[Lldb-commits] [lldb] [lldb][Windows] Make RM_RF a no-op on an empty argument and swallow errors (PR #203040)

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<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-lldb

Author: Charles Zablit (charles-zablit)

<details>
<summary>Changes</summary>

This patch makes the Windows `RM_RF` a no-op on an empty argument and swallow errors, matching Unix `rm -rf`. This fixes issues in swiftlang on fresh builds.

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Full diff: https://github.com/llvm/llvm-project/pull/203040.diff


1 Files Affected:

- (modified) lldb/packages/Python/lldbsuite/test/make/Makefile.rules (+1-1) 


``````````diff
diff --git a/lldb/packages/Python/lldbsuite/test/make/Makefile.rules b/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
index 44aa91ef7b6fc..f4318299c1164 100644
--- a/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
+++ b/lldb/packages/Python/lldbsuite/test/make/Makefile.rules
@@ -44,7 +44,7 @@ ifeq "$(OS)" "Windows_NT"
 	CP_R = xcopy $(subst /,\,$(1)) $(subst /,\,$(2)) /s /e /y
 	RM = del $(subst /,\,$(1)) > nul 2>&1 || (exit 0)
 	RM_F = del /f /q $(subst /,\,$(1))
-	RM_RF = rd /s /q $(subst /,\,$(1))
+	RM_RF = $(if $(strip $(1)),rd /s /q $(subst /,\,$(1)) > nul 2>&1 || (exit 0))
 	LN_SF = mklink /D "$(subst /,\,$(2))" "$(subst /,\,$(1))"
 	ECHO = echo $(1);
 	ECHO_TO_FILE = printf "%s\n" $(1) > "$(subst /,\,$(2))"

``````````

</details>


https://github.com/llvm/llvm-project/pull/203040