From a8b515c317f0b5560f62c72a8f4eb6560d8f1c75 Mon Sep 17 00:00:00 2001
From: S3RK <1466284+S3RK@users.noreply.github.com>
Date: Tue, 6 Jul 2021 08:57:23 +0200
Subject: [PATCH 1/2] configure: keep relative paths in debug info

Revert to the state prior to e507acbe and allow debugging
from project root dir with `gdb src/bitcoind`.
---
 configure.ac | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 88f91004afd..20ba0f72d74 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1627,8 +1627,8 @@ if test "x$use_ccache" != "xno"; then
   fi
   AC_MSG_RESULT($use_ccache)
   if test "x$use_ccache" = "xyes"; then
-    AX_CHECK_COMPILE_FLAG([-fdebug-prefix-map=A=B],[DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -fdebug-prefix-map=\$(abs_srcdir)=."],,[[$CXXFLAG_WERROR]])
-    AX_CHECK_PREPROC_FLAG([-fmacro-prefix-map=A=B],[DEBUG_CPPFLAGS="$DEBUG_CPPFLAGS -fmacro-prefix-map=\$(abs_srcdir)=."],,[[$CXXFLAG_WERROR]])
+    AX_CHECK_COMPILE_FLAG([-fdebug-prefix-map=A=B],[DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -fdebug-prefix-map=\$(abs_top_srcdir)=."],,[[$CXXFLAG_WERROR]])
+    AX_CHECK_PREPROC_FLAG([-fmacro-prefix-map=A=B],[DEBUG_CPPFLAGS="$DEBUG_CPPFLAGS -fmacro-prefix-map=\$(abs_top_srcdir)=."],,[[$CXXFLAG_WERROR]])
   fi
 fi
 

From 0bc666b053b8f4883c3f5de43959e2bbd91b95c5 Mon Sep 17 00:00:00 2001
From: S3RK <1466284+S3RK@users.noreply.github.com>
Date: Tue, 6 Jul 2021 09:15:07 +0200
Subject: [PATCH 2/2] doc: add info for debugging with relative paths

---
 doc/developer-notes.md | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/doc/developer-notes.md b/doc/developer-notes.md
index c3a63b35238..be832577409 100644
--- a/doc/developer-notes.md
+++ b/doc/developer-notes.md
@@ -12,6 +12,7 @@ Developer Notes
       - [Generating Documentation](#generating-documentation)
     - [Development tips and tricks](#development-tips-and-tricks)
         - [Compiling for debugging](#compiling-for-debugging)
+        - [Show sources in debugging](#show-sources-in-debugging)
         - [Compiling for gprof profiling](#compiling-for-gprof-profiling)
         - [`debug.log`](#debuglog)
         - [Signet, testnet, and regtest modes](#signet-testnet-and-regtest-modes)
@@ -249,6 +250,35 @@ Development tips and tricks
 Run configure with `--enable-debug` to add additional compiler flags that
 produce better debugging builds.
 
+### Show sources in debugging
+
+If you have ccache enabled, absolute paths are stripped from debug information
+with the -fdebug-prefix-map and -fmacro-prefix-map options (if supported by the
+compiler). This might break source file detection in case you move binaries
+after compilation, debug from the directory other than the project root or use
+an IDE that only supports absolute paths for debugging.
+
+There are a few possible fixes:
+
+1. Configure source file mapping.
+
+For `gdb` create or append to `.gdbinit` file:
+```
+set substitute-path ./src /path/to/project/root/src
+```
+
+For `lldb` create or append to `.lldbinit` file:
+```
+settings set target.source-map ./src /path/to/project/root/src
+```
+
+2. Add a symlink to the `./src` directory:
+```
+ln -s /path/to/project/root/src src
+```
+
+3. Use `debugedit` to modify debug information in the binary.
+
 ### Compiling for gprof profiling
 
 Run configure with the `--enable-gprof` option, then make.