Tag: c++
Recently I was getting error messages from GHC while building Haskell
programs that complain about unknown symbols referring to C++ standard
template library symbols. It turns out that these are weak symbols
(since only one definition is required) and telling ghc to pass the
extra (forbidden, deprecated, and evil) -fno-weak flag to gcc helps.
I guess I am in trouble when this flag is finally removed.
After changing this, the compiler complained that it could not find
libstdc++.so. A
ghc bug de…
My advisor presented me with an interesting problem the other day.
Calling some simple C++ free functions that took C++ objects by value
using Python's ctypes produced strange results. We eventually narrowed the test
case down to the following:
1#include <stdio.h>
2
3struct Simple {
4 int x,y,z;
5};
6
7struct Fancy {
8 int x,y,z;
9 ~Fancy() {
10 printf("Destroying a Fancy\n");
11 }
12};
13
14extern "C" {
15 void printSimple(Simple s) {
16 fprintf(stderr, &qu…