linker-errors

问题 I have a mem_malloc() and mem_free() defined for me and I want to use them to replace the malloc() and free() and consequently C++'s new and delete. I define them as follows: extern "C" { extern void *mem_malloc(size_t); extern void mem_free(void *); void * malloc(size_t size) { return mem_malloc(size); } void free(void *memory) { mem_free(memory); } } However, I get two link errors: [user@machine test]$ g++ -m32 -pthread main.cpp -static libmemnmf-O.a /usr/lib/../lib/libc.a(malloc.o): In

问题 I took the source of AndEngine from their git repo, downloaded a fresh AndroidStudio, sdk and ndk,imported it, and tried to creat a simple new empty GameActivity extends BaseGameActivity. But I could not start it, cause I get the following errors: /home/uhu/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /home/uhu/AndroidStudioProjects/aaa/andEngine/build/intermediates/ndk/release/obj

问题 Can anybody help me out? Everything worked fine on my project but after updating to Xcode10 Beta5 I'm getting this error when trying to run the App on my iPhone. Simulator however works… Please Help me!!! I already did a web search on this problem and found this thread. I tried all answers but none worked.. If you had this problem I would be very very thankful if you can help me running my app on my iPhone again These are the pods I've integrated: and this is my pod file: 回答1: "libstdc++.6.0

问题 I have an XCode workspace created with XCode 6.0.1. It constains 2 (Swift) libraries and one iOS app (Swift) that depends on those 2 libraries. I had stable setup that allowed me to run the iOS app on both iPhone and simulators: The 2 library projects were added as Embedded Binaries (see picture) of the app. Now, I have XCode 6.1. Recently, I deleted DerivedData folder in ~/Library/Developer/Xcode folder while XCode was running. After that my workspace did not work - the iOS app would fail to

问题 I am writing small program using 3rd party library. 3rd party library is placed in Linux machine. From visual studio 2017 using crossplatform i am running my small code with help of 3rd party library(.so files). path everything mentioned properly and vs2017 able to find .so files but facing below issues. Error undefined reference to `dladdr' Error undefined reference to `dlopen' Note: In linker ->Report Unsolved Symbol Reference ->Yes (-Wl,--no-undefined) but still facing that errors. Any

问题 I am trying to create an executable with .o ,.so, .a files. Here is my build command:- pkgs/gcc/v4.8.3/bin/gcc -L/usr/X11R6/lib -O2 -DUSE_FLEX -Wall -Wno-char-subscripts -fPIC -DLINUX -DG_DISABLE_CONST_RETURNS -fno-strict-aliasing -o ../build/kl/Release/test/bin/pure.exe -L../build/kl/Release/test/modules ../build/kl/Release/test/maker/constrfunc.TCL.o ../../build/kl/Release/test/maker/pvdbprocs.TCL.o .. ../build/kl/Release/test/maker/maker/memmaker.TCL.o .. ../build/kl/Release/test/maker

问题 I developed an application for an ARM7 embedded system in C. Now I want to compile and link it with C++ in order to use some C++ features. To do this, I am using mipsel-elf-g++ instead of mipsel-elf-gcc . I can compile my code with mipsel-elf-g++ successfully, but in linking step I get the errors: /opt/mipsel/lib/gcc/mipsel-elf/3.4.6/../../../../mipsel-elf/lib/libc.a(lib_a-abort.o): In function ```abort': /cygdrive/d/Files/cross/mips/newlib-1.15.0/newlib/libc/stdlib/abort.c:63: undefined

问题 I developed an application for an ARM7 embedded system in C. Now I want to compile and link it with C++ in order to use some C++ features. To do this, I am using mipsel-elf-g++ instead of mipsel-elf-gcc . I can compile my code with mipsel-elf-g++ successfully, but in linking step I get the errors: /opt/mipsel/lib/gcc/mipsel-elf/3.4.6/../../../../mipsel-elf/lib/libc.a(lib_a-abort.o): In function ```abort': /cygdrive/d/Files/cross/mips/newlib-1.15.0/newlib/libc/stdlib/abort.c:63: undefined

问题 I am trying to write an Http proxy that basically works like indianwebproxy So i fired up qtcreator and but one of my classes is failing to compile with the infamous error : undefined reference to vtable for HttpProxyThreadBrowser . I can't figure out why its doing this. I read through similar questions on Stackoverflow and apparently the problem is with undefined virtual methods that are not pure But i have not declared any virtual functions. Here is my class class HttpProxyThreadBrowser :

问题 EDIT: I'm not going to do this, I now realize how dangerous this can be. But, the question stays for purely academic purposes. I'm trying to implement a category on NSCollectionView that will let me access the private variable _displayedItems. I need to be able to access it in my subclass. So, I've created the following category: @interface NSCollectionView (displayedItems) - (NSMutableArray *)displayedItems; @end @implementation NSCollectionView (displayedItems) - (NSMutableArray *