dnl

dnl RMySQL

dnl

dnl $Id$

dnl

dnl Generate a "configure" script that will install the RMySQL package.

dnl

dnl NOTE: The resulting configure script implements the following logic:

dnl

dnl 1. If PKG_CPPFLAGS and PKG_LIBS are defined, use them (as suggested in

dnl Section 1.2.1 in the "Writing R Extensions, 1.3.0). Ditto for

dnl MYSQL_DIR, MYSQL_INC, MYSQL_LIB.

dnl

dnl 2. We check for mysql.h and -lmysqlclient in system directories, and if

dnl found, we use these (provide the user does not explicitly request

dnl another version, see below). Notice that the MySQL source distribution

dnl installs by default to /usr/local/lib/mysql and /usr/local/include/mysql

dnl

dnl 3. Alternatively, if the user specifies explicitly a particular MySQL

dnl installation we use that version. This can be requested through

dnl --with-mysql-dir=DIR

dnl --with-mysql-inc=<include-DIR>

dnl or --with-mysql-lib=<library-DIR>

dnl

dnl (these are equivent to setting and exporting MYSQL_{DIR,INC,LIB})

dnl In the first case, DIR is assumed to include the lib and include

dnl subdirectories; individual locations of these two may be

dnl specified independently through <include-inc> and <library-dir>,

dnl respectively. If we found these, we exit.

dnl

dnl 4. We check for the GNU implementation of getopt_long and set the

dnl C preprocessor macro HAVE_GETOPT_LONG accordingly. On windows

dnl (including MinGW) should be false.

dnl

dnl Global variables: The following variables may be set and exported

dnl prior to running configure:

dnl PKG_CPPFLAGS, PKG_LIBS, MYSQL_DIR, MYSQL_INC, MYSQL_LIB

dnl

AC_INIT(src/RS-MySQL.c)

AC_PROG_CPP

# Some people have reported not having libz (which we clearly is needed

# in the INSTALL file). Oh well.

#

AC_CHECK_LIB(z, compress,

HAVE_COMPRESS="yes",

HAVE_COMPRESS="no")

# Do we have access to GNU's getopt_long (problem on some systems, e.g.,

# FreeBDS, Mac OS/X, Windows/MinGW)

#

AC_CHECK_LIB(c, getopt_long,

HAVE_GETOPT_LONG="yes",

HAVE_GETOPT_LONG="no")

# can we find MySQL in the system directories? (users may still want/need

# to use another version/installation)

#

AC_CHECK_LIB(mysqlclient, mysql_init,

HAVE_MYSQL_LIB="yes",

HAVE_MYSQL_LIB="")

AC_CHECK_HEADERS(mysql.h,

HAVE_MYSQL_INC="yes",

HAVE_MYSQL_INC="")

#

# the user may still want a particular MySQL installation/version (possibly

# overriding system directories). Note that we don't clobber the shell

# variables MYSQL_DIR, MSYQL_INC, MYSQL_LIB, that may be inherited from the

# global shell environement.

#

AC_ARG_WITH(mysql-dir,

[--with-mysql-dir=MYSQL_DIR specifies an existing MySQL base dir],

MYSQL_DIR="${with_mysql_dir}")

AC_ARG_WITH(mysql-inc,

[--with-mysql-inc=MYSQL_INC specifies an existing MySQL include dir],

MYSQL_INC="${with_mysql_inc}")

AC_ARG_WITH(mysql-lib,

[--with-mysql-lib=MYSQL_LIB specifies an existing MySQL lib dir],

MYSQL_LIB="${with_mysql_lib}")

# handle the uniformative cases of --with-mysql w.o. argument

# and the case of -with-no-mysql

test "${MYSQL_DIR}" = "yes" -o "${MYSQL_DIR}" = "no" && MYSQL_DIR=""

test "${MYSQL_LIB}" = "yes" -o "${MYSQL_LIB}" = "no" && MYSQL_LIB=""

test "${MYSQL_INC}" = "yes" -o "${MYSQL_INC}" = "no" && MYSQL_INC=""

if test -n "${MYSQL_DIR}" ; then

test ! -d "${MYSQL_DIR}" && AC_MSG_ERROR([dir ${MYSQL_DIR} does not exist])

test -z "${MYSQL_INC}" -a -d "${MYSQL_DIR}/include/mysql" && \

MYSQL_INC="${MYSQL_DIR}/include/mysql"

test -z "${MYSQL_LIB}" -a -d "${MYSQL_DIR}/lib/mysql" && \

MYSQL_LIB="${MYSQL_DIR}/lib/mysql"

fi

#

# We now determine whether we found the lib and header files (we still

# need to check PKG_*, in case the user only defined one them)

#

if test -z "${PKG_LIBS}" ; then

if test -n "${MYSQL_LIB}" ; then

# use the one specified in --with-mysql-*

PKG_LIBS="-L${MYSQL_LIB} -lmysqlclient"

else

# use the one in the system dirs (if there's one)

test -n "${HAVE_MYSQL_LIB}" && PKG_LIBS="-lmysqlclient"

fi

fi

if test -z "${PKG_CPPFLAGS}" ; then

if test -n "${MYSQL_INC}" ; then

# use the one specified in --with-mysql-inc=DIR

PKG_CPPFLAGS="-I${MYSQL_INC}"

