linker-errors

问题 Undefined symbols for architecture arm64: "_OBJC_CLASS_$_Twitter", referenced from: objc-class-ref in FirebaseTwitterAuthUI(FUITwitterAuth.o) ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation) I am having that error when I want to build the project. Any idea how to fix this? 回答1: Error Explanation : The error suggests that the compiler could not able to find the Twitter class while building the FirebaseTwitterAuthUI

问题 This question already has answers here : What is an undefined reference/unresolved external symbol error and how do I fix it? (32 answers) Why can templates only be implemented in the header file? (16 answers) Why do I get “unresolved external symbol” errors when using templates? [duplicate] (3 answers) Closed 6 years ago . I have written a template class, for a map/dictionary data structure, and keep getting this strange error (ERROR LNK2019:unresolved external symbol) Code: AssArray.h:

问题 I am creating an R package 'lapacker' to provide the C interface for internal LAPACK library provided and used by R (with double precision and double complex only) using the R API header file "R_ext/Lapack.h". The source code: https://github.com/ypan1988/lapacker/ And the project structure: /lapacker /inst /include /lapacke.h /someother header files /R /zzz.R /src /lapacke_dgetrf.c /lapacke_dgetrf_work.c /loads of other utility functions provided by LAPACKE /rcpp_hello.cpp DESCRIPTION

问题 I want to use DRAMSim2 as library interface in a developing PINtool. I try to be familiar with dramsim_test.cpp that includes dramsim_test.h, that includes DRAMSim.h (in a specific directory). If i put these files in the directory of my PINtool an include them (except .cpp. for this i use the code in the PINtool) i get a linker (i suppose) error: undefined symbol: _ZN7DRAMSim23getMemorySystemInstanceERKSsS1_S1_S1_jPSs The PINtool has a config file that writes these: ## Libraries to link ifeq

问题 I'm trying to call static method from my TEST, but I'm getting unresolved external symbol. What I've done so far: Created 3 projects: GoogleTest project as a static library - compiled gtest-all.cc and gtest_main.cc MyProject - where I keep my .h and .cpp files UnitTest project - where I keep tests I've set up UnitTest's additional directories, lib directories, and referenced GoogleTest and MyProject. Tests run fine until I call static method from one of my classes... Linker options: /OUT:"D:

问题 What are undefined reference/unresolved external symbol errors? What are common causes and how to fix/prevent them? Feel free to edit/add your own. 回答1: Compiling a C++ program takes place in several steps, as specified by 2.2 (credits to Keith Thompson for the reference): The precedence among the syntax rules of translation is specified by the following phases [see footnote] . Physical source file characters are mapped, in an implementation-defined manner, to the basic source character set

问题 I'm building CMake 3.12.4 from the release tarball on AIX. CMake is failing to link on the machine: ld: 0711-781 ERROR: TOC overflow. TOC size: 65632 Maximum size: 65536 The error is detailed in the IBM technotes at ld: 0711-781 ERROR: TOC overflow. I want to add -bbigtoc linker option for the cmake recipe. CMake's bootstrap does not appear to accept linker options for LDFLAGS as shown below. How do I add a linker flag to the bootstrap process? Here are the options CMake bootstrap accepts: $

问题 I'm looking to give the 'Go' programming language a try but I'm having trouble getting even a simple test example to work. I think it's probably an issue with the port so I've submitted a ticket under issues in gomingw project page. What steps will reproduce the problem? Create any simple go test program compile it with 8g. ie. 8g hello.go link it with 8l. ie. 8l hello.8 What is the expected output? What do you see instead? I expect 8l to link successfully with no errors. Instead I see the

问题 I'm strugling to compile a really small example with V8.. cpp program is this: #include "v8.h" int main() { v8::HandleScope handle_scope; return 0; } Compile line: g++ -I/home/lterje/git/tengine/Externals/v8/include /home/lterje/git/tengine/Externals/v8/out/ia32.release/obj.target/tools/gyp/libv8_snapshot.a test.cpp -o test -lpthread Error I'm getting: /tmp/ccHYtJuE.o: In function `main': test.cpp:(.text+0x11): undefined reference to `v8::HandleScope::HandleScope()' test.cpp:(.text+0x22):

问题 I have a Yocto BSP with my own layer that includes an autotools 3rdy part library (libcoap). My application ".bb" file has the following lines, telling libcoap is needed: DEPENDS += "libcoap" RDEPENDDS_${PN} += " libcoap libcoap-dev libcoap-devstatic" I can see the library files are being copied to sysroot: $ ls -l /projects/oe-core/build/tmp-glibc/work/armv7at2hf-neon-angstrom-linux-gnueabi/coap-playground/1.0-r0/recipe-sysroot/usr/lib/libcoap* -rw-r--r-- 2 udev udev 286430 Ago 21 13:53