+# ===========================================================================

+# http://autoconf-archive.cryp.to/ax_lib_expat.html

+# ===========================================================================

+#

+# SYNOPSIS

+#

+# AX_LIB_EXPAT([MINIMUM-VERSION])

+#

+# DESCRIPTION

+#

+# This macro provides tests of availability of Expat XML Parser of

+# particular version or newer. This macro checks for Expat XML Parser

+# headers and libraries and defines compilation flags

+#

+# Macro supports following options and their values:

+#

+# 1) Single-option usage:

+#

+# --with-expat -- yes, no, or path to Expat XML Parser

+# installation prefix

+#

+# 2) Three-options usage (all options are required):

+#

+# --with-expat=yes

+# --with-expat-inc -- path to base directory with Expat headers

+# --with-expat-lib -- linker flags for Expat

+#

+# This macro calls:

+#

+# AC_SUBST(EXPAT_CFLAGS)

+# AC_SUBST(EXPAT_LDFLAGS)

+# AC_SUBST(EXPAT_VERSION) -- only if version requirement is used

+#

+# And sets:

+#

+# HAVE_EXPAT

+#

+# LAST MODIFICATION

+#

+# 2008-04-12

+#

+# COPYLEFT

+#

+# Copyright (c) 2008 Mateusz Loskot <mateusz@loskot.net>

+#

+# Copying and distribution of this file, with or without modification, are

+# permitted in any medium without royalty provided the copyright notice

+# and this notice are preserved.

+

+AC_DEFUN([AX_LIB_EXPAT],

+[

+ AC_ARG_WITH([expat],

+ AC_HELP_STRING([--with-expat=@<:@ARG@:>@],

+ [use Expat XML Parser from given prefix (ARG=path); check standard prefixes (ARG=yes); disable (ARG=no)]

+ ),

+ [

+ if test "$withval" = "yes"; then

+ if test -f /usr/local/include/expat.h ; then

+ expat_prefix=/usr/local

+ elif test -f /usr/include/expat.h ; then

+ expat_prefix=/usr

+ else

+ expat_prefix=""

+ fi

+ expat_requested="yes"

+ elif test -d "$withval"; then

+ expat_prefix="$withval"

+ expat_requested="yes"

+ else

+ expat_prefix=""

+ expat_requested="no"

+ fi

+ ],

+ [

+ dnl Default behavior is implicit yes

+ if test -f /usr/local/include/expat.h ; then

+ expat_prefix=/usr/local

+ elif test -f /usr/include/expat.h ; then

+ expat_prefix=/usr

+ else

+ expat_prefix=""

+ fi

+ ]

+ )

+

+ AC_ARG_WITH([expat-inc],

+ AC_HELP_STRING([--with-expat-inc=@<:@DIR@:>@],

+ [path to Expat XML Parser headers]

+ ),

+ [expat_include_dir="$withval"],

+ [expat_include_dir=""]

+ )

+ AC_ARG_WITH([expat-lib],

+ AC_HELP_STRING([--with-expat-lib=@<:@ARG@:>@],

+ [link options for Expat XML Parser libraries]

+ ),

+ [expat_lib_flags="$withval"],

+ [expat_lib_flags=""]

+ )

+

+ EXPAT_CFLAGS=""

+ EXPAT_LDFLAGS=""

+ EXPAT_VERSION=""

+

+ dnl

+ dnl Collect include/lib paths and flags

+ dnl

+ run_expat_test="no"

+

+ if test -n "$expat_prefix"; then

+ expat_include_dir="$expat_prefix/include"

+ expat_lib_flags="-L$expat_prefix/lib"

+ expat_libs="-lexpat"

+ run_expat_test="yes"

+ elif test "$expat_requested" = "yes"; then

+ if test -n "$expat_include_dir" -a -n "$expat_lib_flags"; then

+ run_expat_test="yes"

+ fi

+ else

+ run_expat_test="no"

+ fi

+

+ dnl

+ dnl Check Expat XML Parser files

+ dnl

+ if test "$run_expat_test" = "yes"; then

+

+ saved_CPPFLAGS="$CPPFLAGS"

+ CPPFLAGS="$CPPFLAGS -I$expat_include_dir"

+

+ saved_LDFLAGS="$LDFLAGS"

+ LDFLAGS="$LDFLAGS $expat_lib_flags"

+ LIBS="$LIBS $expat_libs"

+

+ dnl

+ dnl Check Expat headers

+ dnl

+ AC_MSG_CHECKING([for Expat XML Parser headers in $expat_include_dir])

+

+ AC_LANG_PUSH([C++])

+ AC_COMPILE_IFELSE([

+ AC_LANG_PROGRAM(

+ [[

+@%:@include <expat.h>

+ ]],

+ [[]]

