c++ - OS X上的FastFormat

在阅读了有关FastFormat的一些知识之后，我决定将其下载并安装在运行OS X 10.8的Macbook Pro上。我成功地构建了FastFormat，并运行了性能测试。然后我写了一个小测试来检查它是否有效:

#include <cstdlib>
#include <fastformat/fastformat.hpp>
#include <fastformat/sinks/ostream.hpp>

int main()
{
    return EXIT_SUCCESS;
}

使用g++-4.7进行编译(并确保所有包含路径正确)后，我从PlatformSTL中获得了编译时错误，例如以下错误。

error: #error Operating system not discriminated. Only UNIX and Windows are currently recognised by PlatformSTL
error: #error Operating system not discriminated

我尝试通过手动定义unix和PLATFORMSTL_OS_IS_UNIX来抑制这些错误，但随后收到以下链接器错误:

Undefined symbols for architecture x86_64:
  "_fastformat_exitProcess", referenced from:
      fastformat::fastformat_initialiser::fastformat_initialiser() in ccMqErni.o
  "_fastformat_getInitCodeString", referenced from:
      fastformat::fastformat_initialiser::record_init_failure_(int)    in ccMqErni.o
  "_fastformat_init", referenced from:
      fastformat::fastformat_initialiser::fastformat_initialiser() in ccMqErni.o
  "_fastformat_uninit", referenced from:
      fastformat::fastformat_initialiser::~fastformat_initialiser() in ccMqErni.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status

OS X是否支持FastFormat，如果支持，我在做什么错？

最佳答案

Mac OS X不提供UNIX尝试检测的unix(或__unix__，__unix，PlatformSTL)宏。这样在defined(__MACH__)中添加platformstl.h行(第154行)后，我便能够编译您的示例:

#if defined(unix) || \
    defined(UNIX) || \
    defined(__unix__) || \
    defined(__unix) || \
    defined(__MACH__)
# define PLATFORMSTL_OS_IS_UNIX

要抑制 undefined 的符号错误，您可以定义宏FASTFORMAT_NO_AUTO_INIT:
g++ -I<path to fastformat and stlsoft headers> -DFASTFORMAT_NO_AUTO_INIT main.cpp

关于c++ - OS X上的FastFormat，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/13717936/