Brian Dessent wrote: > Cygwin has been a secondary target for a number of years. MinGW has > been a secondary target since 4.3. This generally means that they > should be in fairly good shape, more or less. To quote the docs: > >> Our release criteria for the secondary platforms is: >> >> * The compiler bootstraps successfully, and the C++ runtime library >> builds. >> * The DejaGNU testsuite has been run, and a substantial majority of the >> tests pass. >
> > More recently I've seen Danny Smith report that the IRA merge broke > MinGW (and presumably Cygwin, since they share most of the same code) > bootstrap. I haven't tested this myself recently so I don't know if > it's still broken or not. > I've run the bootstrap and testsuite twice in the last month. The bootstrap failures are due to a broken #ifdef specific to cygwin in the headers provided with cygwin, the requirement for a specific version of autoconf (not available in setup), and the need to remove the -werror in libstdc++ build (because of minor discrepancies in cygwin headers). All of those are easy to rectify, but fixes seem unlikely to be considered by the decision makers. However, the C++ testsuite results are unacceptable, with many internal errors. For some time now, gfortran has been broken for practical purposes, even when it passes testsuite, as it seems to have a memory leak. This shows up in the public wiki binaries. So, there are clear points for investigation of cygwin problems, and submission of PRs, should you be interested. > Running the dejagnu testsuite on Cygwin is > excruciatingly slow due to the penalty incurred from emulating fork. It runs over a weekend on a Pentium D which I brought back to life by replacing the CPU cooler system. I have no problem with running this if I am in the office when the snapshot is released, but I think there is little interest in fixing the problems which are specific to g++ on cygwin, yet working gcc and gfortran aren't sufficient for gcc upgrades to be accepted. Support for 64-bit native looks like it will be limited to mingw, so I no longer see a future for gcc on cygwin.
