------- Comment #7 from pinskia at gcc dot gnu dot org 2006-08-22 00:37 ------- I should mention "We intend for a library implementor to be able to simply #define each standard macro to its built-in equivalent." is when not using -ffast-math and other options which turn off IEEE/C99 complaincy which is what exactly those options do.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28795
