Keith Marshall
keith****@users*****
Thu Aug 2 01:32:16 JST 2018
On 01/08/18 16:47, Eli Zaretskii wrote: >> From: Keith Marshall <keith****@users*****> >> Date: Tue, 31 Jul 2018 18:00:37 +0100 >> >> I just found another ... running mingwrt's C++ headers integrity test >> fails in <process.h>, because g++ now seems to provide internal >> prototypes for execv(), execve(), and execvp(), which conflict with the >> Microsoft specific declarations in <process.h>. > > Ouch! So another release of MinGW GCC will be needed to fix this? Or > is there a way to avoid the problem with some easier solution? The problem is that Microsoft changed the return type, a few years ago, from "int", (which is what the rest of the *nix world still uses), to "intptr_t". Of course, Microsoft also changed the names, (by adding their beloved/hideous leading underscore), and their current online documentation just says that the original POSIX functions are deprecated, and that one should use their "ISO C++ conformant" functions instead[*] ... and they don't even bother to show prototypes for the POSIX functions. The simplest solution would be to either[**]: - remove the offending prototypes from the OLDNAMES section of our mingwrt <process.h>, or ... - leave the OLDNAMES prototypes in place, but revert the return type to "int", (as g++ wants it, and POSIX says it should be). [*] Actually, I'd advise against using these Microsoft functions anyway; if they successfully create a child process, then the calling process terminates, without providing any mechanism for its parent to wait for, or even identify the child. [**] There's actually a third option: ignore the testsuite failure! The issue isn't even apparent, unless compiling with -Wsystem-headers, (as the testsuite does), and even then it only raises warnings, (unless -Werror is also enabled). -- Regards, Keith. Public key available from keys.gnupg.net Key fingerprint: C19E C018 1547 DE50 E1D4 8F53 C0AD 36C6 347E 5A3F -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 836 bytes Desc: OpenPGP digital signature Url : https://lists.osdn.me/mailman/archives/mingw-users/attachments/20180801/3bfd7edd/attachment.pgp
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