acinclude.m4

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     AC_PATH_LIB_ERROR
     AC_PATH_LIB_ERROR([If you have an old version installed, it is best to remove])
     AC_PATH_LIB_ERROR([it, although you may also be able to get things to work by])
     AC_PATH_LIB_ERROR([modifying LD_LIBRARY_PATH])
    ],
    [AC_PATH_LIB_ERROR([The test program failed to compile or link.  See the file])
     AC_PATH_LIB_ERROR([config.log for the exact error that occured.  This usually])
     AC_PATH_LIB_ERROR([means UP was incorrectly installed or that you have])
     AC_PATH_LIB_ERROR([moved UP since it was installed.  In the latter case,])
     AC_PATH_LIB_ERROR([you may want to edit the $LDOWN[]_config script:])
     AC_PATH_LIB_ERROR([$UP[]_CONFIG])
    ])
fi
rm -f RUNLOG
m4_popdef([RUNLOG])dnl
m4_popdef([MAJOR])dnl
m4_popdef([MINOR])dnl
m4_popdef([MICRO])dnl
m4_popdef([DEFMAJOR])dnl
m4_popdef([DEFMINOR])dnl
m4_popdef([DEFMICRO])dnl
])# _AC_PATH_LIB_CHECK_TEST_COMPILE_DEFAULT


# _AC_PATH_LIB_CHECK_VERSION_DEFAULT
# ----------------------------------
# Check that the library version (config) is greater than or equal to
# the requested (minimum) version.
AC_DEFUN([_AC_PATH_LIB_CHECK_VERSION],
[m4_if([$2], , ,
       [if test x$LDOWN[]_present_avoidcache = xyes ; then
         if test \
             "$LDOWN[]_config_major_version" -lt "$LDOWN[]_min_major_version" -o \
             "$LDOWN[]_config_major_version" -eq "$LDOWN[]_min_major_version" -a \
             "$LDOWN[]_config_minor_version" -lt "$LDOWN[]_min_minor_version" -o \
             "$LDOWN[]_config_major_version" -eq "$LDOWN[]_min_major_version" -a \
             "$LDOWN[]_config_minor_version" -eq "$LDOWN[]_min_minor_version" -a \
             "$LDOWN[]_config_micro_version" -lt "$LDOWN[]_min_micro_version" ; then
           CACHE[]_present="no"
           LDOWN[]_version_test_error="yes"
           AC_PATH_LIB_ERROR([$UP[]_CONFIG --version' returned $LDOWN[]_config_major_version.$LDOWN[]_config_minor_version.$LDOWN[]_config_micro_version, but])
           AC_PATH_LIB_ERROR([UP (>= $LDOWN[]_min_version) was needed.])
           AC_PATH_LIB_ERROR
           AC_PATH_LIB_ERROR([If $]LDOWN[_config was wrong, set the environment])
           AC_PATH_LIB_ERROR([variable ]UP[_CONFIG to point to the correct copy of])
           AC_PATH_LIB_ERROR([$]LDOWN[_config, and remove the file config.cache])
           AC_PATH_LIB_ERROR([before re-running configure.])
         else
           CACHE[]_present="yes"
         fi
       fi])
])# _AC_PATH_LIB_CHECK_VERSION_DEFAULT


# _AC_PATH_LIB_CHECK_LINK_DEFAULT(SUCCESS, FAIL)
# ----------------------------------------------
# Check if the library will link successfully.  If specified, run
# SUCCESS or FAIL on success or failure
AC_DEFUN([_AC_PATH_LIB_CHECK_LINK],
[ac_save_CFLAGS="$CFLAGS"
ac_save_LIBS="$LIBS"
CFLAGS="$CFLAGS $UP[]_CFLAGS"
LIBS="$LIBS $UP[]_LIBS"
AC_TRY_LINK([ #include <stdio.h> ], ,
            [m4_if([$1], , :, [$1])],
            [m4_if([$2], , :, [$2])])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
])# _AC_PATH_LIB_CHECK_LINK_DEFAULT




