我有一个玩具程序,在OSX 10.6上使用MacPorts gcc时会出现错误。
我已经使用MacPorts安装了Boost 1.52版本。我将程序编译为:
但它无法打印帮助信息:
#include <boost/program_options.hpp>
namespace po = boost::program_options;
#include <iostream>
using namespace std;
int main(int ac, char* av[])
{
po::options_description desc("Allowed options");
desc.add_options() ("help", "produce help message") ;
po::variables_map vm;
po::store(po::parse_command_line(ac, av, desc), vm);
po::notify(vm);
if (vm.count("help")) {
cout << desc << "\n";
return 0;
}
cout << "Program continues\n";
return 0;
}
我已经使用MacPorts安装了Boost 1.52版本。我将程序编译为:
g++ a.cpp -lboost_program_options-mt -L/opt/local/lib -g -O0
编译没有问题:
$ ./a.out
Program continues
但它无法打印帮助信息:
$ ./a.out --help
Allowed options:
a.out(40110) malloc: *** error for object 0x7fff70ca3500: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
Abort trap
我听说如果库文件使用的gcc版本与程序构建时所用的版本不同,就会发生这样的情况。如何检查这个问题呢?
$ g++ --version
g++ (MacPorts gcc47 4.7.2_2) 4.7.2
更新:这似乎在装有旧版Boost的Linux机器上运行良好。
更新2:gdb的输出如下所示。
(gdb) run
Starting program: /Users/yasir/Downloads/mask.util/a.out --help
Reading symbols for shared libraries ++++.. done
Allowed options:
a.out(42256) malloc: *** error for object 0x7fff70ca3500: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
Program received signal SIGABRT, Aborted.
0x00007fff821030b6 in __kill ()
(gdb) bt
#0 0x00007fff821030b6 in __kill ()
#1 0x00007fff821a39f6 in abort ()
#2 0x00007fff820bb195 in free ()
#3 0x00000001001188b4 in std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::overflow ()
(gdb)
更新3:该程序在Xcode gcc42上运行良好,问题仅出现在MacPorts gcc上。