If you look at the way the C language stores the parameters on the stack, the way the macros work should become clear:- Higher memory address Last parameter Penultimate parameter …. Second parameter Lower memory address First parameter StackPointer -> Return address (note, depending on the hardware the stack pointer maybe one line down and … Read more
From http://www.gnu.org/software/make/manual/make.html: There is another assignment operator for variables, `?=’. This is called a conditional variable assignment operator, because it only has an effect if the variable is not yet defined. This statement: FOO ?= bar is exactly equivalent to this (see The origin Function): ifeq ($(origin FOO), undefined) FOO = bar endif Probably CC … Read more
When talking about non-local static objects there are not many guarantees. As you already know (and it’s also been mentioned here), it should not write code that depends on that. The static initialization order fiasco… Static objects goes through a two-phase initialization: static initialization and dynamic initialization. The former happens first and performs zero-initialization or … Read more
You need to add the dynamic library equivalent of -L: -Wl,-rpath-link,/path/to/lib This will cause the linker to look for shared libraries in non-standard places, but only for the purpose of verifying the link is correct. If you want the program to find the library at that location at run-time, then there’s a similar option to … Read more
You need to include stdio.h, i.e. #include <stdio.h> at the start to import the function definition.
The problem is coming from the linker, ld, rather than gcc (hence the exit status message). In general ld requires objects and libraries to be specified in the order user supplier, where user is an object that uses a library function and supplier is the object which provides it. When your test.c is compiled to … Read more
Opinion plays a role here. The problem is that std::exception does not have a constructor that takes a string argument; this is an MSVC extension. I see two ways to go about it: Don’t pass a string argument Don’t use std::exception The first case is straightforward; just use throw std::exception(); The drawback is that you … Read more
Extend your RAM by adding a swap file: http://www.cyberciti.biz/faq/linux-add-a-swap-file-howto/ a swap file is a file stored on the computer hard drive that is used as a temporary location to store information that is not currently being used by the computer RAM. By using a swap file a computer has the ability to use more memory … Read more
This has just been fixed in gcc-4.7 trunk and gcc-4.6 branch. These should be available in gcc-4.7.0 (a while from now – still in stage 1) and gcc-4.6.2 (alas 4.6.1 just came out.) But the intrepid could wait for the next snapshots or get a subversion copy. See audit trail for details.
I’m assuming that you’re linking dynamically. If both A and B completely encapsulate their respective versions of C then it might be possible to do this. You might have to make sure that the different versions of C are named differently (i.e. libMyC.1.so and libMyC.2.so) to avoid confusion when they are loaded at runtime. You … Read more