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lldb-server exec users always /usr/bin/lldb-server. Server is required
for any debugging with lldb which makes it unusable unless default version
package has been installed. Small changes to code and debian/rules allows
a workaround for lldb-server start up.
To use this one needs to add cmake definition during configure. eg
-DDEBIAN_VERSION_SUFFIX=-$(LLVM_VERSION)
Better implementation would be to use /usr/share/llvm-$(VERSION)/bin but
that change seems to require a big change to the path handling code
which could then break something else.
This probably should have upstream bug but I couldn't find any existing report.
Index: llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
===================================================================
--- llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779.orig/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
+++ llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
@@ -27,6 +27,7 @@
#include "llvm/Config/llvm-config.h" // for LLVM_ENABLE_ZLIB
#include "llvm/Support/Error.h"
#include "llvm/Support/ScopedPrinter.h"
+#include "llvm/Config/llvm-config.h"
#include <climits>
#include <cstring>
#include <sys/stat.h>
Index: llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
===================================================================
--- llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779.orig/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ llvm-toolchain-snapshot_21~++20250630094904+57f7e14b5779/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -98,7 +98,7 @@
#elif defined(_WIN32)
#define DEBUGSERVER_BASENAME "lldb-server.exe"
#else
-#define DEBUGSERVER_BASENAME "lldb-server"
+#define DEBUGSERVER_BASENAME "lldb-server-" LLVM_VERSION_STRING
#endif
using namespace lldb;
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