Hi, I filed the bug (https://llvm.org/bugs/show_bug.cgi?id=26283) some time ago and nobody picked it up, so here is a trivial patch exposing the missing macros, that to the best of my ability were already present as the internal underscored versions.
Perhaps a more general bug about C11 floating point (lack of) conformance should be filed, so that some form of unit test/macro validation could be worked on, but this patch does scratch my current itch. Successfully tested on x86-64 Xubuntu 14.04 with clang 3.8 from the ppa, patched with the attached diff. First contribution, so feel free to suggest improvements or point to more detailed step-by-step instructions/guidelines. Cheers, JT
Index: lib/Headers/float.h =================================================================== --- lib/Headers/float.h (revision 260194) +++ lib/Headers/float.h (working copy) @@ -68,6 +68,9 @@ # undef FLT_TRUE_MIN # undef DBL_TRUE_MIN # undef LDBL_TRUE_MIN +# undef FLT_DECIMAL_DIG +# undef DBL_DECIMAL_DIG +# undef LDBL_DECIMAL_DIG # endif #endif @@ -119,6 +122,9 @@ # define FLT_TRUE_MIN __FLT_DENORM_MIN__ # define DBL_TRUE_MIN __DBL_DENORM_MIN__ # define LDBL_TRUE_MIN __LDBL_DENORM_MIN__ +# define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__ +# define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__ +# define LDBL_DECIMAL_DIG __DECIMAL_DIG__ #endif #endif /* __FLOAT_H */
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