emscripten - 错误 : unknown argument: '-nostdsysteminc' in Emscripten

Question

我正在阅读这里的 emscripten 教程 - https://github.com/kripken/emscripten/wiki/Tutorial

到目前为止，我已经下载了源代码并安装了依赖项并适本地设置了我的 .emscripten 设置文件。

设置如下:

# This file will be copied to ~/.emscripten if that file doesn't exist. Or, this is     that copy.
# IMPORTANT: Edit the *copy* with the right paths!

#EMSCRIPTEN_ROOT = os.path.expanduser('~/Dev/emscripten') # this helps projects using emscripten find it
EMSCRIPTEN_ROOT = os.path.expanduser('~/softwares/kripken-emscripten-12e45ea')

#LLVM_ROOT = os.path.expanduser('~/Dev/llvm-3.0/cbuild/bin')
LLVM_ROOT = os.path.expanduser('/usr/bin')

# See below for notes on which JS engine(s) you need
NODE_JS = 'node'
SPIDERMONKEY_ENGINE = [os.path.expanduser('~/Dev/mozilla-central/js/src/js'), '-m', '-n']
V8_ENGINE = os.path.expanduser('~/Dev/v8/d8')

TEMP_DIR = '/tmp'


########################################################################################################


# Pick the JS engine to use for running the compiler. This engine must exist, or
# nothing can be compiled.
#
# Recommendation: If you already have node installed, use that. Otherwise, build v8 or
#                 spidermonkey from source. Any of these three is fine, as long as it's
#                 a recent version (especially for v8 and spidermonkey).

COMPILER_ENGINE = NODE_JS
#COMPILER_ENGINE = V8_ENGINE
#COMPILER_ENGINE = SPIDERMONKEY_ENGINE


# All JS engines to use when running the automatic tests. Not all the engines in this list
# must exist (if they don't, they will be skipped in the test runner).
#
# Recommendation: If you already have node installed, use that. If you can, also build
#                 spidermonkey from source as well to get more test coverage (node can't
#                 run all the tests due to node issue 1669). v8 is currently not recommended
#                 here because of v8 issue 1822.

JS_ENGINES = [NODE_JS, SPIDERMONKEY_ENGINE]

但是当我在测试目录中的测试程序中使用以下命令运行 emcc 时:

./emcc tests/hello_world.cpp

我收到错误:

error: unknown argument: '-nostdsysteminc'
emcc: compiler frontend failed to generate LLVM bitcode, halting

我无法理解为什么会出现此错误。

Answer 1

您可能使用的是 3.0 之前的 clang 版本。

要检查你的版本，运行:

clang --version

我发现我的版本是 2.8，因为我是在 Ubuntu 11.04 上通过 apt-get 安装的；一旦我更新到 clang 3.0，这个错误就消失了。