diff --git a/jerry-libc/CMakeLists.txt b/jerry-libc/CMakeLists.txt
index 535b3499b..1bee12175 100644
--- a/jerry-libc/CMakeLists.txt
+++ b/jerry-libc/CMakeLists.txt
@@ -77,10 +77,10 @@ set(COMPILE_FLAGS_LIBC "${COMPILE_FLAGS_JERRY} ${C_FLAGS_JERRY}")
 
  # Platform-specific
   # Linux
-   file(GLOB SOURCE_LIBC_LINUX target/linux/*.c target/linux/*.S)
+   file(GLOB SOURCE_LIBC_LINUX target/posix/*.c target/posix/*.S)
 
   # Darwin
-   file(GLOB SOURCE_LIBC_DARWIN target/darwin/*.c target/darwin/*.S)
+   file(GLOB SOURCE_LIBC_DARWIN target/posix/*.c target/posix/*.S)
 
   # MCU
    # stm32f3
diff --git a/jerry-libc/target/darwin/jerry-asm.S b/jerry-libc/target/darwin/jerry-asm.S
deleted file mode 100644
index cbd2b84ae..000000000
--- a/jerry-libc/target/darwin/jerry-asm.S
+++ /dev/null
@@ -1,56 +0,0 @@
-#ifdef __TARGET_HOST_x64
-# include "arch/x86-64.h"
-#elif defined (__TARGET_HOST_x86)
-# include "arch/x86-32.h"
-#elif defined (__TARGET_HOST_ARMv7)
-# include "arch/arm-v7.h"
-#else /* !__TARGET_HOST_x64 && !__TARGET_HOST_x86 && !__TARGET_HOST_ARMv7 */
-# error "!__TARGET_HOST_x64 && !__TARGET_HOST_x86 && !__TARGET_HOST_ARMv7"
-#endif /* !__TARGET_HOST_x64 && !__TARGET_HOST_x86 && !__TARGET_HOST_ARMv7 */
-
-.global _start
-_start:
-  _START
-
-.global syscall_0
-syscall_0:
-  SYSCALL_0
-
-.global syscall_1
-syscall_1:
-  SYSCALL_1
-
-.global syscall_2
-syscall_2:
-  SYSCALL_2
-
-.global syscall_3
-syscall_3:
-  SYSCALL_3
-
-/**
- * setjmp (jmp_buf env)
- *
- * See also:
- *          longjmp
- *
- * @return 0 - if returns from direct call,
- *         nonzero - if returns after longjmp.
- */
-.global setjmp
-setjmp:
-  _SETJMP
-
-/**
- * longjmp (jmp_buf env, int val)
- *
- * Note:
- *      if val is not 0, then it would be returned from setjmp,
- *      otherwise - 0 would be returned.
- *
- * See also:
- *          setjmp
- */
-.global longjmp
-longjmp:
-  _LONGJMP
diff --git a/jerry-libc/target/darwin/jerry-libc-target.c b/jerry-libc/target/darwin/jerry-libc-target.c
deleted file mode 100644
index 0b6aaeaa5..000000000
--- a/jerry-libc/target/darwin/jerry-libc-target.c
+++ /dev/null
@@ -1,324 +0,0 @@
-/* Copyright 2014-2016 Samsung Electronics Co., Ltd.
- * Copyright 2016 University of Szeged.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/**
- * Jerry libc platform-specific functions darwin implementation
- */
-
-#include <assert.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/syscall.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-
-#include "jerry-libc-defs.h"
-
-extern long int syscall_0 (long int syscall_no);
-extern long int syscall_1 (long int syscall_no, long int arg1);
-extern long int syscall_2 (long int syscall_no, long int arg1, long int arg2);
-extern long int syscall_3 (long int syscall_no, long int arg1, long int arg2, long int arg3);
-
-/** Output of character. Writes the character c, cast to an unsigned char, to stdout.  */
-int
-putchar (int c)
-{
-  fwrite (&c, 1, sizeof (char), stdout);
-
-  return c;
-} /* putchar */
-
-/**
- * Output specified string
- */
-int
-puts (const char *s) /**< string to print */
-{
-  while (*s)
-  {
-    putchar (*s);
-
-    s++;
-  }
-
-  return 0;
-} /* puts */
-
-/**
- * Exit - cause normal process termination with specified status code
- */
-void __attr_noreturn___ __attr_used___
-exit (int status) /**< status code */
-{
-  syscall_1 (SYS_close, (long int) stdin);
-  syscall_1 (SYS_close, (long int) stdout);
-  syscall_1 (SYS_close, (long int) stderr);
-
-  syscall_1 (SYS_exit, status);
-
-  while (true)
-  {
-    /* unreachable */
-  }
-} /* exit */
-
-/**
- * Abort current process, producing an abnormal program termination.
- * The function raises the SIGABRT signal.
- */
-void __attr_noreturn___ __attr_used___
-abort (void)
-{
-  syscall_1 (SYS_close, (long int) stdin);
-  syscall_1 (SYS_close, (long int) stdout);
-  syscall_1 (SYS_close, (long int) stderr);
-
-  raise (SIGABRT);
-
-  while (true)
-  {
-    /* unreachable */
-  }
-} /* abort */
-
-/**
- * Send a signal to the current process.
- */
-int __attr_used___
