With C command line option -std=gnu99 double floating-point constants with either 'd' or 'D' suffix are not accepted by gcc 4.3.2-7 running on Intel x86/x87 Pentium 4 running Fedora Core 10 Linux Part of gcc -v is: gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC)
#define __STDC_WANT_DEC_FP__ /* Tell implementation that we want Decimal FP */ double d1 = 1.0d; /* binary double (yes) versus decimal double (no) */ double d2 = 2.0D; gets error: invalid suffix "d" on floating constant error: invalid suffix "D" on floating constant -- Summary: double floating point suffix of 'd' and 'D' not accepted Product: gcc Version: 4.3.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: tydeman at tybor dot com GCC host triplet: 4.3.2 GCC target triplet: 4.3.2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39027