From 8c6d0b51c719e1817e308375d129b17ede3b82fc Mon Sep 17 00:00:00 2001
From: Tiger Wang <ziwei.tiger@hotmail.co.uk>
Date: Mon, 7 Nov 2016 22:15:07 +0000
Subject: Use CMake's Android generators to crosscompile

---
 src/OSSupport/CMakeLists.txt           |  8 --------
 src/OSSupport/Errors.cpp               |  2 +-
 src/OSSupport/File.cpp                 |  6 +++++-
 src/OSSupport/NetworkInterfaceEnum.cpp | 14 +++++++-------
 src/OSSupport/NetworkSingleton.cpp     | 15 +++++++++++++++
 src/OSSupport/StackTrace.cpp           |  4 ++--
 6 files changed, 30 insertions(+), 19 deletions(-)

(limited to 'src/OSSupport')

diff --git a/src/OSSupport/CMakeLists.txt b/src/OSSupport/CMakeLists.txt
index 876b4f789..22699f7cd 100644
--- a/src/OSSupport/CMakeLists.txt
+++ b/src/OSSupport/CMakeLists.txt
@@ -43,12 +43,4 @@ endif()
 
 if(NOT MSVC)
 	add_library(OSSupport ${SRCS} ${HDRS})
-
-	if(UNIX)
-		if(NOT APPLE)
-			target_link_libraries(OSSupport rt)
-		endif()
-
-		target_link_libraries(OSSupport pthread event_core event_extra)
-	endif()
 endif()
diff --git a/src/OSSupport/Errors.cpp b/src/OSSupport/Errors.cpp
index a05650111..004cbaccc 100644
--- a/src/OSSupport/Errors.cpp
+++ b/src/OSSupport/Errors.cpp
@@ -22,7 +22,7 @@ AString GetOSErrorString( int a_ErrNo)
 
 	// According to http://linux.die.net/man/3/strerror_r there are two versions of strerror_r():
 
-	#if defined(__GLIBC__) && defined( _GNU_SOURCE) && !defined(ANDROID_NDK)  // GNU version of strerror_r()
+	#if defined(__GLIBC__) && defined( _GNU_SOURCE) && !defined(ANDROID)  // GNU version of strerror_r()
 
 	char * res = strerror_r( errno, buffer, ARRAYCOUNT(buffer));
 	if (res != nullptr)
diff --git a/src/OSSupport/File.cpp b/src/OSSupport/File.cpp
index a59f599ae..062161144 100644
--- a/src/OSSupport/File.cpp
+++ b/src/OSSupport/File.cpp
@@ -653,9 +653,13 @@ unsigned cFile::GetLastModificationTime(const AString & a_FileName)
 	{
 		return 0;
 	}
-	#ifdef _WIN32
+	#if defined(_WIN32)
 		// Windows returns times in local time already
 		return static_cast<unsigned>(st.st_mtime);
+	#elif defined(ANDROID)
+		// Identical to Linux below, but st_mtime is an unsigned long, so cast is needed:
+		auto Time = static_cast<time_t>(st.st_mtime);
+		return static_cast<unsigned>(mktime(localtime(&Time)));
 	#else
 		// Linux returns UTC time, convert to local timezone:
 		return static_cast<unsigned>(mktime(localtime(&st.st_mtime)));
diff --git a/src/OSSupport/NetworkInterfaceEnum.cpp b/src/OSSupport/NetworkInterfaceEnum.cpp
index d3a254c23..439710c38 100644
--- a/src/OSSupport/NetworkInterfaceEnum.cpp
+++ b/src/OSSupport/NetworkInterfaceEnum.cpp
@@ -7,10 +7,10 @@
 #include "Network.h"
 #include "event2/util.h"
 
-#ifdef _WIN32
+#if defined(_WIN32)
 	#include <IPHlpApi.h>
 	#pragma comment(lib, "IPHLPAPI.lib")
-#else  // _WIN32
+#elif !defined(ANDROID)  // _WIN32
 	#include <sys/types.h>
 	#include <ifaddrs.h>
 	#include <netinet/in.h>
@@ -21,7 +21,7 @@
 
