Visual C++: How to disable specific linker warnings?
Add the following as a additional linker option: /ignore:4099 This is in Properties->Linker->Command Line
linker
Undefined reference to `stdscr’ while using ncurses
I was having this problem with an ncurses program on Centos 6.2. It turns out that ncurses is sometimes split into two libraries, ncurses and tinfo. In my case, stdscr exists in libtinfo, not in libncurses, so adding -ltinfo to the link line, after -lncurses, solved the problem.
Compiling multiple C files in a program
The correct way is as follows: file1.c #include <stdio.h> #include “file2.h” int main(void){ printf(“%s:%s:%d \n”, __FILE__, __FUNCTION__, __LINE__); foo(); return 0; } file2.h void foo(void); file2.c #include <stdio.h> #include “file2.h” void foo(void) { printf(“%s:%s:%d \n”, __FILE__, __func__, __LINE__); return; } output $ $ gcc file1.c file2.c -o file -Wall $ $ ./file file1.c:main:6 file2.c:foo:6 $
.bss vs COMMON: what goes where?
// file a.c // file-scope int a = 0; // goes into BSS after compilation of a.c into object file a.o, a symbol goes into BSS section. // file b.c // file-scope int b; // goes into COMMON section after compilation of b.c into object file b.o, b symbol goes into COMMON section. After linking … Read more
Can I link a plain file into my executable? [duplicate]
You could do this: objcopy –input binary \ –output elf32-i386 \ –binary-architecture i386 my_file.xml myfile.o This produces an object file that you can link into your executable. This file will contain these symbols that you’ll have to declare in your C code to be able to use them 00000550 D _binary_my_file_xml_end 00000550 A _binary_my_file_xml_size 00000000 … Read more
What does the “Link Library Dependency” linker option actually do in Visual Studio 2010 – 2015 and upwards?
You have to give the setting the proper value to bring clarity:
error LNK2005: xxx already defined in MSVCRT.lib(MSVCR100.dll) C:\something\LIBCMT.lib(setlocal.obj)
You are mixing code that was compiled with /MD (use DLL version of CRT) with code that was compiled with /MT (use static CRT library). That cannot work, all source code files must be compiled with the same setting. Given that you use libraries that were pre-compiled with /MD, almost always the correct setting, you … Read more
Linking a C program directly with ld fails with undefined reference to `__libc_csu_fini`
/usr/lib/libc.so is a linker script which tells the linker to pull in the shared library /lib/libc.so.6, and a non-shared portion, /usr/lib/libc_nonshared.a. __libc_csu_init and __libc_csu_fini come from /usr/lib/libc_nonshared.a. They’re not being found because references to symbols in non-shared libraries need to appear before the archive that defines them on the linker line. In your case, /usr/lib/crt1.o … Read more
cmake find_package specify path
In the find_package documentation you have that you can set a path to be searched with PATHS you were missing the S… also you can do something like: find_package (<package> PATHS paths… NO_DEFAULT_PATH) find_package (<package>) Which will check for the path you wrote first, the if it is found it will set found to true … Read more
difference between dynamic loading and dynamic linking?
This answer assumes that you know basic Linux command. In Linux, there are two types of libraries: static or shared. In order to call functions in a static library you need to statically link the library into your executable, resulting in a static binary. While to call functions in a shared library, you have two … Read more