# file      : build/bootstrap.build
# copyright : Copyright (c) 2016-2019 Code Synthesis Ltd
# license   : PostgreSQL License; see accompanying COPYRIGHT file

project = libpq

using version
using config
using dist
using test
using install

# PostgreSQL releases (for quite a long time) had the 3-component versions,
# where the first 2 components denote a major version and the third one the
# minor version. This has changed starting from version 10, with the major
# version represented by a single component. Minor releases are guaranteed to
# be backwards-compatible and contain only bug fixes. See also:
#
# https://www.postgresql.org/support/versioning/
#
# There is no document that describes libpq ABI versioning and compatibility
# rules, so everything that follows is just a guess.
#
# The library naming schema on POSIX is libpq.so.<so_major>.<so_minor> with
# the so_minor number incremented with each major release unless the so_major
# number is incremented, in which case it is reset to 0. It is unclear when
# the so_major is incremented (it, for example, hasn't been in the 9.6 to
# 10 transition).
#
# The <so_major>.<so_minor> pair constitutes the version of the ABI that is
# backwards-compatible between PostgreSQL minor releases. However, we can not
# deduce the ABI version from the release major version and will have to check
# it for each major release by examining the SO_MAJOR_VERSION and
# SO_MINOR_VERSION variables in src/interfaces/libpq/Makefile.
#
if ($version.major == 9 && $version.minor == 6)
{
  abi_major = 5
  abi_minor = 9
}
else
  fail "increment the ABI version?"

abi_version = $abi_major.$abi_minor