================
@@ -3514,6 +3520,31 @@ void CodeGenModule::AddDependentLib(StringRef Lib) {
LinkerOptionsMetadata.push_back(llvm::MDNode::get(C, MDOpts));
}
+/// Process copyright pragma and create LLVM metadata.
+/// #pragma comment(copyright, "string") embed copyright
+/// information into the object file's loader section.
+///
+/// Example: #pragma comment(copyright, "Copyright IBM Corp. 2024")
+///
+/// This should only be called once per translation unit.
+void CodeGenModule::ProcessPragmaComment(PragmaMSCommentKind Kind,
+ StringRef Comment) {
+ // Ensure we are only processing Copyright Pragmas
+ assert(Kind == PCK_Copyright &&
+ "Unexpected pragma comment kind, ProcessPragmaComment should only be "
+ "called for PCK_Copyright");
+
+ // Only one copyright pragma allowed per translation unit
+ if (LoadTimeComment) {
----------------
tonykuttai wrote:
The current behaviour is consistent with the Legacy XLC. XL also emitted a
warning and continued with the compilation as shown below.
Example `tt.c`
```
#pragma comment(copyright,"My copyright")
#pragma comment(copyright,"My copyright 2")
int main() { return 0; }
```
```
$ $xlc_latest -c tt.c -o tt.o
"tt.c", line 6.1: 1506-264 (W) pragma comment(copyright) directive can be
specified only once per source file.
[~/llvm/issues/pragmacomment/xlc] $ strings -a tt.o
.text
.data
@.bss
main
My copyright
.file
tt.c
.text
.data
.bss
.main
_$STATIC
_$STATIC
main
main
BMon Feb 9 01:37:11 2026
IBM XL C for AIX, Version 16.1.0.21
[~/llvm/issues/pragmacomment/xlc] $
```
Bevaiour of OpenXL with our current changes
```
[~/llvm/issues/pragmacomment/xlc] $ $LLVM_BUILD/bin/clang -c tt.c -o tt_openxl.o
tt.c:6:17: warning: '#pragma comment copyright' can be specified only once per
translation unit - ignored [-Wignored-pragmas]
6 | #pragma comment(copyright,"My copyright 2")
| ^
1 warning generated.
[~/llvm/issues/pragmacomment/xlc] $ strings -a tt_openxl.o
.text
.data
main
My copyright
.file
tt.c
.main
main
E__loadtime_comment
LLVM version 23.0.0git
__loadtime_comment_str
[~/llvm/issues/pragmacomment/xlc] $
```
https://github.com/llvm/llvm-project/pull/178184
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