[clang] [test][clang][driver] Fix test that assumes libomp default (PR #119319)

[Jordan Rupprecht via cfe-commits]

https://github.com/rupprecht created https://github.com/llvm/llvm-project/pull/119319

755519f7f661375be05750001ff11e106e6b7f87 added a test that uses `-fopenmp`. The default configuration of CLANG_DEFAULT_OPENMP_RUNTIME is libomp, which causes `-fopenmp` to act as `-fopenmp=libomp`. In turn, this passes `-fopenmp` to downstream compilations. However, for other values, e.g. `libgomp`, Clang does not know how to generate useful openmp code, so it avoids passing the `-fopenmp` along. Fix the test to explicitly pass `-fopenmp=libomp` to pass regardless of the configured CLANG_DEFAULT_OPENMP_RUNTIME value.

>From 3a5e032b5e7b077e73d903936d1248151f5695a0 Mon Sep 17 00:00:00 2001
From: Jordan Rupprecht <rupprecht at google.com>
Date: Mon, 9 Dec 2024 19:43:35 -0800
Subject: [PATCH] [test][clang][driver] Fix test that assumes libomp default

The default configuration of CLANG_DEFAULT_OPENMP_RUNTIME is libomp, which causes `-fopenmp` to act as `-fopenmp=libomp`. In turn, this passes `-fopenmp` to downstream compilations. However, for other values, e.g. `-fopenmp=libgomp`, Clang does not know how to generate useful openmp code, so it avoids passing the `-fopenmp` along. Fix the test to explicitly pass `-fopenmp=libomp` to pass regardless of the configured CLANG_DEFAULT_OPENMP_RUNTIME value.
---
 clang/test/Driver/config-file.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/clang/test/Driver/config-file.c b/clang/test/Driver/config-file.c
index e9a8555bcc8e43..e84d6dfca373a6 100644
--- a/clang/test/Driver/config-file.c
+++ b/clang/test/Driver/config-file.c
@@ -85,9 +85,9 @@
 
 //--- The linker input flags should be moved to the end of input list and appear only when linking.
 // RUN: %clang --target=aarch64-unknown-linux-gnu --config %S/Inputs/config-l.cfg %s -lmylib -Wl,foo.a -### 2>&1 | FileCheck %s -check-prefix CHECK-LINKING
-// RUN: %clang --target=aarch64-unknown-linux-gnu --config %S/Inputs/config-l.cfg -fopenmp %s -lmylib -Wl,foo.a -### 2>&1 | FileCheck %s -check-prefix CHECK-LINKING-LIBOMP-GOES-AFTER
+// RUN: %clang --target=aarch64-unknown-linux-gnu --config %S/Inputs/config-l.cfg -fopenmp=libomp %s -lmylib -Wl,foo.a -### 2>&1 | FileCheck %s -check-prefix CHECK-LINKING-LIBOMP-GOES-AFTER
 // RUN: %clang --target=aarch64-unknown-linux-gnu --config %S/Inputs/config-l.cfg -S %s -### 2>&1 | FileCheck %s -check-prefix CHECK-NOLINKING
-// RUN: %clang --target=aarch64-unknown-linux-gnu --config %S/Inputs/config-l.cfg -fopenmp -S %s -### 2>&1 | FileCheck %s -check-prefix CHECK-NOLINKING-OPENMP
+// RUN: %clang --target=aarch64-unknown-linux-gnu --config %S/Inputs/config-l.cfg -fopenmp=libomp -S %s -### 2>&1 | FileCheck %s -check-prefix CHECK-NOLINKING-OPENMP
 // RUN: %clang --target=x86_64-pc-windows-msvc    --config %S/Inputs/config-l.cfg %s -lmylib -Wl,foo.lib -### 2>&1 | FileCheck %s -check-prefix CHECK-LINKING-MSVC
 // RUN: %clang --target=x86_64-pc-windows-msvc    --config %S/Inputs/config-l.cfg -S %s -### 2>&1 | FileCheck %s -check-prefix CHECK-NOLINKING-MSVC
 // CHECK-LINKING: Configuration file: {{.*}}Inputs{{.}}config-l.cfg