Error: My function "is not a function .."

[AZXSH]

I am very new to emscripten.. I have a .cpp code and I want to convert it to .js and it went well. However when I called the function directly using _sameName of the original .cpp file it shows that there is no function with such name.

I am using eclipse and node.js

please advise me...

[kripken]

What specific command did you run? For example, optimizations might change things. Or dead code removal might remove a function that looks unused. See this faq entry.

[AZXSH]

It shows the below error..

C:\Program Files\Emscripten\emscripten\1.35.0>emcc lea_ref.cpp -o lea.js -s EXPORTED_FUNCTIONS="['_LEA_Keyschedule', '_LEA_EncryptBlk', '_LEA_DecryptBlk']" In file included from lea_ref.cpp:27: ./lea_ref.h:69:6: error: variable has incomplete type 'void' void EMSCRIPTEN_KEEPALIVE LEA_Keyschedule(u32 pdRndKeys[LEA_NUM_RNDS][LEA_RNDKEY_WORD_LEN], ^ ./lea_ref.h:69:26: error: expected ';' after top level declarator void EMSCRIPTEN_KEEPALIVE LEA_Keyschedule(u32 pdRndKeys[LEA_NUM_RNDS][LEA_RNDKEY_WORD_LEN], ^ ; ./lea_ref.h:78:6: error: variable has incomplete type 'void' void EMSCRIPTEN_KEEPALIVE LEA_EncryptBlk(u8 pbDst[LEA_BLK_BYTE_LEN], ^ ./lea_ref.h:78:26: error: expected ';' after top level declarator void EMSCRIPTEN_KEEPALIVE LEA_EncryptBlk(u8 pbDst[LEA_BLK_BYTE_LEN], ^ ; ./lea_ref.h:88:6: error: variable has incomplete type 'void' void EMSCRIPTEN_KEEPALIVE LEA_DecryptBlk(u8 pbDst[LEA_BLK_BYTE_LEN], ^ ./lea_ref.h:88:26: error: expected ';' after top level declarator void EMSCRIPTEN_KEEPALIVE LEA_DecryptBlk(u8 pbDst[LEA_BLK_BYTE_LEN], ^ ; lea_ref.cpp:46:6: error: variable has incomplete type 'void' void EMSCRIPTEN_KEEPALIVE LEA_Keyschedule(u32 pdRndKeys[LEA_NUM_RNDS][LEA_RNDKEY_WORD_LEN], ^ lea_ref.cpp:46:26: error: expected ';' after top level declarator void EMSCRIPTEN_KEEPALIVE LEA_Keyschedule(u32 pdRndKeys[LEA_NUM_RNDS][LEA_RNDKEY_WORD_LEN], ^ ; 8 errors generated. ERROR:root:compiler frontend failed to generate LLVM bitcode, halting

C:\Program Files\Emscripten\emscripten\1.35.0>

On Mon, Oct 17, 2016 at 10:09 PM, Alon Zakai notifications@github.com wrote:

What specific command did you run? For example, optimizations might change things. Or dead code removal might remove a function that looks unused. See this faq entry http://kripken.github.io/emscripten-site/docs/getting_started/FAQ.html#why-do-functions-in-my-c-c-source-code-vanish-when-i-compile-to-javascript-and-or-i-get-no-functions-to-process .

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[juj]

That looks like it's missing the definition of EMSCRIPTEN_KEEPALIVE? Try #include <emscripten/emscripten.h> at the top of the file?

[AZXSH]

I added #include <emscripten/emscripten.h> at the top of the file but it still shows the below error ...

C:\Program Files\Emscripten\emscripten\1.35.0>emcc lea_ref.cpp -o lea.js -s EXPORTED_FUNCTIONS="['_LEA_Keyschedule', '_LEA_EncryptBlk', '_LEA_DecryptBlk']" WARNING:root:function requested to be exported, but not implemented: "_LEA_Keyschedule" WARNING:root:function requested to be exported, but not implemented: "_LEA_EncryptBlk" WARNING:root:function requested to be exported, but not implemented: "_LEA_DecryptBlk"

C:\Program Files\Emscripten\emscripten\1.35.0>

On Tue, Oct 18, 2016 at 1:25 PM, juj notifications@github.com wrote:

That looks like it's missing the definition of EMSCRIPTEN_KEEPALIVE? Try #include <emscripten/emscripten.h> at the top of the file?

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[kripken]

Perhaps those functions need to be wrapped in extern "C"? You are exporting them using the C name, but they are in a C++ file.

Can also build the cpp to a .bc file and run llvm-nm on that, to see which symbols exist there.

[AZXSH]

I added the extern "C" to the .cpp code and it shows the following errors..

C:\Program Files\Emscripten\emscripten\1.35.0>emcc lea_ref.cpp -o lea.js -s EXPORTED_FUNCTIONS="['_LEA_Keyschedule', '_LEA_EncryptBlk', '_LEA_DecryptBlk']" lea_ref.cpp:48:27: error: declaration of 'LEA_Keyschedule' has a different language linkage void EMSCRIPTEN_KEEPALIVE LEA_Keyschedule(u32 pdRndKeys[LEA_NUM_RNDS][LEA_RNDKEY_WORD_LEN], ^ ./lea_ref.h:71:27: note: previous declaration is here void EMSCRIPTEN_KEEPALIVE LEA_Keyschedule(u32 pdRndKeys[LEA_NUM_RNDS][LEA_RNDKEY_WORD_LEN], ^ lea_ref.cpp:145:27: error: declaration of 'LEA_EncryptBlk' has a different language linkage void EMSCRIPTEN_KEEPALIVE LEA_EncryptBlk(u8 pbDst[LEA_BLK_BYTE_LEN], ^ ./lea_ref.h:80:27: note: previous declaration is here void EMSCRIPTEN_KEEPALIVE LEA_EncryptBlk(u8 pbDst[LEA_BLK_BYTE_LEN], ^ lea_ref.cpp:174:27: error: declaration of 'LEA_DecryptBlk' has a different language linkage void EMSCRIPTEN_KEEPALIVE LEA_DecryptBlk(u8 pbDst[LEA_BLK_BYTE_LEN], ^ ./lea_ref.h:90:27: note: previous declaration is here void EMSCRIPTEN_KEEPALIVE LEA_DecryptBlk(u8 pbDst[LEA_BLK_BYTE_LEN], ^ 3 errors generated. ERROR:root:compiler frontend failed to generate LLVM bitcode, halting

C:\Program Files\Emscripten\emscripten\1.35.0>

Is building .bc looks like this?

emcc lea_ref.cpp -o lea.bc -s EXPORTED_FUNCTIONS="['_LEA_Keyschedule', '_LEA_EncryptBlk', '_LEA_DecryptBlk']"

and how can I add the run llvm-nm to the previous commandline?

On Tue, Oct 18, 2016 at 9:35 PM, Alon Zakai notifications@github.com wrote:

Perhaps those functions need to be wrapped in extern "C"? You are exporting them using the C name, but they are in a C++ file.

Can also build the cpp to a .bc file and run llvm-nm on that, to see which symbols exist there.

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[kripken]

You need to edit the header too, I am guessing - the compiler doesn't like a function declared as extern C++ but then implemented as extern C. But I'm not sure, never seen that error before.

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