<div dir="ltr">Hi,<div><br></div><div>I am using Xcode 7.3 and GStreamer iOS 1.8.1. I created a project by using "GStreamer single view template". However, I got error messages when I tried to use <span style="color:rgb(0,132,0);font-family:Menlo;font-size:11px">#define GST_IOS_PLUGINS_EFFECTS. </span></div><div><font color="#000000" face="Menlo"><span style="font-size:11px">The error messages are as below. Please help me figure out how to fix this problem Thanks.</span></font></div><div><font color="#000000" face="Menlo"><span style="font-size:11px"><br></span></font></div><div><p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">Undefined symbols for architecture arm64:</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">  "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)", referenced from:</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">      soundtouch::SoundTouch::putSamples(float const*, unsigned int) in GStreamer(libSoundTouch_a_arm64_-SoundTouch.o)</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">      soundtouch::FIRFilter::setCoefficients(float const*, unsigned int, unsigned int) in GStreamer(libSoundTouch_a_arm64_-FIRFilter.o)</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">  "std::runtime_error::runtime_error(std::string const&)", referenced from:</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">      soundtouch::SoundTouch::putSamples(float const*, unsigned int) in GStreamer(libSoundTouch_a_arm64_-SoundTouch.o)</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">      soundtouch::FIRFilter::setCoefficients(float const*, unsigned int, unsigned int) in GStreamer(libSoundTouch_a_arm64_-FIRFilter.o)</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">  "std::string::_Rep::_S_empty_rep_storage", referenced from:</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">      soundtouch::SoundTouch::putSamples(float const*, unsigned int) in GStreamer(libSoundTouch_a_arm64_-SoundTouch.o)</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">      soundtouch::FIRFilter::setCoefficients(float const*, unsigned int, unsigned int) in GStreamer(libSoundTouch_a_arm64_-FIRFilter.o)</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">  "std::string::_Rep::_M_destroy(std::allocator<char> const&)", referenced from:</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">      soundtouch::SoundTouch::putSamples(float const*, unsigned int) in GStreamer(libSoundTouch_a_arm64_-SoundTouch.o)</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">      soundtouch::FIRFilter::setCoefficients(float const*, unsigned int, unsigned int) in GStreamer(libSoundTouch_a_arm64_-FIRFilter.o)</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">ld: symbol(s) not found for architecture arm64</p>
<p style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo">clang: error: linker command failed with exit code 1 (use -v to see invocation)</p></div><div><br></div></div>