linker

问题 I am trying to compile my Visual C++ project (uses MFC) in Microsoft Visual Studio 2012, and it comes back with the following errors: error LNK2005: "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) already defined in LIBCMTD.lib(new.obj) error LNK2005: "void __cdecl operator delete(void *)" (??3@YAXPAX@Z) already defined in LIBCMTD.lib(dbgdel.obj) error LNK2005: "void __cdecl operator delete[](void *)" (??_V@YAXPAX@Z) already defined in LIBCMTD.lib(delete2.obj) error LNK1169: one or

问题 I have an iPhone SDK project that is supposed to build a static library for both the simulator and the ARM processor and then combine the two into a universal library. Heretofore, I was using iPhone SDK 3+ and accomplished this by creating a separate target for each, one simulator and one ARM, and then making a third target that combines them using a shell script. The deployment targets/build settings for each of the constituent targets are set to their respective architectures, etc. Also,

问题 I'm trying to initialize a global map std::map<long, std::string> Global_ID_Mapper; with a number of "init" classes like: struct AGlobalMapperInitializer { AGlobalMapperInitializer() { Global_ID_Mapper.insert( std::make_pair(1, "Value1") ); Global_ID_Mapper.insert( std::make_pair(2, "Value2") ); } }; I want to fill the map automatically during application start. So in one of my cpp files, I just define a global variable of that "init" class. // AGlobalMapperInitializer.cpp

问题 I am creating native library binding for the Wikitude SDK. The MonoTouch app fails linking : Undefined symbols for architecture armv7: "std::__1::basic_string, std::__1::allocator >::find_last_of(char const*, unsigned long, unsigned long) const", referenced from: WtUnzip::unzipFileTo(char const*, bool)in WikitudeSDK.a(wtunzip.o) ... My LinkWith: [assembly: LinkWith ("WikitudeSDK.a", LinkTarget.ArmV7, Frameworks = "CoreVideo Security SystemConfiguration CoreMedia AVFoundation CFNetwork

问题 A google search for "ignoring linker optimzation hint" practically turns up nothing. NOTE: "optimzation" is the exact spelling :) I'm using a 3rd party WebRTC library (libjingle_peerconnection) from Pristine in one of my apps and I get warnings when I build for my iPhone 6. I'm not sure if this warning will pop up for other devices, however, it does not appear when I build for the simulator. I have exactly 68 of these bad boys in my build output: ld: warning: ignoring linker optimzation hint

问题 This question already has answers here : Why does the order in which libraries are linked sometimes cause errors in GCC? (9 answers) Closed 5 years ago . I have gfortran installed on my system and the file libgfortran.a can be found at /usr/lib/gcc/x86_64-linux-gnu/4.6/ . Using nm I made sure that the function _gfortran_compare_string is defined in there: $ nm /usr/lib/gcc/x86_64-linux-gnu/4.6/libgfortran.a | grep _gfortran_compare_string Returns 0000000000000000 T _gfortran_compare_string

问题 I'm porting a big chunk of native code with several interdependent libraries. Loading the code fails since Android linker only looks dependencies in /system/lib/ and not in the application install directory at /data/data/com.packagename.nnn/lib . As a first workaround I loaded all .so's from Java with System.load() in correct dependency order . This solution isn't satisfactory for me mostly because the set of libraries changes from build to build due to plugin architecture. Also the UI

问题 I'm cross-compiling a V8 project to an embedded ARM target using the GCC arm-gnueabi cross compiler. I got the V8 library itself cross-compiled successfully, and as a smoke test I wanted to link it to Google's hello world example and run it on the ARM board. The libraries themselves clock in at a bit over 1.2 MB: v8 % find out/arm.release/obj.target/ -name '*.a' -exec du -h {} + 1.2M out/arm.release/obj.target/tools/gyp/libv8_base.a 12K out/arm.release/obj.target/tools/gyp/libv8_libbase.a 4

问题 I can't seem to figure out why some printf library functions get linked into my code from libc_nano.a even though I never use any printf . It steals at least 2K of valuable flash memory space. I can see the sections _printf_i , _vfprintf_r , _vfiprintf_r , etc. in my linker map file. I tried Wl,--exclude-libs option EXCLUDE_FILE(..) in linker script None of these make the symbols disappear from the map file.. My gcc options: CFLAGS = -Og -Wall -g3 -Wdouble-promotion -mcpu=cortex-m0 -mthumb

问题 I have this library which involves some static initialization code which needs to run before main() . It all works well if you just compile all of the translation units together, but it doesn't work if I provide a static library ( .a file) and have users link their application against it - the linker simply ignores the symbols which do my static initialization. Alternatively, I can make the linker pick up everything in the static library, if I specify the -Wl,--whole-archive option to GCC, i