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Installing and configuring database search engine (MeCab and PGMeCab)

MeCab is an open source morphological analysis engine developed through the project " 京都大学情報学研究科－日本電信電話株式会社コミュニケーション科学基礎研究所共同研究ユニットプロジェクト".
Please refer the MeCab web site (http://mecab.sourceforge.net/) for more information about.

Please refer the system requirements for which version of MeCab that Denbun supports.
1. Expanding the package
Expand the file you transferred by FTP. In this example, it assumes that the file exists in "/home/guest" directory.

cd /usr/local/src
tar zxvf /home/guest/mecab-0.96.tar.gz

After the expansion, a directory named "mecab-0.96" is created in "/usr/local/src".
2. Install the package
To configure the package, use configure scripts.
Specify UTF-8 as a character set.
Move to the directory you expand the package and run the configure script.

cd /usr/local/src/mecab-0.96
./configure --with-charset=utf8
.
.
.
config.status: creating config.h
config.status: executing default-1 commands
config.status: executing default commands

Make the package.
User GNU make to make the package.

gmake
.
.
.
gmake[2]: Entering directory '/usr/local/src/mecab-0.96'
gmake[2]: Leaving directory '/usr/local/src/mecab-0.96'
gmake[1]: Leaving directory '/usr/local/src/mecab-0.96'


Now, it is ready to install the package. This step requires the super user (root).

gmake install
.
.
.
/bin/sh ./mkinstalldirs /usr/local/etc
  /usr/bin/install -c -m 644 ./mecabrc /usr/local/etc/mecabrc
gmake[2]: Leaving directory '/usr/local/src/mecab-0.96'
gmake[1]: Leaving directory '/usr/local/src/mecab-0.96'


After the checking the installation, use gmake clean command to cleaning. This command deletes unnecessary files and makes free space.

gmake clean
3. Create a link of the library
Since MeCab library is installed in "/usr/local/lib", create a symbolic link in "/usr/lib".

 

ln -s /usr/local/lib/libmecab.so.1.0.0 /usr/lib/libmecab.so
ln -s /usr/local/lib/libmecab.so.1.0.0 /usr/lib/libmecab.so.1
ls -al /usr/lib/libmecab*
lrwxrwxrwx 1 root root 32 2 14 19:14 /usr/lib/libmecab.so -> /usr/local/lib/libmecab.so.1.0.0
lrwxrwxrwx 1 root root 32 2 14 19:14 /usr/lib/libmecab.so.1 -> /usr/local/lib/libmecab.so.1.0.0
4. Install a dictionary for MeCab

5. Expand the package source
Expand the file you transferred by FTP. In this example, it assumes that the file exists in "/home/guest" directory.

 

cd /usr/local/src
tar zxvf /home/guest/mecab-ipadic-2.7.0-20070801.tar.gz


After the expansion, a directory named "mecab-ipadic-2.7.0-20070801" is created in "/usr/local/src".
6. Installing the package
To configure the package, use configure scripts.
Specify UTF-8 as a character set.
Move to the directory you expand the package and run the configure script.

cd /usr/local/src/mecab-ipadic-2.7.0.20070801
./configure --with-chaset=utf8
.
.
.
checking for mecab-config... /usr/local/bin/mecab-config
configure: creating ./config.status
config.status: creating Makefile



Make the package.
User GNU make to make the package.

gmake
.
.
.
done!
echo To enable dictionary, rewrite /usr/local/etc/mecabrc as \"dicrc = /usr/local/lib/mecab/dic/ipaddic\"
To enable dictionary, rewrite /usr/local/etc/mecabrc as "dicrc = /usr/local/lib/mecab/dic/ipadic"


Now, it is ready to install the package. This step requires the super user (root).

gmake install
.
.
.
 /usr/bin/install -c -m 644 ./pos-id.def /usr/local/lib/mecab/dic/ipadic/pos-id.def
 /usr/bin/install -c -m 644 ./dicrc /usr/local/lib/mecab/dic/ipadic/dicrc
gmake[1]: Leaving directory '/usr/local/src/mecab-ipadic-2.7.0-20070801'


