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BaseTools/Trim.py: Strip "#pragma once" from inlined ASL content #1840

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makubacki merged 1 commit into from
Jun 30, 2026
+8 −0
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BaseTools/Trim.py: Strip "#pragma once" from inlined ASL content #1840

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8 changes: 8 additions & 0 deletions BaseTools/Source/Python/Trim/Trim.py
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,10 @@
gAslIncludePattern = re.compile(r"^(\s*)[iI]nclude\s*\(\"?([^\"\(\)]+)\"\)", re.MULTILINE)
## Regular expression for matching C style #include "XXX.asl" in asl file
gAslCIncludePattern = re.compile(r'^(\s*)#include\s*[<"]\s*([-\\/\w.]+)\s*([>"])', re.MULTILINE)
# MU_CHANGE [BEGIN] - Handle pragma once in ASL
## Regular expression for matching "#pragma once"
gPragmaOncePattern = re.compile(r"^\s*#\s*pragma\s+once\b", re.IGNORECASE)
# MU_CHANGE [END] - Handle pragma once in ASL
## Patterns used to convert EDK conventions to EDK2 ECP conventions

## Regular expression for finding header file inclusions
Expand Down Expand Up @@ -322,6 +326,10 @@ def DoInclude(Source, Indent='', IncludePathList=[], LocalSearchPath=None, Inclu
if len(Result) == 0:
Result = gAslCIncludePattern.findall(Line)
if len(Result) == 0 or os.path.splitext(Result[0][1])[1].lower() not in [".asl", ".asi"]:
# MU_CHANGE [BEGIN] - Handle pragma once in ASL
if gPragmaOncePattern.match(Line):
continue
# MU_CHANGE [END] - Handle pragma once in ASL
NewFileContent.append("%s%s" % (Indent, Line))
continue
#
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