# ===========================================================================

 #     http://www.gnu.org/software/autoconf-archive/ax_code_coverage.html

 # ===========================================================================

 #

 # SYNOPSIS

 #

 #   AX_CODE_COVERAGE()

 #

 # DESCRIPTION

 #

 #   Defines CODE_COVERAGE_CPPFLAGS, CODE_COVERAGE_CFLAGS,

 #   CODE_COVERAGE_CXXFLAGS and CODE_COVERAGE_LDFLAGS which should be

 #   included in the CPPFLAGS, CFLAGS CXXFLAGS and LIBS/LDFLAGS variables of

 #   every build target (program or library) which should be built with code

 #   coverage support. Also defines CODE_COVERAGE_RULES which should be

 #   substituted in your Makefile; and $enable_code_coverage which can be

 #   used in subsequent configure output. CODE_COVERAGE_ENABLED is defined

 #   and substituted, and corresponds to the value of the

 #   --enable-code-coverage option, which defaults to being disabled.

 #

 #   Test also for gcov program and create GCOV variable that could be

 #   substituted.

 #

 #   Note that all optimisation flags in CFLAGS must be disabled when code

 #   coverage is enabled.

 #

 #   Usage example:

 #

 #   configure.ac:

 #

 #     AX_CODE_COVERAGE

 #

 #   Makefile.am:

 #

 #     @CODE_COVERAGE_RULES@

 #     my_program_LIBS = ... $(CODE_COVERAGE_LDFLAGS) ...

 #     my_program_CPPFLAGS = ... $(CODE_COVERAGE_CPPFLAGS) ...

 #     my_program_CFLAGS = ... $(CODE_COVERAGE_CFLAGS) ...

 #     my_program_CXXFLAGS = ... $(CODE_COVERAGE_CXXFLAGS) ...

 #

 #   This results in a "check-code-coverage" rule being added to any

 #   Makefile.am which includes "@CODE_COVERAGE_RULES@" (assuming the module

 #   has been configured with --enable-code-coverage). Running `make

 #   check-code-coverage` in that directory will run the module's test suite

 #   (`make check`) and build a code coverage report detailing the code which

 #   was touched, then print the URI for the report.

 #

 #   This code was derived from Makefile.decl in GLib, originally licenced

 #   under LGPLv2.1+.

 #

 # LICENSE

 #

 #   Copyright (c) 2012, 2016 Philip Withnall

 #   Copyright (c) 2012 Xan Lopez

 #   Copyright (c) 2012 Christian Persch

 #   Copyright (c) 2012 Paolo Borelli

 #   Copyright (c) 2012 Dan Winship

 #   Copyright (c) 2015 Bastien ROUCARIES

 #

 #   This library is free software; you can redistribute it and/or modify it

 #   under the terms of the GNU Lesser General Public License as published by

 #   the Free Software Foundation; either version 2.1 of the License, or (at

 #   your option) any later version.

 #

 #   This library is distributed in the hope that it will be useful, but

 #   WITHOUT ANY WARRANTY; without even the implied warranty of

 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser

 #   General Public License for more details.

 #

 #   You should have received a copy of the GNU Lesser General Public License

 #   along with this program. If not, see <http://www.gnu.org/licenses/>.

 #serial 16

 AC_DEFUN([AX_CODE_COVERAGE],[

 	dnl Check for --enable-code-coverage

 	AC_REQUIRE([AC_PROG_SED])

 	# allow to override gcov location

 	AC_ARG_WITH([gcov],

 	  [AS_HELP_STRING([--with-gcov[=GCOV]], [use given GCOV for coverage (GCOV=gcov).])],

 	  [_AX_CODE_COVERAGE_GCOV_PROG_WITH=$with_gcov],

 	  [_AX_CODE_COVERAGE_GCOV_PROG_WITH=gcov])

 	AC_MSG_CHECKING([whether to build with code coverage support])

 	AC_ARG_ENABLE([code-coverage],

 	  AS_HELP_STRING([--enable-code-coverage],

 	  [Whether to enable code coverage support]),,

 	  enable_code_coverage=no)

 	AM_CONDITIONAL([CODE_COVERAGE_ENABLED], [test x$enable_code_coverage = xyes])

 	AC_SUBST([CODE_COVERAGE_ENABLED], [$enable_code_coverage])

 	AC_MSG_RESULT($enable_code_coverage)

