diff --git a/common.gypi b/common.gypi
index 998d7db6c..6a5b89a19 100644
--- a/common.gypi
+++ b/common.gypi
@@ -95,7 +95,7 @@
     ],
 
     'cflags': [
-      '-std=c99',
+      #'-std=c99',
     ],
 
     'configurations': {
diff --git a/src/xenia/atomic.h b/src/xenia/atomic.h
index 33c9d09ee..d1ac3b539 100644
--- a/src/xenia/atomic.h
+++ b/src/xenia/atomic.h
@@ -69,7 +69,16 @@ XEFORCEINLINE void* xe_atomic_stack_dequeue(xe_atomic_stack_t* stack,
 
 #elif XE_LIKE(POSIX)
 
-#error TODO(benvanik): POSIX atomic primitives
+#define xe_atomic_inc_32(value) \
+    __sync_add_and_fetch(value, 1)
+#define xe_atomic_dec_32(value) \
+    __sync_sub_and_fetch(value, 1)
+#define xe_atomic_add_32(amount, value) \
+    __sync_fetch_and_add(value, amount)
+#define xe_atomic_sub_32(amount, value) \
+    __sync_fetch_and_sub(value, amount)
+#define xe_atomic_cas_32(oldValue, newValue, value) \
+    __sync_bool_compare_and_swap(value, oldValue, newValue)
 
 #else
 
diff --git a/src/xenia/byte_order.h b/src/xenia/byte_order.h
index e0cdfdca4..b9a73e3ae 100644
--- a/src/xenia/byte_order.h
+++ b/src/xenia/byte_order.h
@@ -24,9 +24,9 @@
 #define XESWAP32                        OSSwapInt32
 #define XESWAP64                        OSSwapInt64
 #else
-#define XESWAP16                        bswap_16
-#define XESWAP32                        bswap_32
-#define XESWAP64                        bswap_64
+#define XESWAP16                        __bswap_16
+#define XESWAP32                        __bswap_32
+#define XESWAP64                        __bswap_64
 #endif
 
 
diff --git a/src/xenia/core/socket_posix.cc b/src/xenia/core/socket_posix.cc
index 7ffb7508f..5ba16271a 100644
--- a/src/xenia/core/socket_posix.cc
+++ b/src/xenia/core/socket_posix.cc
@@ -185,7 +185,7 @@ int xe_socket_loop_poll(xe_socket_loop_t* loop,
     XEIGNORE(recv(loop->notify_rd_id, &dummy, 1, 0));
   }
   loop->events[1].revents = 0;
-  loop->events[1].events = POLL_IN;
+  loop->events[1].events = POLLIN;
 
   // Check send/recv.
   loop->pending_recv = (loop->events[0].revents & POLLIN) != 0;
diff --git a/src/xenia/core/thread.cc b/src/xenia/core/thread.cc
index 8bf055e68..59d585fd6 100644
--- a/src/xenia/core/thread.cc
+++ b/src/xenia/core/thread.cc
@@ -109,7 +109,11 @@ int xe_thread_start(xe_thread_ref thread) {
 
 static void* xe_thread_callback_pthreads(void* param) {
   xe_thread_t* thread = reinterpret_cast<xe_thread_t*>(param);
+#if XE_LIKE(OSX)
   XEIGNORE(pthread_setname_np(thread->name));
+#else
+  pthread_setname_np(pthread_self(), thread->name);
+#endif  // OSX
   thread->callback(thread->callback_param);
   return 0;
 }
diff --git a/src/xenia/dbg/simple_sha1.cc b/src/xenia/dbg/simple_sha1.cc
index daa112470..8529a6560 100644
--- a/src/xenia/dbg/simple_sha1.cc
+++ b/src/xenia/dbg/simple_sha1.cc
@@ -12,6 +12,7 @@
 #if XE_PLATFORM(WIN32)
 #include <winsock2.h>
 #else
+#include <arpa/inet.h>
 #endif  // WIN32
 
 
diff --git a/src/xenia/kernel/modules/xboxkrnl/objects/xthread.cc b/src/xenia/kernel/modules/xboxkrnl/objects/xthread.cc
index 6293b2a59..336fe8af8 100644
--- a/src/xenia/kernel/modules/xboxkrnl/objects/xthread.cc
+++ b/src/xenia/kernel/modules/xboxkrnl/objects/xthread.cc
@@ -186,11 +186,16 @@ X_STATUS XThread::PlatformCreate() {
 
   int result_code;
   if (creation_params_.creation_flags & X_CREATE_SUSPENDED) {
+#if XE_PLATFORM(OSX)
     result_code = pthread_create_suspended_np(
         reinterpret_cast<pthread_t*>(&thread_handle_),
         &attr,
         &XThreadStartCallbackPthreads,
         this);
+#else
+    // TODO(benvanik): pthread_create_suspended_np on linux
+    XEASSERTALWAYS();
+#endif  // OSX
   } else {
     result_code = pthread_create(
         reinterpret_cast<pthread_t*>(&thread_handle_),
diff --git a/src/xenia/platform.h b/src/xenia/platform.h
index d3b156ba2..300a634e8 100644
--- a/src/xenia/platform.h
+++ b/src/xenia/platform.h
@@ -153,7 +153,7 @@ int xe_main_thunk(
     void* user_main, const char* usage);
 #define XE_MAIN_THUNK(NAME, USAGE) \
     int main(int argc, char **argv) { \
-      return xe_main_thunk(argc, argv, NAME, USAGE); \
+      return xe_main_thunk(argc, argv, (void*)NAME, USAGE); \
     }
 #endif  // WIN32
 
diff --git a/src/xenia/platform_includes.h b/src/xenia/platform_includes.h
index 039216591..60d81bc2e 100644
--- a/src/xenia/platform_includes.h
+++ b/src/xenia/platform_includes.h
@@ -33,6 +33,11 @@
 #pragma warning(disable : 4068)
 #endif  // MSVC
 
+#if XE_LIKE(POSIX)
+#include <unistd.h>
+#include <endian.h>
+#endif  // POSIX
+
 #include <stddef.h>
 #include <memory.h>
 #include <string.h>
diff --git a/xenia.gyp b/xenia.gyp
index 1cd4209a7..e752d5e53 100644
--- a/xenia.gyp
+++ b/xenia.gyp
@@ -49,6 +49,14 @@
                   ],
                 },
               }],
+              ['OS == "linux"', {
+                'libraries': [
+                  '-L../../../<@(llvm_libdir)/',
+                  '<!@(<(llvm_config) --libs all)',
+                  '-lpthread',
+                  '-ldl',
+                ],
+              }],
             ],
           }],
         ],