I think you are confused about how the compiler puts things together. When you use -c flag, i.e. no linking is done, the input is C++ code, and the output is object code. The .o files thus don’t mix with -c, and compiler warns you about that. Symbols from object file are not moved to other object files like that. All object … Read more
Don’t define variables in headers. Put declarations in header and definitions in one of the .c files. In config.h In some .c file: If you put a definition of a global variable in a header file, then this definition will go to every .c file that includes this header, and you will get multiple definition … Read more
The math library must be linked in when building the executable. How to do this varies by environment, but in Linux/Unix, just add -lm to the command: The math library is named libm.so, and the -l command option assumes a lib prefix and .a or .so suffix.
When you build projects for MinGW, under MSYS, you should always specify a –prefix argument to ./configure; (the /usr/local default specifies an MSYS specific path, which is entirely unsuitable for MinGW application development). In your case, you should have configured GSL thus: or, better still, segregate the build files from the sources, (e.g. as a subdirectory of the GSL top source directory): … Read more
The math library must be linked in when building the executable. How to do this varies by environment, but in Linux/Unix, just add -lm to the command: The math library is named libm.so, and the -l command option assumes a lib prefix and .a or .so suffix.
The math library must be linked in when building the executable. How to do this varies by environment, but in Linux/Unix, just add -lm to the command: The math library is named libm.so, and the -l command option assumes a lib prefix and .a or .so suffix
How are you doing the compiling and linking? You’ll need to specify both files, something like: …so that it knows to link the functions from both together. With the code as it’s written right now, however, you’ll then run into the opposite problem: multiple definitions of main. You’ll need/want to eliminate one (undoubtedly the one in … Read more
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 (introducing new-line characters for end-of-line indicators) … Read more
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 (introducing new-line characters for end-of-line indicators) … Read more