-raise (int sig)
-{
-  return (int) syscall_2 (SYS_kill, syscall_0 (SYS_getpid), sig);
-} /* raise */
-
-/**
- * fopen
- *
- * @return FILE pointer - upon successful completion,
- *         NULL - otherwise
- */
-FILE *
-fopen (const char *path, /**< file path */
-       const char *mode) /**< file open mode */
-{
-  bool may_read = false;
-  bool may_write = false;
-  bool truncate = false;
-  bool create_if_not_exist = false;
-  bool position_at_end = false;
-
-  assert (path != NULL && mode != NULL);
-  assert (mode[1] == '+' || mode[1] == '\0');
-
-  switch (mode[0])
-  {
-    case 'r':
-    {
-      may_read = true;
-      may_write = (mode[1] == '+');
-      break;
-    }
-    case 'w':
-    {
-      may_write = true;
-      truncate = true;
-      create_if_not_exist = true;
-      may_read = (mode[1] == '+');
-      break;
-    }
-    case 'a':
-    {
-      may_write = true;
-      position_at_end = true;
-      create_if_not_exist = true;
-      if (mode[1] == '+')
-      {
-        assert (!"unsupported mode a+");
-      }
-      break;
-    }
-    default:
-    {
-      assert (!"unsupported mode");
-    }
-  }
-
-  int flags = 0;
-  int access = S_IRUSR | S_IWUSR;
-  if (may_read && !may_write)
-  {
-    flags = O_RDONLY;
-  }
-  else if (!may_read && may_write)
-  {
-    flags = O_WRONLY;
-  }
-  else
-  {
-    assert (may_read && may_write);
-
-    flags = O_RDWR;
-  }
-
-  if (truncate)
-  {
-    flags |= O_TRUNC;
-  }
-
-  if (create_if_not_exist)
-  {
-    flags |= O_CREAT;
-  }
-
-  if (position_at_end)
-  {
-    flags |= O_APPEND;
-  }
-
-  long int ret = syscall_3 (SYS_open, (long int) path, flags, access);
-
-  return (void *) (uintptr_t) (ret);
-} /* fopen */
-
-/**
- * The rewind () function sets the file position indicator
- * for the stream pointed to by STREAM to the beginning of the file.
- */
-void
-rewind (FILE *stream) /**< stream pointer */
-{
-  syscall_3 (SYS_lseek, (long int) stream, 0, SEEK_SET);
-} /* rewind */
-
-/**
- * fclose
- *
- * @return 0 - upon successful completion,
- *         non-zero value - otherwise.
- */
-int
-fclose (FILE *fp) /**< stream pointer */
-{
-  syscall_2 (SYS_close, (long int) fp, 0);
-
-  return 0;
-} /* fclose */
-
-/**
- * fseek
- */
-int
-fseek (FILE * fp, /**< stream pointer */
-       long offset, /**< offset */
-       int whence) /**< specifies position type
-                    *   to add offset to */
-{
-  syscall_3 (SYS_lseek, (long int) fp, offset, whence);
-
-  return 0;
-} /* fseek */
-
-/**
- * ftell
- */
-long
-ftell (FILE * fp) /**< stream pointer */
-{
-  long int ret = syscall_3 (SYS_lseek, (long int) fp, 0, SEEK_CUR);
-
-  return ret;
-} /* ftell */
-
-/**
- * fread
- *
- * @return number of elements read
- */
-size_t
-fread (void *ptr, /**< address of buffer to read to */
-       size_t size, /**< size of elements to read */
-       size_t nmemb, /**< number of elements to read */
-       FILE *stream) /**< stream pointer */
-{
-  long int ret;
-  size_t bytes_read = 0;
-
-  if (size == 0)
-  {
-    return 0;
-  }
-
-  do
-  {
-    ret = syscall_3 (SYS_read,
-                     (long int) stream,
-                     (long int) ((uint8_t *) ptr + bytes_read),
-                     (long int) (size * nmemb - bytes_read));
-
-    bytes_read += (size_t) ret;
-  }
-  while (bytes_read != size * nmemb && ret != 0);
-
-  return bytes_read / size;
-} /* fread */
-
-/**
- * fwrite
- *
- * @return number of elements written
- */
-size_t
-fwrite (const void *ptr, /**< data to write */
-        size_t size, /**< size of elements to write */
-        size_t nmemb, /**< number of elements */
-        FILE *stream) /**< stream pointer */
-{
-  size_t bytes_written = 0;
-
-  if (size == 0)
-  {
-    return 0;
-  }
-
-  do
-  {
-    long int ret = syscall_3 (SYS_write,
-                              (long int) stream,
-                              (long int) ((uint8_t *) ptr + bytes_written),
-                              (long int) (size * nmemb - bytes_written));
-
-    bytes_written += (size_t) ret;
-  }
