Is it [] & lt; typename & gt; () {} a valid lambda definition?

I was experimenting with lambdas and compilers because of another question here on SO. I've just realized (and it's perfectly normal indeed) that the following code is valid: int main() { auto l = [](){}; l.operator()(); } Actually the standard says

Syntax conflict with awk in program C

I'm trying to integrate a small awk script into a C program, but every time I try to compile it, I get errors regarding the syntax, because gcc thinks that it's C even though it isn't. terminal_monitor = popen("awk '{if(l1){ download=($2-l1)/1024 dow

Error Installing EventMachine Gem on OSX Yosemite

Here is the full output of the error message: Fetching: eventmachine-1.0.3.gem (100%) Building native extensions. This could take a while... ERROR: Error installing eventmachine: ERROR: Failed to build gem native extension. /Users/Tyler/.rvm/rubies/r

C ++ variable declaration in loop and runtime error

I have a buffer that is declared in a loop. It is initialized on the first iteration. I recently ran the code in Visual Studio 2010 debug and it breaks on a runtime error: Run-Time Check Failure #3 - The variable 'buffer' is being used without being

How to build a full binary program with gccgo?

I have noticed that when using go build the binary result can be in excess of 2MB; but using gccgo the binary is less than 35k. The other issue that I noticed when using gccgo is that the produced binary isn't runnable on another linux box (missing l

arm-none-eabi-gcc: printing the float number using printf

I am writing a C program for SAM3N arm cortex-M3 microcontroller. When I try to print float numbers, it just prints 'f'. Example: printf("%f",43.12); prints f only, not the 43.12. But printing with integers works fine. How to enable full printin

Specifying 64-bit alignment

Given a structure definition like struct foo { int a, b, c; }; What's the best (simplest, most reliable and portable) way to specify that it should always be aligned to a 64-bit address, even on a 32-bit build? I'm using C++11 with GCC 4.5.2, and hop

Why does GCC keep empty functions?

In most cases if I want to create an optional feature in C, I simply create two functions like this: #ifdef OPTIONAL_SOMETHING void do_something(int n, const char *s) { while (n--) { printf("%s", s); } /* ...You might get the point, really do so

Expected ')' before ';' token G ++

GCC keeps telling me: expected ')' before ';' token, expected primary-expression before ')' token expected ';' before ')' token And I could not find the problem. Here is the function that have the problem: void prim(){ prepararEstructuras(); int min,

Assignment of stack in wrapper / alloca function

I'm looking for a way to wrap stack allocations in abstract data types. For example, I'd like to have a vector which can work strictly via allocations on the stack. My biggest hurdle of course is that alloca works only within the current stack frame

Simple IDE in C, associates my program with gcc

I want write simple C IDE,I wrote some parts of it. It can check syntax of C,now I need to link my program to gcc,to make executable file. Now my program can get what you have entered ,then save it in any format(like notepad) Now I want to say g++ to

Is it a legitimate C ++ code?

The code comes from here Given that in C++ you can use C libraries would you say that the following code is a legitimate C++ code? If not what changes need to be applied? This code compiles with g++ and runs as expected. UPDATE: Thank you for all ans

Stripping linux shared libraries

We've recently been asked to ship a Linux version of one of our libraries, previously we've developed under Linux and shipped for Windows where deploying libraries is generally a lot easier. The problem we've hit upon is in stripping the exported sym

Bool is a native C type?

I've noticed that the Linux kernel code uses bool, but I thought that bool was a C++ type. Is bool a standard C extension (e.g., ISO C90) or a GCC extension?bool exists in the current C - C99, but not in C89/90. In C99 the native type is actually cal