+ )],

+ [

+ EXPAT_CFLAGS="-I$expat_include_dir"

+ expat_header_found="yes"

+ AC_MSG_RESULT([found])

+ ],

+ [

+ expat_header_found="no"

+ AC_MSG_RESULT([not found])

+ ]

+ )

+ AC_LANG_POP([C++])

+

+ dnl

+ dnl Check Expat libraries

+ dnl

+ if test "$expat_header_found" = "yes"; then

+

+ AC_MSG_CHECKING([for Expat XML Parser libraries])

+

+ AC_LANG_PUSH([C++])

+ AC_LINK_IFELSE([

+ AC_LANG_PROGRAM(

+ [[

+@%:@include <expat.h>

+ ]],

+ [[

+XML_Parser p = XML_ParserCreate(NULL);

+XML_ParserFree(p);

+p = NULL;

+ ]]

+ )],

+ [

+ EXPAT_LDFLAGS="$expat_lib_flags"

+ EXPAT_LIBS="$expat_libs"

+ expat_lib_found="yes"

+ AC_MSG_RESULT([found])

+ ],

+ [

+ expat_lib_found="no"

+ AC_MSG_RESULT([not found])

+ ]

+ )

+ AC_LANG_POP([C++])

+ fi

+

+ CPPFLAGS="$saved_CPPFLAGS"

+ LDFLAGS="$saved_LDFLAGS"

+ fi

+

+ AC_MSG_CHECKING([for Expat XML Parser])

+

+ if test "$run_expat_test" = "yes"; then

+ if test "$expat_header_found" = "yes" -a "$expat_lib_found" = "yes"; then

+

+ AC_SUBST([EXPAT_CFLAGS])

+ AC_SUBST([EXPAT_LDFLAGS])

+

+ HAVE_EXPAT="yes"

+ else

+ HAVE_EXPAT="no"

+ fi

+

+ AC_MSG_RESULT([$HAVE_EXPAT])

+

+ dnl

+ dnl Check Expat version

+ dnl

+ if test "$HAVE_EXPAT" = "yes"; then

+

+ expat_version_req=ifelse([$1], [], [], [$1])

+

+ if test -n "$expat_version_req"; then

+

+ AC_MSG_CHECKING([if Expat XML Parser version is >= $expat_version_req])

+

+ if test -f "$expat_include_dir/expat.h"; then

+

+ expat_major=`cat $expat_include_dir/expat.h | \

+ grep '^#define.*XML_MAJOR_VERSION.*[0-9]$' | \

+ sed -e 's/#define XML_MAJOR_VERSION.//'`

+

+ expat_minor=`cat $expat_include_dir/expat.h | \

+ grep '^#define.*XML_MINOR_VERSION.*[0-9]$' | \

+ sed -e 's/#define XML_MINOR_VERSION.//'`

+

+ expat_revision=`cat $expat_include_dir/expat.h | \

+ grep '^#define.*XML_MICRO_VERSION.*[0-9]$' | \

+ sed -e 's/#define XML_MICRO_VERSION.//'`

+

+ EXPAT_VERSION="$expat_major.$expat_minor.$expat_revision"

+ AC_SUBST([EXPAT_VERSION])

+

+ dnl Decompose required version string and calculate numerical representation

+ expat_version_req_major=`expr $expat_version_req : '\([[0-9]]*\)'`

+ expat_version_req_minor=`expr $expat_version_req : '[[0-9]]*\.\([[0-9]]*\)'`

+ expat_version_req_revision=`expr $expat_version_req : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`

+ if test "x$expat_version_req_revision" = "x"; then

+ expat_version_req_revision="0"

+ fi

+

+ expat_version_req_number=`expr $expat_version_req_major \* 10000 \

+ \+ $expat_version_req_minor \* 100 \

+ \+ $expat_version_req_revision`

+

+ dnl Calculate numerical representation of detected version

+ expat_version_number=`expr $expat_major \* 10000 \

+ \+ $expat_minor \* 100 \

+ \+ $expat_revision`

+

+ expat_version_check=`expr $expat_version_number \>\= $expat_version_req_number`

+ if test "$expat_version_check" = "1"; then

+ AC_MSG_RESULT([yes])

+ else

+ AC_MSG_RESULT([no])

+ AC_MSG_WARN([Found Expat XML Parser $EXPAT_VERSION, which is older than required. Possible compilation failure.])

+ fi

+ else

+ AC_MSG_RESULT([no])

+ AC_MSG_WARN([Missing expat.h header. Unable to determine Expat version.])

+ fi

+ fi

+ fi

+

+ else

+ HAVE_EXPAT="no"

+ AC_MSG_RESULT([$HAVE_EXPAT])

+

+ if test "$expat_requested" = "yes"; then

+ 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])

+ fi

+ fi

+])