Can T Find The Postgresql Client Library Libpq Mac
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- Can T Find The Postgresql Client Library Libpq Mac Free
- Can't Find The Postgresql Client Library (libpq)
pgsql.go is a high-level wrapper for the PostgreSQL databaselibpq client library.
Requirements
- Apr 08, 2019 Low-level communication with PostgreSQL server is done via libpq. All concepts in the library are designed to be easily extendable (even replaceable) by the user to simplify adaptation to specific project requirements.
- Can't find the PostgreSQL client library (libpq) I'm trying to install PostgreSQL for Rails on Mac OS X 10.6. First I tried the MacPorts install but that didn't go well so I.
- I installed PostgreSQL on a computer with Mac OS X using the One click installer. Then I try to access PostgreSQL using the psql command, but it doesn't seem to be available. How to run psql on Mac OS X? Ask Question Asked 8 years, 10 months ago. $ brew install postgresql. Then psql (the client command line) will now be available to you.
- Aug 16, 2016 A simple PostgreSQL client library written in Modern C. Libpq m xx is an unofficial C 11 client API for PostgreSQL. The aim of this library is to provide an API very simple to use without any compromise on performances.
The pgsql.go package Makefile assumes that pg_config is in your $PATHto automatically determine the location of the PostgreSQL include directory andthe libpq.so shared library.
No Can't find the PostgreSQL client library (libpq). extconf.rb failed. Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Oookay, so let’s try to find out what’s going wrong. The FireDAC native driver supports PostgreSQL Server version 7.4 and higher, because it requires a PG protocol 3.0 connection. Windows client software FireDAC requires the LIBPQ.DLL x86 or x64 client library for connecting to the PostgreSQL server.
To use the compiled pgsql.go package, the libpq.so library directory should bein your library path (e.g., $LD_LIBRARY_PATH on Linux).
Installation
The package self-test pgsql_test.go assumes that the user running the testcan connect to a running PostgreSQL server on localhost with an existing testdbdatabase. See the PostgreSQL installation documentation(short version)for how to create a test database, or adjust the test connection parametersto suit your setup.
Usage
See the package test file pgsql_test.gofor example usage.
Connection Pools
Two goroutines cannot safely use the same database connection at the same time.However it's often necessary for multiple goroutines to access a databasesimultaneously, such as when creating a goroutine per HTTP request in a web server.It's also relatively inefficient to create a new database connection for transientgoroutines.
For this type of situation, pgsql.go provides a connection pool type Pool whichallows for safe sharing of multiple connections between any number of goroutinesin the same process.
Can T Find The Postgresql Client Library Libpq Mac Free
To create and use a connection pool, simply do the following (with error handlingomitted):
For a complete example demonstrating connection pool usage, see the filepool_example.go.
Can't Find The Postgresql Client Library (libpq)
About
pgsql.go was written by John E. Barham (jbarham@gmail.com).
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The API is inspired by the gosqlite packageby Russ Cox.
| $sudo gem install activerecord-postgresql-adapter |
| Password: |
| Building native extensions. This could take a while.. |
| ERROR: Error installing activerecord-postgresql-adapter: |
| ERROR: Failed to build gem native extension. |
| /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb |
| checking for pg_config.. yes |
| Using config values from /usr/bin/pg_config |
| checking for libpq-fe.h.. yes |
| checking for libpq/libpq-fs.h.. yes |
| checking for pg_config_manual.h.. yes |
| checking for PQconnectdb() in -lpq.. no |
| checking for PQconnectdb() in -llibpq.. no |
| checking for PQconnectdb() in -lms/libpq.. no |
| Can't find the PostgreSQL client library (libpq) |
| *** extconf.rb failed *** |
| Could not create Makefile due to some reason, probably lack of |
| necessary libraries and/or headers. Check the mkmf.log file for more |
| details. You may need configuration options. |
| Provided configuration options: |
| --with-opt-dir |
| --without-opt-dir |
| --with-opt-include |
| --without-opt-include=${opt-dir}/include |
| --with-opt-lib |
| --without-opt-lib=${opt-dir}/lib |
| --with-make-prog |
| --without-make-prog |
| --srcdir=. |
| --curdir |
| --ruby=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby |
| --with-pg |
| --without-pg |
| --with-pg-dir |
| --without-pg-dir |
| --with-pg-include |
| --without-pg-include=${pg-dir}/include |
| --with-pg-lib |
| --without-pg-lib=${pg-dir}/lib |
| --with-pg-config |
| --without-pg-config |
| --with-pg_config |
| --without-pg_config |
| --with-pqlib |
| --without-pqlib |
| --with-libpqlib |
| --without-libpqlib |
| --with-ms/libpqlib |
| --without-ms/libpqlib |
| Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/pg-0.15.1 for inspection. |
| Results logged to /Library/Ruby/Gems/1.8/gems/pg-0.15.1/ext/gem_make.out |
| TRY THIS |
| $ brew install PostgreSQL |
| > Installing postgresql dependency: readline |
| > Downloading http://ftpmirror.gnu.org/readline/readline-6.2.tar.gz |
| ######################################################################## 100.0% |
| > Patching |
| patching file callback.c |
| patching file input.c |
| patching file patchlevel |
| patching file support/shobj-conf |
| patching file vi_mode.c |
| > ./configure --prefix=/opt/boxen/homebrew/Cellar/readline/6.2.4 --mandir=/opt |
| > make install |
| > Caveats |
| This formula is keg-only: so it was not symlinked into /opt/boxen/homebrew. |
| OS X provides the BSD libedit library, which shadows libreadline. |
| In order to prevent conflicts when programs look for libreadline we are |
| defaulting this GNU Readline installation to keg-only. |
| Generally there are no consequences of this for you. If you build your |
| own software and it requires this formula, you'll need to add to your |
| build variables: |
| LDFLAGS: -L/opt/boxen/homebrew/opt/readline/lib |
| CPPFLAGS: -I/opt/boxen/homebrew/opt/readline/include |
| > Summary |
| 🍺 /opt/boxen/homebrew/Cellar/readline/6.2.4: 31 files, 1.6M, built in 33 seconds |
| > Installing postgresql dependency: ossp-uuid |
| > Downloading ftp://ftp.ossp.org/pkg/lib/uuid/uuid-1.6.2.tar.gz |
| curl: (7) couldn't connect to host |
| Trying a mirror.. |
| > Downloading http://gnome-build-stage-1.googlecode.com/files/uuid-1.6.2.tar.g |
| ######################################################################## 100.0% |
| > ./configure --prefix=/opt/boxen/homebrew/Cellar/ossp-uuid/1.6.2 --without-pe |
| > make |
| > make install |
| > Caveats |
| This formula is keg-only: so it was not symlinked into /opt/boxen/homebrew. |
| OS X provides a uuid.h which conflicts with ossp-uuid's header. |
| Generally there are no consequences of this for you. If you build your |
| own software and it requires this formula, you'll need to add to your |
| build variables: |
| LDFLAGS: -L/opt/boxen/homebrew/opt/ossp-uuid/lib |
| CPPFLAGS: -I/opt/boxen/homebrew/opt/ossp-uuid/include |
| > Summary |
| 🍺 /opt/boxen/homebrew/Cellar/ossp-uuid/1.6.2: 15 files, 232K, built in 24 seconds |
| > Installing postgresql |
| > Downloading http://ftp.postgresql.org/pub/source/v9.2.4/postgresql-9.2.4.tar |
| ######################################################################## 100.0% |
| > Patching |
| patching file src/pl/plpython/Makefile |
| patching file contrib/uuid-ossp/uuid-ossp.c |
| > ./configure --prefix=/opt/boxen/homebrew/Cellar/postgresql/9.2.4 --datadir=/ |
| > make install-world |
| > Caveats |
| # Build Notes |
| If builds of PostgreSQL 9 are failing and you have version 8.x installed, |
| you may need to remove the previous version first. See: |
| https://github.com/mxcl/homebrew/issues/issue/2510 |
| To build plpython against a specific Python, set PYTHON prior to brewing: |
| PYTHON=/usr/local/bin/python brew install postgresql |
| See: |
| http://www.postgresql.org/docs/9.2/static/install-procedure.html |
| # Create/Upgrade a Database |
| If this is your first install, create a database with: |
| initdb /opt/boxen/homebrew/var/postgres -E utf8 |
| To migrate existing data from a previous major version (pre-9.2) of PostgreSQL, see: |
| http://www.postgresql.org/docs/9.2/static/upgrading.html |
| # Loading Extensions |
| By default, Homebrew builds all available Contrib extensions. To see a list of all |
| available extensions, from the psql command line, run: |
| SELECT * FROM pg_available_extensions; |
| To load any of the extension names, navigate to the desired database and run: |
| CREATE EXTENSION [extension name]; |
| For instance, to load the tablefunc extension in the current database, run: |
| CREATE EXTENSION tablefunc; |
| For more information on the CREATE EXTENSION command, see: |
| http://www.postgresql.org/docs/9.2/static/sql-createextension.html |
| For more information on extensions, see: |
| http://www.postgresql.org/docs/9.2/static/contrib.html |
| # Other |
| Some machines may require provisioning of shared memory: |
| http://www.postgresql.org/docs/9.2/static/kernel-resources.html#SYSVIPC |
| To install postgresql (and ossp-uuid) in 32-bit mode: |
| brew install postgresql --32-bit |
| If you want to install the postgres gem, including ARCHFLAGS is recommended: |
| env ARCHFLAGS='-arch x86_64' gem install pg |
| To install gems without sudo, see the Homebrew wiki. |
| To have launchd start postgresql at login: |
| ln -sfv /opt/boxen/homebrew/opt/postgresql/*.plist ~/Library/LaunchAgents |
| Then to load postgresql now: |
| launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist |
| Or, if you don't want/need launchctl, you can just run: |
| pg_ctl -D /opt/boxen/homebrew/var/postgres -l /opt/boxen/homebrew/var/postgres/server.log start |
| > Summary |
| 🍺 /opt/boxen/homebrew/Cellar/postgresql/9.2.4: 2831 files, 39M, built in 4.3 minutes |