我知道这是一个奇怪的问题，因为解决方案是转移到更新的操作系统，但我想为这台旧机器再生一次。
这是一款带有Dual 2 Core的macboolAir，应该是64位处理器，但据报道是i386 arch。我用gcc 9（4.0.1）安装了Xcore 3.1.4。
现在，如果我尝试编译应用程序，我会在10.6机器上遇到错误：
为了查看原因，我已经将gcc的每个选项都排除在外，这就是结果：
mc-book-air:squeezelite-r2 macbookair$ i686-apple-darwin9-gcc-4.0.1 output_pa.c -c -o output_pa
In file included from /System/Library/Frameworks/IOKit.framework/Headers/IOKitLib.h:41,
from /System/Library/Frameworks/DiskArbitration.framework/Headers/DADisk.h:28,
from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/Files.h:62,
from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/Components.h:32,
from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/CarbonCore.h:85,
from /System/Library/Frameworks/CoreServices.framework/Frameworks/AE.framework/Headers/AE.h:20,
from /System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:21,
from /System/Library/Frameworks/AudioUnit.framework/Headers/AUComponent.h:21,
from /System/Library/Frameworks/AudioUnit.framework/Headers/AudioUnit.h:22,
from /usr/local/include/pa_mac_core.h:48,
from output_pa.c:29:
/usr/include/mach/mach_types.h:117: error: conflicting types for 'pthread_t'
/usr/include/sys/types.h:350: error: previous declaration of 'pthread_t' was here
/usr/include/mach/mach_types.h:177: error: syntax error before 'thread_port_array_t'
output_pa.c: In function '_pa_open':
output_pa.c:290: warning: passing argument 1 of 'pthread_create' from incompatible pointer type
output_pa.c包含：
#include "squeezelite.h"
#if PORTAUDIO
#include <portaudio.h>
#if OSX
#include <pa_mac_core.h>
#endif
其中portaudio.h和pa_mac_core.h是在同一系统中编译的libportaudio.a的头文件，其中包含i386，x86_64，ppc和ppc64 archs。
squeezelite.h是'main'应用程序头，包含：
#include <pthread.h>
我很困惑。我应该寻找什么？
谢谢，Marco。