## ------------------- ##
## 4. Error reporting. ##
## ------------------- ##


# AC_PATH_LIB_ERROR(MESSAGE)
# --------------------------
# Print an error message, MESSAGE, to the error log.
AC_DEFUN([AC_PATH_LIB_ERROR],
[echo '*** m4_if([$1], , , [$1])' >>ERRORLOG])


# _AC_PATH_LIB_ERROR_DUMP
# -----------------------
# Print the error log (after main AC_CACHE_CHECK completes).
AC_DEFUN([_AC_PATH_LIB_ERROR_DUMP],
[if test -f ERRORLOG ; then
  cat ERRORLOG
  rm -f ERRORLOG
fi])




## ------------------ ##
## 5. Feature macros. ##
## ------------------ ##


# AC_PATH_LIB_PKGCONFIG
# ---------------------
# Enable pkgconfig support in libconfig script (default).
AC_DEFUN([AC_PATH_LIB_PKGCONFIG],
[m4_define([AC_PATH_LIB_USEPKGCONFIG], [true])
])dnl


# AC_PATH_LIB_LIBCONFIG
# ---------------------
# Disable pkgconfig support in libconfig script.
AC_DEFUN([AC_PATH_LIB_LIBCONFIG],
[m4_define([AC_PATH_LIB_USEPKGCONFIG], [false])
])dnl


# AC_PATH_LIB_REGISTER (MACRO, REPLACEMENT)
# -----------------------------------------
# Register a macro to replace the default checks.  Use the REPLACEMENT
# macro for the check macro MACRO.
#
# Possible MACROs are:
#   _AC_PATH_LIB_CHECK_COMPILE and
#   _AC_PATH_LIB_CHECK_VERSION
# You should make sure that replacement macros use the same arguments
# (if any), and do error logging in the same manner and behave in the
# same way as the original.

# Non-default header names may be specified, as well as version
# variable names in the library itself (needed for
# _AC_PATH_LIB_CHECK_COMPILE):
#   _AC_PATH_LIB_HEADER
#   _AC_PATH_LIB_VERSION_PREFIX (default library_)
#   _AC_PATH_LIB_VERSION_MAJOR (default major)
#   _AC_PATH_LIB_VERSION_MINOR (default minor)
#   _AC_PATH_LIB_VERSION_MICRO (default micro)
#   _AC_PATH_LIB_VERSION_SUFFIX (default _version)
#   _AC_PATH_LIB_DEFVERSION_PREFIX (default LIBRARY_)
#   _AC_PATH_LIB_DEFVERSION_MAJOR (default MAJOR)
#   _AC_PATH_LIB_DEFVERSION_MINOR (default MINOR)
#   _AC_PATH_LIB_DEFVERSION_MICRO (default MICRO)
#   _AC_PATH_LIB_DEFVERSION_SUFFIX (default _VERSION)
# For example, library_major_version.
AC_DEFUN([AC_PATH_LIB_REGISTER],
[m4_define([$1], [$2])])


# AC_PATH_LIB_CHECK_REGISTER_DEFAULTS
# -----------------------------------
# Restore the default check macros.
AC_DEFUN([AC_PATH_LIB_CHECK_REGISTER_DEFAULTS],
[_AC_PATH_LIB_CHECK_REGISTER_DEFAULTS([_AC_PATH_LIB_CHECK_COMPILE],
                                       [_AC_PATH_LIB_CHECK_VERSION],
                                       [_AC_PATH_LIB_HEADER],
                                       [_AC_PATH_LIB_VERSION_PREFIX],
                                       [_AC_PATH_LIB_VERSION_MAJOR],
                                       [_AC_PATH_LIB_VERSION_MINOR],
                                       [_AC_PATH_LIB_VERSION_MICRO],
                                       [_AC_PATH_LIB_VERSION_SUFFIX],
                                       [_AC_PATH_LIB_DEFVERSION_PREFIX],
                                       [_AC_PATH_LIB_DEFVERSION_MAJOR],
                                       [_AC_PATH_LIB_DEFVERSION_MINOR],
                                       [_AC_PATH_LIB_DEFVERSION_MICRO],
                                       [_AC_PATH_LIB_DEFVERSION_SUFFIX])
])# AC_PATH_LIB_CHECK_REGISTER_DEFAULTS


