build: enable code coverage

Enable code coverage for the project.  Valgrind not enabled in this
step.

Change-Id: I439d58b23d2bc29d6f602600319074c8fd8c04d6
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/Makefile.am b/Makefile.am
index 3b57953..a5d2779 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,6 +1,32 @@
 ACLOCAL_AMFLAGS = -I m4
 AM_DEFAULT_SOURCE_EXT = .cpp
 
+# Ignore system headers
+CODE_COVERAGE_IGNORE_PATTERN = '/include/*' '/usr/include/*' '$(includedir)/*'
+export CODE_COVERAGE_IGNORE_PATTERN
+
+CODE_COVERAGE_LCOV_SHOPTS = $(CODE_COVERAGE_LCOV_SHOPTS_DEFAULT)
+# Use our configuration file for lcov
+CODE_COVERAGE_LCOV_SHOPTS += --config-file $(abs_srcdir)/.lcovrc
+export CODE_COVERAGE_LCOV_SHOPTS
+
+CODE_COVERAGE_LCOV_OPTIONS = $(CODE_COVERAGE_LCOV_OPTIONS_DEFAULT)
+# Use our configuration file for lcov
+CODE_COVERAGE_LCOV_OPTIONS += --config-file $(abs_srcdir)/.lcovrc
+export CODE_COVERAGE_LCOV_OPTIONS
+
+CODE_COVERAGE_LCOV_RMOPTS = $(CODE_COVERAGE_LCOV_RMOPTS_DEFAULT)
+# Use our configuration file for lcov
+CODE_COVERAGE_LCOV_RMOPTS += --config-file $(abs_srcdir)/.lcovrc
+export CODE_COVERAGE_LCOV_RMOPTS
+
+CODE_COVERAGE_GENHTML_OPTIONS = $(CODE_COVERAGE_GENHTML_OPTIONS_DEFAULT)
+# Use our configuration file for genhtml
+CODE_COVERAGE_GENHTML_OPTIONS += --config-file $(abs_srcdir)/.lcovrc
+# Don't generate the absolute path for each file in the HTML output
+CODE_COVERAGE_GENHTML_OPTIONS += --prefix $(abs_srcdir) --prefix $(abs_builddir)
+export CODE_COVERAGE_GENHTML_OPTIONS
+
 libblobcmdsdir = ${libdir}/ipmid-providers
 libblobcmds_LTLIBRARIES = libblobcmds.la
 libblobcmds_la_SOURCES = \
@@ -18,6 +44,7 @@
 	$(LIBADD_DLOPEN) \
 	$(PHOSPHOR_LOGGING_LIBS) \
 	$(LIBIPMID_LIBS) \
+	$(CODE_COVERAGE_LIBS) \
 	-lstdc++fs \
 	-export-dynamic \
 	-version-info 0:0:0 -shared
@@ -26,6 +53,7 @@
 	$(SYSTEMD_CFLAGS) \
 	$(PHOSPHOR_LOGGING_CFLAGS) \
 	$(LIBIPMID_CFLAGS) \
+	$(CODE_COVERAGE_CXXFLAGS) \
 	-flto
 
 nobase_include_HEADERS = \
@@ -43,9 +71,11 @@
 libblobexample_la_SOURCES = example/example.cpp
 libblobexample_la_LDFLAGS = \
 	$(PHOSPHOR_LOGGING_LIBS) \
+	$(CODE_COVERAGE_LIBS) \
 	-version-info 0:0:0 -shared
 libblobexample_la_CXXFLAGS = \
 	$(PHOSPHOR_LOGGING_CFLAGS) \
+	$(CODE_COVERAGE_CXXFLAGS) \
 	-flto
 
 SUBDIRS = . test