d38ab71140
Although both jerry-libc and jerry-libm have configuration options that enable/disable their build, in practice, only jerry-libc can be replaced with the system (compiler-default) libc. If jerry-libm is disabled, the build of jerry-main fails, as there is no way to instruct the linker to link the system libm to the binary. (The build system does have a way to pass flags to the linker, but those flags are listed before the linked objects. For the references to get resolved correctly, the libraries to be linked have to be specified _after_ the objects.) This patch adds the EXTERNAL_LINK_LIBS configuration option to CMakeLists, which ensures that the specified libraries get correctly passed to the linker. (E.g, replacing jerry-libm with system libm becomes possible with `JERRY_LIBM=OFF EXTERNAL_LINK_LIBS='-lm'`.) Additionally, the patch also makes the following related changes: * Removes the COMPILER_DEFAULT_LIBC configuration option, as it is (almost) always the opposite of JERRY_LIBC. Moreover, its name is misleading: its only role is to add `-nostdlib` to the linker flags. * Makes use of transitive library dependencies: if a library has another library as dependency, and it is linked to a binary, its dependency is linked as well. Thus, jerry-libc, jerry-libm, and any external libraries are added to jerry-core as dependency, and then only jerry-core is linked to executables (cmake will take care of the rest). * build.py and run-tests.py follow up the changes, along with some minor syntax changes. * Moves static linking option to global CMakeLists, as unit test binaries should be linked the same way as jerry-main. * Adds EXTERNAL_COMPILER_FLAGS and EXTERNAL_LINKER_FLAGS as last to the flag list, to allow user override of (nearly) anything. The patch speculatively follows up the build system changes in the mbed, riot-stm32f4, and zephyr targets. JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu
JerryScript: JavaScript engine for the Internet of Things
JerryScript is a lightweight JavaScript engine for resource-constrained devices such as microcontrollers. It can run on devices with less than 64 KB of RAM and less than 200 KB of flash memory.
Key characteristics of JerryScript:
- Full ECMAScript 5.1 standard compliance
- 160K binary size when compiled for ARM Thumb-2
- Heavily optimized for low memory consumption
- Written in C99 for maximum portability
- Snapshot support for precompiling JavaScript source code to byte code
- Mature C API, easy to embed in applications
Additional information can be found on our project page and Wiki.
IRC channel: #jerryscript on freenode
Mailing list: jerryscript-dev@gna.org, you can subscribe here and access the mailing list archive here.
Quick Start
Getting the sources
git clone https://github.com/Samsung/jerryscript.git
cd jerryscript
Building JerryScript
python tools/build.py
For additional information see Getting Started.
Documentation
License
JerryScript is Open Source software under the Apache License 2.0. Complete license and copyright information can be found in the source code.
Copyright 2015 Samsung Electronics Co., Ltd.
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.