On 10/15/2018 9:20 PM, Murray Christopherson wrote: > I'm not certain this is a problem with Cygwin, but I am unable to find any > issue by looking over the project in question, so I thought I'd ask. Is > this an obvious bug, either in Cygwin or the project itself? > [...] > # Observed result > Fails to install. Particularly, the error output makes multiple mentions of > `undefined reference to `alloca'` during linking (full error log at > https://github.com/theacodes/cmarkgfm/issues/13). > > # Notes > As far as I can tell, `alloca` is a standard Unix function (though > deprecated). Also, in Cygwin, `/usr/includes/alloca/h` exists, suggesting > the function _should_ exist to be linked without further packages?
alloca is defined in /usr/include/alloca.h as a macro expanding to __builtin_alloca. The linking error you report suggests that there's a missing "#include <alloca.h>" in the source code that's being compiled. This is also confirmed by the gcc warnings in your full log. Ken
