------- Comment #2 from janis at gcc dot gnu dot org 2009-01-30 00:25 ------- Andrew is correct, math.h is not provided by GCC.
TR 24732 is not supported by GLIBC and probably won't be until it is incorporated into a C standard. Meanwhile it is in a branch of the EGLIBC project, but I understand that it is difficult to build so I'm not sure how you could use it for testing. To avoid "warning: ISO C does not support decimal floating point" compile with -std=gnu99. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39031
