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AX_LIB_EXPAT([MINIMUM-VERSION])
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
Mateusz Loskot <mateusz@loskot.net>
2008-04-12
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 -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"
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_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
])
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