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dnl SEARCH_FOR_LIB(LIB, FUNCTIONS, FUNCTION,
dnl [ACTION-IF-NOT-FOUND])
AC_DEFUN([SEARCH_FOR_LIB],
[
AS_VAR_PUSHDEF([with_lib], [with_lib$1])
AS_VAR_PUSHDEF([ac_header], [ac_cv_header_$3])
AS_VAR_PUSHDEF([have_lib], [ac_cv_have_$1])
AS_VAR_PUSHDEF([libs_var], AS_TR_CPP([$1_LIBS]))
AS_VAR_PUSHDEF([cppflags_var], AS_TR_CPP([$1_CPPFLAGS]))
AS_LITERAL_IF([$1],
[AS_VAR_PUSHDEF([ac_lib], [ac_cv_lib_$1_$2])],
[AS_VAR_PUSHDEF([ac_lib], [ac_cv_lib_$1''_$2])])
AC_ARG_WITH([lib$1],
[AS_HELP_STRING([--with-lib$1@<:@=DIR@:>@],
[Use lib$1 in DIR])],
[ AS_VAR_SET([with_lib], [$withval]) ],
[ AS_VAR_SET([with_lib], [yes]) ])
AS_IF([test AS_VAR_GET([with_lib]) = yes],[
AC_CHECK_HEADERS([$3])
AS_IF([test AS_VAR_GET([ac_header]) = no],
AC_MSG_WARN([Couldn't find $3. Try installing lib$3 development packages])
[$4])
my_save_LIBS="$LIBS"
LIBS=""
AC_CHECK_LIB($1, $2)
AS_VAR_SET([libs_var],[${LIBS}])
LIBS="${my_save_LIBS}"
AS_VAR_SET([cppflags_var],[""])
AS_IF([test AS_VAR_GET([ac_header]) = "$3" -a AS_VAR_GET([ac_lib]) = yes],
[AS_VAR_SET([have_lib],[yes])],
[AS_VAR_SET([have_lib],[no])
[$4]])
],[
AC_MSG_CHECKING(for $1 in $withval)
if test -f $withval/$3 -a -f $withval/lib$1.a
then
owd=`pwd`
if cd $withval; then withval=`pwd`; cd $owd; fi
AS_VAR_SET([cppflags_var],[-I$withval])
AS_VAR_SET([libs_var],[-L$withval -l$1])
AS_VAR_SET([have_lib],[yes])
elif test -f $withval/include/$3 -a -f $withval/lib/lib$1.a; then
owd=`pwd`
if cd $withval; then withval=`pwd`; cd $owd; fi
AS_VAR_SET([cppflags_var],[-I$withval/include])
AS_VAR_SET([libs_var],[-L$withval/lib -l$1])
AS_VAR_SET([have_lib],[yes])
else
AC_MSG_WARN([$3 or lib$1.a not found in $withval])
AS_VAR_SET([have_lib],[no])
[$4]
fi
])
AC_SUBST(libs_var)
AC_SUBST(cppflags_var)
AM_CONDITIONAL(AS_TR_CPP(HAVE_$1),[test AS_VAR_GET([have_lib]) = yes])
AS_VAR_POPDEF([with_lib])
AS_VAR_POPDEF([ac_header])
AS_VAR_POPDEF([libs_var])
AS_VAR_POPDEF([cppflags_var])
AS_VAR_POPDEF([have_lib])
AS_VAR_POPDEF([ac_lib])
])
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