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我正在阅读 emscripten 的教程 - 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当地设置了我的 .emscripten 设置文件。

以下是设置:

# 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,当我使用以下命令在测试目录中的测试程序中运行 emcc 时:

./emcc tests/hello_world.cpp

我收到错误消息:

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

我无法理解为什么会发生此错误。

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1 回答 1

3

您可能正在使用 3.0 之前的 clang 版本。

要检查您的版本,请运行:

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。

于 2012-04-15T18:49:45.317 回答