroot/usr/bin/mariadb_config: ELF 64-bit LSB pie executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for GNU/Linux 5.10.0, with debug_info, not stripped

Seems the mariadb_config executable (used from the mysql_config script) is
cross-compiled for the target instead compiled nativ for the host...

Your can work-around/fix it by (after qt5base failure, adjust pathes for your need,
e.g. mariabdb-10.3.28, etc):

	$ gcc -I ./build/mariadb-10.3.30/libmariadb/include -o host/aarch64-buildroot-linux-gnu/sysroot/usr/bin/mariadb_config build/mariadb-10.3.30/libmariadb/mariadb_config/mariadb_config.c
	$ rm -rf build/qt5base-5.15.2


And restart the build...

Regards,
Peter

> 
> I'm using Buildroot 2021.05.
> Regards,
> Scott