Define Genode::size_t as unsigned long

Fixes #2105

repos/base-linux/src/lib/base/ipc.cc

@@ -28,8 +28,6 @@
 
 /* Linux includes */
 #include <linux_syscalls.h>
-#include <sys/un.h>
-#include <sys/socket.h>
 
 using namespace Genode;
 
@@ -69,7 +67,7 @@ struct Protocol_header
 	/* badge of invoked object (on call) / exception code (on reply) */
 	unsigned long protocol_word;
 
-	size_t num_caps;
+	Genode::size_t num_caps;
 
 	/* badges of the transferred capability arguments */
 	unsigned long badges[Msgbuf_base::MAX_CAPS_PER_MSG];

repos/base-linux/src/lib/base/thread_env.cc

@@ -43,7 +43,7 @@ extern "C" int stdout_write(char const *);
 extern "C" __attribute__((weak)) int stdout_write(char const *s)
 {
 	raw(s);
-	return strlen(s);
+	return Genode::strlen(s);
 }
 
 /**

repos/base-linux/src/lib/lx_hybrid/lx_hybrid.cc

@@ -145,10 +145,12 @@ int main()
 #include <base/thread.h>
 #include <base/env.h>
 
-/* libc includes */
+/* host libc includes */
+#define size_t __SIZE_TYPE__ /* see comment in 'linux_syscalls.h' */
 #include <pthread.h>
 #include <stdio.h>
 #include <errno.h>
+#undef size_t
 
 using namespace Genode;
 

repos/base-linux/src/lib/syscall/linux_syscalls.h

@@ -32,18 +32,28 @@
 #define _GNU_SOURCE 1 /* needed to enable the definition of 'stat64' */
 #endif
 
+/* Genode includes */
+#include <util/string.h>
+#include <base/printf.h>
+#include <base/snprintf.h>
+#include <base/log.h>
+
+/*
+ * Resolve ambiguity between 'Genode::size_t' and the host's header's 'size_t'.
+ */
+#define size_t __SIZE_TYPE__
+
 /* Linux includes */
 #include <linux/futex.h>
 #include <unistd.h>
 #include <signal.h>
 #include <sched.h>
 #include <sys/syscall.h>
+#include <sys/un.h>
+#include <sys/socket.h>
+#include <sys/mman.h>
 
-/* Genode includes */
-#include <util/string.h>
-#include <base/printf.h>
-#include <base/snprintf.h>
-#include <base/log.h>
+#undef size_t
 
 
 /***********************************
@@ -197,7 +207,7 @@ inline void *lx_mmap(void *start, Genode::size_t length, int prot, int flags,
 }
 
 
-inline int lx_munmap(void *addr, size_t length)
+inline int lx_munmap(void *addr, Genode::size_t length)
 {
 	return lx_syscall(SYS_munmap, addr, length);
 }