From 35c4c210b1663c656cedc07739adadb096acf0c4 Mon Sep 17 00:00:00 2001
From: Bartek Kryza <bkryza@gmail.com>
Date: Sun, 19 Feb 2023 00:37:15 +0100
Subject: [PATCH] Enabled backward-cpp for debug build on Linux

---
 .github/workflows/build.yml |  2 +-
 CMakeLists.txt              | 15 +++++++++++++++
 README.md                   |  1 +
 src/CMakeLists.txt          |  3 +++
 src/main.cc                 |  6 ++++--
 5 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 562cd3af..59cddc83 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -29,7 +29,7 @@ jobs:
     - name: Update package database
       run: sudo apt -y update
     - name: Install deps
-      run: sudo apt -y install git make gcc-10 g++-10 ccache cmake libyaml-cpp-dev llvm-12 clang-12 libclang-12-dev libclang-cpp12-dev clang-format-12 lcov zlib1g-dev
+      run: sudo apt -y install git make pkg-config gcc-10 g++-10 ccache cmake libyaml-cpp-dev llvm-12 clang-12 libclang-12-dev libclang-cpp12-dev clang-format-12 lcov zlib1g-dev libunwind-dev libdw-dev
     - name: Select g++ version
       run: |
         sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 10
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 15bf1602..5cd3aa10 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,6 +14,10 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 set(CMAKE_VERBOSE_MAKEFILE OFF)
 set(CMAKE_FIND_DEBUG_MODE OFF)
 
+if(UNIX AND NOT APPLE)
+    set(LINUX TRUE)
+endif()
+
 #
 # C++ setup
 #
@@ -155,6 +159,17 @@ endif()
 
 link_directories(${LLVM_LIBRARY_DIR} ${YAML_CPP_LIBRARY_DIR})
 
+#
+# Setup libdw and libunwind
+#
+if(LINUX AND (CMAKE_BUILD_TYPE MATCHES Debug))
+    find_package(PkgConfig REQUIRED)
+    pkg_check_modules(DW REQUIRED IMPORTED_TARGET libdw)
+    pkg_check_modules(UNWIND REQUIRED IMPORTED_TARGET libunwind)
+    set(BACKWARD_CPP_LIBRARIES PkgConfig::DW PkgConfig::UNWIND)
+    set(ENABLE_BACKWARD_CPP -DENABLE_BACKWARD_CPP)
+endif()
+
 #
 # Setup thirdparty sources
 #
diff --git a/README.md b/README.md
index ffcd882e..c55653d8 100644
--- a/README.md
+++ b/README.md
@@ -422,6 +422,7 @@ This project relies on the following great tools:
 * [glob](https://github.com/p-ranav/glob) - Unix style path expansion for C++
 * [CLI11](https://github.com/CLIUtils/CLI11) - command line parser for C++
 * [inja](https://github.com/pantor/inja) - a template engine for modern C++
+* [backward-cpp](https://github.com/bombela/backward-cpp) - stack trace pretty printer for C++
 
 ## Contributing
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 15d9b597..4e0d83af 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -43,10 +43,13 @@ target_compile_options(clang-uml PRIVATE
         -Werror -Wall -Wextra -Wno-unused-parameter -Wno-unused-private-field
         -Wno-deprecated-declarations>
         $<$<CXX_COMPILER_ID:MSVC>:/MP /W1 /bigobj /wd4291 /wd4624 /wd4244>)
+target_compile_definitions(clang-uml PRIVATE
+        ${ENABLE_BACKWARD_CPP})
 target_link_libraries(clang-uml
         ${YAML_CPP_LIBRARIES}
         ${LIBTOOLING_LIBS}
         ${MSVC_LIBRARIES}
+        ${BACKWARD_CPP_LIBRARIES}
         clang-umllib
         Threads::Threads)
 
diff --git a/src/main.cc b/src/main.cc
index a8e130be..58dc0d2c 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -24,7 +24,9 @@
 #include "util/util.h"
 #include "version.h"
 
-#ifndef NDEBUG
+#ifdef ENABLE_BACKWARD_CPP
+#define BACKWARD_HAS_DW 1
+#define BACKWARD_HAS_LIBUNWIND 1
 #include <backward-cpp/backward.hpp>
 #endif
 
@@ -40,7 +42,7 @@
 #include <iostream>
 #include <util/thread_pool_executor.h>
 
-#ifndef NDEBUG
+#ifdef ENABLE_BACKWARD_CPP
 namespace backward {
 backward::SignalHandling sh; // NOLINT
 } // namespace backward