lighttpd: add clock_gettime patch

Fixes:
http://autobuild.buildroot.net/results/590/5901153a345c69d0a041309cfb79329bb42ff98d/

Patch status: upstream.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/lighttpd/0002-autobuild-clock_gettime-lrt-with-glibc-2.17.patch

@@ -0,0 +1,155 @@
+From 4d920466f7a8163adb3de2862b48c53b24a9a915 Mon Sep 17 00:00:00 2001
+From: Glenn Strauss <gstrauss@gluelogic.com>
+Date: Mon, 18 Jul 2016 14:24:39 -0400
+Subject: [PATCH] [autobuild] clock_gettime() -lrt with glibc < 2.17
+
+clock_gettime() needs -lrt with glibc < 2.17,
+and possibly other platforms
+
+On systems without clock_gettime (-cough- Mac OSX -cough-),
+use gettimeofday() (deprecated in POSIX.1-2008) which is slightly
+lower precision, but reasonably fast in execution.  References:
+http://stackoverflow.com/questions/5167269/clock-gettime-alternative-in-mac-os-x
+http://stackoverflow.com/questions/11680461/monotonic-clock-on-osx
+https://discussions.apple.com/thread/6023936?tstart=0
+
+Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+---
+ configure.ac        |  5 ++++-
+ src/connections.c   |  4 ++--
+ src/log.c           | 20 ++++++++++++++++++++
+ src/log.h           |  3 +++
+ src/mod_accesslog.c | 12 ++++++++----
+ 5 files changed, 37 insertions(+), 7 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index ffe6a17..1d172a1 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -286,6 +286,9 @@ AC_SEARCH_LIBS(hstrerror,resolv)
+ dnl On Haiku accept() and friends are in libnetwork
+ AC_SEARCH_LIBS(accept,network)
+ 
++dnl clock_gettime() needs -lrt with glibc < 2.17, and possibly other platforms
++AC_SEARCH_LIBS([clock_gettime],[rt])
++
+ save_LIBS=$LIBS
+ AC_SEARCH_LIBS(dlopen,dl,[
+   AC_CHECK_HEADERS([dlfcn.h],[
+@@ -699,7 +702,7 @@ AC_CHECK_FUNCS([dup2 getcwd inet_ntoa inet_ntop inet_pton issetugid memset mmap
+ 		  gethostbyname poll epoll_ctl getrlimit chroot \
+ 		  getuid select signal pathconf madvise posix_fadvise posix_madvise \
+ 		  writev sigaction sendfile64 send_file kqueue port_create localtime_r gmtime_r \
+-		  memset_s explicit_bzero])
++		  memset_s explicit_bzero clock_gettime])
+ 
+ AC_MSG_CHECKING(if weak symbols are supported)
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+diff --git a/src/connections.c b/src/connections.c
+index e73a667..507838c 100644
+--- a/src/connections.c
++++ b/src/connections.c
+@@ -692,7 +692,7 @@ static int connection_handle_read_state(server *srv, connection *con)  {
+ 	if (con->request_count > 1 && is_request_start) {
+ 		con->request_start = srv->cur_ts;
+ 		if (con->conf.high_precision_timestamps)
+-			clock_gettime(CLOCK_REALTIME, &con->request_start_hp);
++			log_clock_gettime_realtime(&con->request_start_hp);
+ 	}
+ 
+ 		/* if there is a \r\n\r\n in the chunkqueue
+@@ -1000,7 +1000,7 @@ int connection_state_machine(server *srv, connection *con) {
+ 			con->request_start = srv->cur_ts;
+ 			con->read_idle_ts = srv->cur_ts;
+ 			if (con->conf.high_precision_timestamps)
+-				clock_gettime(CLOCK_REALTIME, &con->request_start_hp);
++				log_clock_gettime_realtime(&con->request_start_hp);
+ 
+ 			con->request_count++;
+ 			con->loops_per_request = 0;
+diff --git a/src/log.c b/src/log.c
+index b10bebe..21a2916 100644
