bootstrap/llvm18: replace symlink with files.

Note: default_llvm="no"

Effectively reverts 1c7549b7bb4dcf1142d6c19876841ccc93fcafd5
since 'abuild' uses readlink to derive repository information.

The user/llvm18 package is free to be updated independently.

1 files changed, 26 insertions, 0 deletions

diff --git a/bootstrap/llvm18/m68k-endianness.patch b/bootstrap/llvm18/m68k-endianness.patch
new file mode 100644
index 000000000..49e96a995
--- /dev/null
+++ b/bootstrap/llvm18/m68k-endianness.patch
@@ -0,0 +1,26 @@
+Upstream: https://github.com/llvm/llvm-project/issues/94726
+
+diff --git a/lib/Target/M68k/MCTargetDesc/M68kBaseInfo.h b/lib/Target/M68k/MCTargetDesc/M68kBaseInfo.h
+index 1376b06bef6f..62ea03cc9760 100644
+--- a/lib/Target/M68k/MCTargetDesc/M68kBaseInfo.h
++++ b/lib/Target/M68k/MCTargetDesc/M68kBaseInfo.h
+@@ -85,9 +85,16 @@ template <typename value_t> value_t swapWord(value_t Val) {
+   Val = support::endian::byte_swap(Val, llvm::endianness::big);
+   value_t NewVal = 0;
+   for (unsigned i = 0U; i != NumWords; ++i) {
+-    uint16_t Part = (Val >> (i * 16)) & 0xFFFF;
+-    Part = support::endian::byte_swap(Part, llvm::endianness::big);
+-    NewVal |= (Part << (i * 16));
++    if (llvm::endianness::native == llvm::endianness::big) {
++      uint16_t Lo = (Val >> (i * 16)) & 0xFFFF;
++      NewVal |= (Lo << (++i * 16));
++      uint16_t Hi = (Val >> (++i * 16)) & 0xFFFF;
++      NewVal |= (Hi << ((i - 1) * 16));
++    } else {
++      uint16_t Part = (Val >> (i * 16)) & 0xFFFF;
++      Part = support::endian::byte_swap(Part, llvm::endianness::big);
++      NewVal |= (Part << (i * 16));
++    }
+   }
+   return NewVal;
+ }