From 366c610a5da6f3191e148a21570556997caa852d Mon Sep 17 00:00:00 2001
From: Ruben Kerkhof <ruben@rubenkerkhof.com>
Date: Sat, 24 Jan 2015 23:10:25 +0100
Subject: [PATCH] Add --enable-coverage for coverage instrumentation

---
 .gitignore                 |  3 +++
 configure.ac               |  2 ++
 m4/pdns_enable_coverage.m4 | 17 +++++++++++++++++
 pdns/Makefile.am           |  9 ++++++++-
 4 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 m4/pdns_enable_coverage.m4

diff --git a/.gitignore b/.gitignore
index 1de1b0f53f..9fe812cee9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,3 +42,6 @@ pdns-*.tar.bz2
 .*DS_Store
 *~
 pdns.pid
+*.gcda
+*.gcno
+*.gcov
diff --git a/configure.ac b/configure.ac
index b1972524dc..2c68538448 100644
--- a/configure.ac
+++ b/configure.ac
@@ -306,6 +306,8 @@ AS_IF([test "x$static" != "xyes"], [
   LDFLAGS="$PIE_LDFLAGS $LDFLAGS"
 ])
 
+PDNS_ENABLE_COVERAGE
+
 AC_SUBST(LIBS)
 
 AC_SUBST([AM_CPPFLAGS],
diff --git a/m4/pdns_enable_coverage.m4 b/m4/pdns_enable_coverage.m4
new file mode 100644
index 0000000000..17846ffa16
--- /dev/null
+++ b/m4/pdns_enable_coverage.m4
@@ -0,0 +1,17 @@
+AC_DEFUN([PDNS_ENABLE_COVERAGE], [
+  AC_MSG_CHECKING([whether to enable code coverage])
+  AC_ARG_ENABLE([coverage],
+    AS_HELP_STRING([--enable-coverage],
+      [enable code coverage @<:@default=no@:>@]),
+    [enable_coverage=$enableval],
+    [enable_coverage=no]
+  )
+  AC_MSG_RESULT([$enable_coverage])
+  AS_IF([test "x$enable_coverage" != "xno"], [
+    gl_COMPILER_OPTION_IF([-fprofile-arcs -ftest-coverage], [
+      CXXFLAGS="$CXXFLAGS -U_FORTIFY_SOURCE -g -O0 -fprofile-arcs -ftest-coverage"
+    ], [
+      AC_MSG_ERROR([$CXX does not support gathering coverage data])
+    ])
+  ])
+])
diff --git a/pdns/Makefile.am b/pdns/Makefile.am
index 1f95851879..cf8a56b556 100644
--- a/pdns/Makefile.am
+++ b/pdns/Makefile.am
@@ -48,7 +48,14 @@ BUILT_SOURCES = \
 	version_generated.h \
 	bindparser.h
 
-CLEANFILES = version_generated.h
+CLEANFILES = \
+	version_generated.h \
+	*.gcda \
+	*.gcno \
+	*.gcov \
+	backends/gsql/gsqlbackend.gcda \
+	backends/gsql/gsqlbackend.gcno \
+	backends/gsql/gsqlbackend.gcov
 
 noinst_SCRIPTS = pdns.init
 sysconf_DATA = pdns.conf-dist
-- 
2.47.2