cmake COVERAGE option to enable gcov instrumentation

CMakeLists.txt

@@ -110,6 +110,9 @@ option(BUILD_PORTAUDIO "Build with support for PortAudio audio backend." ON)
 option(BUILD_PORTMIDI "Build with support for PortAudio's MIDI features." ${BUILD_PORTAUDIO}) # PortAudio required
 option(BUILD_PCH "Build using precompiled headers." ON)
 option(BUILD_FOR_WINSTORE "Build for the Windows Store." OFF)
+option(COVERAGE "Build with instrumentation to record code coverage." OFF)
+
+set (ENABLE_COVERAGE (COVERAGE AND CMAKE_BUILD_TYPE MATCHES "DEBUG"))
 
 if (APPLE)
       set (CMAKE_CXX_COMPILER   clang++)

Makefile

@@ -34,6 +34,7 @@ BUILD_PULSEAUDIO="ON" # Override with "OFF" to disable.
 BUILD_JACK="ON"       # Override with "OFF" to disable.
 BUILD_PORTAUDIO="ON"  # Override with "OFF" to disable.
 USE_SYSTEM_FREETYPE="OFF" # Override with "ON" to enable. Requires freetype >= 2.5.2.
+COVERAGE="OFF"        # Override with "ON" to enable.
 
 
 UPDATE_CACHE="TRUE"# Override if building a DEB or RPM, or when installing to a non-standard location.
@@ -56,9 +57,9 @@ release:
   	  -DBUILD_LAME="${BUILD_LAME}"             \
   	  -DBUILD_PULSEAUDIO="${BUILD_PULSEAUDIO}" \
   	  -DBUILD_JACK="${BUILD_JACK}"             \
-   	  -DBUILD_PORTAUDIO="${BUILD_PORTAUDIO}"   \
-   	  -DUSE_SYSTEM_FREETYPE="${USE_SYSTEM_FREETYPE}" \
-  	  -DCMAKE_SKIP_RPATH="${NO_RPATH}"     ..; \
+     -DBUILD_PORTAUDIO="${BUILD_PORTAUDIO}"   \
+     -DUSE_SYSTEM_FREETYPE="${USE_SYSTEM_FREETYPE}" \
+     -DCMAKE_SKIP_RPATH="${NO_RPATH}"     ..; \
       make lrelease;                             \
       make -j ${CPUS};                           \
 
@@ -83,6 +84,7 @@ debug:
   	  -DBUILD_JACK="${BUILD_JACK}"                        \
    	  -DBUILD_PORTAUDIO="${BUILD_PORTAUDIO}"              \
    	  -DUSE_SYSTEM_FREETYPE="${USE_SYSTEM_FREETYPE}"      \
+     -DCOVERAGE="${COVERAGE}"                 \
   	  -DCMAKE_SKIP_RPATH="${NO_RPATH}"     ..;            \
       make lrelease;                                        \
       make -j ${CPUS};                                      \

build/travis/job1_Tests/install.sh

@@ -5,5 +5,5 @@ set -e # exit on error
 set -x # echo commands
 
 make revision
-make debug CPUS=2 PREFIX="$HOME/software"
+make debug CPUS=2 PREFIX="$HOME/software" COVERAGE=ON
 make installdebug CPUS=2 PREFIX="$HOME/software"

libmscore/CMakeLists.txt

@@ -74,10 +74,25 @@ add_library (
       bracketItem.cpp
       )
 
+##
+## Code coverage. Only affects DEBUG builds.
+##
+
+set(COVERAGE_OPTIONS "")
+if (NOT APPLE AND NOT MINGW)
+   if (ENABLE_COVERAGE)
+      set(COVERAGE_OPTIONS "-O0 --coverage")
+      set(CMAKE_CXX_OUTPUT_EXTENSION_REPLACE 1)
+      target_link_libraries(libmscore gcov)
+   endif (ENABLE_COVERAGE)
+endif (NOT APPLE AND NOT MINGW)
+
+
+
 set_target_properties (
       libmscore
       PROPERTIES
-         COMPILE_FLAGS "-g ${PCH_INCLUDE} -Wall -Wextra -Winvalid-pch -Woverloaded-virtual"
+         COMPILE_FLAGS "-g ${PCH_INCLUDE} -Wall -Wextra -Winvalid-pch -Woverloaded-virtual ${COVERAGE_OPTIONS}"
       )
 
 xcode_pch(libmscore all)