 	AS_IF([ test "$enable_code_coverage" = "yes" ], [

 		# check for gcov

 		AC_CHECK_TOOL([GCOV],

 		  [$_AX_CODE_COVERAGE_GCOV_PROG_WITH],

 		  [:])

 		AS_IF([test "X$GCOV" = "X:"],

 		  [AC_MSG_ERROR([gcov is needed to do coverage])])

 		AC_SUBST([GCOV])

 		dnl Check if gcc is being used

 		AS_IF([ test "$GCC" = "no" ], [

 			AC_MSG_ERROR([not compiling with gcc, which is required for gcov code coverage])

 		])

 		# List of supported lcov versions.

 		lcov_version_list="1.6 1.7 1.8 1.9 1.10 1.11 1.12"

 		AC_CHECK_PROG([LCOV], [lcov], [lcov])

 		AC_CHECK_PROG([GENHTML], [genhtml], [genhtml])

 		AS_IF([ test "$LCOV" ], [

 			AC_CACHE_CHECK([for lcov version], ax_cv_lcov_version, [

 				ax_cv_lcov_version=invalid

 				lcov_version=`$LCOV -v 2>/dev/null | $SED -e 's/^.* //'`

 				for lcov_check_version in $lcov_version_list; do

 					if test "$lcov_version" = "$lcov_check_version"; then

 						ax_cv_lcov_version="$lcov_check_version (ok)"

 					fi

 				done

 			])

 		], [

 			lcov_msg="To enable code coverage reporting you must have one of the following lcov versions installed: $lcov_version_list"

 			AC_MSG_ERROR([$lcov_msg])

 		])

 		case $ax_cv_lcov_version in

 			""|invalid[)]

 				lcov_msg="You must have one of the following versions of lcov: $lcov_version_list (found: $lcov_version)."

 				AC_MSG_ERROR([$lcov_msg])

 				LCOV="exit 0;"

 			;;

 		esac

 		AS_IF([ test -z "$GENHTML" ], [

 			AC_MSG_ERROR([Could not find genhtml from the lcov package])

 		])

 		dnl Build the code coverage flags

 		CODE_COVERAGE_CPPFLAGS="-DNDEBUG"

 		CODE_COVERAGE_CFLAGS="-O0 -g -fprofile-arcs -ftest-coverage"

 		CODE_COVERAGE_CXXFLAGS="-O0 -g -fprofile-arcs -ftest-coverage"

 		CODE_COVERAGE_LDFLAGS="-lgcov"

 		AC_SUBST([CODE_COVERAGE_CPPFLAGS])

 		AC_SUBST([CODE_COVERAGE_CFLAGS])

 		AC_SUBST([CODE_COVERAGE_CXXFLAGS])

 		AC_SUBST([CODE_COVERAGE_LDFLAGS])

 	])

 [CODE_COVERAGE_RULES='

