adam@1: # ===========================================================================
adam@1: #       http://www.gnu.org/software/autoconf-archive/ax_lib_expat.html
adam@1: # ===========================================================================
adam@1: #
adam@1: # SYNOPSIS
adam@1: #
adam@1: #   AX_LIB_EXPAT([MINIMUM-VERSION])
adam@1: #
adam@1: # DESCRIPTION
adam@1: #
adam@1: #   This macro provides tests of availability of Expat XML Parser of
adam@1: #   particular version or newer. This macro checks for Expat XML Parser
adam@1: #   headers and libraries and defines compilation flags
adam@1: #
adam@1: #   Macro supports following options and their values:
adam@1: #
adam@1: #   1) Single-option usage:
adam@1: #
adam@1: #     --with-expat      -- yes, no, or path to Expat XML Parser
adam@1: #                          installation prefix
adam@1: #
adam@1: #   2) Three-options usage (all options are required):
adam@1: #
adam@1: #     --with-expat=yes
adam@1: #     --with-expat-inc  -- path to base directory with Expat headers
adam@1: #     --with-expat-lib  -- linker flags for Expat
adam@1: #
adam@1: #   This macro calls:
adam@1: #
adam@1: #     AC_SUBST(EXPAT_CFLAGS)
adam@1: #     AC_SUBST(EXPAT_LDFLAGS)
adam@1: #     AC_SUBST(EXPAT_VERSION)  -- only if version requirement is used
adam@1: #
adam@1: #   And sets:
adam@1: #
adam@1: #     HAVE_EXPAT
adam@1: #
adam@1: # LICENSE
adam@1: #
adam@1: #   Copyright (c) 2008 Mateusz Loskot <mateusz@loskot.net>
adam@1: #
adam@1: #   Copying and distribution of this file, with or without modification, are
adam@1: #   permitted in any medium without royalty provided the copyright notice
adam@1: #   and this notice are preserved. This file is offered as-is, without any
adam@1: #   warranty.
adam@1: 
adam@1: #serial 8
adam@1: 
adam@1: AC_DEFUN([AX_LIB_EXPAT],
adam@1: [
adam@1:     AC_ARG_WITH([expat],
adam@1:         AS_HELP_STRING([--with-expat=@<:@ARG@:>@],
adam@1:             [use Expat XML Parser from given prefix (ARG=path); check standard prefixes (ARG=yes); disable (ARG=no)]
adam@1:         ),
adam@1:         [
adam@1:         if test "$withval" = "yes"; then
adam@1:             if test -f /usr/local/include/expat.h ; then
adam@1:                 expat_prefix=/usr/local
adam@1:             elif test -f /usr/include/expat.h ; then
adam@1:                 expat_prefix=/usr
adam@1:             else
adam@1:                 expat_prefix=""
adam@1:             fi
adam@1:             expat_requested="yes"
adam@1:         elif test -d "$withval"; then
adam@1:             expat_prefix="$withval"
adam@1:             expat_requested="yes"
adam@1:         else
adam@1:             expat_prefix=""
adam@1:             expat_requested="no"
adam@1:         fi
adam@1:         ],
adam@1:         [
adam@1:         dnl Default behavior is implicit yes
adam@1:         if test -f /usr/local/include/expat.h ; then
adam@1:             expat_prefix=/usr/local
adam@1:         elif test -f /usr/include/expat.h ; then
adam@1:             expat_prefix=/usr
adam@1:         else
adam@1:             expat_prefix=""
adam@1:         fi
adam@1:         ]
adam@1:     )
adam@1: 
adam@1:     AC_ARG_WITH([expat-inc],
adam@1:         AS_HELP_STRING([--with-expat-inc=@<:@DIR@:>@],
adam@1:             [path to Expat XML Parser headers]
adam@1:         ),
adam@1:         [expat_include_dir="$withval"],
adam@1:         [expat_include_dir=""]
adam@1:     )
adam@1:     AC_ARG_WITH([expat-lib],
adam@1:         AS_HELP_STRING([--with-expat-lib=@<:@ARG@:>@],
adam@1:             [link options for Expat XML Parser libraries]
adam@1:         ),
adam@1:         [expat_lib_flags="$withval"],
adam@1:         [expat_lib_flags=""]
