php4インストール時
In file included from pgsql.c:29:
php_pgsql.h:32: postgres.h: No such file or directory
make[3]: *** [pgsql.lo] Error 1
make[3]: Leaving directory `/usr/local/src/php-4.0.4pl1/ext/pgsql'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/usr/local/src/php-4.0.4pl1/ext/pgsql'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/usr/local/src/php-4.0.4pl1/ext'
make: *** [all-recursive] Error 1
こんなエラーがでるんだけど・・どうやって解消するの？