[Driver] Add m_Group to -m[no-]strict-align

so that `Args.ClaimAllArgs(options::OPT_CompileOnly_Group);` in
Driver::handleArguments will claim the options even if only linking is
performed.

Fix #87945

Author: MaskRay

clang/include/clang/Driver/Options.td

@@ -4747,9 +4747,9 @@ def munaligned_symbols : Flag<["-"], "munaligned-symbols">, Group<m_Group>,
   HelpText<"Expect external char-aligned symbols to be without ABI alignment (SystemZ only)">;
 def mno_unaligned_symbols : Flag<["-"], "mno-unaligned-symbols">, Group<m_Group>,
   HelpText<"Expect external char-aligned symbols to be without ABI alignment (SystemZ only)">;
-def mstrict_align : Flag<["-"], "mstrict-align">,
+def mstrict_align : Flag<["-"], "mstrict-align">, Group<m_Group>,
   HelpText<"Force all memory accesses to be aligned (AArch64/LoongArch/RISC-V only)">;
-def mno_strict_align : Flag<["-"], "mno-strict-align">,
+def mno_strict_align : Flag<["-"], "mno-strict-align">, Group<m_Group>,
   HelpText<"Allow memory accesses to be unaligned (AArch64/LoongArch/RISC-V only)">;
 def mno_thumb : Flag<["-"], "mno-thumb">, Group<m_arm_Features_Group>;
 def mrestrict_it: Flag<["-"], "mrestrict-it">, Group<m_arm_Features_Group>,

clang/test/Driver/riscv-features.c

@@ -37,6 +37,8 @@
 
 // RUN: %clang --target=riscv32-unknown-elf -### %s -mno-strict-align 2>&1 | FileCheck %s -check-prefix=FAST-UNALIGNED-ACCESS
 // RUN: %clang --target=riscv32-unknown-elf -### %s -mstrict-align 2>&1 | FileCheck %s -check-prefix=NO-FAST-UNALIGNED-ACCESS
+// RUN: touch %t.o
+// RUN: %clang --target=riscv32-unknown-elf -### %t.o -mno-strict-align -mstrict-align
 
 // FAST-UNALIGNED-ACCESS: "-target-feature" "+unaligned-scalar-mem" "-target-feature" "+unaligned-vector-mem"
 // NO-FAST-UNALIGNED-ACCESS: "-target-feature" "-unaligned-scalar-mem" "-target-feature" "-unaligned-vector-mem"