Depends-on:
math
-log [test $HAVE_LOGF = 0]
+extensions
+log [test $HAVE_LOGF = 0 || test $REPLACE_LOGF = 1]
configure.ac:
gl_FUNC_LOGF
-if test $HAVE_LOGF = 0; then
+if test $HAVE_LOGF = 0 || test $REPLACE_LOGF = 1; then
AC_LIBOBJ([logf])
fi
gl_MATH_MODULE_INDICATOR([logf])