Temporary header file '/tmp/782nXUAWg4/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _GXX_NULLPTR_T
#define CLUTTER_ENABLE_COMPOSITOR_API 1
#define _REGEX_NELTS(n)
#define _Atomic
#define PACKED
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/svxlink/AsyncAudioAmp.h"
  #include "/usr/include/svxlink/AsyncAudioClipper.h"
  #include "/usr/include/svxlink/AsyncAudioCompressor.h"
  #include "/usr/include/svxlink/AsyncAudioDebugger.h"
  #include "/usr/include/svxlink/AsyncAudioDecimator.h"
  #include "/usr/include/svxlink/AsyncAudioDecoder.h"
  #include "/usr/include/svxlink/AsyncAudioDelayLine.h"
  #include "/usr/include/svxlink/AsyncAudioDevice.h"
  #include "/usr/include/svxlink/AsyncAudioDeviceFactory.h"
  #include "/usr/include/svxlink/AsyncAudioEncoder.h"
  #include "/usr/include/svxlink/AsyncAudioFifo.h"
  #include "/usr/include/svxlink/AsyncAudioFilter.h"
  #include "/usr/include/svxlink/AsyncAudioFsf.h"
  #include "/usr/include/svxlink/AsyncAudioGenerator.h"
  #include "/usr/include/svxlink/AsyncAudioIO.h"
  #include "/usr/include/svxlink/AsyncAudioInterpolator.h"
  #include "/usr/include/svxlink/AsyncAudioJitterFifo.h"
  #include "/usr/include/svxlink/AsyncAudioMixer.h"
  #include "/usr/include/svxlink/AsyncAudioNoiseAdder.h"
  #include "/usr/include/svxlink/AsyncAudioPacer.h"
  #include "/usr/include/svxlink/AsyncAudioPassthrough.h"
  #include "/usr/include/svxlink/AsyncAudioProcessor.h"
  #include "/usr/include/svxlink/AsyncAudioReader.h"
  #include "/usr/include/svxlink/AsyncAudioRecorder.h"
  #include "/usr/include/svxlink/AsyncAudioSelector.h"
  #include "/usr/include/svxlink/AsyncAudioSink.h"
  #include "/usr/include/svxlink/AsyncAudioSource.h"
  #include "/usr/include/svxlink/AsyncAudioSplitter.h"
  #include "/usr/include/svxlink/AsyncAudioStreamStateDetector.h"
  #include "/usr/include/svxlink/AsyncAudioValve.h"
  #include "/usr/include/svxlink/AsyncSigCAudioSink.h"
  #include "/usr/include/svxlink/AsyncSigCAudioSource.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/782nXUAWg4/dump1.h"  -I/usr/include/svxlink

In file included from /usr/include/svxlink/AsyncAudioAmp.h:46,
                 from /tmp/782nXUAWg4/dump1.h:12:
/usr/include/svxlink/AsyncAudioProcessor.h:38:10: fatal error: sigc++/sigc++.h: No such file or directory
   38 | #include <sigc++/sigc++.h>
      |          ^~~~~~~~~~~~~~~~~
compilation terminated.