hholzgra / mysql-m4

Autotools macro package for various MySQL related build tasks

mysql-m4

Autotools macro package for various MySQL related build tasks

Introduction

This set of autoconf macros supports

• building against the various MySQL APIs:
  • regular client library API
  • embedded server library API
  • User Defined Function (UDF) API
  • Plugin API
  • NDBAPI
• check for minimum required version
• check for a specifc fork (MySQL, MariaDB, ...)
• building against files from a server source dir

Example

A minimal project using this may look like this:

.
|-- m4
|   `-- ax_compare_version.m4
|   `-- mysql.m4
|-- configure.ac
|-- example.c
`-- Makefile.am

and could be built using

autoreconf -vfi
./configure
make

The mysql.m4 and ax_compare_version.m4 files are copies of the files in this directory, the other files could look like this:

configure.ac:

AC_CONFIG_MACRO_DIR([m4])
AC_INIT([example], [0.0.1])

WITH_MYSQL()
MYSQL_USE_CLIENT_API()
MYSQL_SUBST()

AC_PROG_CC
AC_CONFIG_FILES([Makefile])
AC_OUTPUT

Makefile.m4:

ACLOCAL_AMFLAGS = -I m4
	
AM_CFLAGS = @MYSQL_CFLAGS@ -Wall -Werror -Wno-unused-but-set-variable
AM_LDFLAGS = @MYSQL_LDFLAGS@
AM_LIBS = @MYSQL_LIBS@

bin_PROGRAMS=example
example_SOURCE=example.c

example.c:

#include <stdio.h>
#include <mysql.h>

int main(int argc, char **argv)
{
  printf("MySQL Client Version %lu\n", mysql_get_client_version());

  return EXIT_SUCCESS;
}

Macros

The following variables are set after calling MYSQL_SUBST()

WITH_MYSQL

Adds a --with-mysql=... option that expects either the path to the mysql_config (or mariadb_config) binary or the mysql install prefix. If no path is given it checks for a (mysql|maria)_config binary in the current $PATH

This macro needs to be called before any MYSQL_USE_* and MYSQL_NEED_* macros

WITH_MYSQL_SRC

Adds a --with-mysql-src=... option that expects the path to a mysql server source directory. This option can be used instead or in addition to WITH_MYSQL, but only one of --with-mysql-src or --with-mysql can be used when running configure.

The idea behind this option is that some projects, especially plugins and UDFs, may rely on header (or even source) files that come with the server source but are not part of the installed headers.

This macro needs to be called before any MYSQL_USE_* and MYSQL_NEED_* macros

MYSQL_USE_CLIENT_API

Sets flags necessary to compile and link against the mysql client library (or the mariadb native client library)

MYSQL_USE_EMBEDDED_API

Sets flags necessary to compile and link against the mysql embedded server library

MYSQL_USE_NDB_API

Sets flags necessary to compile and link against the MySQL Cluster NDBAPI

MYSQL_USE_UDF_API

Sets flags necessary to build User Defined Function libraries

MYSQL_USE_PLUGIN_API

Sets flags necessary to build mysql plugins

MYSQL_NEED_VERSION

Check for a specific minimal mysql version.

MYSQL_NEED_VERSION([5.5.0])

MYSQL_NEED_FORK

Check for a specific mysql fork. Currently supported values are mysql and mariadb. Other forks like parcona or webscalesql can't be detected yet.

MYSQL_NEED_FORK([mariadb])

MYSQL_SUBST

This needs to be the very last macro call, it collects results of all previous macros and exports them as variables that can be using in configure.ac and Makefile.am files.

Variables

MYSQL_VERSION

Full version number of the detected mysql version

MYSQL_FORK

Name of the detected mysql fork (only mysql or mariadb for now)

MYSQL_CFLAGS

Compiler flags needed to compile C source files

MYSQL_CXXFLAGS

Compiler flags needed to compile C++ source files

MYSQL_LDFLAGS

Linker flags needed to link against the selected APIs

MYSQL_LIBS

Libraries needed to link

MYSQL_PLUGIN_DIR

Plugin library directory

MYSQL_SRCDIR

Server source directory (when using --with-mysql-src)

mysql-m4's Issues

Problems with mariadb_config

The macro needs updating because there is now a discrepancy between mysql_config and mariadb_config.
As it is, I get these error messages:
/usr/bin/mysql_config: unrecognized option '--variable=pkgincludedir'
grep: /mysql_version.h: No such file or directory

Also MYSQL_NEED_FORK([mariadb]) fails to detect the installed mariadb mistaking it for mysql.