Fixed build on Linux with x32 ABI.
On Linux x32 inclusion of sys/sysctl.h produces an error. As sysctl() is
only used by rtsig event method code, which is legacy and not compiled
in by default on modern linuxes, the sys/sysctl.h file now only included
if rtsig support is enabled.
Based on patch by Serguei I. Ivantsov.
diff --git a/src/os/unix/ngx_linux_config.h b/src/os/unix/ngx_linux_config.h
index 2834032..8467a97 100644
--- a/src/os/unix/ngx_linux_config.h
+++ b/src/os/unix/ngx_linux_config.h
@@ -51,7 +51,6 @@
#include <malloc.h> /* memalign() */
#include <limits.h> /* IOV_MAX */
#include <sys/ioctl.h>
-#include <sys/sysctl.h>
#include <crypt.h>
#include <sys/utsname.h> /* uname() */
@@ -77,11 +76,17 @@
#endif
-#if (NGX_HAVE_POLL || NGX_HAVE_RTSIG)
+#if (NGX_HAVE_POLL)
#include <poll.h>
#endif
+#if (NGX_HAVE_RTSIG)
+#include <poll.h>
+#include <sys/sysctl.h>
+#endif
+
+
#if (NGX_HAVE_EPOLL)
#include <sys/epoll.h>
#endif