adam@1:     )
adam@1: 
adam@1:     EXPAT_CFLAGS=""
adam@1:     EXPAT_LDFLAGS=""
adam@1:     EXPAT_VERSION=""
adam@1: 
adam@1:     dnl
adam@1:     dnl Collect include/lib paths and flags
adam@1:     dnl
adam@1:     run_expat_test="no"
adam@1: 
adam@1:     if test -n "$expat_prefix"; then
adam@1:         expat_include_dir="$expat_prefix/include"
adam@1:         expat_lib_flags="-L$expat_prefix/lib -lexpat"
adam@1:         run_expat_test="yes"
adam@1:     elif test "$expat_requested" = "yes"; then
adam@1:         if test -n "$expat_include_dir" -a -n "$expat_lib_flags"; then
adam@1:             run_expat_test="yes"
adam@1:         fi
adam@1:     else
adam@1:         run_expat_test="no"
adam@1:     fi
adam@1: 
adam@1:     dnl
adam@1:     dnl Check Expat XML Parser files
adam@1:     dnl
adam@1:     if test "$run_expat_test" = "yes"; then
adam@1: 
adam@1:         saved_CPPFLAGS="$CPPFLAGS"
adam@1:         CPPFLAGS="$CPPFLAGS -I$expat_include_dir"
adam@1: 
adam@1:         saved_LDFLAGS="$LDFLAGS"
adam@1:         LDFLAGS="$LDFLAGS $expat_lib_flags"
adam@1: 
adam@1:         dnl
adam@1:         dnl Check Expat headers
adam@1:         dnl
adam@1:         AC_MSG_CHECKING([for Expat XML Parser headers in $expat_include_dir])
adam@1: 
adam@1:         AC_LANG_PUSH([C++])
adam@1:         AC_COMPILE_IFELSE([
adam@1:             AC_LANG_PROGRAM(
adam@1:                 [[
adam@1: @%:@include <expat.h>
adam@1:                 ]],
adam@1:                 [[]]
adam@1:             )],
adam@1:             [
adam@1:             EXPAT_CFLAGS="-I$expat_include_dir"
adam@1:             expat_header_found="yes"
adam@1:             AC_MSG_RESULT([found])
adam@1:             ],
adam@1:             [
adam@1:             expat_header_found="no"
adam@1:             AC_MSG_RESULT([not found])
adam@1:             ]
adam@1:         )
adam@1:         AC_LANG_POP([C++])
adam@1: 
adam@1:         dnl
adam@1:         dnl Check Expat libraries
adam@1:         dnl
adam@1:         if test "$expat_header_found" = "yes"; then
adam@1: 
adam@1:             AC_MSG_CHECKING([for Expat XML Parser libraries])
adam@1: 
adam@1:             AC_LANG_PUSH([C++])
adam@1:             AC_LINK_IFELSE([
adam@1:                 AC_LANG_PROGRAM(
adam@1:                     [[
adam@1: @%:@include <expat.h>
adam@1:                     ]],
adam@1:                     [[
adam@1: XML_Parser p = XML_ParserCreate(NULL);
adam@1: XML_ParserFree(p);
adam@1: p = NULL;
adam@1:                     ]]
adam@1:                 )],
adam@1:                 [
adam@1:                 EXPAT_LDFLAGS="$expat_lib_flags"
adam@1:                 expat_lib_found="yes"
adam@1:                 AC_MSG_RESULT([found])
adam@1:                 ],
adam@1:                 [
adam@1:                 expat_lib_found="no"
adam@1:                 AC_MSG_RESULT([not found])
adam@1:                 ]
adam@1:             )
adam@1:             AC_LANG_POP([C++])
adam@1:         fi
adam@1: 
adam@1:         CPPFLAGS="$saved_CPPFLAGS"
adam@1:         LDFLAGS="$saved_LDFLAGS"
adam@1:     fi
adam@1: 
adam@1:     AC_MSG_CHECKING([for Expat XML Parser])
adam@1: 
adam@1:     if test "$run_expat_test" = "yes"; then
adam@1:         if test "$expat_header_found" = "yes" -a "$expat_lib_found" = "yes"; then
adam@1: 
adam@1:             AC_SUBST([EXPAT_CFLAGS])
adam@1:             AC_SUBST([EXPAT_LDFLAGS])
adam@1: 
adam@1:             HAVE_EXPAT="yes"
adam@1:         else
adam@1:             HAVE_EXPAT="no"
adam@1:         fi
adam@1: 
adam@1:         AC_MSG_RESULT([$HAVE_EXPAT])
adam@1: 
adam@1:         dnl
adam@1:         dnl Check Expat version
adam@1:         dnl
adam@1:         if test "$HAVE_EXPAT" = "yes"; then
adam@1: 