+--- a/src/log.c
++++ b/src/log.c
+@@ -28,6 +28,26 @@
+ # define O_LARGEFILE 0
+ #endif
+ 
++#ifndef HAVE_CLOCK_GETTIME
++#ifdef HAVE_SYS_TIME_H
++# include <sys/time.h>  /* gettimeofday() */
++#endif
++#endif
++
++int log_clock_gettime_realtime (struct timespec *ts) {
++      #ifdef HAVE_CLOCK_GETTIME
++	return clock_gettime(CLOCK_REALTIME, ts);
++      #else
++	/* Mac OSX does not provide clock_gettime()
++	 * e.g. defined(__APPLE__) && defined(__MACH__) */
++	struct timeval tv;
++	gettimeofday(&tv, NULL);
++	ts->tv_sec  = tv.tv_sec;
++	ts->tv_nsec = tv.tv_usec * 1000;
++	return 0;
++      #endif
++}
++
+ /* retry write on EINTR or when not all data was written */
+ ssize_t write_all(int fd, const void* buf, size_t count) {
+ 	ssize_t written = 0;
+diff --git a/src/log.h b/src/log.h
+index 0570f0b..32ce8d4 100644
+--- a/src/log.h
++++ b/src/log.h
+@@ -4,6 +4,9 @@
+ 
+ #include "server.h"
+ 
++struct timespec; /* declaration */
++int log_clock_gettime_realtime (struct timespec *ts);
++
+ ssize_t write_all(int fd, const void* buf, size_t count);
+ 
+ /* Close fd and _try_ to get a /dev/null for it instead.
+diff --git a/src/mod_accesslog.c b/src/mod_accesslog.c
+index 5e82ef5..fba1cb4 100644
+--- a/src/mod_accesslog.c
++++ b/src/mod_accesslog.c
+@@ -765,7 +765,7 @@ REQUESTDONE_FUNC(log_access_write) {
+ 						off_t t; /*(expected to be 64-bit since large file support enabled)*/
+ 						long ns;
+ 						if (!(f->opt & FORMAT_FLAG_TIME_BEGIN)) {
+-							if (0 == ts.tv_sec) clock_gettime(CLOCK_REALTIME, &ts);
++							if (0 == ts.tv_sec) log_clock_gettime_realtime(&ts);
+ 							t = (off_t)ts.tv_sec;
+ 							ns = ts.tv_nsec;
+ 						} else {
+@@ -787,7 +787,7 @@ REQUESTDONE_FUNC(log_access_write) {
+ 						long ns;
+ 						char *ptr;
+ 						if (!(f->opt & FORMAT_FLAG_TIME_BEGIN)) {
+-							if (0 == ts.tv_sec) clock_gettime(CLOCK_REALTIME, &ts);
++							if (0 == ts.tv_sec) log_clock_gettime_realtime(&ts);
+ 							ns = ts.tv_nsec;
+ 						} else {
+ 							ns = con->request_start_hp.tv_nsec;
+@@ -880,9 +880,13 @@ REQUESTDONE_FUNC(log_access_write) {
+ 				} else {
+ 					const struct timespec * const bs = &con->request_start_hp;
+ 					off_t tdiff; /*(expected to be 64-bit since large file support enabled)*/
+-					if (0 == ts.tv_sec) clock_gettime(CLOCK_REALTIME, &ts);
++					if (0 == ts.tv_sec) log_clock_gettime_realtime(&ts);
+ 					tdiff = (off_t)(ts.tv_sec - bs->tv_sec)*1000000000 + (ts.tv_nsec - bs->tv_nsec);
+-					if (f->opt & FORMAT_FLAG_TIME_MSEC) {
++					if (tdiff <= 0) {
++						/* sanity check for time moving backwards
++						 * (daylight savings adjustment or leap seconds or ?) */
++						tdiff  = -1;
++					} else if (f->opt & FORMAT_FLAG_TIME_MSEC) {
+ 						tdiff +=  999999; /* ceil */
+ 						tdiff /= 1000000;
+ 					} else if (f->opt & FORMAT_FLAG_TIME_USEC) {
+-- 
+2.7.3
+

package/lighttpd/lighttpd.mk

@@ -11,6 +11,8 @@ LIGHTTPD_SITE = http://download.lighttpd.net/lighttpd/releases-$(LIGHTTPD_VERSIO
 LIGHTTPD_LICENSE = BSD-3c
 LIGHTTPD_LICENSE_FILES = COPYING
 LIGHTTPD_DEPENDENCIES = host-pkgconf
+# For 0002-autobuild-clock_gettime-lrt-with-glibc-2.17.patch
+LIGHTTPD_AUTORECONF = YES
 LIGHTTPD_CONF_OPTS = \
 	--libdir=/usr/lib/lighttpd \
 	--libexecdir=/usr/lib