# Citus autoconf input script.
#
# Converted into an actual configure script by autogen.sh. This
# conversion only has to be done when configure.in changes. To avoid
# everyone needing autoconf installed, the resulting files are checked
# into the SCM.

AC_INIT([Citus], [5.0], [], [citus], [])
AC_COPYRIGHT([Copyright (c) 2012-2016, Citus Data, Inc.])

AC_PROG_SED

# Re-check for flex. That allows to compile citus against a postgres
# which was built without flex available (possible because generated
# files are included)
AC_PATH_PROG([FLEX], [flex])

# Locate pg_config binary
AC_ARG_VAR([PG_CONFIG], [Location to find pg_config for target PostgreSQL instalation (default PATH)])
AC_ARG_VAR([PATH], [PATH for target PostgreSQL install pg_config])

if test -z "$PG_CONFIG"; then
  AC_PATH_PROG(PG_CONFIG, pg_config)
fi

if test -z "$PG_CONFIG"; then
   AC_MSG_ERROR([Could not find pg_config. Set PG_CONFIG or PATH.])
fi

# check we're building against a supported version of PostgreSQL
citusac_pg_config_version=$($PG_CONFIG --version 2>/dev/null)
version_num=$(echo "$citusac_pg_config_version"|
              $SED -e 's/^PostgreSQL \([[0-9]]*\)\.\([[0-9]]*\)\([[a-zA-Z0-9.]]*\)$/\1.\2/')

if test -z "$version_num"; then
  AC_MSG_ERROR([Could not detect PostgreSQL version from pg_config.])
fi

if test "$version_num" != '9.5'; then
   AC_MSG_ERROR([Citus is not compatible with the detected PostgreSQL version ${version_num}.])
else
   AC_MSG_NOTICE([building against PostgreSQL $version_num])
fi;

# Check whether we're building inside the source tree, if not, prepare
# the build directory.
if test "$srcdir" -ef '.' ; then
  vpath_build=no
else
  vpath_build=yes
  _AS_ECHO_N([preparing build tree... ])
  citusac_abs_top_srcdir=`cd "$srcdir" && pwd`
  $SHELL "$citusac_abs_top_srcdir/prep_buildtree" "$citusac_abs_top_srcdir" "." \
      || AC_MSG_ERROR(failed)
  AC_MSG_RESULT(done)
fi
AC_SUBST(vpath_build)

# Allow to overwrite the C compiler, default to the one postgres was
# compiled with. We don't want autoconf's default CFLAGS though, so save
# those.
SAVE_CFLAGS="$CFLAGS"
AC_PROG_CC([$($PG_CONFIG --cc)])
CFLAGS="$SAVE_CFLAGS"

# check for a number of CFLAGS that make development easier

# CITUSAC_PROG_CC_CFLAGS_OPT
# -----------------------
# Given a string, check if the compiler supports the string as a
# command-line option. If it does, add the string to CFLAGS.
AC_DEFUN([CITUSAC_PROG_CC_CFLAGS_OPT],
[define([Ac_cachevar], [AS_TR_SH([citusac_cv_prog_cc_cflags_$1])])dnl
AC_CACHE_CHECK([whether $CC supports $1], [Ac_cachevar],
[citusac_save_CFLAGS=$CFLAGS
CFLAGS="$citusac_save_CFLAGS $1"
ac_save_c_werror_flag=$ac_c_werror_flag
ac_c_werror_flag=yes
_AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
                   [Ac_cachevar=yes],
                   [Ac_cachevar=no])
ac_c_werror_flag=$ac_save_c_werror_flag
CFLAGS="$citusac_save_CFLAGS"])
if test x"$Ac_cachevar" = x"yes"; then
  CITUS_CFLAGS="$CITUS_CFLAGS $1"
fi
undefine([Ac_cachevar])dnl
])# CITUSAC_PROG_CC_CFLAGS_OPT

CITUSAC_PROG_CC_CFLAGS_OPT([-Wall])
CITUSAC_PROG_CC_CFLAGS_OPT([-Wextra])
# disarm options included in the above, which are too noisy for now
CITUSAC_PROG_CC_CFLAGS_OPT([-Wno-unused-parameter])
CITUSAC_PROG_CC_CFLAGS_OPT([-Wno-sign-compare])
CITUSAC_PROG_CC_CFLAGS_OPT([-Wno-missing-field-initializers])
CITUSAC_PROG_CC_CFLAGS_OPT([-Wno-clobbered])
# And add a few extra warnings
CITUSAC_PROG_CC_CFLAGS_OPT([-Wdeclaration-after-statement])
CITUSAC_PROG_CC_CFLAGS_OPT([-Wendif-labels])
CITUSAC_PROG_CC_CFLAGS_OPT([-Wmissing-format-attribute])
CITUSAC_PROG_CC_CFLAGS_OPT([-Wmissing-declarations])
CITUSAC_PROG_CC_CFLAGS_OPT([-Wmissing-prototypes])

AC_SUBST(CITUS_CFLAGS, "$CITUS_CFLAGS")

AC_CONFIG_FILES([Makefile.global])
AC_CONFIG_HEADERS([src/include/citus_config.h])
AH_TOP([
/*
 * citus_config.h.in is generated by autoconf/autoheader and
 * converted into citus_config.h by configure.  Include when code needs to
 * depend on determinations made by configure.
 *
 * Do not manually edit!
 */
])
AC_OUTPUT