[GRASS5] postgresql.m4 autoconf feature macro test

GRASS GRASS developer
1

Here's a little PostgreSQL feature macro. I appended it to an
aclocal.m4 in a test config env, and added these to Makefile.am:

PQINCPATH = @PQINCPATH@
PQLIB = @PQLIB@

Since GRASS currently doesn't use those, the subst variables can be put
in Makefile.in, and I suppose the macro can be added in aclocal.m4 at
the top directory. It's real simple and assumes libpq is in the default
search path. ./config options could be added. configure.in will need
POSTGRESQL_CHECKS on a line somewhere. Anyway, it should work for most
standard configurations.

<postgresql.m4>
# Checks for libpq and libpq-fe.h, sets variables if found.
AC_DEFUN(POSTGRESQL_CHECKS, [
  AC_SUBST(PQINCPATH)
  AC_SUBST(PQLIB)

echo Checking if PostgreSQL is available

dnl Check for PQLIB first.
AC_CHECK_LIB(pq,PQconnectdb,FOUND_PQLIB=1)
if test $FOUND_PQLIB ; then
  PQLIB="-lpq"
else
  echo PostgreSQL library not found in default library path.
  exit 0
fi

dnl Check for PQINCPATH
if test -d /usr/include/pgsql ; then
  pg_inc_dir="/usr/include/pgsql"
elif test -d /usr/include/postgresql ; then
  pg_inc_dir="/usr/include/postgresql"
elif test -d /usr/local/psql/include ; then
  pg_inc_dir="/usr/local/psql/include"
elif test -d /opt/psql/include ; then
  pg_inc_dir="/opt/psql/include"
else
  echo PostgreSQL includes directory not found!
  PQLIB=""
  exit 0
fi

dnl Check for libpq-fe.h
AC_CHECK_HEADERS("$pg_inc_dir/libpq-fe.h")
if test $HAVE_HEADER-LIBPQ-FE.H ; then
  PQINCPATH="-I$pg_inc_dir"
else
  echo PostgreSQL header libpq-fe.h not found!
  PQLIB=""
  exit 0
fi

echo PostgreSQL configuration successful.
])
</postgresql.m4>

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2

Here's a follow-up. I made said changes to my set-up, and it seems to
work. However, when I re-ran autoconf, it didn't like the
AC_BINDIR_DEFAULT(/usr/local/bin) in configure.in. Commenting it out
makes no difference since BINDIR=/usr/local/bin is defined later.

So, if anyone want's to test this on their set-up:
1. Copy the lines below between <postgresql.m4></postgresql.m4> to
   a file called aclocal.m4 at the top of the grass tree.
2. Apply this diff to Makefile.in and configure.in:

Index: Makefile.in

RCS file: /home/grass/grassrepository/grass/Makefile.in,v
retrieving revision 1.22
diff -r1.22 Makefile.in
14a15,17

PQLIB= @PQLIB@
PQINCPATH= @PQINCPATH@

Index: configure.in

RCS file: /home/grass/grassrepository/grass/configure.in,v
retrieving revision 1.1.1.1
diff -r1.1.1.1 configure.in
3c3
< AC_BINDIR_DEFAULT(/usr/local/bin)
---

dnl AC_BINDIR_DEFAULT(/usr/local/bin)

241a242

POSTGRESQL_CHECKS

3. Run autoconf
4. ./configure

Note: None of the Postgresql modules use these variables yet and the
a decision needs to be made about enabling/disabling postgresql modules.

Q. Should there be a --enable-postgres flag?
  If so, the m4 macro should have failure points changed from exit
  0 to exit 1 (so configure fails).
OR

Q. Should postgresql support be automatic if the variables are defined?

Does this matter to anyone?

I suppose I could request CVS write access. Bernard?

On Thu, Sep 14, 2000 at 11:29:32PM -0700, Eric G . Miller wrote:

Here's a little PostgreSQL feature macro. I appended it to an
aclocal.m4 in a test config env, and added these to Makefile.am:

PQINCPATH = @PQINCPATH@
PQLIB = @PQLIB@

Since GRASS currently doesn't use those, the subst variables can be put
in Makefile.in, and I suppose the macro can be added in aclocal.m4 at
the top directory. It's real simple and assumes libpq is in the default
search path. ./config options could be added. configure.in will need
POSTGRESQL_CHECKS on a line somewhere. Anyway, it should work for most
standard configurations.

<postgresql.m4>
# Checks for libpq and libpq-fe.h, sets variables if found.
AC_DEFUN(POSTGRESQL_CHECKS, [
  AC_SUBST(PQINCPATH)
  AC_SUBST(PQLIB)

echo Checking if PostgreSQL is available

dnl Check for PQLIB first.
AC_CHECK_LIB(pq,PQconnectdb,FOUND_PQLIB=1)
if test $FOUND_PQLIB ; then
  PQLIB="-lpq"
else
  echo PostgreSQL library not found in default library path.
  exit 0
fi

dnl Check for PQINCPATH
if test -d /usr/include/pgsql ; then
  pg_inc_dir="/usr/include/pgsql"
elif test -d /usr/include/postgresql ; then
  pg_inc_dir="/usr/include/postgresql"
elif test -d /usr/local/psql/include ; then
  pg_inc_dir="/usr/local/psql/include"
elif test -d /opt/psql/include ; then
  pg_inc_dir="/opt/psql/include"
else
  echo PostgreSQL includes directory not found!
  PQLIB=""
  exit 0
fi

dnl Check for libpq-fe.h
AC_CHECK_HEADERS("$pg_inc_dir/libpq-fe.h")
if test $HAVE_HEADER-LIBPQ-FE.H ; then
  PQINCPATH="-I$pg_inc_dir"
else
  echo PostgreSQL header libpq-fe.h not found!
  PQLIB=""
  exit 0
fi

echo PostgreSQL configuration successful.
])
</postgresql.m4>

--
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