-  while (bytes_written != size * nmemb);
-
-  return bytes_written / size;
-} /* fwrite */
-
-/**
- * This function can get the time as well as a timezone.
- *
- * @return 0 if success, -1 otherwise
- */
-int
-gettimeofday (void *tp,  /**< struct timeval */
-              void *tzp) /**< struct timezone */
-{
-  return (int) syscall_2 (gettimeofday, (long int) tp, (long int) tzp);
-} /* gettimeofday */
diff --git a/jerry-libc/target/linux/jerry-asm.S b/jerry-libc/target/linux/jerry-asm.S
deleted file mode 100644
index 42b541b73..000000000
--- a/jerry-libc/target/linux/jerry-asm.S
+++ /dev/null
@@ -1,70 +0,0 @@
-#ifdef __TARGET_HOST_x64
-# include "arch/x86-64.h"
-#elif defined (__TARGET_HOST_x86)
-# include "arch/x86-32.h"
-#elif defined (__TARGET_HOST_ARMv7)
-# include "arch/arm-v7.h"
-#else /* !__TARGET_HOST_x64 && !__TARGET_HOST_x86 && !__TARGET_HOST_ARMv7 */
-# error "!__TARGET_HOST_x64 && !__TARGET_HOST_x86 && !__TARGET_HOST_ARMv7"
-#endif /* !__TARGET_HOST_x64 && !__TARGET_HOST_x86 && !__TARGET_HOST_ARMv7 */
-
-.global _start
-.type _start, %function
-_start:
-  _START
-.size _start, . - _start
-
-.global syscall_0
-.type syscall_0, %function
-syscall_0:
-  SYSCALL_0
-.size syscall_0, . - syscall_0
-
-.global syscall_1
-.type syscall_1, %function
-syscall_1:
-  SYSCALL_1
-.size syscall_1, . - syscall_1
-
-.global syscall_2
-.type syscall_2, %function
-syscall_2:
-  SYSCALL_2
-.size syscall_2, . - syscall_2
-
-.global syscall_3
-.type syscall_3, %function
-syscall_3:
-  SYSCALL_3
-.size syscall_3, . - syscall_3
-
-/**
- * setjmp (jmp_buf env)
- *
- * See also:
- *          longjmp
- *
- * @return 0 - if returns from direct call,
- *         nonzero - if returns after longjmp.
- */
-.global setjmp
-.type setjmp, %function
-setjmp:
-  _SETJMP
-.size setjmp, . - setjmp
-
-/**
- * longjmp (jmp_buf env, int val)
- *
- * Note:
- *      if val is not 0, then it would be returned from setjmp,
- *      otherwise - 0 would be returned.
- *
- * See also:
- *          setjmp
- */
-.global longjmp
-.type longjmp, %function
-longjmp:
-  _LONGJMP
-.size longjmp, . - setjmp
diff --git a/jerry-libc/target/posix/jerry-asm.S b/jerry-libc/target/posix/jerry-asm.S
new file mode 100644
index 000000000..2a33c6faa
--- /dev/null
+++ b/jerry-libc/target/posix/jerry-asm.S
@@ -0,0 +1,76 @@
+#if defined (__TARGET_HOST_x64)
+#include "arch/x86-64.h"
+#elif defined (__TARGET_HOST_x86)
+#include "arch/x86-32.h"
+#elif defined (__TARGET_HOST_ARMv7)
+#include "arch/arm-v7.h"
+#else
+#error "Unsupported architecture"
+#endif /* !__TARGET_HOST_x64 && !__TARGET_HOST_x86 && !__TARGET_HOST_ARMv7 */
+
+#if defined (__linux__)
+.macro func _name
+.global \_name
+.type \_name, %function
+\_name:
+.endm
+.macro endfunc _name
+.size \_name, .-\_name
+.endm
+#elif defined (__APPLE__) && defined (__MACH__)
+.macro func _name
+.global \_name
+\_name:
+.endm
+.macro endfunc _name
+.endm
+#else
+#error "Unsupported OS"
+#endif /* !__linux && !(__APPLE__ && __MACH__) */
+
+func _start
+  _START
+endfunc _start
+
+func syscall_0
+  SYSCALL_0
+endfunc syscall_0
+
+func syscall_1
+  SYSCALL_1
+endfunc syscall_1
+
+func syscall_2
+  SYSCALL_2
+endfunc syscall_2
+
+func syscall_3
+  SYSCALL_3
+endfunc syscall_3
+
+/**
+ * setjmp (jmp_buf env)
+ *
+ * See also:
+ *          longjmp
+ *
+ * @return 0 - if returns from direct call,
+ *         nonzero - if returns after longjmp.
+ */
+func setjmp
+  _SETJMP
+endfunc setjmp
+
+/**
+ * longjmp (jmp_buf env, int val)
+ *
+ * Note:
+ *      if val is not 0, then it would be returned from setjmp,
+ *      otherwise - 0 would be returned.
+ *
+ * See also:
+ *          setjmp
+ */
+func longjmp
+  _LONGJMP
+endfunc longjmp
diff --git a/jerry-libc/target/linux/jerry-libc-target.c b/jerry-libc/target/posix/jerry-libc-target.c
similarity index 80%
rename from jerry-libc/target/linux/jerry-libc-target.c
rename to jerry-libc/target/posix/jerry-libc-target.c
index fb3179dc9..c169280df 100644
--- a/jerry-libc/target/linux/jerry-libc-target.c
+++ b/jerry-libc/target/posix/jerry-libc-target.c
@@ -15,7 +15,7 @@
  */
 
