neon.m4

linux subdivision ying gai ke yi le ba

# Copyright (C) 1998-2004 Joe Orton <[e-mail]>    -*- autoconf -*-
#
# This file is free software; you may copy and/or distribute it with
# or without modifications, as long as this notice is preserved.
# This software is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY, to the extent permitted by law; without even
# the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
# PURPOSE.

# The above license applies to THIS FILE ONLY, the neon library code
# itself may be copied and distributed under the terms of the GNU
# LGPL, see COPYING.LIB for more details

# This file is part of the neon HTTP/WebDAV client library.
# See http://www.webdav.org/neon/ for the latest version. 
# Please send any feedback to <[e-mail]>

#
# Usage:
#
#      NEON_LIBRARY
# or   NEON_BUNDLED(srcdir, [ACTIONS-IF-BUNDLED], [ACTIONS-IF-NOT_BUNDLED]) 
# or   NEON_VPATH_BUNDLED(srcdir, builddir, 
#			  [ACTIONS-IF-BUNDLED], [ACTIONS-IF-NOT-BUNDLED])
#
#   where srcdir is the location of bundled neon 'src' directory.
#   If using a VPATH-enabled build, builddir is the location of the
#   build directory corresponding to srcdir.
#
#   If a bundled build *is* being used, ACTIONS-IF-BUNDLED will be
#   evaluated. These actions should ensure that 'make' is run
#   in srcdir, and that one of NEON_NORMAL_BUILD or NEON_LIBTOOL_BUILD 
#   is called.
#
# After calling one of the above macros, if the NEON_NEED_XML_PARSER
# variable is set to "yes", then you must configure an XML parser
# too. You can do this your own way, or do it easily using the
# NEON_XML_PARSER() macro. Example usage for where we have bundled the
# neon sources in a directory called libneon, and bundled expat
# sources in a directory called 'expat'.
#
#   NEON_BUNDLED(libneon, [
#	NEON_XML_PARSER(expat)
#	NEON_NORMAL_BUILD
#   ])
#
# Alternatively, for a simple standalone app with neon as a
# dependancy, use just:
#
#   NEON_LIBRARY
# 
# and rely on the user installing neon correctly.
#
# You are free to configure an XML parser any other way you like,
# but the end result must be, either expat or libxml will get linked
# in, and HAVE_EXPAT or HAVE_LIBXML is defined appropriately.
#
# To set up the bundled build environment, call 
#
#    NEON_NORMAL_BUILD
# or
#    NEON_LIBTOOL_BUILD
# 
# depending on whether you are using libtool to build, or not.
# Both these macros take an optional argument specifying the set
# of object files you wish to build: if the argument is not given,
# all of neon will be built.

AC_DEFUN([NEON_BUNDLED],[

neon_bundled_srcdir=$1
neon_bundled_builddir=$1

NEON_COMMON_BUNDLED([$2], [$3])

])

AC_DEFUN([NEON_VPATH_BUNDLED],[

neon_bundled_srcdir=$1
neon_bundled_builddir=$2
NEON_COMMON_BUNDLED([$3], [$4])

])

AC_DEFUN([NEON_COMMON_BUNDLED],[

AC_PREREQ(2.50)

AC_ARG_WITH(included-neon,
AC_HELP_STRING([--with-included-neon], [force use of included neon library]),
[neon_force_included="$withval"], [neon_force_included="no"])

NEON_COMMON

# The colons are here so there is something to evaluate
# in case the argument was not passed.
if test "$neon_force_included" = "yes"; then
	:
	$1
else
	:
	$2
fi

])

dnl Not got any bundled sources:
AC_DEFUN([NEON_LIBRARY],[

AC_PREREQ(2.50)
neon_force_included=no
neon_bundled_srcdir=
neon_bundled_builddir=

NEON_COMMON

])

AC_DEFUN([NEON_VERSIONS], [

# Define the current versions.
NEON_VERSION_MAJOR=0
NEON_VERSION_MINOR=24
NEON_VERSION_RELEASE=7
NEON_VERSION_TAG=

NEON_VERSION="${NEON_VERSION_MAJOR}.${NEON_VERSION_MINOR}.${NEON_VERSION_RELEASE}${NEON_VERSION_TAG}"

# libtool library interface versioning.  Release policy dictates that
# for neon 0.x.y, each x brings an incompatible interface change, and
# each y brings no interface change, and since this policy has been
# followed since 0.1, x == CURRENT, y == RELEASE, 0 == AGE.  For
# 1.x.y, this will become N + x == CURRENT, y == RELEASE, x == AGE,
# where N is constant (and equal to CURRENT + 1 from the final 0.x
# release)
NEON_INTERFACE_VERSION="${NEON_VERSION_MINOR}:${NEON_VERSION_RELEASE}:0"