# _AC_PATH_LIB_CHECK_REGISTER_DEFAULTS(MACROs ...)
# ------------------------------------------------
# Undefine MACROs.
AC_DEFUN([AC_PATH_LIB_CHECK_REGISTER_DEFAULTS],
[m4_if([$1], , ,
       [m4_ifdef([$1],
                 [m4_undefine([$1])])
        AC_PATH_LIB_CHECK_REGISTER_DEFAULTS(m4_shift($@))
       ])
])






dnl *************************************************************************
dnl AX_CONFIG_PREFIXED_HEADER and AX_PREFIXED_DEFINE
dnl
dnl @synopsis AX_CONFIG_PREFIXED_HEADER(OUTPUT, PREFIX, INPUT)
dnl @synopsis AX_PREFIXED_DEFINE(PREFIX, SYMBOL)
dnl
dnl This pair of macros is used to create an installable version of a
dnl configure-generated config file (such as the usual 'config.h', which
dnl itself should never be installed by a package).
dnl
dnl The classic example is the creation of a "mypkg-config.h" file
dnl which will be installed along with mypkg's other header files.
dnl Your configure.ac should contain:
dnl
dnl    AC_CONFIG_HEADERS([config.h])
dnl    ...
dnl    AX_CONFIG_PREFIXED_HEADER([mypkg-config.h], [MYPKG], [config.h])
dnl
dnl This declares that 'mypkg-config.h' will be generated at the end of
dnl config.status from 'config.h' by prefixing the desired symbols with
dnl "MYPKG_".  To schedule symbols for inclusion in 'mypkg-config.h',
dnl you would add the following to configure.ac:
dnl
dnl    AX_PREFIXED_DEFINE([MYPKG], [HAVE_FEATURE_Q])
dnl    ...
dnl    AX_PREFIXED_DEFINE([MYPKG], [HAVE_ALLOCA_H])
dnl    ...
dnl    AX_PREFIXED_DEFINE([MYPKG], [SPECIAL_PRINTING_STRING])
dnl        etc.
dnl
dnl Each instance of AX_PREFIXED_DEFINE() should correspond to an instance
dnl of the usual AC_DEFINE(); the AX_PREFIXED_DEFINE() merely declares that
dnl the DEFINE'd symbol should be prefixed with "MYPKG_" and added to the
dnl 'mypkg-config.h' output file.  
dnl
dnl AX_CONFIG_PREFIXED_HEADER will only transfer over "#define SYMBOL ..."
dnl and "/* #undef SYMBOL ... */" declarations.  It will also attempt to
dnl transfer an immediately preceding (no intervening blank lines) C-style
dnl comment block.
dnl
dnl The mutual ordering of AC_CONFIG_PREFIXED_HEADER, AC_CONFIG_HEADERS,
dnl AX_PREFIXED_DEFINE, and AC_DEFINE is unimportant.  All the real work
dnl is done at AC_OUTPUT and during execution of config.status.
dnl
dnl @version v1.0 (last modified: 2004-08-08)
dnl @author Matthew Marjanovic <[e-mail]>
dnl
dnl *************************************************************************
AC_DEFUN([AX_CONFIG_PREFIXED_HEADER],[dnl
AC_CONFIG_COMMANDS([$1],[dnl
AS_VAR_PUSHDEF([_OUT],[ax_config_prefixed_OUT])dnl
AS_VAR_PUSHDEF([_PFX],[ax_config_prefixed_PFX])dnl
AS_VAR_PUSHDEF([_INP],[ax_config_prefixed_INP])dnl
AS_VAR_PUSHDEF([_DFN],[ax_config_prefixed_DFN])dnl
AS_VAR_PUSHDEF([_TMP],[ax_config_prefixed_TMP])dnl
AS_VAR_PUSHDEF([_SCRIPT],[ax_config_prefixed_SCRIPT])dnl
_OUT="$1"
_PFX=AS_TR_CPP([$2])
_INP=`echo "$3" | sed -e 's/ *//'`
_DFN=AS_TR_CPP([_$_OUT])
_TMP="$tmp/$_OUT"
_SCRIPT="$tmp/${_OUT}.sed"
if test -z "$_PFX" ; then
   AC_MSG_ERROR([missing prefix in [$0]])
else
  if test ! -f "$_INP" ; then 
    if test -f "$srcdir/$_INP" ; then
       _INP="$srcdir/$_INP"
    fi
  fi
  AC_MSG_NOTICE([creating $_OUT (prefix $_PFX for $_INP)])
  if test ! -f $_INP ; then
    AC_MSG_ERROR([input file $_INP does not exist])
  else
    # Create the transformation script
    cat <<_EOF >$_SCRIPT
@%:@ look for requested keywords and prefix them
m4_ifdef([_AX_PREFIXED_DEFINE_VARS($2)],
         [AC_FOREACH([AC_Var], m4_defn([_AX_PREFIXED_DEFINE_VARS($2)]),
[s/@%:@\\( *\\)\\(def[]ine\\|undef\\)  *\\(AC_Var\\)\\(.*\\)/@%:@\\1\\2 ${_PFX}_\\3 \\4/
])])dnl
@%:@ successful?  then go print
tPrint
@%:@ else, try to collect a comment
\\,/\\*, bCommentBegin
@%:@ else, clear comment if a blank li[]ne is encountered
/ */ h
d
@%:@ Comments:  collect lines in hold buffer until end marker found.
:CommentBegin
\\,\\*/, bCommentEnd
N; bCommentBegin
:CommentEnd
h; d
@%:@ append pattern/nl to hold buffer, remove any blank, print, clear hold.
:Print
s/\\(.*\\)/\\1\\n/
H; x; s/^\\n//; p
s/.*//; x; d
_EOF
    # Run _INP through _SCRIPT to create _TMP
    cat <<_EOF >$_TMP
/*
   $_OUT
   This is an architecture-specific fi[]le which was generated
   automatically by configure.

