Error -> bash: ./emcc . . .

[João Carlos]

I installed Emscripten on Linux Debian 10 and followed the installation step by step according to the link.

But when I run the command (./emcc -v) to see the version I get the following message in the terminal ( bash: ./emcc: No such file or directory ) ?

I also did the environment test by hanging around the command in the terminal ( ./emcc --check ) and I get the following message ( bash: ./emcc: No such file or directory ) ?

I tried to make a compilation using the command ( emcc test -o test.html ) compiling only the file ( test.wasm ) and generating the error in the terminal:

error: undefined symbol: htons (referenced by $inetPton6__deps: ['htons','$jstoi_q'], referenced by $writeSockaddr__deps: ['$Sockets','$inetPton4','$inetPton6','$zeroMemory'], referenced by __syscall_recvfrom__deps: ['$getSocketFromFD','$writeSockaddr','$DNS','$SYSCALLS'], referenced by top-level compiled C/C++ code)
warning: To disable errors for undefined symbols use `-sERROR_ON_UNDEFINED_SYMBOLS=0`
warning: _htons may need to be added to EXPORTED_FUNCTIONS if it arrives from a system library
error: undefined symbol: ntohs (referenced by $inetNtop6__deps: ['$inetNtop4','ntohs'], referenced by $readSockaddr__deps: ['$Sockets','$inetNtop4','$inetNtop6','ntohs'], referenced by $getSocketAddress__deps: ['$readSockaddr','$FS','$DNS'], referenced by __syscall_sendto__deps: ['$getSocketFromFD','$getSocketAddress','$SYSCALLS'], referenced by top-level compiled C/C++ code)
warning: _ntohs may need to be added to EXPORTED_FUNCTIONS if it arrives from a system library
Error: Aborting compilation due to previous errors
emcc: error: '/home/aguiar/emsdk/node/14.18.2_64bit/bin/node /home/aguiar/emsdk/upstream/emscripten/src/compiler.js /tmp/tmptufh6kbr.json' failed (returned 1)

How can I solve ?

[Sam Clegg]

On Fri, Nov 11, 2022 at 5:13 PM João Carlos <jocm....@gmail.com> wrote:

I installed Emscripten on Linux Debian 10 and followed the installation step by step according to the link.

But when I run the command (./emcc -v) to see the version I get the following message in the terminal ( bash: ./emcc: No such file or directory ) ?

I also did the environment test by hanging around the command in the terminal ( ./emcc --check ) and I get the following message ( bash: ./emcc: No such file or directory ) ?

The commands that start with `./` are designed to be run from the emscripten directory itself.   If you use emcc or otherwise have emcc in your PATH then you can/should just type `emcc --check` (without the leading `./`).

 

I tried to make a compilation using the command ( emcc test -o test.html ) compiling only the file ( test.wasm ) and generating the error in the terminal:

error: undefined symbol: htons (referenced by $inetPton6__deps: ['htons','$jstoi_q'], referenced by $writeSockaddr__deps: ['$Sockets','$inetPton4','$inetPton6','$zeroMemory'], referenced by __syscall_recvfrom__deps: ['$getSocketFromFD','$writeSockaddr','$DNS','$SYSCALLS'], referenced by top-level compiled C/C++ code)
warning: To disable errors for undefined symbols use `-sERROR_ON_UNDEFINED_SYMBOLS=0`
warning: _htons may need to be added to EXPORTED_FUNCTIONS if it arrives from a system library
error: undefined symbol: ntohs (referenced by $inetNtop6__deps: ['$inetNtop4','ntohs'], referenced by $readSockaddr__deps: ['$Sockets','$inetNtop4','$inetNtop6','ntohs'], referenced by $getSocketAddress__deps: ['$readSockaddr','$FS','$DNS'], referenced by __syscall_sendto__deps: ['$getSocketFromFD','$getSocketAddress','$SYSCALLS'], referenced by top-level compiled C/C++ code)
warning: _ntohs may need to be added to EXPORTED_FUNCTIONS if it arrives from a system library
Error: Aborting compilation due to previous errors
emcc: error: '/home/aguiar/emsdk/node/14.18.2_64bit/bin/node /home/aguiar/emsdk/upstream/emscripten/src/compiler.js /tmp/tmptufh6kbr.json' failed (returned 1)

How can I solve ?

This could be a dependency issue with our system libraries, but its hard to tell from the information you have provided. 

In the `emcc test -o test.html` command you mention what is `test`?  Is it a source file or an object file?    Can you share the source code?

cheers,

sam

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[João Carlos]

-o test.html -> Specifies that we want Emscripten to generate an HTML page to run our code in (and a filename to use), as well as the wasm module and the JavaScript "glue" code to compile and instantiate the wasm so it can be used in the web environment.