 # Code coverage

 #

 # Optional:

 #  - CODE_COVERAGE_DIRECTORY: Top-level directory for code coverage reporting.

 #    Multiple directories may be specified, separated by whitespace.

 #    (Default: $(top_builddir))

 #  - CODE_COVERAGE_OUTPUT_FILE: Filename and path for the .info file generated

 #    by lcov for code coverage. (Default:

 #    $(PACKAGE_NAME)-$(PACKAGE_VERSION)-coverage.info)

 #  - CODE_COVERAGE_OUTPUT_DIRECTORY: Directory for generated code coverage

 #    reports to be created. (Default:

 #    $(PACKAGE_NAME)-$(PACKAGE_VERSION)-coverage)

 #  - CODE_COVERAGE_BRANCH_COVERAGE: Set to 1 to enforce branch coverage,

 #    set to 0 to disable it and leave empty to stay with the default.

 #    (Default: empty)

 #  - CODE_COVERAGE_LCOV_SHOPTS_DEFAULT: Extra options shared between both lcov

 #    instances. (Default: based on $CODE_COVERAGE_BRANCH_COVERAGE)

 #  - CODE_COVERAGE_LCOV_SHOPTS: Extra options to shared between both lcov

 #    instances. (Default: $CODE_COVERAGE_LCOV_SHOPTS_DEFAULT)

 #  - CODE_COVERAGE_LCOV_OPTIONS_GCOVPATH: --gcov-tool pathtogcov

 #  - CODE_COVERAGE_LCOV_OPTIONS_DEFAULT: Extra options to pass to the

 #    collecting lcov instance. (Default: $CODE_COVERAGE_LCOV_OPTIONS_GCOVPATH)

 #  - CODE_COVERAGE_LCOV_OPTIONS: Extra options to pass to the collecting lcov

 #    instance. (Default: $CODE_COVERAGE_LCOV_OPTIONS_DEFAULT)

 #  - CODE_COVERAGE_LCOV_RMOPTS_DEFAULT: Extra options to pass to the filtering

 #    lcov instance. (Default: empty)

 #  - CODE_COVERAGE_LCOV_RMOPTS: Extra options to pass to the filtering lcov

 #    instance. (Default: $CODE_COVERAGE_LCOV_RMOPTS_DEFAULT)

 #  - CODE_COVERAGE_GENHTML_OPTIONS_DEFAULT: Extra options to pass to the

 #    genhtml instance. (Default: based on $CODE_COVERAGE_BRANCH_COVERAGE)

 #  - CODE_COVERAGE_GENHTML_OPTIONS: Extra options to pass to the genhtml

 #    instance. (Default: $CODE_COVERAGE_GENHTML_OPTIONS_DEFAULT)

 #  - CODE_COVERAGE_IGNORE_PATTERN: Extra glob pattern of files to ignore

 #

 # The generated report will be titled using the $(PACKAGE_NAME) and

 # $(PACKAGE_VERSION). In order to add the current git hash to the title,

 # use the git-version-gen script, available online.

 # Optional variables

 CODE_COVERAGE_DIRECTORY ?= $(top_builddir)

 CODE_COVERAGE_OUTPUT_FILE ?= $(PACKAGE_NAME)-$(PACKAGE_VERSION)-coverage.info

 CODE_COVERAGE_OUTPUT_DIRECTORY ?= $(PACKAGE_NAME)-$(PACKAGE_VERSION)-coverage

 CODE_COVERAGE_BRANCH_COVERAGE ?=

 CODE_COVERAGE_LCOV_SHOPTS_DEFAULT ?= $(if $(CODE_COVERAGE_BRANCH_COVERAGE),\

 --rc lcov_branch_coverage=$(CODE_COVERAGE_BRANCH_COVERAGE))

 CODE_COVERAGE_LCOV_SHOPTS ?= $(CODE_COVERAGE_LCOV_SHOPTS_DEFAULT)

 CODE_COVERAGE_LCOV_OPTIONS_GCOVPATH ?= --gcov-tool "$(GCOV)"

 CODE_COVERAGE_LCOV_OPTIONS_DEFAULT ?= $(CODE_COVERAGE_LCOV_OPTIONS_GCOVPATH)

 CODE_COVERAGE_LCOV_OPTIONS ?= $(CODE_COVERAGE_LCOV_OPTIONS_DEFAULT)

 CODE_COVERAGE_LCOV_RMOPTS_DEFAULT ?=

 CODE_COVERAGE_LCOV_RMOPTS ?= $(CODE_COVERAGE_LCOV_RMOPTS_DEFAULT)

 CODE_COVERAGE_GENHTML_OPTIONS_DEFAULT ?=\

 $(if $(CODE_COVERAGE_BRANCH_COVERAGE),\

 --rc genhtml_branch_coverage=$(CODE_COVERAGE_BRANCH_COVERAGE))

 CODE_COVERAGE_GENHTML_OPTIONS ?= $(CODE_COVERAGE_GENHTML_OPTIONS_DEFAULTS)

 CODE_COVERAGE_IGNORE_PATTERN ?=

 code_coverage_v_lcov_cap = $(code_coverage_v_lcov_cap_$(V))

 code_coverage_v_lcov_cap_ = $(code_coverage_v_lcov_cap_$(AM_DEFAULT_VERBOSITY))

 code_coverage_v_lcov_cap_0 = @echo "  LCOV   --capture"\

  $(CODE_COVERAGE_OUTPUT_FILE);

 code_coverage_v_lcov_ign = $(code_coverage_v_lcov_ign_$(V))

 code_coverage_v_lcov_ign_ = $(code_coverage_v_lcov_ign_$(AM_DEFAULT_VERBOSITY))

 code_coverage_v_lcov_ign_0 = @echo "  LCOV   --remove /tmp/*"\

  $(CODE_COVERAGE_IGNORE_PATTERN);

 code_coverage_v_genhtml = $(code_coverage_v_genhtml_$(V))

 code_coverage_v_genhtml_ = $(code_coverage_v_genhtml_$(AM_DEFAULT_VERBOSITY))

 code_coverage_v_genhtml_0 = @echo "  GEN   " $(CODE_COVERAGE_OUTPUT_DIRECTORY);

 code_coverage_quiet = $(code_coverage_quiet_$(V))

 code_coverage_quiet_ = $(code_coverage_quiet_$(AM_DEFAULT_VERBOSITY))

 code_coverage_quiet_0 = --quiet

 # sanitizes the test-name: replaces with underscores: dashes and dots

 code_coverage_sanitize = $(subst -,_,$(subst .,_,$(1)))

