Question

我正在尝试使用PortAudio通过麦克风进行音频录制。但是我遇到了很多错误-

Compiling single file...
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- Filename: C:\Users\Gumm\Downloads\pa_stable_v190600_20161030\portaudio\examples\paex_record.c
- Compiler Name: TDM-GCC 4.9.2 64-bit Debug

Processing C source file...
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- C Compiler: C:\Program Files (x86)\Dev-Cpp\MinGW64\bin\gcc.exe
- Command: gcc.exe "C:\Users\Gumm\Downloads\pa_stable_v190600_20161030\portaudio\examples\paex_record.c" -o "C:\Users\Gumm\Downloads\pa_stable_v190600_20161030\portaudio\examples\paex_record.exe" -g3 -I"C:\Program Files (x86)\Dev-Cpp\MinGW64\include" -I"C:\Program Files (x86)\Dev-Cpp\MinGW64\x86_64-w64-mingw32\include" -I"C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include" -L"C:\Program Files (x86)\Dev-Cpp\MinGW64\lib" -L"C:\Program Files (x86)\Dev-Cpp\MinGW64\x86_64-w64-mingw32\lib" -L"C:\Users\Gumm\Downloads\pa_stable_v190600_20161030\portaudio\examples" -g3
C:\Users\Gumm\AppData\Local\Temp\ccih6neG.o: In function `main':
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:224: undefined reference to `Pa_Initialize'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:227: undefined reference to `Pa_GetDefaultInputDevice'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:234: undefined reference to `Pa_GetDeviceInfo'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:238: undefined reference to `Pa_OpenStream'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:249: undefined reference to `Pa_StartStream'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:255: undefined reference to `Pa_Sleep'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:253: undefined reference to `Pa_IsStreamActive'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:260: undefined reference to `Pa_CloseStream'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:303: undefined reference to `Pa_GetDefaultOutputDevice'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:310: undefined reference to `Pa_GetDeviceInfo'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:314: undefined reference to `Pa_OpenStream'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:327: undefined reference to `Pa_StartStream'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:332: undefined reference to `Pa_Sleep'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:332: undefined reference to `Pa_IsStreamActive'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:335: undefined reference to `Pa_CloseStream'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:342: undefined reference to `Pa_Terminate'
C:/Users/Gumm/Downloads/pa_stable_v190600_20161030/portaudio/examples/paex_record.c:349: undefined reference to `Pa_GetErrorText'
collect2.exe: error: ld returned 1 exit status


Compilation results...
--------
- Errors: 1
- Warnings: 0
- Compilation Time: 0.53s

我知道这是一个链接器错误，但无法从我下载的portaudio中找到任何.lib文件。我该如何解决这个问题？

Answer 1

您似乎在尝试构建其中一个端口音频示例，而无需先构建和/或链接portaudio库！

为Windows构建portaudio

自从您使用Windows以来，主要有两种构建portaudio的方法（官方文档参考）：

使用Visual Studio (VS)：portaudio下载提供了一个VS项目，您必须对其进行一些小更改，然后才能（希望）进行编译。
With MinGW：在Windows上构建portaudio的命令行版本。如果尚未安装，则需要安装MinGW，但我认为这种方法比我过去使用Visual Studio尝试的要容易得多。

您使用的任何一种技术都会生成一个静态.lib文件，然后您可以将其用于链接到您的项目（即，您尝试编译的源文件）。

链接端口音频

Visual Studio

因此，由于您是Windows用户，所以如果您想准备安装项目，建议您在Visual Studio中执行此操作（创建一个空的c ++命令行程序，并添加paex_record.c文件）。下面是在VS中设置静态库的快速方法。

引用Project中的库头（portaudio.h）属性-> C / C ++->常规->其他包含目录
在Project Properties-> Linker-> Input

有关更多信息 creating and using static libs。

MinGW

在我看来，使用MinGW实际上要简单得多，但是如果您不习惯在命令行中工作，则可能不喜欢它。

假设您的项目目录包含三个文件（为简单起见）：

Project Folder
     |paex_record.c
     |portaudio.lib
     |portaudio.h

然后，编译命令（source）为：

 cd /Project/Directory
 gcc paex_record.c -lportaudio

未定义对Portaudio中的错误的引用

1 个答案:

为Windows构建portaudio

链接端口音频

Visual Studio

MinGW