[compiler-rt][test] Add int128 requirement to TestCases/Misc/Linux/static-link.cpp

[leonardchan]

Summary

We hit some undefined symbol errors to 128-bit floating point functions when linking this test.

ld.lld: error: undefined symbol: __multf3
>>> referenced by strtof128_l.o:(round_and_return) in archive /usr/lib/x86_64-linux-gnu/libc.a
>>> referenced by strtof128_l.o:(round_and_return) in archive /usr/lib/x86_64-linux-gnu/libc.a
>>> referenced by strtof128_l.o:(round_and_return) in archive /usr/lib/x86_64-linux-gnu/libc.a
>>> referenced 4 more times
>>> did you mean: __muldf3
>>> defined in: /usr/local/google/home/leonardchan/llvm-monorepo/llvm-build-1-master-fuchsia-toolchain/lib/clang/14.0.0/lib/x86_64-unknown-linux-gnu/libclang_rt.builtins.a

Host libc expects these to be defined, and compiler-rt will only define these for certain platforms (see definition for CRT_LDBL_128BIT). Since we likely can't do anything about the host libc, we can at least restrict the test to check that these functions are supported.

[phosek]

LGTM

[leonardchan]

Updated with a different REQUIRES since it turns out the issue was behind CRT_LDBL_128BIT not being defined instead (because __LDBL_MANT_DIG__ is 64 on x86_64-linux). Will let it sit longer if anyone wants to take a second look and submit at EOD if no other comments.

compiler-rt/test/ubsan/TestCases/Misc/Linux/static-link.cpp

 // REQUIRES: ubsan-standalone
 // REQUIRES: arch=x86_64
+// REQUIRES: librt_has_multf3
 // RUN: %clangxx -fsanitize=bool -static  %s -o %t && UBSAN_OPTIONS=handle_segv=0:handle_sigbus=0:handle_sigfpe=0 %run %t 2>&1 | FileCheck %s
 #include <signal.h>
 #include <stdio.h>
 
 int main() {
   struct sigaction old_action;
   sigaction(SIGINT, nullptr, &old_action);
   // CHECK: Warning: REAL(sigaction_symname) == nullptr.
   printf("PASS\n");
   // CHECK: PASS
 }