AC_DEFINE_UNQUOTED(NEON_VERSION, "${NEON_VERSION}", 
	[Define to be the neon version string])
AC_DEFINE_UNQUOTED(NEON_VERSION_MAJOR, [(${NEON_VERSION_MAJOR})],
	[Define to be major number of neon version])
AC_DEFINE_UNQUOTED(NEON_VERSION_MINOR, [(${NEON_VERSION_MINOR})],
	[Define to be minor number of neon version])

])

dnl Define the minimum required version
AC_DEFUN([NEON_REQUIRE], [
neon_require_major=$1
neon_require_minor=$2
])

dnl Check that the external library found in a given location
dnl matches the min. required version (if any).  Requires that
dnl NEON_CONFIG be set the the full path of a valid neon-config
dnl script
dnl
dnl Usage:
dnl    NEON_CHECK_VERSION(ACTIONS-IF-OKAY, ACTIONS-IF-FAILURE)
dnl
AC_DEFUN([NEON_CHECK_VERSION], [
if test "x$neon_require_major" = "x"; then
    # Nothing to check.
    ne_goodver=yes
    ne_libver="(version unknown)"
else
    # Check whether the library is of required version
    ne_save_LIBS="$LIBS"
    ne_save_CFLAGS="$CFLAGS"
    CFLAGS="$CFLAGS `$NEON_CONFIG --cflags`"
    LIBS="$LIBS `$NEON_CONFIG --libs`"
    ne_libver=`$NEON_CONFIG --version | sed -e "s/neon //g"`
    # Check whether it's possible to link against neon
    AC_CACHE_CHECK([linking against neon], [ne_cv_lib_neon],
    AC_TRY_LINK_FUNC([ne_version_match],
	[ne_cv_lib_neon=yes], [ne_cv_lib_neon=no]))
    if test "$ne_cv_lib_neon" = "yes"; then
       # Now check whether the neon library version is satisfactory
       AC_CACHE_CHECK([neon library version], [ne_cv_lib_neonver],
       AC_TRY_RUN([#include <ne_utils.h>
int main(int argc, char **argv) {
return ne_version_match($neon_require_major, $neon_require_minor);
}], ne_cv_lib_neonver=yes, ne_cv_lib_neonver=no))
    fi
    ne_goodver=$ne_cv_lib_neonver
    LIBS=$ne_save_LIBS
    CFLAGS=$ne_save_CFLAGS
fi
if test "$ne_goodver" = "yes"; then
    AC_MSG_NOTICE([using neon library $ne_libver])
    $1
else
    AC_MSG_NOTICE([incompatible neon library version $ne_libver: wanted $neon_require_major.$neon_require_minor])
    $2
fi])

dnl NEON_CHECK_SUPPORT(feature, var)
AC_DEFUN([NEON_CHECK_SUPPORT], [
if $NEON_CONFIG --support $1 >/dev/null; then
   neon_$1_message="supported by neon"
   $2=yes
else
   neon_$1_message="not supported by neon"
   $2=no
fi
])

AC_DEFUN([NEON_USE_EXTERNAL], [
# Configure to use an external neon, given a neon-config script
# found at $NEON_CONFIG.
neon_prefix=`$NEON_CONFIG --prefix`
NEON_CHECK_VERSION([
    CFLAGS="$CFLAGS `$NEON_CONFIG --cflags`"
    NEON_LIBS="$NEON_LIBS `$NEON_CONFIG --libs`"
    neon_library_message="library in ${neon_prefix} (`$NEON_CONFIG --version`)"
    neon_xml_parser_message="using whatever neon uses"
    NEON_CHECK_SUPPORT([ssl], [NEON_SUPPORTS_SSL])
    NEON_CHECK_SUPPORT([zlib], [NEON_SUPPORTS_ZLIB])
    neon_got_library=yes
], [neon_got_library=no])
])

AC_DEFUN([NEON_COMMON],[

AC_REQUIRE([NEON_COMMON_CHECKS])

NEON_VERSIONS

AC_ARG_WITH(neon,
[  --with-neon[[=DIR]]       specify location of neon library],
[case $withval in
yes|no) neon_force_external=$withval; neon_ext_path= ;;
*) neon_force_external=yes; neon_ext_path=$withval ;;
esac;], [
neon_force_external=no
neon_ext_path=
])

if test "$neon_force_included" = "no"; then
    # There is no included neon source directory, or --with-included-neon
    # wasn't given (so we're not forced to use it).

