在 MinGW/MSYS2 上编译 XZ Utils 时的类型未知

Question

我一直在尝试使用 MinGW-w64 编译 XZ Utils，当尝试在./configure之后运行make ，我收到sigset_t未知的错误。

XZ Utils 版本是 5.2.3，我的 MinGW-w64 是x86_64-7.2.0-posix-seh-rt_v5-rv1 。

In file included from common/common.h:17:0,
                 from common/common.c:13:
../../src/common/mythread.h:138:33: error: unknown type name 'sigset_t'
 mythread_sigmask(int how, const sigset_t *restrict set,
                                 ^~~~~~~~
../../src/common/mythread.h:139:3: error: unknown type name 'sigset_t'; did you mean '_sigset_t'?
   sigset_t *restrict oset)
   ^~~~~~~~
   _sigset_t
../../src/common/mythread.h: In function 'mythread_create':
../../src/common/mythread.h:158:2: error: unknown type name 'sigset_t'; did you mean '_sigset_t'?
  sigset_t old;
  ^~~~~~~~
  _sigset_t
../../src/common/mythread.h:159:2: error: unknown type name 'sigset_t'; did you mean '_sigset_t'?
  sigset_t all;
  ^~~~~~~~
  _sigset_t
../../src/common/mythread.h:160:2: warning: implicit declaration of function 'sigfillset' [-Wimplicit-function-declaration]
  sigfillset(&all);
  ^~~~~~~~~~
../../src/common/mythread.h:162:2: warning: implicit declaration of function 'mythread_sigmask'; did you mean 'pthread_sigmask'? [-Wimplicit-function-declaration]
  mythread_sigmask(SIG_SETMASK, &all, &old);
  ^~~~~~~~~~~~~~~~
  pthread_sigmask

我使用gcc -E - <<< "#include <signal.h>" | grep sigset_t检查了signal.h的sigset_t gcc -E - <<< "#include <signal.h>" | grep sigset_t并没有发现任何东西。 现在我一直在想这是否是 MinGW 的限制，如果是，是否有办法解决它。

Answer 1

https://github.com/Alexpux/mingw-w64/blob/master/mingw-w64-headers/crt/sys/types.h#L110

#ifdef _POSIX
typedef _sigset_t   sigset_t;
#endif

似乎只有在定义了 _POSIX 时才会定义。 它也在 sys/types.h 与 signal.h 中...