Another bunch of FreeBSD related portability fixes (#571)

* Provide CGlobalRNG::result_type

Allows to use CGlobalRNG in std::shuffle, similar to fc61592

* Make bash shebang portable

* Make version fetch failure message more verbose

Let the package maintainer know which file is actually missing

* Implement gettid() on FreeBSD

* Fix rts/System/Platform/Misc.cpp on FreeBSD

* Make manpages optional

Author: AMDmi3

doc/CMakeLists.txt

@@ -1,6 +1,7 @@
+option(ENABLE_MANPAGES "Enable manpages" TRUE)
 
 ### make and install the man pages
-if    (UNIX)
+if    (UNIX AND ENABLE_MANPAGES)
 	find_package(SevenZip)
 	set(AsciiDoc_FIND_QUIETLY TRUE)
 	find_package(AsciiDoc)

doc/manpages/make_manpages.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 ORIG_DIR=$(pwd)
 

rts/System/GlobalRNG.h

@@ -102,6 +102,8 @@ template<typename RNG, bool synced> class CGlobalRNG {
 	typedef typename RNG::val_type rng_val_type;
 	typedef typename RNG::res_type rng_res_type;
 
+	using result_type = rng_res_type;
+
 	static_assert(std::numeric_limits<float>::digits == 24, "sign plus mantissa bits should be 24");
 
 	void Seed(rng_val_type seed) { SetSeed(seed); }

rts/System/Platform/Linux/ThreadSupport.cpp

@@ -8,6 +8,10 @@
 #include <fstream>
 #include <sys/syscall.h>
 
+#if defined(__FreeBSD__)
+	#include <pthread_np.h>  // for pthread_getthreadid_np
+#endif
+
 #include "System/Log/ILog.h"
 #include "System/Platform/Threading.h"
 
@@ -42,7 +46,11 @@ enum LinuxThreadState {
  * There is no glibc wrapper for this system call, so you have to write one:
  */
 static int gettid() {
+#if defined(__FreeBSD__)
+	return pthread_getthreadid_np();
+#else
 	return syscall(SYS_gettid);
+#endif
 }
 
 /**

rts/System/Platform/Misc.cpp

@@ -29,7 +29,9 @@
 	#include <mach-o/dyld.h>
 
 #elif defined( __FreeBSD__)
+	#include <sys/types.h>
 	#include <sys/sysctl.h>
+	#include <ifaddrs.h>
 
 #else
 
@@ -714,7 +716,7 @@ namespace Platform
 		return (GetMacType(macAddr, 0), macAddr);
 	}
 
-	#elif defined(__APPLE__)
+	#elif defined(__APPLE__) || defined (__FreeBSD__)
 
 	std::array<uint8_t, 6> GetRawMacAddr() {
 		// TODO: http://lists.freebsd.org/pipermail/freebsd-hackers/2004-June/007415.html

rts/build/cmake/UtilVersion.cmake

@@ -183,7 +183,7 @@ macro (fetch_spring_version dir prefix)
 		# Try to fetch version through VERSION file
 		get_version_from_file(${prefix}_VERSION "${dir}/VERSION")
 		if (${${prefix}_VERSION-NOTFOUND})
-			message (FATAL_ERROR "Failed to fetch ${prefix} version.")
+			message (FATAL_ERROR "Failed to fetch ${prefix} version from ${dir}/VERSION.")
 		else ()
 			message (STATUS "${prefix} version fetched from VERSION file: ${${prefix}_VERSION}")
 		endif ()