    # Default to no external neon.
    neon_got_library=no
    if test "x$neon_ext_path" = "x"; then
	AC_PATH_PROG([NEON_CONFIG], neon-config, none)
	if test "x${NEON_CONFIG}" = "xnone"; then
	    AC_MSG_NOTICE([no external neon library found])
	elif test -x "${NEON_CONFIG}"; then
	    NEON_USE_EXTERNAL
	else
	    AC_MSG_NOTICE([ignoring non-executable ${NEON_CONFIG}])
	fi
    else
	AC_MSG_CHECKING([for neon library in $neon_ext_path])
	NEON_CONFIG="$neon_ext_path/bin/neon-config"
	if test -x ${NEON_CONFIG}; then
	    AC_MSG_RESULT([found])
	    NEON_USE_EXTERNAL
	else
	    AC_MSG_RESULT([not found])
	    # ...will fail since force_external=yes
	fi
    fi

    if test "$neon_got_library" = "no"; then 
	if test $neon_force_external = yes; then
	    AC_MSG_ERROR([could not use external neon library])
	elif test -n "$neon_bundled_srcdir"; then
	    # Couldn't find external neon, forced to use bundled sources
	    neon_force_included="yes"
	else
	    # Couldn't find neon, and don't have bundled sources
	    AC_MSG_ERROR(could not find neon)
	fi
    fi
fi

# This isn't a simple 'else' branch, since neon_force_included
# is set to yes if the search fails.

if test "$neon_force_included" = "yes"; then
    AC_MSG_NOTICE([using bundled neon ($NEON_VERSION)])
    NEON_BUILD_BUNDLED="yes"
    LIBNEON_SOURCE_CHECKS
    CFLAGS="$CFLAGS -I$neon_bundled_srcdir"
    NEON_LIBS="-L$neon_bundled_builddir -lneon $NEON_LIBS"
    NEON_NEED_XML_PARSER=yes
    neon_library_message="included libneon (${NEON_VERSION})"
else
    # Don't need to configure an XML parser
    NEON_NEED_XML_PARSER=no
    NEON_BUILD_BUNDLED="yes"
fi

AC_SUBST(NEON_BUILD_BUNDLED)

])

dnl AC_SEARCH_LIBS done differently. Usage:
dnl   NE_SEARCH_LIBS(function, libnames, [extralibs], [actions-if-not-found],
dnl                            [actions-if-found])
dnl Tries to find 'function' by linking againt `-lLIB $NEON_LIBS' for each
dnl LIB in libnames.  If link fails and 'extralibs' is given, will also
dnl try linking against `-lLIB extralibs $NEON_LIBS`.
dnl Once link succeeds, `-lLIB [extralibs]` is prepended to $NEON_LIBS, and
dnl `actions-if-found' are executed, if given.
dnl If link never succeeds, run `actions-if-not-found', if given, else
dnl give an error and fail configure.
AC_DEFUN([NE_SEARCH_LIBS], [

AC_CACHE_CHECK([for library containing $1], [ne_cv_libsfor_$1], [
AC_TRY_LINK_FUNC($1, [ne_cv_libsfor_$1="none needed"], [
ne_sl_save_LIBS=$LIBS
ne_cv_libsfor_$1="not found"
for lib in $2; do
    LIBS="$ne_sl_save_LIBS -l$lib $NEON_LIBS"
    AC_TRY_LINK_FUNC($1, [ne_cv_libsfor_$1="-l$lib"; break])
    m4_if($3, [], [], dnl If $3 is specified, then...
              [LIBS="$ne_sl_save_LIBS -l$lib $3 $NEON_LIBS"
               AC_TRY_LINK_FUNC($1, [ne_cv_libsfor_$1="-l$lib $3"; break])])
done
LIBS=$ne_sl_save_LIBS])])

if test "$ne_cv_libsfor_$1" = "not found"; then
   m4_if($4, [], [AC_MSG_ERROR([could not find library containing $1])], [$4])
elif test "$ne_cv_libsfor_$1" != "none needed"; then 
   NEON_LIBS="$ne_cv_libsfor_$1 $NEON_LIBS"
   $5
fi])

dnl Check for presence and suitability of zlib library
AC_DEFUN([NEON_ZLIB], [

AC_ARG_WITH(zlib, AC_HELP_STRING([--without-zlib], [disable zlib support]),
ne_use_zlib=$withval, ne_use_zlib=yes)