After the checking the installation, use gmake clean command to cleaning. This command deletes unnecessary files and makes free space.

gmake clean
7. Installing pgmecab()
Since Tsearch2 creates indexes by word by word, it does not work on languages such as Japanese that do not delimit words by a space.
For Japanese documents, MeCab delimits Japanese words and index them for Tsearch2.
8. Expanding the package
Expand the file you transferred by FTP. In this example, it assumes that the file exists in "/home/guest" directory.

cd /usr/local/src
tar xvf /home/guest/pgmecab-1.1.tar

After the expansion, a directory named "pgmecab-1.1" is created in "/usr/local/src".

9. Install the package
Before making the package, edit "pgmecab.c" and "Makefile".
First of all, add the following three lines to "/usr/local/src/pgmecab-1.1/pgmecab.c".

/*
 * mecab function for PostgreSQL 8.1.2
 * by byplayer
 * pgmecab.c Ver1.1
 * Copyright (C) byplayer
 */

#include "postgres.h"
#include "fmgr.h"

#ifdef PG_MODULE_MAGIC <--- append
PG_MODULE_MAGIC;
#endif

#include "mecab.h"
.
.
.

Next, edit "/usr/local/src/pgmecab-1.1/Makefile".
Set MECAB_CONFIG_PATH to "/usr/local/bin/mecab-config" and set USE_PGXS parameter.

#-----------------------------------------------------------------------
#
# pgmecab Makefile
#
#-----------------------------------------------------------------------
# MECAB_CONFIG_PATH = /usr/local/mecab/bin/mecab-config
MECAB_CONFIG_PATH = /usr/local/bin/mecab-config <--- modify

SRCS = pgmecab.c

MODULE_big = pgmecab
OBJS = $(SRCS: .c=.o)
DOCS = README.pgmecab
SHLIB_LINK = `$(MECAB_CONFIG_PATH) --libs`
DATA_built = pgmecab.sql


# add mecab include path
PG_CPPFLAGS += `$(MECAB_CONFIG_PATH) --cflags`

# Shared library parameters
override SO_MAJOR_VERSION = 1
override SO_MINOR_VERSION = 1

USE_PGXS = 1 <--- append
ifdef USE_PGXS
PGXS = $(shell pg_config --pgxs)
include $(PGXS)
else
#subdir = contrib/pgmecab
#top_builddir =
include $(top_builddir)/src/Makefile.global
include $(top_srcdir)/contrib/contrib-global.mk
endif

Make the package.
Since it uses the administrative command of PostgreSQL, set the environment variable to the path for the administrative command. This step requires the super user (root).

cd /usr/local/src/pgmecab-1.1
export PATH=$PATH:/usr/local/pgsql/bin

User GNU make to make the package.

gmake
sed 's,MODULE_PATHNAME,$libdir/pgmecab,h' pgmecab.sql.in >pgmecab.sql
gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith -Winline -Wdevlaration-after....
pgmecab.c: In function `pgmecab`:
pgmecab.c:48: Warning: ISO C90 forbids mixed declarations and code
.
.
.
ln -s libpgmecab.so.1.1 libpgmecab.so.1
rm -f libpgmecab.so
ln -s libpgmecab.so.1.1 libpgmecab.so

Now, it is ready to install the package. This step requires the super user (root).

gmake install
/bin/sh /usr/local/src/postgresql-8.2.4/config/install-sh -c -m 644 pgmecab.sql...
/bin/sh /usr/local/src/postgresql-8.2.4/config/install-sh -c -m 644 ./README.pg...
/bin/sh /usr/local/src/postgresql-8.2.4/config/install-sh -c -m 755 libpgmecab. ...

After the checking the installation, use gmake clean command to cleaning. This command deletes unnecessary files and makes free space.

gmake clean

Now, "pgmecab()" installation completed.


　
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