   Do not edit it manually.
*/

@%:@ifndef $_DFN
@%:@def[]ine $_DFN

_EOF
    sed -nf $_SCRIPT $_INP >>$_TMP
    cat <<_EOF >>$_TMP

@%:@endif /* $_DFN */
_EOF
    # Check if new output is different from existing...
    # ...move to destination if so.
    if cmp -s $_OUT $_TMP 2>/dev/null; then
      AC_MSG_NOTICE([$_OUT is unchanged])
    else
      ac_dir=`AS_DIRNAME(["$_OUT"])`
      AS_MKDIR_P(["$ac_dir"])
      rm -f "$_OUT"
      mv "$_TMP" "$_OUT"
    fi
  fi
fi
AS_VAR_POPDEF([_SCRIPT])dnl
AS_VAR_POPDEF([_TMP])dnl
AS_VAR_POPDEF([_DFN])dnl
AS_VAR_POPDEF([_INP])dnl
AS_VAR_POPDEF([_PFX])dnl
AS_VAR_POPDEF([_OUT])dnl
],[PACKAGE_TARNAME="$PACKAGE_TARNAME"])])# AX_CONFIG_PREFIXED_HEADER

AC_DEFUN([AX_PREFIXED_DEFINE],
[m4_append_uniq([_AX_PREFIXED_DEFINE_VARS($1)], [$2], [ ])dnl
])# AX_PREFIXED_DEFINE