NEON_SUPPORTS_ZLIB=no
AC_SUBST(NEON_SUPPORTS_ZLIB)

if test "$ne_use_zlib" = "yes"; then
    AC_CHECK_HEADER(zlib.h, [
  	AC_CHECK_LIB(z, inflate, [ 
	    NEON_LIBS="$NEON_LIBS -lz"
	    NEON_CFLAGS="$NEON_CFLAGS -DNEON_ZLIB"
	    NEON_SUPPORTS_ZLIB=yes
	    neon_zlib_message="found in -lz"
	], [neon_zlib_message="zlib not found"])
    ], [neon_zlib_message="zlib not found"])
else
    neon_zlib_message="zlib disabled"
fi
])

AC_DEFUN([NE_MACOSX], [
# Check for Darwin, which needs extra cpp and linker flags.
AC_CACHE_CHECK([for Darwin], ne_cv_os_macosx, [
case `uname -s 2>/dev/null` in
Darwin) ne_cv_os_macosx=yes ;;
*) ne_cv_os_macosx=no ;;
esac])
if test $ne_cv_os_macosx = yes; then
  CPPFLAGS="$CPPFLAGS -no-cpp-precomp"
  LDFLAGS="$LDFLAGS -flat_namespace"
fi
])

AC_DEFUN([NEON_COMMON_CHECKS], [

# These checks are done whether or not the bundled neon build
# is used.

AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_PROG_CC_STDC])
AC_REQUIRE([AC_LANG_C])
AC_REQUIRE([AC_ISC_POSIX])
AC_REQUIRE([AC_C_INLINE])
AC_REQUIRE([AC_C_CONST])
AC_REQUIRE([AC_TYPE_SIZE_T])
AC_REQUIRE([AC_TYPE_OFF_T])

AC_REQUIRE([NE_MACOSX])

AC_REQUIRE([AC_PROG_MAKE_SET])

AC_REQUIRE([AC_HEADER_STDC])

AC_CHECK_HEADERS([errno.h stdarg.h string.h stdlib.h])

NEON_FORMAT(size_t,,u) dnl size_t is unsigned; use %u formats
NEON_FORMAT(off_t)
NEON_FORMAT(ssize_t)

])

AC_DEFUN([NEON_FORMAT_PREP], [
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)
if test "$GCC" = "yes"; then
  AC_CACHE_CHECK([for gcc -Wformat -Werror sanity], ne_cv_cc_werror, [
  # See whether a simple test program will compile without errors.
  ne_save_CPPFLAGS=$CPPFLAGS
  CPPFLAGS="$CPPFLAGS -Wformat -Werror"
  AC_TRY_COMPILE([#include <sys/types.h>
  #include <stdio.h>], [int i = 42; printf("%d", i);], 
  [ne_cv_cc_werror=yes], [ne_cv_cc_werror=no])
  CPPFLAGS=$ne_save_CPPFLAGS])
  ne_fmt_trycompile=$ne_cv_cc_werror
else
  ne_fmt_trycompile=no
fi
])

dnl NEON_FORMAT(TYPE[, HEADERS[, [SPECIFIER]])
dnl
dnl This macro finds out which modifier is needed to create a
dnl printf format string suitable for printing integer type TYPE (which
dnl may be an int, long, or long long).
dnl The default specifier is 'd', if SPECIFIER is not given.  
dnl TYPE may be defined in HEADERS; sys/types.h is always used first.
AC_DEFUN([NEON_FORMAT], [

AC_REQUIRE([NEON_FORMAT_PREP])

AC_CHECK_SIZEOF($1, [$2])

dnl Work out which specifier character to use
m4_ifdef([ne_spec], [m4_undefine([ne_spec])])
m4_if($#, 3, [m4_define(ne_spec,$3)], [m4_define(ne_spec,d)])

AC_CACHE_CHECK([how to print $1], [ne_cv_fmt_$1], [
ne_cv_fmt_$1=none
if test $ne_fmt_trycompile = yes; then
  oflags="$CPPFLAGS"
  # Consider format string mismatches as errors
  CPPFLAGS="$CPPFLAGS -Wformat -Werror"
  dnl obscured for m4 quoting: "for str in d ld qd; do"
  for str in ne_spec l]ne_spec[ q]ne_spec[; do
    AC_TRY_COMPILE([#include <sys/types.h>
$2
#include <stdio.h>], [$1 i = 1; printf("%$str", i);], 
	[ne_cv_fmt_$1=$str; break])
  done
  CPPFLAGS=$oflags
else
  # Best guess. Don't have to be too precise since we probably won't
  # get a warning message anyway.
  case $ac_cv_sizeof_$1 in
  $ac_cv_sizeof_int) ne_cv_fmt_$1="ne_spec" ;;
  $ac_cv_sizeof_long) ne_cv_fmt_$1="l]ne_spec[" ;;