adam@1:             expat_version_req=ifelse([$1], [], [], [$1])
adam@1: 
adam@1:             if test  -n "$expat_version_req"; then
adam@1: 
adam@1:                 AC_MSG_CHECKING([if Expat XML Parser version is >= $expat_version_req])
adam@1: 
adam@1:                 if test -f "$expat_include_dir/expat.h"; then
adam@1: 
adam@1:                     expat_major=`cat $expat_include_dir/expat.h | \
adam@1:                                     grep '^#define.*XML_MAJOR_VERSION.*[0-9]$' | \
adam@1:                                     sed -e 's/#define XML_MAJOR_VERSION.//'`
adam@1: 
adam@1:                     expat_minor=`cat $expat_include_dir/expat.h | \
adam@1:                                     grep '^#define.*XML_MINOR_VERSION.*[0-9]$' | \
adam@1:                                     sed -e 's/#define XML_MINOR_VERSION.//'`
adam@1: 
adam@1:                     expat_revision=`cat $expat_include_dir/expat.h | \
adam@1:                                     grep '^#define.*XML_MICRO_VERSION.*[0-9]$' | \
adam@1:                                     sed -e 's/#define XML_MICRO_VERSION.//'`
adam@1: 
adam@1:                     EXPAT_VERSION="$expat_major.$expat_minor.$expat_revision"
adam@1:                     AC_SUBST([EXPAT_VERSION])
adam@1: 
adam@1:                     dnl Decompose required version string and calculate numerical representation
adam@1:                     expat_version_req_major=`expr $expat_version_req : '\([[0-9]]*\)'`
adam@1:                     expat_version_req_minor=`expr $expat_version_req : '[[0-9]]*\.\([[0-9]]*\)'`
adam@1:                     expat_version_req_revision=`expr $expat_version_req : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
adam@1:                     if test "x$expat_version_req_revision" = "x"; then
adam@1:                         expat_version_req_revision="0"
adam@1:                     fi
adam@1: 
adam@1:                     expat_version_req_number=`expr $expat_version_req_major \* 10000 \
adam@1:                                                \+ $expat_version_req_minor \* 100 \
adam@1:                                                \+ $expat_version_req_revision`
adam@1: 
adam@1:                     dnl Calculate numerical representation of detected version
adam@1:                     expat_version_number=`expr $expat_major \* 10000 \
adam@1:                                           \+ $expat_minor \* 100 \
adam@1:                                            \+ $expat_revision`
adam@1: 
adam@1:                     expat_version_check=`expr $expat_version_number \>\= $expat_version_req_number`
adam@1:                     if test "$expat_version_check" = "1"; then
adam@1:                         AC_MSG_RESULT([yes])
adam@1:                     else
adam@1:                         AC_MSG_RESULT([no])
adam@1:                         AC_MSG_WARN([Found Expat XML Parser $EXPAT_VERSION, which is older than required. Possible compilation failure.])
adam@1:                     fi
adam@1:                 else
adam@1:                     AC_MSG_RESULT([no])
adam@1:                     AC_MSG_WARN([Missing expat.h header. Unable to determine Expat version.])
adam@1:                 fi
adam@1:             fi
adam@1:         fi
adam@1: 
adam@1:     else
adam@1:         HAVE_EXPAT="no"
adam@1:         AC_MSG_RESULT([$HAVE_EXPAT])
adam@1: 
adam@1:         if test "$expat_requested" = "yes"; then
adam@1:             AC_MSG_WARN([Expat XML Parser support requested but headers or library not found. Specify valid prefix of Expat using --with-expat=@<:@DIR@:>@ or provide include directory and linker flags using --with-expat-inc and --with-expat-lib])
adam@1:         fi
adam@1:     fi
adam@1: ])