On 2/7/2011 1:41 PM, Angelo Graziosi wrote: > Current trunk, rev. 169888, fails to bootstrap on Cygwin with this error: > > [...] > /tmp/gcc-4.6-r169888/libgcc/config/libbid/bid_decimal_globals.c:47:18: > fatal error: fenv.h: No such file or directory > compilation terminated. > make[2]: *** [bid_decimal_globals.o] Error 1 > make[2]: *** Waiting for unfinished jobs.... > make[2]: Leaving directory > `/tmp/gcc-4.6-r169888/Work/i686-pc-cygwin/libgcc' > make[1]: *** [all-target-libgcc] Error 2 > make[1]: Leaving directory `/tmp/gcc-4.6-r169888/Work' > make: *** [all] Error 2
This was a deliberate choice: e.g. to require a development version of cygwin in order to bootstrap the 4.6 branch. Rationale: fenv.h support will be present in cygwin 1.7.8 which is due out any day now, and we didn't want to wait 6-8 months for the gcc-4.7 cycle in order to support decimal-floating-point stuff in cygwin/gcc. You can install one of the more recent cygwin snapshots, and the build should then work. -- Chuck
