DBD::Pgのインストール「Path to pg_config?」を解決する

• 簡単簡単と思っていたらいきなりエラー

$ cpanm DBD::Pg
--> Working on DBD::Pg
Fetching http://search.cpan.org/CPAN/authors/id/T/TU/TURNSTEP/DBD-Pg-2.18.1.tar.gz ... OK
Configuring DBD-Pg-2.18.1 ... N/A
! Configure failed for DBD-Pg-2.18.1. See /home/ymko/.cpanm/build.log for details.

--- build.log ---
--> Working on DBD::Pg
Fetching http://search.cpan.org/CPAN/authors/id/T/TU/TURNSTEP/DBD-Pg-2.18.1.tar.gz
-> OK
Unpacking DBD-Pg-2.18.1.tar.gz
Entering DBD-Pg-2.18.1
Checking configure dependencies from META.yml
Checking if you have version 0 ... Yes (0.94)
Checking if you have DBI 1.52 ... Yes (1.617)
Configuring DBD-Pg-2.18.1
Running Makefile.PL
Configuring DBD::Pg 2.18.1
Path to pg_config?
Use of uninitialized value in concatenation (.) or string at Makefile.PL line 99.
Use of uninitialized value in concatenation (.) or string at Makefile.PL line 101.
PostgreSQL version: 0 (default port: 0)
POSTGRES_HOME: (not set)
POSTGRES_INCLUDE: /include
POSTGRES_LIB: /lib
OS: linux
The value of POSTGRES_INCLUDE points to a non-existent directory: /include
Cannot build unless the directories exist, exiting.

どうやら pg_config というファイルが見つからない？とからしい。

実行ファイルなどの配置場所が変更されたため、従来は必要なかったPATH指定が必要になるケースがあります。下記のalternativesと関連しますが、特にinitdbやpg_ctlが"/usr/bin"配下にあることを期待している環境では、"/usr/pgsql-m.n/bin"などへのPATHをbashrcなどへ記述すると良いでしょう。

http://lets.postgresql.jp/documents/tutorial/new_rpm

• なるほど。今度はうまくいか・・・ない

$ echo "PATH=$PATH:/usr/pgsql-9.1/bin" >> ~/.bashrc
$ source ~/.bashrc
$ cpanm DBD::Pg
--> Working on DBD::Pg
Fetching http://search.cpan.org/CPAN/authors/id/T/TU/TURNSTEP/DBD-Pg-2.18.1.tar.gz ... OK
Configuring DBD-Pg-2.18.1 ... OK
Building and testing DBD-Pg-2.18.1 ... FAIL
! Installing DBD::Pg failed. See /home/ymko/.cpanm/build.log for details.

--- build.log ---
Pg.h:38:22: error: libpq-fe.h: No such file or directory

• develが必要らしい.今度こそOK

# wget http://yum.pgrpms.org/9.1/redhat/rhel-5-x86_64/postgresql91-devel-9.1.2-1PGDG.rhel5.x86_64.rpm
# rpm -ivh postgresql91-devel-9.1.2-1PGDG.rhel5.x86_64.rpm

$ cpanm DBD::Pg
--> Working on DBD::Pg
Fetching http://search.cpan.org/CPAN/authors/id/T/TU/TURNSTEP/DBD-Pg-2.18.1.tar.gz ... OK
Configuring DBD-Pg-2.18.1 ... OK
Building and testing DBD-Pg-2.18.1 ... OK
Successfully installed DBD-Pg-2.18.1
1 distribution installed