Thanks Ryan, I'll test it and let you know.
Regards,
Fran
El jun 14, 2015 3:21 PM, "Ryan Phillips" <[email protected]> escribió:
> Hi Fran,
>
> It appears you are linking the shared object to the executable. If you do
> this, then the symbols are within the ffi.C. namespace, and you should not
> need to ffi.load the shared object.
>
> -Ryan
>
> On Fri, Jun 12, 2015, at 11:20 PM, Francisco D' Agostino wrote:
>
> Guys,
> I'm using luajit as a shared library (libluajit.so) embedded in an C++ app.
> I've a shared library provided by a third party vendor (libctosapi.so)
> when trying to call a C function in this library from LUA using ffy I get
> 'undefined symbol'.
> Any kind of help is appreciated!
>
> *LUA Script (script.lua)*
>
> local ffi = require("ffi")
>
> ffi.cdef[[
> unsigned short CTOS_PrinterPutString(unsigned char* baBuf);
> ]]
>
> local ctosapi = ffi.load("ctosapi")
>
> x = 0
> for i = 1, #foo do
> x = x + foo[i]
> ctosapi.CTOS_PrinterPutString("Test")
> end
>
> return x
>
> *C++ Main*
> int main(int argc,char *argv[])
> {
> BYTE key;
>
> CTOS_LCDTClearDisplay();
>
> int status, result, i;
> double sum;
> lua_State *L;
>
> L = luaL_newstate();
>
> luaL_openlibs(L); /* Load Lua libraries */
>
> status = luaL_loadfile(L, "script.lua");
> if (status) {
> /* If something went wrong, error message is at the top of */
> /* the stack */
> fprintf(stderr, "Couldn't load file: %s\n", lua_tostring(L, -1));
> exit(1);
> }
>
> lua_newtable(L); /* We will pass a table */
>
> for (i = 1; i <= 5; i++) {
> lua_pushnumber(L, i); /* Push the table index */
> lua_pushnumber(L, i*2); /* Push the cell value */
> lua_rawset(L, -3); /* Stores the pair in the table */
> }
>
> lua_setglobal(L, "foo");
>
> result = lua_pcall(L, 0, LUA_MULTRET, 0);
> if (result) {
> fprintf(stderr, "Failed to run script: %s\n", lua_tostring(L, -1));
> ABI_PrinterPutString((UCHAR *)lua_tostring(L, -1));
> exit(1);
> }
>
> sum = lua_tonumber(L, -1);
>
> if (sum == 30)
> ABI_PrinterPutString((UCHAR *)"SUCCESS!!!");
>
> lua_pop(L, 1); /* Take the returned value out of the stack */
> lua_close(L); /* Cya, Lua */
>
> CTOS_KBDGet(&key);
>
> exit(0);
> }
>
>
> *Compile/Linker Output*
>
> "/usr/bin/make" -f nbproject/Makefile-Release.mk QMAKE= SUBPROJECTS=
> .clean-conf
> make[1]: Entering directory `/cygdrive/c/dev/abidea/V8_TEST_VS5'
> rm -f -r build/Release
> rm -f dist/V5S/App/V8_TEST_VS5.exe
> make[1]: Leaving directory `/cygdrive/c/dev/abidea/V8_TEST_VS5'
>
>
> CLEAN SUCCESSFUL (total time: 670ms)
>
> "/usr/bin/make" -f nbproject/Makefile-Release.mk QMAKE= SUBPROJECTS=
> .build-conf
> make[1]: Entering directory `/cygdrive/c/dev/abidea/V8_TEST_VS5'
> "/usr/bin/make" -f nbproject/Makefile-Release.mk
> dist/V5S/App/V8_TEST_VS5.exe
> make[2]: Entering directory `/cygdrive/c/dev/abidea/V8_TEST_VS5'
> mkdir -p build/Release/Gnueabi-Windows
> arm-brcm-linux-gnueabi-g++ "-IC:\Program Files
> (x86)\Castles\VEGA5000S\include" -fsigned-char -Wundef -Wno-trigraphs
> -Wimplicit -Wformat -c -O2 -I/cygdrive/C/Program\ Files\
> \(x86\)/Castles/VEGA5000S/include -o
> build/Release/Gnueabi-Windows/appmain.o appmain.cpp
> mkdir -p dist/V5S/App
> arm-brcm-linux-gnueabi-g++ -L . "-LC:\Program Files
> (x86)\Castles\VEGA5000S\lib" "-LC:\Program Files
> (x86)\Castles\VEGA5000S\lib_not_builtin" -o dist/V5S/App/V8_TEST_VS5
> build/Release/Gnueabi-Windows/appmain.o -lcaethernet -lcafont -lcafs
> -lcakms -lcalcd -lcamodem -lcapmodem -lcaprt -lcartc -lcauart -lcauldpm
> -lcausbh -lcagsm -lcabarcode -lpthread -ldl -lcaclvw -lcatls -lctosapi
> -lcrypto -lcurl -lssl -lz -lfreetype -lluajit
> make[2]: Leaving directory `/cygdrive/c/dev/abidea/V8_TEST_VS5'
> make[1]: Leaving directory `/cygdrive/c/dev/abidea/V8_TEST_VS5'
>
>
> BUILD SUCCESSFUL (total time: 2s)
>
> *Execution Output*
> script.lua:16: /usr/lib/libctosapi.so: undefined symbol :
> CTOS_PrinterPutString.
>
> Regards,
> Fran
>
>
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