build: make DO_COVERAGE a CMake variable

Travis: remove CXXFLAGS (not used), LDFLAGS (typo, not used)

Closes https://github.com/awesomeWM/awesome/pull/2001.

.travis.yml

@@ -105,8 +105,7 @@ install:
     fi
 
   # Install dependencies for code coverage testing.
-  - if [ "$DO_COVERAGE" = "" ]; then export DO_COVERAGE=0; fi
-  - if [ "$DO_COVERAGE" != "0" ]; then sudo luarocks install cluacov; fi
+  - if [ -n "$DO_COVERAGE" ]; then sudo luarocks install cluacov; fi
   - if [ "$DO_COVERAGE" = "coveralls" ]; then sudo luarocks install luacov-coveralls; fi
 
   # Determine custom version.
@@ -156,13 +155,7 @@ install:
       return 0
     }
 script:
-  - export CMAKE_ARGS="-DLUA_LIBRARY=${LUALIBRARY} -DLUA_INCLUDE_DIR=${LUAINCLUDE} -D OVERRIDE_VERSION=$AWESOME_VERSION -DSTRICT_TESTS=true"
-  - |
-    if [ "$DO_COVERAGE" = "codecov" ]; then
-      export CXXFLAGS="-fprofile-arcs -ftest-coverage"
-      export CFLAGS="-fprofile-arcs -ftest-coverage"
-      export LDFLAFS="-fprofile-arcs -ftest-coverage"
-    fi
+  - export CMAKE_ARGS="-DLUA_LIBRARY=${LUALIBRARY} -DLUA_INCLUDE_DIR=${LUAINCLUDE} -D OVERRIDE_VERSION=$AWESOME_VERSION -DSTRICT_TESTS=true -D DO_COVERAGE=$DO_COVERAGE"
   - |
     if [ "$EMPTY_THEME_WHILE_LOADING" = 1 ]; then
       # Break beautiful so that trying to access the theme before beautiful.init() causes an error
@@ -189,7 +182,7 @@ script:
   - |
     set -ex
     if [ "$TRAVIS_TEST_RESULT" = 0 ]; then
-      if [ "$DO_COVERAGE" != "0" ]; then
+      if [ -n "$DO_COVERAGE" ]; then
         travis_fold_start "DO_COVERAGE"
 
         # Run tests/examples explicitly.
@@ -237,7 +230,7 @@ script:
         echo "Testing commit $commit"
         git checkout "$commit"
         git --no-pager show --stat
-        if ! DO_COVERAGE=0 make all check; then
+        if ! make all check CMAKE_ARGS+="-D DO_COVERAGE=0"; then
           failed="$failed $commit"
         fi
         travis_fold_end

awesomeConfig.cmake

@@ -10,8 +10,10 @@ option(WITH_DBUS "build with D-BUS" ON)
 option(GENERATE_MANPAGES "generate manpages" ON)
 option(COMPRESS_MANPAGES "compress manpages" ON)
 option(GENERATE_DOC "generate API documentation" ON)
-if (GENERATE_DOC AND ENV{DO_COVERAGE})
+option(DO_COVERAGE "build with coverage" OFF)
+if (GENERATE_DOC AND DO_COVERAGE)
     message(STATUS "Not generating API documentation with DO_COVERAGE")
+    set(GENERATE_DOC OFF)
 endif()
 
 # {{{ Endianness
@@ -332,6 +334,7 @@ if(DO_COVERAGE)
                     ${BUILD_DIR}/${file}
                     COPYONLY)
     endforeach()
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -O0 --coverage -fprofile-arcs -ftest-coverage")
 else()
     foreach(file ${AWESOME_CONFIGURE_COPYONLY_WITHCOV_FILES})
         configure_file(${SOURCE_DIR}/${file}

tests/examples/CMakeLists.txt

@@ -29,7 +29,7 @@ else()
     set(TOP_SOURCE_DIR ${CMAKE_SOURCE_DIR})
 endif()
 
-if (DEFINED ENV{DO_COVERAGE} AND NOT $ENV{DO_COVERAGE} STREQUAL "0")
+if (DO_COVERAGE)
   execute_process(
     COMMAND lua -e "require('luacov.runner')('${TOP_SOURCE_DIR}/.luacov')"
     RESULT_VARIABLE TEST_RESULT