Merge bitcoin/bitcoin#34413: doc: Remove outdated -fdebug-prefix-map section in dev notes

fa2e1b85dd build: Remove outdated comment about -ffile-prefix-map (MarcoFalke)
fa06cd4ba7 doc: Remove outdated -fdebug-prefix-map section in dev notes (MarcoFalke)

Pull request description:

  This removes some docs. See the commit messages for an explanation.

ACKs for top commit:
  l0rinc:
    ACK fa2e1b85dd
  sedited:
    ACK fa2e1b85dd

Tree-SHA512: 6be33bdf9365be5fb75d39a48fd1295b193649775a00e8344123dc0f588da22f7efe80b1490dde2c74aea3d7fec6a3fa75785791296f3fb248ddf45e40b95eb7

CMakeLists.txt

@@ -483,11 +483,6 @@ configure_file(contrib/filter-lcov.py filter-lcov.py USE_SOURCE_PERMISSIONS COPY
 # Don't allow extended (non-ASCII) symbols in identifiers. This is easier for code review.
 try_append_cxx_flags("-fno-extended-identifiers" TARGET core_interface SKIP_LINK)
 
-# Avoiding the `-ffile-prefix-map` compiler option because it implies
-# `-fcoverage-prefix-map` on Clang or `-fprofile-prefix-map` on GCC,
-# which can cause issues with coverage builds, particularly when using
-# Clang in the OSS-Fuzz environment due to its use of other options
-# and a third party script, or with GCC.
 # Set `-fmacro-prefix-map`, so that source file names are expanded without the
 # src prefix.
 try_append_cxx_flags("-fmacro-prefix-map=A=B" TARGET core_interface SKIP_LINK

doc/developer-notes.md

@@ -305,37 +305,6 @@ If you need to build exclusively for debugging, set the `-DCMAKE_BUILD_TYPE`
 to `Debug` (i.e. `-DCMAKE_BUILD_TYPE=Debug`). You can always check the cmake
 build options of an existing build with `ccmake build`.
 
-### 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 (e.g. it won't stop at breakpoints).
-
-There are a few possible fixes:
-
-1. Configure source file mapping.
-
-For `gdb` create or append to [`.gdbinit` file](https://sourceware.org/gdb/current/onlinedocs/gdb#gdbinit-man):
-```
-set substitute-path ./src /path/to/project/root/src
-```
-
-For `lldb` create or append to [`.lldbinit` file](https://lldb.llvm.org/man/lldb.html#configuration-files):
-```
-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.
-
-4. If your IDE has an option for this, change your breakpoints to use the file name only.
-
 ### debug.log
 
 If the code is behaving strangely, take a look in the `debug.log` file in the data directory;