nginx needs porting

[Dirk Mueller]

nginx hardcodes SYS_eventfd, which does not exist on aarch64. The code is a bit weird, and I have little experience with eventfd, so I'm not sure if the patch below is even remotely accurate, but it passes the build test at least:

--- auto/unix
+++ auto/unix
@@ -393,10 +393,10 @@
         ngx_feature_name="NGX_HAVE_FILE_AIO"
         ngx_feature_run=no
         ngx_feature_incs="#include <linux/aio_abi.h>
- #include <sys/syscall.h>"
+ #include <sys/eventfd.h>"
         ngx_feature_path=
         ngx_feature_libs=
- ngx_feature_test="int n = SYS_eventfd;
+ ngx_feature_test="int n = eventfd(0, 0);
                           struct iocb iocb;
                           iocb.aio_lio_opcode = IOCB_CMD_PREAD;
                           iocb.aio_flags = IOCB_FLAG_RESFD;
--- src/event/modules/ngx_epoll_module.c
+++ src/event/modules/ngx_epoll_module.c
@@ -73,7 +73,7 @@
 #define SYS_io_setup 245
 #define SYS_io_destroy 246
 #define SYS_io_getevents 247
-#define SYS_eventfd 323
+#include <sys/eventfd.h>

 typedef u_int aio_context_t;

@@ -225,7 +225,7 @@
     int n;
     struct epoll_event ee;

- ngx_eventfd = syscall(SYS_eventfd, 0);
+ ngx_eventfd = eventfd(0, 0);

     if (ngx_eventfd == -1) {
         ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,

the other SYS_io_* syscall numbers probably also need some porting.

[Riku Voipio (riku-voipio)]

Seems to build fine without this patch - how important is eventfd support in nginx?