Removed libdwarf build dependency

Building libbacktrace is actually hard, since (a) there is no pkg-config
available for libdwarf, and (b) there's both libdwarf and libdw providing
dwarf.h.

Since we just need a couple of #defines, it is way easier to define those
ourselves than dealing with this config mess.

Change-Id: Ib1d8e88fe6104827fe3a2bcc5e8c1ff9f52f00df
Reviewed-by: Bernd Weimer <bernd.weimer@pelagicore.com>
Reviewed-by: Dominik Holland <dominik.holland@pelagicore.com>

6 files changed, 74 insertions, 76 deletions

diff --git a/3rdparty/libbacktrace/auxincl/dwarf2.h b/3rdparty/libbacktrace/auxincl/dwarf2.h
index 77da76ff..205df8d2 100644
--- a/3rdparty/libbacktrace/auxincl/dwarf2.h
+++ b/3rdparty/libbacktrace/auxincl/dwarf2.h
@@ -32,26 +32,78 @@ POSSIBILITY OF SUCH DAMAGE.  */
 #ifndef BACKTRACE_AUX_DWARF2_H
 #define BACKTRACE_AUX_DWARF2_H
 
-/* Use the system header for the bulk of the definitions.  */
-#ifdef HAVE_LIBDWARF_DWARF_H
-#include <libdwarf/dwarf.h>
-#else
-#include <dwarf.h>
-#endif
-
 /* Provide stub enum tags.  */
 enum dwarf_attribute {_dummy_dwarf_attribute};
 enum dwarf_form {_dummy_dwarf_form};
 enum dwarf_tag {_dummy_dwarf_tag};
 
-/* Define potentially missing enum values.  */
+#define DW_AT_abstract_origin 0x31
+#define DW_AT_call_file 0x58
+#define DW_AT_call_line 0x59
+#define DW_AT_comp_dir 0x1b
+#define DW_AT_high_pc 0x12
+#define DW_AT_linkage_name 0x6e
+#define DW_AT_low_pc 0x11
+#define DW_AT_MIPS_linkage_name 0x2007
+#define DW_AT_name 0x03
+#define DW_AT_namelist_item 0x44
+#define DW_AT_ranges 0x55
+#define DW_AT_ranges_base 0x74
+#define DW_AT_specification 0x47
+#define DW_AT_stmt_list 0x10
+#define DW_FORM_addr 0x01
+#define DW_FORM_addrx 0x1b
+#define DW_FORM_block 0x09
+#define DW_FORM_block1 0x0a
+#define DW_FORM_block2 0x03
+#define DW_FORM_block4 0x04
+#define DW_FORM_data1 0x0b
+#define DW_FORM_data16 0x1e
+#define DW_FORM_data2 0x05
+#define DW_FORM_data4 0x06
+#define DW_FORM_data8 0x07
+#define DW_FORM_exprloc 0x18
+#define DW_FORM_flag 0x0c
+#define DW_FORM_flag_present 0x19
 #define DW_FORM_GNU_addr_index 0x1f01
-#define DW_FORM_GNU_str_index  0x1f02
-
-#define DW_FORM_GNU_ref_alt    0x1f20
-#define DW_FORM_GNU_strp_alt   0x1f21
-
-#define DW_LNS_extended_op 0
+#define DW_FORM_GNU_ref_alt 0x1f20
+#define DW_FORM_GNU_str_index 0x1f02
+#define DW_FORM_GNU_strp_alt 0x1f21
+#define DW_FORM_indirect 0x16
+#define DW_FORM_ref1 0x11
+#define DW_FORM_ref2 0x12
+#define DW_FORM_ref4 0x13
+#define DW_FORM_ref8 0x14
+#define DW_FORM_ref_addr 0x10
+#define DW_FORM_ref_sig8 0x20
+#define DW_FORM_ref_udata 0x15
+#define DW_FORM_sdata 0x0d
+#define DW_FORM_sec_offset 0x17
+#define DW_FORM_string 0x08
+#define DW_FORM_strp 0x0e
+#define DW_FORM_strp_sup 0x1d
+#define DW_FORM_udata 0x0f
+#define DW_LNE_define_file 0x03
+#define DW_LNE_define_file_MD5 0x05
+#define DW_LNE_end_sequence 0x01
+#define DW_LNE_set_address 0x02
+#define DW_LNE_set_discriminator 0x04
+#define DW_LNS_advance_line 0x03
+#define DW_LNS_advance_pc 0x02
+#define DW_LNS_const_add_pc 0x08
+#define DW_LNS_copy 0x01
+#define DW_LNS_extended_op 0x00
+#define DW_LNS_fixed_advance_pc 0x09
+#define DW_LNS_negate_stmt 0x06
+#define DW_LNS_set_basic_block 0x07
+#define DW_LNS_set_column 0x05
+#define DW_LNS_set_epilogue_begin 0x0b
+#define DW_LNS_set_file 0x04
+#define DW_LNS_set_isa 0x0c
+#define DW_LNS_set_prologue_end 0x0a
+#define DW_TAG_compile_unit 0x11
+#define DW_TAG_entry_point 0x03
+#define DW_TAG_inlined_subroutine 0x1d
+#define DW_TAG_subprogram 0x2e
 
