cmake: add test coverage generation

This commit also adds the sample `script/coverage` script to help
developer in generating the coverage reports, and requires the updated
build container with `gcovr`

Author: giomba

CMakeLists.txt

@@ -72,7 +72,7 @@ set_source_files_properties(src/3rd/disassembler.c PROPERTIES COMPILE_FLAGS -Wno
 # Automatically add targets, with same properties
 function(add_ceda_target target)
 
-    target_compile_options(${target} PRIVATE -W -Wformat -Wall -Wundef -Wpointer-arith -Wcast-qual -Wwrite-strings -Wsign-compare -Wmissing-noreturn -Wextra -Wconversion)
+    target_compile_options(${target} PRIVATE -W -Wformat -Wall -Wundef -Wpointer-arith -Wcast-qual -Wwrite-strings -Wsign-compare -Wmissing-noreturn -Wextra -Wconversion -coverage)
 
     if(CMAKE_BUILD_TYPE MATCHES "Release")
         target_compile_options(${target} PRIVATE -Werror)
@@ -86,6 +86,7 @@ function(add_ceda_target target)
         SDL3_mixer
         inih
     )
+    target_link_options(${target} PRIVATE -coverage)
 
     set_target_properties(${target} PROPERTIES C_CLANG_TIDY "${CLANG_TIDY_COMMAND}")
 

Dockerfile

@@ -37,6 +37,8 @@ RUN cd /build && \
     meson install -C build && \
     ldconfig
 
+RUN apt install -y gcovr
+
 RUN useradd -s /bin/bash --create-home builder
 USER builder
 RUN mkdir -p /home/builder/workspace

script/coverage

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+pushd build.release
+ctest -T coverage
+
+pushd Testing/CoverageInfo
+gcovr --root ../../.. --html-details coverage.html
+
+popd
+popd
+
+

script/docker

@@ -12,5 +12,5 @@ docker run --rm -ti -u ubuntu \
     -v "$(pwd)":/home/ubuntu/workspace \
     -v /tmp:/tmp \
     -w /home/ubuntu/workspace \
-    giomba/ceda-cemu-builder:3 \
+    giomba/ceda-cemu-builder:4 \
     "$@"