 # Use recursive makes in order to ignore errors during check

 check-code-coverage:

 ifeq ($(CODE_COVERAGE_ENABLED),yes)

 	-$(A''M_V_at)$(MAKE) $(AM_MAKEFLAGS) -k check

 	$(A''M_V_at)$(MAKE) $(AM_MAKEFLAGS) code-coverage-capture

 else

 	@echo "Need to reconfigure with --enable-code-coverage"

 endif

 # Capture code coverage data

 code-coverage-capture: code-coverage-capture-hook

 ifeq ($(CODE_COVERAGE_ENABLED),yes)

 	$(code_coverage_v_lcov_cap)$(LCOV) $(code_coverage_quiet) $(addprefix --directory ,$(CODE_COVERAGE_DIRECTORY)) --capture --output-file "$(CODE_COVERAGE_OUTPUT_FILE).tmp" --test-name "$(call code_coverage_sanitize,$(PACKAGE_NAME)-$(PACKAGE_VERSION))" --no-checksum --compat-libtool $(CODE_COVERAGE_LCOV_SHOPTS) $(CODE_COVERAGE_LCOV_OPTIONS)

 	$(code_coverage_v_lcov_ign)$(LCOV) $(code_coverage_quiet) $(addprefix --directory ,$(CODE_COVERAGE_DIRECTORY)) --remove "$(CODE_COVERAGE_OUTPUT_FILE).tmp" "/tmp/*" $(CODE_COVERAGE_IGNORE_PATTERN) --output-file "$(CODE_COVERAGE_OUTPUT_FILE)" $(CODE_COVERAGE_LCOV_SHOPTS) $(CODE_COVERAGE_LCOV_RMOPTS)

 	-@rm -f $(CODE_COVERAGE_OUTPUT_FILE).tmp

 	$(code_coverage_v_genhtml)LANG=C $(GENHTML) $(code_coverage_quiet) $(addprefix --prefix ,$(CODE_COVERAGE_DIRECTORY)) --output-directory "$(CODE_COVERAGE_OUTPUT_DIRECTORY)" --title "$(PACKAGE_NAME)-$(PACKAGE_VERSION) Code Coverage" --legend --show-details "$(CODE_COVERAGE_OUTPUT_FILE)" $(CODE_COVERAGE_GENHTML_OPTIONS)

 	@echo "file://$(abs_builddir)/$(CODE_COVERAGE_OUTPUT_DIRECTORY)/index.html"

 else

 	@echo "Need to reconfigure with --enable-code-coverage"

 endif

 # Hook rule executed before code-coverage-capture, overridable by the user

 code-coverage-capture-hook:

 ifeq ($(CODE_COVERAGE_ENABLED),yes)

 clean: code-coverage-clean

 distclean: code-coverage-clean

 code-coverage-clean:

 	-$(LCOV) --directory $(top_builddir) -z

 	-rm -rf $(CODE_COVERAGE_OUTPUT_FILE) $(CODE_COVERAGE_OUTPUT_FILE).tmp $(CODE_COVERAGE_OUTPUT_DIRECTORY)

 	-find . \( -name "*.gcda" -o -name "*.gcno" -o -name "*.gcov" \) -delete

 endif

 GITIGNOREFILES ?=

 GITIGNOREFILES += $(CODE_COVERAGE_OUTPUT_FILE) $(CODE_COVERAGE_OUTPUT_DIRECTORY)

 A''M_DISTCHECK_CONFIGURE_FLAGS ?=

 A''M_DISTCHECK_CONFIGURE_FLAGS += --disable-code-coverage

 .PHONY: check-code-coverage code-coverage-capture code-coverage-capture-hook code-coverage-clean

 ']

 	AC_SUBST([CODE_COVERAGE_RULES])

 	m4_ifdef([_AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE([CODE_COVERAGE_RULES])])

 ])