On Aug 24 00:19, Hans-Bernhard Bröker wrote: > Hello everyone, > > building the git version of cygwin natively on Cygwin-2.5.3, I'm running > into a problem with strtoul_l / strtol_l. winsup/cygwin/libc/strptime.cc > fails to build: > [...] > > Looking at the .ii file, it appears __GNU_VISIBLE is not active for this C++ > source file?
Yes, we discussed this already yesterday on the Freenode #cygwin-developers IRC channel. The reason is that sys/cdefs.h is included before winsup.h is included, the latter defining _GNU_SOURCE. However, it appears that I don't see this problem when cross building on Linux. It only shows up in a native build. After some digging it turned out that in the cross build case _GNU_SOURCE is predefined when using the -xc++ option: Native: $ x86_64-pc-cygwin-c++ -xc++ -dM -E - < /dev/null | grep GNU_SOURCE [no output] Linux: $ x86_64-pc-cygwin-c++ -xc++ -dM -E - < /dev/null | grep GNU_SOURCE #define _GNU_SOURCE 1 That's pretty weird since _GNU_SOURCE is not supposed to be defined by the compiler or C preprocessor at all. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat
signature.asc
Description: PGP signature