FOUND_INC="yes"

else

if test -n "${HAVE_MYSQL_INC}" ; then

# use the one in the system dirs

PKG_CPPFLAGS=""

FOUND_INC="yes"

else

PKG_CPPFLAGS=""

FOUND_INC="no"

fi

fi

fi

if test "${HAVE_GETOPT_LONG}" = "no" ; then

PKG_CPPFLAGS="${PKG_CPPFLAGS} -DHAVE_GETOPT_LONG=0 "

fi

# if above fails, do a more exhaustive search into potential mysql

# subdirectories of the system directories.

if test -z "${HAVE_MYSQL_LIB}" -a -z "${PKG_LIBS}" ; then

for dir in /usr/local/lib64 /usr/lib64 \

/usr/local/lib /usr/lib /usr/local/mysql/lib /opt/lib /lib

do # need to release mysqlcient from cache

unset ac_cv_lib_mysqlclient_mysql_init

candidate="${dir}/mysql"

AC_CHECK_LIB(mysqlclient, mysql_init,

HAVE_MYSQL_LIB="${candidate}",

HAVE_MYSQL_LIB="",

[-L${candidate}])

if test -n "${HAVE_MYSQL_LIB}" ; then

echo " mysqlclient found in -L${HAVE_MYSQL_LIB}"

PKG_LIBS="-L${HAVE_MYSQL_LIB} -lmysqlclient"

break

fi

done

fi

# ditto for the header files

if test -z "${HAVE_MYSQL_INC}" -a -z "${PKG_CPPFLAGS}" ; then

for dir in /usr/local/include /usr/include /usr/local/mysql/include \

/opt/include /include

do

candidate="${dir}/mysql"

AC_CHECK_HEADER(${candidate}/mysql.h,

HAVE_MYSQL_INC="${candidate}",

HAVE_MYSQL_INC="")

if test -n "${HAVE_MYSQL_INC}" ; then

PKG_CPPFLAGS="-I${HAVE_MYSQL_INC}"

FOUND_INC="yes"

break

fi

done

fi

# don't go any further if don't have libz

if test "${HAVE_COMPRESS}" = "no" ; then

echo ""

echo "Configuration error:"

echo ' Could not locate the library "libz" required by MySQL.'

echo ""

echo "INSTRUCTIONS:"

echo ""

echo ' The "libz" library is required by the MySQL client library'

echo " in order to compress/uncompress connections between clients"

echo " and the MySQL engine."

echo ""

echo ' Make sure you have "libz" installed properly and/or included'

echo ' in your $LD_LIBRARY_PATH. Perhaps it is not in any of the'

echo " standard directories (e.g., /usr/lib/, /usr/local/lib)?"

echo ""

echo "Aborting the installation of RMySQL."

echo ""

exit 1

fi

# If we stil haven't set PKG_*, error

if test "${FOUND_INC}" = "no" -o -z "${PKG_LIBS}" ; then

echo ""

echo "Configuration error:"

echo " could not find the MySQL installation include and/or library"

echo " directories. Manually specify the location of the MySQL"

echo " libraries and the header files and re-run R CMD INSTALL."

echo ""

echo "INSTRUCTIONS:"

echo ""

echo "1. Define and export the 2 shell variables PKG_CPPFLAGS and"

echo " PKG_LIBS to include the directory for header files (*.h)"

echo " and libraries, for example (using Bourne shell syntax):"

echo ""

echo ' export PKG_CPPFLAGS="-I<MySQL-include-dir>"'

echo ' export PKG_LIBS="-L<MySQL-lib-dir> -lmysqlclient"'

echo ""

echo " Re-run the R INSTALL command:"

echo ""

echo " R CMD INSTALL RMySQL_<version>.tar.gz"

echo ""

echo "2. Alternatively, you may pass the configure arguments"

echo " --with-mysql-dir=<base-dir> (distribution directory)"

echo " or"

echo " --with-mysql-inc=<base-inc> (where MySQL header files reside)"

echo " --with-mysql-lib=<base-lib> (where MySQL libraries reside)"

echo " in the call to R INSTALL --configure-args='...' "

echo ""

echo " R CMD INSTALL --configure-args='--with-mysql-dir=DIR' RMySQL_<version>.tar.gz"

echo ""

exit 1

fi

AC_SUBST(PKG_CPPFLAGS)

AC_SUBST(PKG_LIBS)

AC_OUTPUT(src/Makevars)