Set debug flags on non-Win32 according to CONFIG; add -g as well.

CMakeLists.txt

@@ -22,6 +22,15 @@ else()
         endif()
 endif()
 
+if(NOT WIN32)
+    # Add DEBUG flags to debug builds.
+    # Also add -g to RELWITHDEBINFO on non-win32
+    set(_CC_DEBUG_FLAGS $<$<CONFIG:DEBUG>:-DwxDEBUG_LEVEL=1>
+                        $<$<CONFIG:DEBUG>:-g>
+                        $<$<CONFIG:RELWITHDEBINFO>:-g>
+    )
+endif()
+
 option(SLIC3R_STATIC 			"Compile Slic3r with static libraries (Boost, TBB, glew)" ${SLIC3R_STATIC_INITIAL})
 option(SLIC3R_GUI    			"Compile Slic3r with GUI components (OpenGL, wxWidgets)" 1)
 option(SLIC3R_FHS               "Assume Slic3r is to be installed in a FHS directory structure" 0)
@@ -113,11 +122,6 @@ enable_testing ()
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-if(NOT WIN32)
-    # Add DEBUG flags to debug builds.
-    add_compile_options("$<$<CONFIG:DEBUG>:-DDEBUG>")
-endif()
-
 # To be able to link libslic3r with the Perl XS module.
 # Once we get rid of Perl and libslic3r is linked statically, we can get rid of -fPIC
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)

src/CMakeLists.txt

@@ -99,6 +99,7 @@ if (WIN32)
     add_library(Slic3r SHARED PrusaSlicer.cpp PrusaSlicer.hpp)
 else ()
     add_executable(Slic3r PrusaSlicer.cpp PrusaSlicer.hpp)
+    target_compile_options(Slic3r PRIVATE ${_CC_DEBUG_FLAGS})
 endif ()
 
 if (MINGW)

src/libslic3r/CMakeLists.txt

@@ -1,6 +1,11 @@
 project(libslic3r)
 cmake_minimum_required(VERSION 3.13)
 
+if(NOT WIN32)
+    # Add DEBUG flags to debug builds.
+    add_compile_options(${_CC_DEBUG_FLAGS})
+endif()
+
 include(PrecompiledHeader)
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libslic3r_version.h.in ${CMAKE_CURRENT_BINARY_DIR}/libslic3r_version.h @ONLY)