 /**
- * Jerry libc platform-specific functions linux implementation
+ * Jerry libc platform-specific functions posix implementation
  */
 
 #include <assert.h>
@@ -25,11 +25,20 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <syscall.h>
+#include <sys/syscall.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/time.h>
 
+#if defined (__linux__)
+#define SYSCALL_NO(NAME) __NR_ ## NAME
+#elif defined (__APPLE__) && defined (__MACH__)
+#define SYS_exit_group SYS_exit
+#define SYSCALL_NO(NAME) SYS_ ## NAME
+#else
+#error "Unsupported OS"
+#endif /* !__linux && !(__APPLE__ && __MACH__) */
+
 #include "jerry-libc-defs.h"
 
 extern long int syscall_0 (long int syscall_no);
@@ -68,11 +77,11 @@ puts (const char *s) /**< string to print */
 void __attr_noreturn___ __attr_used___
 exit (int status) /**< status code */
 {
-  syscall_1 (__NR_close, (long int) stdin);
-  syscall_1 (__NR_close, (long int) stdout);
-  syscall_1 (__NR_close, (long int) stderr);
+  syscall_1 (SYSCALL_NO (close), (long int) stdin);
+  syscall_1 (SYSCALL_NO (close), (long int) stdout);
+  syscall_1 (SYSCALL_NO (close), (long int) stderr);
 
-  syscall_1 (__NR_exit_group, status);
+  syscall_1 (SYSCALL_NO (exit_group), status);
 
   while (true)
   {
@@ -87,9 +96,9 @@ exit (int status) /**< status code */
 void __attr_noreturn___ __attr_used___
 abort (void)
 {
-  syscall_1 (__NR_close, (long int) stdin);
-  syscall_1 (__NR_close, (long int) stdout);
-  syscall_1 (__NR_close, (long int) stderr);
+  syscall_1 (SYSCALL_NO (close), (long int) stdin);
+  syscall_1 (SYSCALL_NO (close), (long int) stdout);
+  syscall_1 (SYSCALL_NO (close), (long int) stderr);
 
   raise (SIGABRT);
 
@@ -105,7 +114,7 @@ abort (void)
 int __attr_used___
 raise (int sig)
 {
-  return (int) syscall_2 (__NR_kill, syscall_0 (__NR_getpid), sig);
+  return (int) syscall_2 (SYSCALL_NO (kill), syscall_0 (SYSCALL_NO (getpid)), sig);
 } /* raise */
 
 /**
@@ -192,7 +201,7 @@ fopen (const char *path, /**< file path */
     flags |= O_APPEND;
   }
 
