Turn modified fdlibm into Jerry's own libm

* Rename modified fdlibm to jerry-libm
  * Move third-party/fdlibm to jerry-libm
  * Rename original fdlibm.h to jerry-libm-internal.h
    * And remove it from the public headers.
  * Rename jerry-libm's public header to math.h
    * This also makes jerry-core sources include `<math.h>`. Therefore,
      should anyone want to use a different libm implementation with
      jerry, it becomes possible. (The same way as we provide a minimal
      libc with standard headers, but should it be insufficient or
      conflicting for someone, it can be replaced.)
  * Drop `s_` prefix from jerry-libm sources
    * The original fdlibm implementation had various prefixes (e.g., `k_`
      for sources of kernel routines, and `w_` for wrapper routines), but
      after the specialization of fdlibm to jerry, only `s_` remained.
      Since it does not encode anything anymore, it can be dropped.
  * Stylistic edits to jerry-libm's CMakeLists
    * Align project name with other CMakeLists in the code base
  * Move Jerry-LibM under Apache License
    * Using the same approach as was used by linux-wireless when ath5k
      driver license needed clarification. Solution was proposed by SFLC.
      External mail for future reference: http://lwn.net/Articles/247806/

* Tests & checks
  * Remove FD from the name of libm unit test-related files
  * Make vera++ and cppcheck check jerry-libm

* Targets
  * Speculative update of targets to use jerry-libm

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

jerry-core/CMakeLists.txt

@@ -225,7 +225,7 @@ project (JerryCore C ASM)
                 PROPERTY COMPILE_FLAGS "${COMPILE_FLAGS_JERRY} ${C_FLAGS_JERRY} ${FLAGS_COMMON_${BUILD_MODE}}")
    target_compile_definitions(${TARGET_NAME}.jerry-core PRIVATE ${DEFINES_JERRY})
    target_include_directories(${TARGET_NAME}.jerry-core PRIVATE ${INCLUDE_CORE})
-   target_include_directories(${TARGET_NAME}.jerry-core PRIVATE ${INCLUDE_FDLIBM})
+   target_include_directories(${TARGET_NAME}.jerry-core PRIVATE ${INCLUDE_LIBM})
    target_include_directories(${TARGET_NAME}.jerry-core SYSTEM PRIVATE ${INCLUDE_LIBC_INTERFACE})
    target_include_directories(${TARGET_NAME}.jerry-core SYSTEM PRIVATE ${INCLUDE_EXTERNAL_LIBS_INTERFACE})
 

jerry-core/ecma/builtin-objects/ecma-builtin-date-prototype.c

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include <math.h>
+
 #include "ecma-alloc.h"
 #include "ecma-builtin-helpers.h"
 #include "ecma-exceptions.h"
@@ -22,7 +24,6 @@
 #include "ecma-helpers.h"
 #include "ecma-objects.h"
 #include "ecma-try-catch-macro.h"
-#include "fdlibm-math.h"
 
 #ifndef CONFIG_ECMA_COMPACT_PROFILE_DISABLE_DATE_BUILTIN
 

jerry-core/ecma/builtin-objects/ecma-builtin-helpers-date.c

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include <math.h>
+
 #include "ecma-alloc.h"
 #include "ecma-builtin-helpers.h"
 #include "ecma-exceptions.h"
@@ -21,7 +23,6 @@
 #include "ecma-helpers.h"
 #include "ecma-objects.h"
 #include "ecma-try-catch-macro.h"
-#include "fdlibm-math.h"
 #include "lit-char-helpers.h"
 
 #ifndef CONFIG_ECMA_COMPACT_PROFILE_DISABLE_DATE_BUILTIN

jerry-core/ecma/builtin-objects/ecma-builtin-math.c

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include <math.h>
+
 #include "ecma-alloc.h"
 #include "ecma-builtins.h"
 #include "ecma-conversion.h"
@@ -25,7 +27,6 @@
 #include "ecma-objects.h"
 #include "ecma-objects-general.h"
 #include "ecma-try-catch-macro.h"
-#include "fdlibm-math.h"
 #include "jrt.h"
 #include "jrt-libc-includes.h"
 

jerry-core/ecma/builtin-objects/ecma-builtin-number-prototype.c

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include <math.h>
+
 #include "ecma-alloc.h"
 #include "ecma-builtins.h"
 #include "ecma-conversion.h"
@@ -24,7 +26,6 @@
 #include "ecma-objects.h"
 #include "ecma-string-object.h"
 #include "ecma-try-catch-macro.h"
-#include "fdlibm-math.h"
 #include "jrt.h"
 #include "jrt-libc-includes.h"