From cbc9ec23b0fb551f20f4fd8ca46d98f59b5666bc Mon Sep 17 00:00:00 2001
From: David Kalnischkies <david@kalnischkies.de>
Date: Sun, 13 Apr 2014 21:40:35 +0200
Subject: compile with absolute paths to allow lcov use
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Instructing gcc (or clang) to prepare for capturing coverage data is
easy: Just build with: CXXFLAGS=--coverage

The hard part is that our buildsystem uses relative paths and so
confuses the hell out of lcov as it assumes this way that all our *.cc
files are in the same directory… by changing to absolute paths in the
compile rules we solve this problem.

Still not perfect as it refers to build/include files for most headers
and our forking/threading code isn't properly captured, but good enough
to see red reports for now:

CXXFLAGS=--coverage make
make test
./test/integration/run-tests -q
lcov --no-external --directory . --capture --output-file apt.info
genhtml --output-directory ./coverage/ apt.info

Git-Dch: Ignore
---
 buildlib/library.mak       | 2 +-
 buildlib/program.mak       | 2 +-
 buildlib/python.mak        | 2 +-
 buildlib/staticlibrary.mak | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/buildlib/library.mak b/buildlib/library.mak
index ef1306b66..cc0286d7e 100644
--- a/buildlib/library.mak
+++ b/buildlib/library.mak
@@ -63,7 +63,7 @@ $(LIB)/lib$(LIBRARY).so.$(MAJOR).$(MINOR): $($(LOCAL)-HEADERS) $($(LOCAL)-OBJS)
 vpath %.cc $(SUBDIRS)
 $(OBJ)/%.opic: %.cc $(LIBRARYDEPENDS)
 	echo Compiling $< to $@
-	$(CXX) -c $(INLINEDEPFLAG) $(CPPFLAGS) $(CXXFLAGS) $(PICFLAGS) -o $@ $<
+	$(CXX) -c $(INLINEDEPFLAG) $(CPPFLAGS) $(CXXFLAGS) $(PICFLAGS) -o $@ $(abspath $<)
 	$(DoDep)
 
 # Include the dependencies that are available
diff --git a/buildlib/program.mak b/buildlib/program.mak
index da538f5eb..71c265f39 100644
--- a/buildlib/program.mak
+++ b/buildlib/program.mak
@@ -50,7 +50,7 @@ $($(LOCAL)-BIN): $($(LOCAL)-OBJS) $($(LOCAL)-MKS)
 vpath %.cc $(SUBDIRS)
 $(OBJ)/%.o: %.cc
 	echo Compiling $< to $@
-	$(CXX) -c $(INLINEDEPFLAG) $(CPPFLAGS) $(CXXFLAGS) -o $@ $<
+	$(CXX) -c $(INLINEDEPFLAG) $(CPPFLAGS) $(CXXFLAGS) -o $@ $(abspath $<)
 	$(DoDep)
 
 # Include the dependencies that are available
diff --git a/buildlib/python.mak b/buildlib/python.mak
index 02345c2d2..f08ab5563 100644
--- a/buildlib/python.mak
+++ b/buildlib/python.mak
@@ -58,7 +58,7 @@ endif  # ifdef PYTHONLIB
 vpath %.cc $(SUBDIRS)
 $(OBJ)/%.opic: %.cc
 	echo Compiling $< to $@
-	$(CXX) -c $(INLINEDEPFLAG) $(CPPFLAGS) $(CXXFLAGS) $(PICFLAGS) -o $@ $<
+	$(CXX) -c $(INLINEDEPFLAG) $(CPPFLAGS) $(CXXFLAGS) $(PICFLAGS) -o $@ $(abspath $<)
 	$(DoDep)
 
 # Include the dependencies that are available
diff --git a/buildlib/staticlibrary.mak b/buildlib/staticlibrary.mak
index ce9259dc0..86908700f 100644
--- a/buildlib/staticlibrary.mak
+++ b/buildlib/staticlibrary.mak
@@ -50,7 +50,7 @@ endif
 vpath %.cc $(SUBDIRS)
 $(OBJ)/%.o: %.cc
 	echo Compiling $< to $@
-	$(CXX) -c $(INLINEDEPFLAG) $(CPPFLAGS) $(CXXFLAGS) -o $@ $<
+	$(CXX) -c $(INLINEDEPFLAG) $(CPPFLAGS) $(CXXFLAGS) -o $@ $(abspath $<)
 	$(DoDep)
 
 # Include the dependencies that are available
-- 
cgit v1.2.3