-  long int ret = syscall_3 (__NR_open, (long int) path, flags, access);
+  long int ret = syscall_3 (SYSCALL_NO (open), (long int) path, flags, access);
 
   return (void *) (uintptr_t) (ret);
 } /* fopen */
@@ -204,7 +213,7 @@ fopen (const char *path, /**< file path */
 void
 rewind (FILE *stream) /**< stream pointer */
 {
-  syscall_3 (__NR_lseek, (long int) stream, 0, SEEK_SET);
+  syscall_3 (SYSCALL_NO (lseek), (long int) stream, 0, SEEK_SET);
 } /* rewind */
 
 /**
@@ -216,7 +225,7 @@ rewind (FILE *stream) /**< stream pointer */
 int
 fclose (FILE *fp) /**< stream pointer */
 {
-  syscall_2 (__NR_close, (long int) fp, 0);
+  syscall_2 (SYSCALL_NO (close), (long int) fp, 0);
 
   return 0;
 } /* fclose */
@@ -230,7 +239,7 @@ fseek (FILE * fp, /**< stream pointer */
        int whence) /**< specifies position type
                     *   to add offset to */
 {
-  syscall_3 (__NR_lseek, (long int) fp, offset, whence);
+  syscall_3 (SYSCALL_NO (lseek), (long int) fp, offset, whence);
 
   return 0;
 } /* fseek */
@@ -241,7 +250,7 @@ fseek (FILE * fp, /**< stream pointer */
 long
 ftell (FILE * fp) /**< stream pointer */
 {
-  long int ret = syscall_3 (__NR_lseek, (long int) fp, 0, SEEK_CUR);
+  long int ret = syscall_3 (SYSCALL_NO (lseek), (long int) fp, 0, SEEK_CUR);
 
   return ret;
 } /* ftell */
@@ -267,7 +276,7 @@ fread (void *ptr, /**< address of buffer to read to */
 
   do
   {
-    ret = syscall_3 (__NR_read,
+    ret = syscall_3 (SYSCALL_NO (read),
                      (long int) stream,
                      (long int) ((uint8_t *) ptr + bytes_read),
                      (long int) (size * nmemb - bytes_read));
@@ -299,7 +308,7 @@ fwrite (const void *ptr, /**< data to write */
 
   do
   {
-    long int ret = syscall_3 (__NR_write,
+    long int ret = syscall_3 (SYSCALL_NO (write),
                               (long int) stream,
                               (long int) ((uint8_t *) ptr + bytes_written),
                               (long int) (size * nmemb - bytes_written));
@@ -320,7 +329,7 @@ int
 gettimeofday (void *tp,  /**< struct timeval */
               void *tzp) /**< struct timezone */
 {
-  return (int) syscall_2 (__NR_gettimeofday, (long int) tp, (long int) tzp);
+  return (int) syscall_2 (SYSCALL_NO (gettimeofday), (long int) tp, (long int) tzp);
 } /* gettimeofday */
 
 // FIXME
@@ -347,16 +356,16 @@ jrt_set_mem_limits (size_t data_size, /**< limit for data + bss + brk heap */
   long int ret;
 
 #ifdef __TARGET_HOST_x64
-  ret = syscall_2 (__NR_setrlimit, RLIMIT_DATA, (intptr_t) &data_limit);
+  ret = syscall_2 (SYSCALL_NO (setrlimit), RLIMIT_DATA, (intptr_t) &data_limit);
   assert (ret == 0);
 
-  ret = syscall_2 (__NR_setrlimit, RLIMIT_STACK, (intptr_t) &stack_limit);
+  ret = syscall_2 (SYSCALL_NO (setrlimit), RLIMIT_STACK, (intptr_t) &stack_limit);
   assert (ret == 0);
 #elif defined (__TARGET_HOST_ARMv7)
-  ret = syscall_3 (__NR_prlimit64, 0, RLIMIT_DATA, (intptr_t) &data_limit);
+  ret = syscall_3 (SYSCALL_NO (prlimit64), 0, RLIMIT_DATA, (intptr_t) &data_limit);
   assert (ret == 0);
 
-  ret = syscall_3 (__NR_prlimit64, 0, RLIMIT_STACK, (intptr_t) &stack_limit);
+  ret = syscall_3 (SYSCALL_NO (prlimit64), 0, RLIMIT_STACK, (intptr_t) &stack_limit);
   assert (ret == 0);
 #elif defined (__TARGET_HOST_x86)
 # error "__TARGET_HOST_x86 case is not implemented"