+cf_save_LIBS="$LIBS"
+
+AC_TRY_LINK([$1],[$2],[
+ cf_cv_find_linkage_$3=yes
+ cf_cv_header_path_$3=/usr/include
+ cf_cv_library_path_$3=/usr/lib
+],[
+
+LIBS="-l$3 $7 $cf_save_LIBS"
+
+AC_TRY_LINK([$1],[$2],[
+ cf_cv_find_linkage_$3=yes
+ cf_cv_header_path_$3=/usr/include
+ cf_cv_library_path_$3=/usr/lib
+ cf_cv_library_file_$3="-l$3"
+],[
+ cf_cv_find_linkage_$3=no
+ LIBS="$cf_save_LIBS"
+
+ CF_VERBOSE(find linkage for $3 library)
+ CF_MSG_LOG([Searching for headers in [FIND_LINKAGE]($3,$6)])
+
+ cf_save_CPPFLAGS="$CPPFLAGS"
+ cf_test_CPPFLAGS="$CPPFLAGS"
+
+ CF_HEADER_PATH(cf_search,ifelse([$6],,[$3],[$6]))
+ for cf_cv_header_path_$3 in $cf_search
+ do
+ if test -d $cf_cv_header_path_$3 ; then
+ CF_VERBOSE(... testing $cf_cv_header_path_$3)
+ CPPFLAGS="$cf_save_CPPFLAGS -I$cf_cv_header_path_$3"
+ AC_TRY_COMPILE([$1],[$2],[
+ CF_VERBOSE(... found $3 headers in $cf_cv_header_path_$3)
+ cf_cv_find_linkage_$3=maybe
+ cf_test_CPPFLAGS="$CPPFLAGS"
+ break],[
+ CPPFLAGS="$cf_save_CPPFLAGS"
+ ])
+ fi
+ done
+
+ if test "$cf_cv_find_linkage_$3" = maybe ; then
+
+ CF_MSG_LOG([Searching for $3 library in [FIND_LINKAGE]($3,$6)])
+
+ cf_save_LIBS="$LIBS"
+ cf_save_LDFLAGS="$LDFLAGS"
+
+ ifelse([$6],,,[
+ CPPFLAGS="$cf_test_CPPFLAGS"
+ LIBS="-l$3 $7 $cf_save_LIBS"
+ AC_TRY_LINK([$1],[$2],[
+ CF_VERBOSE(... found $3 library in system)
+ cf_cv_find_linkage_$3=yes])
+ CPPFLAGS="$cf_save_CPPFLAGS"
+ LIBS="$cf_save_LIBS"
+ ])
+
+ if test "$cf_cv_find_linkage_$3" != yes ; then
+ CF_LIBRARY_PATH(cf_search,$3)
+ for cf_cv_library_path_$3 in $cf_search
+ do
+ if test -d $cf_cv_library_path_$3 ; then
+ CF_VERBOSE(... testing $cf_cv_library_path_$3)
+ CPPFLAGS="$cf_test_CPPFLAGS"
+ LIBS="-l$3 $7 $cf_save_LIBS"
+ LDFLAGS="$cf_save_LDFLAGS -L$cf_cv_library_path_$3"
+ AC_TRY_LINK([$1],[$2],[
+ CF_VERBOSE(... found $3 library in $cf_cv_library_path_$3)
+ cf_cv_find_linkage_$3=yes
+ cf_cv_library_file_$3="-l$3"
+ break],[
+ CPPFLAGS="$cf_save_CPPFLAGS"
+ LIBS="$cf_save_LIBS"
+ LDFLAGS="$cf_save_LDFLAGS"
+ ])
+ fi
+ done
+ CPPFLAGS="$cf_save_CPPFLAGS"
+ LDFLAGS="$cf_save_LDFLAGS"
+ fi
+
+ else
+ cf_cv_find_linkage_$3=no
+ fi
+ ],$7)
+])
+
+LIBS="$cf_save_LIBS"
+
+if test "$cf_cv_find_linkage_$3" = yes ; then
+ifelse([$4],,[
+ CF_ADD_INCDIR($cf_cv_header_path_$3)
+ CF_ADD_LIBDIR($cf_cv_library_path_$3)
+ CF_ADD_LIB($3)
+],[$4])
+else
+ifelse([$5],,AC_MSG_WARN(Cannot find $3 library),[$5])
+fi
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FIND_SUB_INCDIR version: 2 updated: 2015/04/17 21:13:04
+dnl ------------------
+dnl Find an include-directory with the given leaf-name. This is useful for
+dnl example with FreeBSD ports, which use this convention to distinguish
+dnl different versions of the same port.