 #endif
-
diff --git a/application-manager.pro b/application-manager.pro
index d77acf8a..028e2037 100644
--- a/application-manager.pro
+++ b/application-manager.pro
@@ -5,7 +5,6 @@ qtCompileTest(libarchive)
 qtCompileTest(libyaml)
 qtCompileTest(libdbus)
 qtCompileTest(libcrypto)
-qtCompileTest(libdwarf)
 
 force-single-process:force-multi-process:error("You cannot both specify force-single-process and force-multi-process")
 force-multi-process:!headless:!qtHaveModule(compositor):!qtHaveModule(waylandcompositor):error("You forced multi-process mode, but the QtCompositor module is not available")
@@ -27,11 +26,11 @@ load(am-config)
 !config_libyaml:SUBDIRS += 3rdparty/libyaml/libyaml.pro
 
 enable-libbacktrace|CONFIG(debug, debug|release)  {
-  config_libdwarf {
-    check_libbacktrace = "yes"
-    SUBDIRS += 3rdparty/libbacktrace/libbacktrace.pro
-  } else:check_libbacktrace = "no (libdwarf headers not found)"
-} else:check_libbacktrace = "no"
+  check_libbacktrace = "yes"
+  SUBDIRS += 3rdparty/libbacktrace/libbacktrace.pro
+} else {
+  check_libbacktrace = "no"
+}
 
 if(linux|force-libcrypto):check_crypto = "libcrypto / OpenSSL"
 else:win32:check_crypto = "WinCrypt"
diff --git a/config.tests/libdwarf/libdwarf.pro b/config.tests/libdwarf/libdwarf.pro
deleted file mode 100644
index c404c538..00000000
--- a/config.tests/libdwarf/libdwarf.pro
+++ /dev/null
@@ -1,5 +0,0 @@
-TARGET = libdwarf
-CONFIG -= qt
-CONFIG += console
-
-SOURCES += main.cpp
diff --git a/config.tests/libdwarf/main.cpp b/config.tests/libdwarf/main.cpp
deleted file mode 100644
index d1bd6617..00000000
--- a/config.tests/libdwarf/main.cpp
+++ /dev/null
@@ -1,47 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 Pelagicore AG
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the Pelagicore Application Manager.
-**
-** $QT_BEGIN_LICENSE:LGPL-QTAS$
-** Commercial License Usage
-** Licensees holding valid commercial Qt Automotive Suite licenses may use
-** this file in accordance with the commercial license agreement provided
-** with the Software or, alternatively, in accordance with the terms
-** contained in a written agreement between you and The Qt Company.  For
-** licensing terms and conditions see https://www.qt.io/terms-conditions.
-** For further information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
-**
-** $QT_END_LICENSE$
-**
-** SPDX-License-Identifier: LGPL-3.0
-**
-****************************************************************************/
-
-#include <libdwarf/dwarf.h>
-
-int main()
-{
-    return 0;
-}
diff --git a/doc/installation.qdoc b/doc/installation.qdoc
index 8bd00266..69e8ecbc 100644
--- a/doc/installation.qdoc
+++ b/doc/installation.qdoc
@@ -41,7 +41,6 @@ components:
     \li \b openssl 1.0 or higher \e{- Linux only}. At compile time only the headers need to be
            available. The needed libraries will be dynamically loaded at runtime.
     \li \b libarchive 3.0 or higher \e{- only if you need the installer functionality}.
-    \li \b libdwarf \e{- Linux only}. This is a compile-time only dependency for libbacktrace.
 \endlist
 
 On a Debian based systems, this command should install all the required packages:
@@ -107,7 +106,7 @@ There are various options that can be given to \c qmake to tailor the build to y
 \row
   \li \c{-config enable-libbacktrace}
   \li Enables building and linking against \c libbacktrace in the 3rdparty folder. This will give
-      you readable backtraces on crash. You need the \c libdwarf header files during compilation.
+      you readable backtraces on crash, but will also increase the binary size slightly.
 \endtable
 
 \section2 The hardware-id
diff --git a/qmake-features/am-config.prf b/qmake-features/am-config.prf
index 61817bbf..53ce18c7 100644
--- a/qmake-features/am-config.prf
+++ b/qmake-features/am-config.prf
@@ -11,7 +11,7 @@ win32-msvc*:QMAKE_CXXFLAGS += /FS /wd4290 /DNOMINMAX /D_CRT_SECURE_NO_WARNINGS
 disable-installer:DEFINES *= AM_DISABLE_INSTALLER
 systemd-workaround:DEFINES *= AM_SYSTEMD_WORKAROUND
 headless:DEFINES *= AM_HEADLESS
-if(enable-libbacktrace|CONFIG(debug, debug|release)):config_libdwarf:DEFINES *= AM_USE_LIBBACKTRACE
+if(enable-libbacktrace|CONFIG(debug, debug|release)):DEFINES *= AM_USE_LIBBACKTRACE
 
 !force-single-process {
     linux:if(qtHaveModule(compositor)|qtHaveModule(waylandcompositor)|headless):config_libdbus:CONFIG *= auto-multi-process