Linking problems using libcurl with Visual C++ 2005: "unresolved external symbol __imp__curl_easy_se
- by user88595
Hi,
I am planning to use libcurl in my project. I had downloaded the library source,built and integrated it in a small POC application. I am able to build and run the application without any issues with the generated libcurl.dll and libcurl_imp.lib files. Now when I integrate the same library in my project I am getting linker errors.
6foo.obj : error LNK2001: unresolved external symbol _imp_curl_easy_setopt
6foo.obj : error LNK2001: unresolved external symbol _imp_curl_easy_perform
6foo.obj : error LNK2001: unresolved external symbol _imp_curl_easy_cleanup
6foo.obj : error LNK2001: unresolved external symbol _imp_curl_global_init
6foo.obj : error LNK2001: unresolved external symbol _imp_curl_easy_init
I have researched and tried all manners of workarounds like adding CURL_STATICLIB definitions , additional libraries , changing to /MT even copying the libs to the release directory but nothing seems to work. As far as I can see the only difference between approach #1 and #2 in my steps are #1 is an console application using the libcurl.dll while in my main project this is another dll which is trying to link to libcurl.dll.. Would that necessitate any change in approach? Can I use the same generated multi threaded DLL /MD file for both(Tried /MT also with no success)? Any other ideas?
Following are the linker options.
-------------------------------------------------Working-------------------------------------------------
/OUT:"C:\SampleFTP\Release\SampleFTP.exe" /INCREMENTAL:NO /NOLOGO
/LIBPATH:"C:\SampleFTP\SampleFTP\Release"
/MANIFEST /MANIFESTFILE:"Release\SampleFTP.exe.intermediate.manifest"
/DEBUG /PDB:"c:\SampleFTP\release\SampleFTP.pdb"
/SUBSYSTEM:CONSOLE
/OPT:REF /OPT:ICF /LTCG
/MACHINE:X86
/ERRORREPORT:PROMPT
libcurl_imp.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib
-------------------------------------------------Working-------------------------------------------------
----------------------------------------------NotWorking-------------------------------------------------
/OUT:".......\nt\Win32\Release/foo__tests.dll" /INCREMENTAL:NO /NOLOGO
/LIBPATH:"C:\FullLibPath\libcurl_libs"
/LIBPATH:"......\nt\Win32\Release"
/DLL
/MANIFEST /MANIFESTFILE:".\foo_tests\Win32\Release\foo_tests.dll.intermediate.manifest" /DEBUG /PDB:".......\nt\Win32\Release/foo_tests.pdb"
/OPT:REF /OPT:ICF /LTCG
/IMPLIB:".......\nt\Win32\Release/foo_tests.lib"
/MACHINE:X86
/ERRORREPORT:PROMPT
odbc32.lib odbccp32.lib util_process.lib wsock32.lib Version.lib libcurl_imp.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib
"......\nt\win32\release\otherlib1.lib"
"......\nt\win32\release\otherlib2.lib"
----------------------------------------------NotWorking-------------------------------------------------
