[tepl] build: copy ax_code_coverage.m4 from autoconf-archive git master

[Sébastien Wilmet <swilmet src gnome org>]

commit a217c23564e9c7a9dbc294a73228821a76d19262
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Nov 5 11:47:55 2019 +0100

    build: copy ax_code_coverage.m4 from autoconf-archive git master
    
    See the previous commit, there are bug fixes in ax_code_coverage.m4 that
    are not yet included in a stable version of autoconf-archive.
    
    The bug was:
    Makefile:454: *** Recursive variable 'GITIGNOREFILES' references itself (eventually).  Stop.

 m4/ax_code_coverage.m4 | 272 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 272 insertions(+)
---
diff --git a/m4/ax_code_coverage.m4 b/m4/ax_code_coverage.m4
new file mode 100644
index 0000000..352165b
--- /dev/null
+++ b/m4/ax_code_coverage.m4
@@ -0,0 +1,272 @@
+# ===========================================================================
+#     https://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_LIBS which should be included
+#   in the CPPFLAGS, CFLAGS CXXFLAGS and LIBS/LIBADD variables of every
+#   build target (program or library) which should be built with code
+#   coverage support. Also add rules using AX_ADD_AM_MACRO_STATIC; 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 optimization flags in CFLAGS must be disabled when code
+#   coverage is enabled.
+#
+#   Usage example:
+#
+#   configure.ac:
+#
+#     AX_CODE_COVERAGE
+#
+#   Makefile.am:
+#
+#     include $(top_srcdir)/aminclude_static.am
+#
+#     my_program_LIBS = ... $(CODE_COVERAGE_LIBS) ...
+#     my_program_CPPFLAGS = ... $(CODE_COVERAGE_CPPFLAGS) ...
+#     my_program_CFLAGS = ... $(CODE_COVERAGE_CFLAGS) ...
+#     my_program_CXXFLAGS = ... $(CODE_COVERAGE_CXXFLAGS) ...
+#
+#     clean-local: code-coverage-clean
+#     distclean-local: code-coverage-dist-clean
+#
+#   This results in a "check-code-coverage" rule being added to any
+#   Makefile.am which do "include $(top_srcdir)/aminclude_static.am"
+#   (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 licensed
+#   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) 2015,2018 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 <https://www.gnu.org/licenses/>.
+
+#serial 34
+
+m4_define(_AX_CODE_COVERAGE_RULES,[
+AX_ADD_AM_MACRO_STATIC([
+# 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
+# run only on top dir
+if CODE_COVERAGE_ENABLED
+ ifeq (\$(abs_builddir), \$(abs_top_builddir))
+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_DEFAULT)
+CODE_COVERAGE_IGNORE_PATTERN ?=
+
+GITIGNOREFILES := \$(GITIGNOREFILES) \$(CODE_COVERAGE_OUTPUT_FILE) \$(CODE_COVERAGE_OUTPUT_DIRECTORY)
+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:
+       -\$(AM_V_at)\$(MAKE) \$(AM_MAKEFLAGS) -k check
+       \$(AM_V_at)\$(MAKE) \$(AM_MAKEFLAGS) code-coverage-capture
+
+# Capture code coverage data
+code-coverage-capture: code-coverage-capture-hook
+       \$(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\"
+
+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
+
+code-coverage-dist-clean:
+
+A][M_DISTCHECK_CONFIGURE_FLAGS := \$(A][M_DISTCHECK_CONFIGURE_FLAGS) --disable-code-coverage
+ else # ifneq (\$(abs_builddir), \$(abs_top_builddir))
+check-code-coverage:
+
+code-coverage-capture: code-coverage-capture-hook
+
+code-coverage-clean:
+
+code-coverage-dist-clean:
+ endif # ifeq (\$(abs_builddir), \$(abs_top_builddir))
+else #! CODE_COVERAGE_ENABLED
+# Use recursive makes in order to ignore errors during check
+check-code-coverage:
+       @echo \"Need to reconfigure with --enable-code-coverage\"
+# Capture code coverage data
+code-coverage-capture: code-coverage-capture-hook
+       @echo \"Need to reconfigure with --enable-code-coverage\"
+
+code-coverage-clean:
+
+code-coverage-dist-clean:
+
+endif #CODE_COVERAGE_ENABLED
+# Hook rule executed before code-coverage-capture, overridable by the user
+code-coverage-capture-hook:
+
+.PHONY: check-code-coverage code-coverage-capture code-coverage-dist-clean code-coverage-clean 
code-coverage-capture-hook
+])
+])
+
+AC_DEFUN([_AX_CODE_COVERAGE_ENABLED],[
+       AX_CHECK_GNU_MAKE([],[AC_MSG_ERROR([not using GNU make that is needed for coverage])])
+       AC_REQUIRE([AX_ADD_AM_MACRO_STATIC])
+       # 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])
+             ])
+
+       AC_CHECK_PROG([LCOV], [lcov], [lcov])
+       AC_CHECK_PROG([GENHTML], [genhtml], [genhtml])
+
+       AS_IF([ test x"$LCOV" = x ], [
+               AC_MSG_ERROR([To enable code coverage reporting you must have lcov installed])
+             ])
+
+       AS_IF([ test x"$GENHTML" = x ], [
+               AC_MSG_ERROR([Could not find genhtml from the lcov package])
+       ])
+
+       dnl Build the code coverage flags
+       dnl Define CODE_COVERAGE_LDFLAGS for backwards compatibility
+       CODE_COVERAGE_CPPFLAGS="-DNDEBUG"
+       CODE_COVERAGE_CFLAGS="-O0 -g -fprofile-arcs -ftest-coverage"
+       CODE_COVERAGE_CXXFLAGS="-O0 -g -fprofile-arcs -ftest-coverage"
+       CODE_COVERAGE_LIBS="-lgcov"
+
+       AC_SUBST([CODE_COVERAGE_CPPFLAGS])
+       AC_SUBST([CODE_COVERAGE_CFLAGS])
+       AC_SUBST([CODE_COVERAGE_CXXFLAGS])
+       AC_SUBST([CODE_COVERAGE_LIBS])
+])
+
+AC_DEFUN([AX_CODE_COVERAGE],[
+       dnl Check for --enable-code-coverage
+
+       # 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 "x$enable_code_coverage" = xyes ], [
+               _AX_CODE_COVERAGE_ENABLED
+             ])
+
+       _AX_CODE_COVERAGE_RULES
+])