clock_gettime.c: fix compilation on ios10 and macosx12

CMakeLists.txt

@@ -77,7 +77,11 @@ endif()
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
 check_library_exists("dl" "dlopen" "" HAVE_LIBDL)
-check_library_exists("rt" "clock_gettime" "" HAVE_LIBRT)
+
+check_library_exists(rt "clock_gettime" "" HAVE_LIBRT)
+if (NOT HAVE_LIBRT)
+	check_library_exists(c "clock_gettime" "" HAVE_LIBRT)
+endif()
 
 cmake_push_check_state(RESET)
 check_symbol_exists("res_ndestroy" "resolv.h" HAVE_RES_NDESTROY)

src/clock_gettime.c

 /*
  * Copyright (c), MM Weiss
  * All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without modification, 
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
- * 
- *     1. Redistributions of source code must retain the above copyright notice, 
+ *
+ *     1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
- *     
- *     2. Redistributions in binary form must reproduce the above copyright notice, 
- *     this list of conditions and the following disclaimer in the documentation 
+ *
+ *     2. Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
  *     and/or other materials provided with the distribution.
- *     
- *     3. Neither the name of the MM Weiss nor the names of its contributors 
- *     may be used to endorse or promote products derived from this software without 
+ *
+ *     3. Neither the name of the MM Weiss nor the names of its contributors
+ *     may be used to endorse or promote products derived from this software without
  *     specific prior written permission.
- * 
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
- * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
- * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
@@ -32,13 +32,13 @@
  *  gcc -Wall -c clock_gettime_stub.c
  *  posix realtime functions; MacOS user space glue
  */
- 
+
 /*  @comment
  *  other possible implementation using intel builtin rdtsc
  *  rdtsc-workaround: http://www.mcs.anl.gov/~kazutomo/rdtsc.html
- *  
+ *
  *  we could get the ticks by doing this
- * 
+ *
  *  __asm __volatile("mov %%ebx, %%esi\n\t"
  *  		"cpuid\n\t"
  *  		"xchg %%esi, %%ebx\n\t"
@@ -46,21 +46,20 @@
  *  		: "=a" (a),
  *  		  "=d" (d)
  * 	);
- 
+
  *  we could even replace our tricky sched_yield call by assembly code to get a better accurency,
- *  anyway the following C stub will satisfy 99% of apps using posix clock_gettime call, 
+ *  anyway the following C stub will satisfy 99% of apps using posix clock_gettime call,
  *  moreover, the setter version (clock_settime) could be easly written using mach primitives:
  *  http://www.opensource.apple.com/source/xnu/xnu-${VERSION}/osfmk/man/ (clock_[set|get]_time)
- *  
+ *
  *  hackers don't be crackers, don't you use a flush toilet?
- * 
+ *
  *
  *  @see draft: ./posix-realtime-stub/posix-realtime-stub.c
  *
  */
- 
 
-#ifdef __APPLE__
+#ifndef HAVE_LIBRT
 
 #pragma weak clock_gettime
 
@@ -86,7 +85,7 @@ int clock_gettime(clockid_t clk_id, struct timespec *tp) {
 	mach_timespec_t tm;
 	uint64_t start, end, delta, nano;
 	int retval = -1;
-	
+
 	if (!belle_sip_clock_serv_ready) { /*host_get_clock_service is pretty slow*/
 		if (KERN_SUCCESS != host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &belle_sip_calandar_clk)
 			|| KERN_SUCCESS != host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &belle_sip_system_clk) ) {

src/clock_gettime.h

@@ -19,7 +19,12 @@
 
 #ifndef CLOCK_GETTIME_H_
 #define CLOCK_GETTIME_H_
-#ifdef __APPLE__
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifndef HAVE_LIBRT
 typedef enum {
 	CLOCK_REALTIME,
 	CLOCK_MONOTONIC,