 
 
-#ifdef _WIN32
+#if defined(_WIN32)
 
 /** Converts the SOCKET_ADDRESS structure received from the OS into an IP address string. */
 static AString PrintAddress(SOCKET_ADDRESS & a_Addr)
@@ -50,7 +50,7 @@ static AString PrintAddress(SOCKET_ADDRESS & a_Addr)
 	return IP;
 }
 
-#else  // _WIN32
+#elif !defined(ANDROID)  // _WIN32
 
 static AString PrintAddress(ifaddrs * InterfaceAddress)
 {
@@ -82,7 +82,7 @@ static AString PrintAddress(ifaddrs * InterfaceAddress)
 	}
 }
 
-#endif  // else _WIN32
+#endif  // else !ANDROID
 
 
 
@@ -92,7 +92,7 @@ AStringVector cNetwork::EnumLocalIPAddresses(void)
 {
 	AStringVector res;
 
-	#ifdef _WIN32
+	#if defined(_WIN32)
 
 		// Query the OS for all adapters' addresses:
 		char buffer[64 KiB];  // A buffer backing the address list
@@ -129,7 +129,7 @@ AStringVector cNetwork::EnumLocalIPAddresses(void)
 			}  // for pUnicast
 		}  // for pCurrAddresses
 
-	#else  // _WIN32
+	#elif !defined(ANDROID)  // _WIN32
 
 		struct ifaddrs * ifAddrStruct = nullptr;
 		getifaddrs(&ifAddrStruct);
diff --git a/src/OSSupport/NetworkSingleton.cpp b/src/OSSupport/NetworkSingleton.cpp
index dcf17bccb..3a8dbbdc7 100644
--- a/src/OSSupport/NetworkSingleton.cpp
+++ b/src/OSSupport/NetworkSingleton.cpp
@@ -13,6 +13,11 @@
 #include "IPLookup.h"
 #include "HostnameLookup.h"
 
+#ifdef ANDROID
+	// For DNS server retrieval
+	#include <sys/system_properties.h>
+#endif
+
 
 
 
@@ -89,6 +94,16 @@ void cNetworkSingleton::Initialise(void)
 		abort();
 	}
 
+	#ifdef ANDROID
+		char PropertyBuffer[PROP_VALUE_MAX];
+
+		__system_property_get("net.dns1", PropertyBuffer);
+		evdns_base_nameserver_ip_add(m_DNSBase, PropertyBuffer);
+
+		__system_property_get("net.dns2", PropertyBuffer);
+		evdns_base_nameserver_ip_add(m_DNSBase, PropertyBuffer);
+	#endif
+
 	// Create the event loop thread:
 	m_HasTerminated = false;
 	m_EventLoopThread = std::thread(RunEventLoop, this);
diff --git a/src/OSSupport/StackTrace.cpp b/src/OSSupport/StackTrace.cpp
index 030566065..c84e2cbca 100644
--- a/src/OSSupport/StackTrace.cpp
+++ b/src/OSSupport/StackTrace.cpp
@@ -7,7 +7,7 @@
 #include "StackTrace.h"
 #ifdef _WIN32
 	#include "../StackWalker.h"
-#else
+#elif !defined(ANDROID)  // The Android NDK has no execinfo header
 	#ifdef __GLIBC__
 		#include <execinfo.h>
 	#endif
@@ -32,7 +32,7 @@ void PrintStackTrace(void)
 			}
 		} sw;
 		sw.ShowCallstack();
-	#else
+	#elif !defined(ANDROID)
 		#ifdef __GLIBC__
 			// Use the backtrace() function to get and output the stackTrace:
 			// Code adapted from https://stackoverflow.com/questions/77005/how-to-generate-a-stacktrace-when-my-gcc-c-app-crashes
-- 
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