~drizzle-trunk/drizzle/development

dnl -*- mode: m4; c-basic-offset: 2; indent-tabs-mode: nil; -*-

dnl vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

dnl   

dnl pandora-build: A pedantic build system

dnl Copyright (C) 2009 Sun Microsystems, Inc.

dnl This file is free software; Sun Microsystems

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

dnl

dnl From Monty Taylor

dnl --------------------------------------------------------------------

dnl  Check for Google Proto Buffers

dnl --------------------------------------------------------------------

AC_DEFUN([_PANDORA_SEARCH_LIBPROTOBUF],[

  AC_REQUIRE([PANDORA_HAVE_PTHREAD])

  AC_LANG_PUSH([C++])

  save_CXXFLAGS="${CXXFLAGS}"

  CXXFLAGS="${PTHREAD_CFLAGS} ${CXXFLAGS}"

  AC_LIB_HAVE_LINKFLAGS(protobuf,,

    [#include <google/protobuf/descriptor.h>],

    [google::protobuf::FileDescriptor* file;],

    [system])

  CXXFLAGS="${save_CXXFLAGS}"

  AC_LANG_POP()

])

AC_DEFUN([PANDORA_HAVE_LIBPROTOBUF],[

  AC_REQUIRE([_PANDORA_SEARCH_LIBPROTOBUF])

])

AC_DEFUN([PANDORA_REQUIRE_LIBPROTOBUF],[

  AC_REQUIRE([PANDORA_HAVE_LIBPROTOBUF])

  AS_IF([test x$ac_cv_libprotobuf = xno],

      AC_MSG_ERROR([libprotobuf is required for ${PACKAGE}. On Debian this can be found in libprotobuf-dev. On RedHat this can be found in protobuf-devel.]))

])

AC_DEFUN([PANDORA_PROTOBUF_REQUIRE_VERSION],[

  AC_REQUIRE([_PANDORA_SEARCH_LIBPROTOBUF])

  p_recent_ver=$1

  p_recent_ver_major=`echo $p_recent_ver | cut -f1 -d.`

  p_recent_ver_minor=`echo $p_recent_ver | cut -f2 -d.`

  p_recent_ver_patch=`echo $p_recent_ver | cut -f3 -d.`

  p_recent_ver_hex=`printf "%d%03d%03d" $p_recent_ver_major $p_recent_ver_minor $p_recent_ver_patch` 

  AC_LANG_PUSH([C++])

  AC_CACHE_CHECK([for protobuf >= $p_recent_ver],

    [drizzle_cv_protobuf_recent],

    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[

#include <google/protobuf/descriptor.h>

#if GOOGLE_PROTOBUF_VERSION < $p_recent_ver_hex

# error Your version of Protobuf is too old

#endif

      ]])],

    [drizzle_cv_protobuf_recent=yes],

    [drizzle_cv_protobuf_recent=no])])

  AS_IF([test "$drizzle_cv_protobuf_recent" = "no"],[

    AC_MSG_ERROR([Your version of Google Protocol Buffers is too old. ${PACKAGE} requires at least version $p_recent_ver])

  ])

  AC_LANG_POP()

])

AC_DEFUN([_PANDORA_SEARCH_PROTOC],[

  AC_REQUIRE([_PANDORA_SEARCH_LIBPROTOBUF])

  AC_PATH_PROG([PROTOC],[protoc],[no],[$LIBPROTOBUF_PREFIX/bin:$PATH])

])

AC_DEFUN([PANDORA_HAVE_PROTOC],[

  AC_REQUIRE([_PANDORA_SEARCH_PROTOC])

])

AC_DEFUN([PANDORA_REQUIRE_PROTOC],[

  AC_REQUIRE([PANDORA_HAVE_PROTOC])

  AS_IF([test "x$PROTOC" = "xno"],[

    AC_MSG_ERROR([Couldn't find the protoc compiler. On Debian this can be found in protobuf-compiler. On RedHat this can be found in protobuf-compiler.])

  ])

])