[lldb] Add CMake dependency tracking for SBLanguages generation script

[bulbazord]

If you change the generation script and re-run ninja (or whatever drives your build), it currently will not regenerate SBLanguages.h. With dependency tracking, it should re-run when the script changes.

[llvmbot]

@llvm/pr-subscribers-lldb

Author: Alex Langford (bulbazord)

Changes

If you change the generation script and re-run ninja (or whatever drives your build), it currently will not regenerate SBLanguages.h. With dependency tracking, it should re-run when the script changes.

---

Full diff: https://github.com/llvm/llvm-project/pull/91686.diff

1 Files Affected:

• (modified) lldb/source/API/CMakeLists.txt (+4-1)

diff --git a/lldb/source/API/CMakeLists.txt b/lldb/source/API/CMakeLists.txt
index aa31caddfde3a..76b42ecf63f91 100644
--- a/lldb/source/API/CMakeLists.txt
+++ b/lldb/source/API/CMakeLists.txt
@@ -23,14 +23,17 @@ endif()
 # Generate SBLanguages.h from Dwarf.def.
 set(sb_languages_file
   ${CMAKE_CURRENT_BINARY_DIR}/../../include/lldb/API/SBLanguages.h)
+set(sb_languages_generator
+  ${LLDB_SOURCE_DIR}/scripts/generate-sbapi-dwarf-enum.py)
 add_custom_command(
   COMMENT "Generating SBLanguages.h from Dwarf.def"
   COMMAND "${Python3_EXECUTABLE}"
-      ${LLDB_SOURCE_DIR}/scripts/generate-sbapi-dwarf-enum.py
+      ${sb_languages_generator}
       ${LLVM_MAIN_INCLUDE_DIR}/llvm/BinaryFormat/Dwarf.def
       -o ${sb_languages_file}
   OUTPUT ${sb_languages_file}
   DEPENDS ${LLVM_MAIN_INCLUDE_DIR}/llvm/BinaryFormat/Dwarf.def
+          ${sb_languages_generator}
   WORKING_DIRECTORY ${LLVM_LIBRARY_OUTPUT_INTDIR}
 )
 add_custom_target(lldb-sbapi-dwarf-enums