https://github.com/srividya-sundaram updated https://github.com/llvm/llvm-project/pull/211949
>From db0be28f94cf8cee2a35e5eb8da4442ca703c465 Mon Sep 17 00:00:00 2001 From: srividya sundaram <[email protected]> Date: Fri, 24 Jul 2026 15:30:07 -0700 Subject: [PATCH 1/2] [clang][doc][SYCL] Add SYCL driver and device library release notes to ReleaseNotes.md Ports the SYCL driver entries from PR #200449 (which targeted the now-removed ReleaseNotes.rst) to ReleaseNotes.md, and adds an entry for compile-time device library linking via -mlink-builtin-bitcode (#196656). --- clang/docs/ReleaseNotes.md | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/clang/docs/ReleaseNotes.md b/clang/docs/ReleaseNotes.md index 83a2b10d96046..236d6f9db0527 100644 --- a/clang/docs/ReleaseNotes.md +++ b/clang/docs/ReleaseNotes.md @@ -493,6 +493,32 @@ features cannot lower the translation-unit ABI level; #### Improvements +- SYCL compilations now default to `-std=c++17` when no explicit language + standard is specified. Standards below C++17 are rejected with a diagnostic. + +- Clang now assumes the default target for SYCL device compilation is 64-bit + SPIR-V and diagnoses if a non-supporting target is specified on the command + line. (#GH167358) + +- The SYCL runtime shared library has been renamed from `libsycl.so` to + `libLLVMSYCL.so` to align with LLVM naming conventions. + +- SYCL header include paths are now added automatically for both host and + device compilations. + +- SYCL runtime library linking is now supported on Windows. When `-fsycl` is + specified, Clang automatically adds `/MD` if no explicit CRT flag is present, + links the appropriate debug (`LLVMSYCLd.lib`) or release (`LLVMSYCL.lib`) + library, and rejects static CRT flags (`/MT`, `/MTd`) with a diagnostic. Use + `-nolibsycl` to suppress automatic library linking. + +- Fixed `-nolibsycl` being silently ignored on Linux: the SYCL runtime library + was unconditionally added to the link line even when the flag was passed. + +- SYCL device compilations targeting SPIR-V now automatically link + `libclang_rt.builtins.bc` at compile time via `-mlink-builtin-bitcode`. + Pass `--no-offloadlib` to opt out. + ## Additional Information A wide variety of additional information is available on the [Clang web >From 5d7225e655b2ce23c85997d14740c2f7f3de79ee Mon Sep 17 00:00:00 2001 From: srividya sundaram <[email protected]> Date: Sun, 26 Jul 2026 20:19:33 -0700 Subject: [PATCH 2/2] Apply review comments. --- clang/docs/ReleaseNotes.md | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/clang/docs/ReleaseNotes.md b/clang/docs/ReleaseNotes.md index 236d6f9db0527..ec11e979084e8 100644 --- a/clang/docs/ReleaseNotes.md +++ b/clang/docs/ReleaseNotes.md @@ -503,8 +503,8 @@ features cannot lower the translation-unit ABI level; - The SYCL runtime shared library has been renamed from `libsycl.so` to `libLLVMSYCL.so` to align with LLVM naming conventions. -- SYCL header include paths are now added automatically for both host and - device compilations. +- In SYCL mode, the compiler driver automatically provides the necessary SYCL + header include paths to both the host and device compilers. - SYCL runtime library linking is now supported on Windows. When `-fsycl` is specified, Clang automatically adds `/MD` if no explicit CRT flag is present, @@ -515,9 +515,8 @@ features cannot lower the translation-unit ABI level; - Fixed `-nolibsycl` being silently ignored on Linux: the SYCL runtime library was unconditionally added to the link line even when the flag was passed. -- SYCL device compilations targeting SPIR-V now automatically link - `libclang_rt.builtins.bc` at compile time via `-mlink-builtin-bitcode`. - Pass `--no-offloadlib` to opt out. +- SYCL device compilations targeting SPIR-V now automatically link compiler + builtin functions at compile time. Pass `--no-offloadlib` to opt out. ## Additional Information _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
