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+# This file is part of CMake-codecov.
+#
+# Copyright (c)
+# 2015-2016 RWTH Aachen University, Federal Republic of Germany
+#
+# See the LICENSE file in the package base directory for details
+#
+# Written by Alexander Haase, alexander.haase@rwth-aachen.de
+#
+
+
+# include required Modules
+include(FindPackageHandleStandardArgs)
+
+
+# Search for gcov binary.
+set(CMAKE_REQUIRED_QUIET_SAVE ${CMAKE_REQUIRED_QUIET})
+set(CMAKE_REQUIRED_QUIET ${codecov_FIND_QUIETLY})
+
+get_property(ENABLED_LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES)
+foreach (LANG ${ENABLED_LANGUAGES})
+ # Gcov evaluation is dependend on the used compiler. Check gcov support for
+ # each compiler that is used. If gcov binary was already found for this
+ # compiler, do not try to find it again.
+ if (NOT GCOV_${CMAKE_${LANG}_COMPILER_ID}_BIN)
+ get_filename_component(COMPILER_PATH "${CMAKE_${LANG}_COMPILER}" PATH)
+
+ if ("${CMAKE_${LANG}_COMPILER_ID}" STREQUAL "GNU")
+ # Some distributions like OSX (homebrew) ship gcov with the compiler
+ # version appended as gcov-x. To find this binary we'll build the
+ # suggested binary name with the compiler version.
+ string(REGEX MATCH "^[0-9]+" GCC_VERSION
+ "${CMAKE_${LANG}_COMPILER_VERSION}")
+
+ find_program(GCOV_BIN NAMES gcov-${GCC_VERSION} gcov
+ HINTS ${COMPILER_PATH})
+
+ elseif ("${CMAKE_${LANG}_COMPILER_ID}" STREQUAL "Clang")
+ # Some distributions like Debian ship llvm-cov with the compiler
+ # version appended as llvm-cov-x.y. To find this binary we'll build
+ # the suggested binary name with the compiler version.
+ string(REGEX MATCH "^[0-9]+.[0-9]+" LLVM_VERSION
+ "${CMAKE_${LANG}_COMPILER_VERSION}")
+
+ # llvm-cov prior version 3.5 seems to be not working with coverage
+ # evaluation tools, but these versions are compatible with the gcc
+ # gcov tool.
+ if(LLVM_VERSION VERSION_GREATER 3.4)
+ find_program(LLVM_COV_BIN NAMES "llvm-cov-${LLVM_VERSION}"
+ "llvm-cov" HINTS ${COMPILER_PATH})
+ mark_as_advanced(LLVM_COV_BIN)
+
+ if (LLVM_COV_BIN)
+ find_program(LLVM_COV_WRAPPER "llvm-cov-wrapper" PATHS
+ ${CMAKE_MODULE_PATH})
+ if (LLVM_COV_WRAPPER)
+ set(GCOV_BIN "${LLVM_COV_WRAPPER}" CACHE FILEPATH "")
+
+ # set additional parameters
+ set(GCOV_${CMAKE_${LANG}_COMPILER_ID}_ENV
+ "LLVM_COV_BIN=${LLVM_COV_BIN}" CACHE STRING
+ "Environment variables for llvm-cov-wrapper.")
+ mark_as_advanced(GCOV_${CMAKE_${LANG}_COMPILER_ID}_ENV)
+ endif ()
+ endif ()
+ endif ()
+
+ if (NOT GCOV_BIN)
+ # Fall back to gcov binary if llvm-cov was not found or is
+ # incompatible. This is the default on OSX, but may crash on
+ # recent Linux versions.
+ find_program(GCOV_BIN gcov HINTS ${COMPILER_PATH})
+ endif ()
+ endif ()
+
+
+ if (GCOV_BIN)
+ set(GCOV_${CMAKE_${LANG}_COMPILER_ID}_BIN "${GCOV_BIN}" CACHE STRING
+ "${LANG} gcov binary.")
+
+ if (NOT CMAKE_REQUIRED_QUIET)
+ message("-- Found gcov evaluation for "
+ "${CMAKE_${LANG}_COMPILER_ID}: ${GCOV_BIN}")
+ endif()
+
+ unset(GCOV_BIN CACHE)
+ endif ()
+ endif ()
+endforeach ()
+
+
+
+
+# Add a new global target for all gcov targets. This target could be used to
+# generate the gcov files for the whole project instead of calling <TARGET>-gcov
+# for each target.
+if (NOT TARGET gcov)
+ add_custom_target(gcov)
+endif (NOT TARGET gcov)
+
+
+
+# This function will add gcov evaluation for target <TNAME>. Only sources of
+# this target will be evaluated and no dependencies will be added. It will call
+# Gcov on any source file of <TNAME> once and store the gcov file in the same
+# directory.
+function (add_gcov_target TNAME)
+ set(TDIR ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/${TNAME}.dir)
+
+ # We don't have to check, if the target has support for coverage, thus this
+ # will be checked by add_coverage_target in Findcoverage.cmake. Instead we
+ # have to determine which gcov binary to use.
+ get_target_property(TSOURCES ${TNAME} SOURCES)
+ set(SOURCES "")
+ set(TCOMPILER "")
+ foreach (FILE ${TSOURCES})
+ codecov_path_of_source(${FILE} FILE)
+ if (NOT "${FILE}" STREQUAL "")
+ codecov_lang_of_source(${FILE} LANG)
+ if (NOT "${LANG}" STREQUAL "")
+ list(APPEND SOURCES "${FILE}")
+ set(TCOMPILER ${CMAKE_${LANG}_COMPILER_ID})
+ endif ()
+ endif ()
+ endforeach ()
+
+ # If no gcov binary was found, coverage data can't be evaluated.
+ if (NOT GCOV_${TCOMPILER}_BIN)
+ message(WARNING "No coverage evaluation binary found for ${TCOMPILER}.")
+ return()
+ endif ()
+
+ set(GCOV_BIN "${GCOV_${TCOMPILER}_BIN}")
+ set(GCOV_ENV "${GCOV_${TCOMPILER}_ENV}")
+
+
+ set(BUFFER "")
+ foreach(FILE ${SOURCES})
+ get_filename_component(FILE_PATH "${TDIR}/${FILE}" PATH)
+
+ # call gcov
+ add_custom_command(OUTPUT ${TDIR}/${FILE}.gcov
+ COMMAND ${GCOV_ENV} ${GCOV_BIN} ${TDIR}/${FILE}.gcno > /dev/null
+ DEPENDS ${TNAME} ${TDIR}/${FILE}.gcno
+ WORKING_DIRECTORY ${FILE_PATH}
+ )
+
+ list(APPEND BUFFER ${TDIR}/${FILE}.gcov)
+ endforeach()
+
+
+ # add target for gcov evaluation of <TNAME>
+ add_custom_target(${TNAME}-gcov DEPENDS ${BUFFER})
+
+ # add evaluation target to the global gcov target.
+ add_dependencies(gcov ${TNAME}-gcov)
+endfunction (add_gcov_target)