centralize and fixup example sources install targets

This follows suit with aeb036e in qtbase.

Change-Id: Ie8580d0a1f38ab9858b0e44c9f99bdc552a1752a
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: hjk <qthjk@ovi.com>

examples/multimedia/spectrum/spectrum.pri

@@ -0,0 +1,49 @@
+# The following macros allow certain features and debugging output
+# to be disabled / enabled at compile time.
+
+# Debug output from spectrum calculation
+DEFINES += LOG_SPECTRUMANALYSER
+
+# Debug output from waveform generation
+#DEFINES += LOG_WAVEFORM
+
+# Debug output from engine
+DEFINES += LOG_ENGINE
+
+# Dump input data to spectrum analyer, plus artefact data files
+#DEFINES += DUMP_SPECTRUMANALYSER
+
+# Dump captured audio data
+#DEFINES += DUMP_CAPTURED_AUDIO
+
+# Disable calculation of level
+#DEFINES += DISABLE_LEVEL
+
+# Disable calculation of frequency spectrum
+# If this macro is defined, the FFTReal DLL will not be built
+#DEFINES += DISABLE_FFT
+
+# Disables rendering of the waveform
+#DEFINES += DISABLE_WAVEFORM
+
+# If defined, superimpose the progress bar on the waveform
+DEFINES += SUPERIMPOSE_PROGRESS_ON_WAVEFORM
+
+# Perform spectrum analysis calculation in a separate thread
+DEFINES += SPECTRUM_ANALYSER_SEPARATE_THREAD
+
+# Suppress warnings about strncpy potentially being unsafe, emitted by MSVC
+win32: DEFINES += _CRT_SECURE_NO_WARNINGS
+
+win32 {
+    # spectrum_build_dir is defined with a leading slash so that it can
+    # be used in contexts such as
+    #     ..$${spectrum_build_dir}
+    # without the result having a trailing slash where spectrum_build_dir
+    # is undefined.
+    build_pass {
+        CONFIG(release, release|debug): spectrum_build_dir = /release
+        CONFIG(debug, release|debug): spectrum_build_dir = /debug
+    }
+}
+