Re: What generates pg_config.h?

On 01/05/2018 09:07 AM, Travis Allison wrote:

Hi,

I have postgres 9.5 and 9.6 installed.  pg_config points to 9.6.
I am trying to compile a postgresql plugin (Timescaledb).  I am getting an error:
-----------------------------------------------
/usr/include/postgresql/pg_config.h:733:0: warning: "PACKAGE_VERSION" redefined
  #define PACKAGE_VERSION "10.0"
  ^
In file included from /usr/include/postgresql/9.6/server/c.h:53:0,
                  from /usr/include/postgresql/9.6/server/postgres.h:47,
                  from /mnt/data/timescaledb/src/init.c:1:
/usr/include/postgresql/9.6/server/pg_config.h:740:0: note: this is the location of the previous definition
  #define PACKAGE_VERSION "9.6.5"
-----------------------------------------------------

The command pg_config gives the following:

---------------------------------------
BINDIR = /usr/lib/postgresql/9.6/bin
DOCDIR = /usr/share/doc/postgresql-doc-9.6
HTMLDIR = /usr/share/doc/postgresql-doc-9.6
INCLUDEDIR = /usr/include/postgresql
PKGINCLUDEDIR = /usr/include/postgresql
INCLUDEDIR-SERVER = /usr/include/postgresql/9.6/server
LIBDIR = /usr/lib/x86_64-linux-gnu
PKGLIBDIR = /usr/lib/postgresql/9.6/lib
LOCALEDIR = /usr/share/locale
MANDIR = /usr/share/postgresql/9.6/man
SHAREDIR = /usr/share/postgresql/9.6
SYSCONFDIR = /etc/postgresql-common

PGXS = /usr/lib/postgresql/9.6/lib/pgxs/src/makefiles/pgxs.mk <http://pgxs.mk>
CONFIGURE = '--with-tcl' '--with-perl' '--with-python' '--with-pam' '--with-openssl' '--with-libxml' '--with-libxslt' '--with-tclconfig=/usr/lib/x86_64-linux-gnu/tcl8.6' '--with-includes=/usr/include/tcl8.6' 'PYTHON=/usr/bin/python' '--mandir=/usr/share/postgresql/9.6/man' '--docdir=/usr/share/doc/postgresql-doc-9.6' '--sysconfdir=/etc/postgresql-common' '--datarootdir=/usr/share/' '--datadir=/usr/share/postgresql/9.6' '--bindir=/usr/lib/postgresql/9.6/bin' '--libdir=/usr/lib/x86_64-linux-gnu/' '--libexecdir=/usr/lib/postgresql/' '--includedir=/usr/include/postgresql/' '--enable-nls' '--enable-integer-datetimes' '--enable-thread-safety' '--enable-tap-tests' '--enable-debug' '--disable-rpath' '--with-uuid=e2fs' '--with-gnu-ld' '--with-pgport=5432' '--with-system-tzdata=/usr/share/zoneinfo' '--with-systemd' 'CFLAGS=-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -fPIC -pie -fno-omit-frame-pointer' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now' '--with-gssapi' '--with-ldap' '--with-includes=/usr/include/mit-krb5' '--with-libs=/usr/lib/mit-krb5' '--with-libs=/usr/lib/x86_64-linux-gnu/mit-krb5' '--with-selinux' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2'
CC = gcc
CPPFLAGS = -DFRONTEND -Wdate-time -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -I/usr/include/libxml2 -I/usr/include/mit-krb5
CFLAGS = -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -g -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -fPIC -pie -fno-omit-frame-pointer
CFLAGS_SL = -fPIC
LDFLAGS = -L../../src/common -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -L/usr/lib/x86_64-linux-gnu/mit-krb5 -Wl,--as-needed
LDFLAGS_EX =
LDFLAGS_SL =
LIBS = -lpgcommon -lpgport -lselinux -lxslt -lxml2 -lpam -lssl -lcrypto -lgssapi_krb5 -lz -ledit -lrt -lcrypt -ldl -lm
VERSION = PostgreSQL 9.6.5
-------------------------------------------------

So my question is: what is generating the /usr/include/postgresql/pg_config.h file?  Why is it different than the /usr/include/postgresql/9.6/server/pg_config.h file?

I am guessing you have some part of Postgres 10 installed. During the build the extension is getting to /usr/include/postgresql/pg_config.h before it gets to /usr/include/postgresql/9.6/server/pg_config.h.  Crank up your package manager and see what your distro has installed? Along that line knowing what distro and version you are using as well as how you installed Postgres 9.5 and 9.6 would be helpful.

Thanks!

Travis

--
Adrian Klaver
adrian.klaver@aklaver.com