Tried to add to the `cc_toolchain_config.bzl` the missing include dir as
`-isystem` flag,
Now i get this:
cache:INFO: generating system library: libc-extras.bc... (this will be
cached in "/home/tsvi/.emscripten_cache/asmjs/libc-extras.bc" for
subsequent builds)
Traceback (most recent call last):
File "external/emscripten_toolchain/emcc.py", line 3308, in <module>
sys.exit(run(sys.argv))
File "external/emscripten_toolchain/emcc.py", line 1776, in run
extra_files_to_link += system_libs.calculate([f for _, f in
sorted(temp_files)] + extra_files_to_link, in_temp, stdout_=None,
stderr_=None, forced=forced_stdlibs)
File
"/home/tsvi/.cache/bazel/_bazel_tsvi/9194043dbd55a599c9568f5a8b5663c8/external/emscripten_toolchain/tools/system_libs.py",
line 757, in calculate
add_library(lib)
File
"/home/tsvi/.cache/bazel/_bazel_tsvi/9194043dbd55a599c9568f5a8b5663c8/external/emscripten_toolchain/tools/system_libs.py",
line 718, in add_library
libfile = shared.Cache.get(name, do_create)
File
"/home/tsvi/.cache/bazel/_bazel_tsvi/9194043dbd55a599c9568f5a8b5663c8/external/emscripten_toolchain/tools/cache.py",
line 135, in get
shutil.copyfile(temp, cachename)
File "/usr/lib/python2.7/shutil.py", line 97, in copyfile
with open(dst, 'wb') as fdst:
IOError: [Errno 30] Read-only file system:
'/home/tsvi/.emscripten_cache/asmjs/libc-extras.bc'
Target //:helloworld.js failed to build
Use --verbose_failures to see the command lines of failed build steps.
On Mon, May 20, 2019 at 2:26 PM Tsvi Sabo <[email protected]> wrote:
> An update in case anyone was looking into it,
> `cxx` changed to `c++` and `wasm-libc` to `libc-wasm` so a correct way to
> run the script now is:
>
> `python embuilder.py build dlmalloc libc++ libc gl libc++abi
> libc++_noexcept libc-wasm`
>
>
>
>
>
> On Mon, May 20, 2019 at 2:05 PM Tsvi Sabo <[email protected]> wrote:
>
>> I think i might have a hint for how to solve it,
>> I am missing some standard library files, and there's a way to generate
>> those running:
>> "python embuilder.py build dlmalloc libcxx libc gl libcxxabi
>> libcxx_noexcept wasm-libc"
>> from `external/emscripten_toolchain`
>> but when i do that, i get:
>>
>> embuilder:INFO: building and verifying dlmalloc
>> embuilder:INFO: ...success
>> embuilder:INFO: building and verifying libcxx
>> embuilder:ERROR: unfamiliar build target: libcxx
>>
>> Any idea?
>>
>> On Mon, May 20, 2019 at 12:55 PM Tsvi Sabo <[email protected]> wrote:
>>
>>> Thanks a lot for your reply, will try it, but the reason i was using the
>>> Bazel to pull and build emscripten rather than installing
>>> the SDK is that i would like to have a Bazel target which i can build
>>> with emscripten on any platform,
>>> you think that's possible?
>>>
>>> On Mon, May 20, 2019 at 12:39 PM Floh <[email protected]> wrote:
>>>
>>>> Wow, that looks overly complicated (I guess that's Bazel's fault).
>>>>
>>>> If you are on a Mac, the easiest way to get a working emscripten
>>>> environment is via homebrew:
>>>>
>>>> > brew install emscripten
>>>>
>>>> On Linux, check whether the emscripten SDK is provided by your distro's
>>>> package manager, otherwise (or if on Windows), follow the steps described
>>>> here to install the emscripten SDK:
>>>>
>>>> https://emscripten.org/docs/getting_started/downloads.html
>>>>
>>>> ...and to test whether this worked, write a small hello.c:
>>>>
>>>> #include <stdio.h>
>>>> int main() {
>>>> printf("Hello World!\n");
>>>> return 0;
>>>> }
>>>>
>>>> ...then run:
>>>>
>>>> > emcc hello.c -o hello.html
>>>> ...
>>>>
>>>> ..this should produce 3 files: hello.html, hello.js and hello.wasm
>>>>
>>>> ...to test whether the produced application works:
>>>>
>>>> > emrun hello.html
>>>> Starting browser: open http://localhost:6931/hello.html
>>>> ...
>>>>
>>>> ...this should open the system's default browser and show the
>>>> emscripten standard demo page, at the bottom of the page there should be a
>>>> "Hello World!" message in a text output field.
>>>>
>>>> From there, move to more complex stuff. But I would move to build
>>>> systems only when you're sure that the emscripten installation itself
>>>> works.
>>>>
>>>> Build systems just add more things that can go wrong, and the
>>>> additional "obfuscation layer" (which the build systems add on top of the
>>>> compiler toolchain) can make it harder to find the actual problems.
>>>>
>>>> Cheers,
>>>> -Floh.
>>>>
>>>> On Monday, 20 May 2019 11:01:32 UTC+2, Tsvi Sabo wrote:
>>>>>
>>>>> Following this tutorial:
>>>>>
>>>>> https://docs.bazel.build/versions/master/tutorial/cc-toolchain-config.html
>>>>> And after fixing some of the configuration's paths,
>>>>> i manage to build a really simple `hello-world` `c` file, but when i
>>>>> follow the example completely, and include some cpp headers such as
>>>>> <ctime>, i get the following:
>>>>>
>>>>> "In file included from /home/tsvi/IOTA_DEV/entangled/hello-world.cc:2:
>>>>> In file included from
>>>>> external/emscripten_toolchain/system/include/libcxx/iostream:38:
>>>>> In file included from
>>>>> external/emscripten_toolchain/system/include/libcxx/ios:216:
>>>>> external/emscripten_toolchain/system/include/libcxx/__locale:417:32:
>>>>> error: use of undeclared identifier '_CTYPE_S'
>>>>> static const mask space = _CTYPE_S;"
>>>>>
>>>>>
>>>>> So, i am guessing, it might be using wrong include paths of clang
>>>>> after all?
>>>>> How do i fix this?
>>>>> Thanks
>>>>>
>>>> --
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>>>> .
>>>> For more options, visit https://groups.google.com/d/optout.
>>>>
>>>
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