[Fix] Fix build where ucontext is defined in ucontext.h

CMakeLists.txt

@@ -906,6 +906,7 @@ CHECK_INCLUDE_FILES(cpuid.h HAVE_CPUID_H)
 CHECK_INCLUDE_FILES(dirent.h HAVE_DIRENT_H)
 CHECK_INCLUDE_FILES(stropts.h HAVE_STROPS_H)
 CHECK_INCLUDE_FILES(sys/ioctl.h HAVE_SYS_IOCTL_H)
+CHECK_INCLUDE_FILES(ucontext.h HAVE_UCONTEXT_H)
 
 # Check platform API
 CHECK_FUNCTION_EXISTS(setproctitle HAVE_SETPROCTITLE)

config.h.in

@@ -119,6 +119,7 @@
 #cmakedefine HAVE_TANHL          1
 #cmakedefine HAVE_TERMIOS_H      1
 #cmakedefine HAVE_TIME_H         1
+#cmakedefine HAVE_UCONTEXT_H     1
 #cmakedefine HAVE_UNISTD_H       1
 #cmakedefine HAVE_VFORK          1
 #cmakedefine HAVE_WAIT4          1

src/libserver/worker_util.c

@@ -50,6 +50,10 @@
 #define UNWIND_BACKTRACE_DEPTH 256
 #endif
 
+#ifdef HAVE_UCONTEXT_H
+#include <ucontext.h>
+#endif
+
 static void rspamd_worker_ignore_signal (int signo);
 /**
  * Return worker's control structure by its type