From 1ef92d645da2eafa2e39b09e7ce9c6f104075713 Mon Sep 17 00:00:00 2001
From: Alex Turbov <i.zaufi@gmail.com>
Date: Sun, 12 Apr 2026 06:11:41 +0400
Subject: [PATCH] CPack/DEB: fix `md5sums` paths in dbgsym packages

The Debian `lintian` tool reported the dbgsym package issue as
`md5sums-lists-nonexistent-file`.

The DEB generator writes `md5sums` entries by stripping a top-level prefix
from each packaged file path. That used `CPACK_TEMPORARY_DIRECTORY`, which
works for regular debs but not for dbgsym packages.

Dbgsym package files are collected from `GEN_DBGSYMDIR` and passed to
`DebGenerator` with `WorkDir` rooted there. Because the `md5sums` writer
stripped `TemporaryDir` instead, the prefix did not match and absolute
staging paths leaked into `md5sums`.

Strip `WorkDir` instead. That is the actual root of `PackageFiles` for both
regular deb and dbgsym package generation, so `md5sums` entries stay
relative in both cases.
---
 Source/CPack/cmCPackDebGenerator.cxx          |  2 +-
 .../CPack/tests/DEBUGINFO/VerifyResult.cmake  | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 Tests/RunCMake/CPack/tests/DEBUGINFO/VerifyResult.cmake

diff --git a/Source/CPack/cmCPackDebGenerator.cxx b/Source/CPack/cmCPackDebGenerator.cxx
index d94e52151d..63e58a4ed9 100644
--- a/Source/CPack/cmCPackDebGenerator.cxx
+++ b/Source/CPack/cmCPackDebGenerator.cxx
@@ -302,7 +302,7 @@ std::string DebGenerator::generateMD5File() const
   cmGeneratedFileStream out;
   out.Open(md5filename, false, true);
 
-  std::string topLevelWithTrailingSlash = cmStrCat(this->TemporaryDir, '/');
+  std::string topLevelWithTrailingSlash = cmStrCat(this->WorkDir, '/');
   for (std::string const& file : this->PackageFiles) {
     // hash only regular files
     if (cmSystemTools::FileIsDirectory(file) ||
diff --git a/Tests/RunCMake/CPack/tests/DEBUGINFO/VerifyResult.cmake b/Tests/RunCMake/CPack/tests/DEBUGINFO/VerifyResult.cmake
new file mode 100644
index 0000000000..5ef05a30e6
--- /dev/null
+++ b/Tests/RunCMake/CPack/tests/DEBUGINFO/VerifyResult.cmake
@@ -0,0 +1,19 @@
+if(NOT GENERATOR_TYPE STREQUAL "DEB")
+  return()
+endif()
+
+set(whitespaces_ "[\t\n\r ]*")
+set(hashsyms_ "[a-f0-9]+")
+
+set(dbgsym_md5sums_md5sums
+  "^(${hashsyms_}  usr/lib/debug/\\.build-id/[^/\r\n]+/[^/\r\n]+\\.debug${whitespaces_})+$")
+set(dbgsym_md5sums_md5sums_permissions "-rw-r--r--")
+
+if(PACKAGING_TYPE STREQUAL "COMPONENT")
+  verifyDebControl("${FOUND_FILE_4}" "dbgsym_md5sums" "md5sums")
+  verifyDebControl("${FOUND_FILE_5}" "dbgsym_md5sums" "md5sums")
+
+elseif(PACKAGING_TYPE STREQUAL "MONOLITHIC")
+  verifyDebControl("${FOUND_FILE_2}" "dbgsym_md5sums" "md5sums")
+
+endif()