+AC_DEFUN([CF_FIND_SUB_INCDIR],[
+ CF_SUBDIR_PATH(cf_search,$1,include)
+ for cf_item in $cf_search
+ do
+ case $cf_item in
+ (*/$1)
+ CF_ADD_INCDIR($cf_item)
+ ;;
+ esac
+ done
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FIND_SUB_LIBDIR version: 2 updated: 2015/04/17 21:13:04
+dnl ------------------
+dnl Find a library-directory with the given leaf-name. This is useful for
+dnl example with FreeBSD ports, which use this convention to distinguish
+dnl different versions of the same port.
+AC_DEFUN([CF_FIND_SUB_LIBDIR],[
+ CF_SUBDIR_PATH(cf_search,$1,lib)
+ for cf_item in $cf_search
+ do
+ case $cf_item in
+ (*/$1)
+ CF_ADD_LIBDIR($cf_item)
+ ;;
+ esac
+ done
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FIXUP_ADAFLAGS version: 2 updated: 2015/04/17 21:13:04
+dnl -----------------
+dnl make ADAFLAGS consistent with CFLAGS
+AC_DEFUN([CF_FIXUP_ADAFLAGS],[
+ AC_MSG_CHECKING(optimization options for ADAFLAGS)
+ case "$CFLAGS" in
+ (*-g*)
+ CF_ADD_ADAFLAGS(-g)
+ ;;
+ esac
+ case "$CFLAGS" in
+ (*-O*)
+ cf_O_flag=`echo "$CFLAGS" |sed -e 's/^.*-O/-O/' -e 's/[[ ]].*//'`
+ CF_ADD_ADAFLAGS($cf_O_flag)
+ ;;
+ esac
+ AC_MSG_RESULT($ADAFLAGS)
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FORGET_TOOL version: 1 updated: 2013/04/06 18:03:09
+dnl --------------
+dnl Forget that we saw the given tool.
+AC_DEFUN([CF_FORGET_TOOL],[
+unset ac_cv_prog_ac_ct_$1
+unset ac_ct_$1
+unset $1
+])dnl
+dnl ---------------------------------------------------------------------------
+dnl CF_FUNC_DLSYM version: 4 updated: 2015/09/12 14:46:44
+dnl -------------
+dnl Test for dlsym() and related functions, as well as libdl.
+dnl
+dnl Sets
+dnl $cf_have_dlsym
+dnl $cf_have_libdl
+AC_DEFUN([CF_FUNC_DLSYM],[
+cf_have_dlsym=no
+AC_CHECK_FUNC(dlsym,cf_have_dlsym=yes,[
+
+cf_have_libdl=no
+AC_CHECK_LIB(dl,dlsym,[
+ cf_have_dlsym=yes
+ cf_have_libdl=yes])])
+
+if test "$cf_have_dlsym" = yes ; then
+ test "$cf_have_libdl" = yes && { CF_ADD_LIB(dl) }
+
+ AC_MSG_CHECKING(whether able to link to dl*() functions)
+ AC_TRY_LINK([#include <dlfcn.h>],[
+ void *obj;
+ if ((obj = dlopen("filename", 0)) != 0) {
+ if (dlsym(obj, "symbolname") == 0) {
+ dlclose(obj);
+ }
+ }],[
+ AC_DEFINE(HAVE_LIBDL,1,[Define to 1 if we have dl library])],[
+ AC_MSG_ERROR(Cannot link test program for libdl)])
+ AC_MSG_RESULT(ok)
+else
+ AC_MSG_ERROR(Cannot find dlsym function)