Undefined reference to extern
So, as a result - an undefined reference/unresolved external symbol error happens when the linker cannot find global symbols in the object files. ,This looks like a linker error. You need to make sure you link your executable properly: cc -c general.c cc -c main.c cc general.o main.o ./a.out. ,2015年1月22日 — You have to add int count; to your z.c file. This because of declaring a variable in header file as extern tells to the compiler that the ... ,Looks like you are compiling only the main.c and not fun1.c, fun2.c and fun3.c. You can try to compile as follows: gcc -c main.c -o main.o ...,I know this question is old, but it still might be helpful for someone. The global variable (here: MyClass inst ) should not be extern for ... ,You have to declare pallete extern in common.cpp . Right now main.cpp knows that it should look for pallete in separate file but ... ,Thank you all for the comments. My mistake was to assume that extern double d defines the variable in the same way as double d . ,2014年12月9日 — 檔案一：int g_var1; 檔案二：extern int g_val1; 然而，我從來沒有想過如果沒有extern的情況會發生什麼狀況。 ... 這是一個undefined symbol. ,2021年6月28日 — Unresolved External Symbol ... The unresolved external symbol is a linker error that indicates it cannot find the symbol or its reference during ... ,2017年3月22日 — C++程序編譯時，經常遇到 undefined reference to 或者 unresolved external symbol 問題，這裏闡述一下問題原因及解決方法。
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 Undefined reference to extern 相關參考資料
What is an undefined referenceunresolved external symbol ...
So, as a result - an undefined reference/unresolved external symbol error happens when the linker cannot find global symbols in the object files. https://stackoverflow.com C: undefined reference to a variable when using extern - Stack ...
This looks like a linker error. You need to make sure you link your executable properly: cc -c general.c cc -c main.c cc general.o main.o ./a.out. https://stackoverflow.com Undefined reference to global variable during linking - Stack ...
2015年1月22日 — You have to add int count; to your z.c file. This because of declaring a variable in header file as extern tells to the compiler that the ... https://stackoverflow.com Undefined reference to extern function - C - Stack Overflow
Looks like you are compiling only the main.c and not fun1.c, fun2.c and fun3.c. You can try to compile as follows: gcc -c main.c -o main.o ... https://stackoverflow.com undefined reference when using extern - Stack Overflow
I know this question is old, but it still might be helpful for someone. The global variable (here: MyClass inst ) should not be extern for ... https://stackoverflow.com extern array goes undefined reference error, but works well for ...
You have to declare pallete extern in common.cpp . Right now main.cpp knows that it should look for pallete in separate file but ... https://stackoverflow.com c extern undefined reference - Stack Overflow
Thank you all for the comments. My mistake was to assume that extern double d defines the variable in the same way as double d . https://stackoverflow.com 談談C語言的全域變數和Linux Object 檔案的關係- My code ...
2014年12月9日 — 檔案一：int g_var1; 檔案二：extern int g_val1; 然而，我從來沒有想過如果沒有extern的情況會發生什麼狀況。 ... 這是一個undefined symbol. http://wen00072.github.io C++ Errors: Undefined Reference, Unresolved External ...
2021年6月28日 — Unresolved External Symbol ... The unresolved external symbol is a linker error that indicates it cannot find the symbol or its reference during ... https://www.softwaretestinghel C++ undefined referenceunresolved external symbol問題原因 ...
2017年3月22日 — C++程序編譯時，經常遇到 undefined reference to 或者 unresolved external symbol 問題，這裏闡述一下問題原因及解決方法。 https://vimsky.com |