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# This file is part of CMake-codecov.
#
# Copyright (c)
# 2015-2017 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 ${ENABLED_LANGUAGES})
# Gcov evaluation is dependent on the used compiler. Check gcov support for
# each compiler that is used. If gcov binary was already found for this
# compiler, do not try to find it again.
if (NOT GCOV_${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)
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