[clang] [Clang][Driver][Test] Created test for unsupported driver options (PR #120900)

[via cfe-commits]

GeorgeKA wrote:

Hi @Maetveis . This is ready for review.

There are a few things that I came across while making the script that I should highlight :

1) clang -cc1 test directory

[test/Driver/lit.local.cfg](https://github.com/llvm/llvm-project/blob/e10d551aa482ee185a80216b2670a2947a8bdeb0/clang/test/Driver/lit.local.cfg#L27) says, '_("%clang_cc1", """*** Do not use 'clang -cc1' in Driver tests. ***""")_', yet I see various tests in that directory that do so, like [linker-wrapper.c](https://github.com/llvm/llvm-project/blob/e10d551aa482ee185a80216b2670a2947a8bdeb0/clang/test/Driver/linker-wrapper.c#L10). If there's no opposition, I'll leave the cc1 tests in the main Lit test file, Driver/unsupported_in_drivermode.c.

2) flang vs flang -fc1

As per [clang/test/Driver/flang/flang.f90](https://github.com/llvm/llvm-project/blob/e10d551aa482ee185a80216b2670a2947a8bdeb0/clang/test/Driver/flang/flang.f90#L1), "flang -fc1 is invoked when in --driver-mode=flang", so I disabled the plain flang tests since there's no distinction.

3) Testing on Windows

I disabled the tests on Windows given the following recursion error that occurs on Windows regression machines. (It has some odd formatting. Pasting in a text editor makes viewing it easier.)
```
	^[_bk;t=1737572755765^GPASS: Clang :: Driver/fsanitize-memory-param-retval.c (11017 of 21306)^M                                                                                                             ^[_bk;t=1737572756104^G******************** TEST 'Clang :: Driver/flang/unsupported_in_flang.f90' FAILED ********************^M                                                                             ^[_bk;t=1737572756104^G******************** TEST 'Clang :: Driver/flang/unsupported_in_flang.f90' FAILED ********************^M                                                                             ^[_bk;t=1737572756104^GTraceback (most recent call last):^M                                                                                                                                                 ^[_bk;t=1737572756104^GTraceback (most recent call last):^M                                                                                                                                                 ^[_bk;t=1737572756104^GTraceback (most recent call last):^M                                                                                                                                                 ^[_bk;t=1737572756104^G  File "C:\ws\src\llvm\utils\lit\lit\formats\shtest.py", line 29, in execute^M
	^[_bk;t=1737572756104^G    return lit.TestRunner.executeShTest(^M
	^[_bk;t=1737572756104^G  File "C:\ws\src\llvm\utils\lit\lit\TestRunner.py", line 2326, in executeShTest^M                                                                                                   ^[_bk;t=1737572756104^G  File "C:\ws\src\llvm\utils\lit\lit\TestRunner.py", line 2326, in executeShTest^M                                                                                                   ^[_bk;t=1737572756104^G  File "C:\ws\src\llvm\utils\lit\lit\TestRunner.py", line 2326, in executeShTest^M                                                                                                   ^[_bk;t=1737572756104^G  File "C:\ws\src\llvm\utils\lit\lit\TestRunner.py", line 2326, in executeShTest^M                                                                                                   ^[_bk;t=1737572756104^G  File "C:\ws\src\llvm\utils\lit\lit\TestRunner.py", line 2326, in executeShTest^M                                                                                                   ^[_bk;t=1737572756104^G    res = executeScriptInternal(^M
	^[_bk;t=1737572756104^G  File "C:\ws\src\llvm\utils\lit\lit\TestRunner.py", line 1110, in executeScriptInternal^M
	^[_bk;t=1737572756104^G    exitCode, timeoutInfo = executeShCmd(^M                                                                                                                                          ^[_bk;t=1737572756104^G    exitCode, timeoutInfo = executeShCmd(^M                                                                                                                                          ^[_bk;t=1737572756104^G    exitCode, timeoutInfo = executeShCmd(^M                                                                                                                                          ^[_bk;t=1737572756104^G    exitCode, timeoutInfo = executeShCmd(^M                                                                                                                                          ^[_bk;t=1737572756104^G    exitCode, timeoutInfo = executeShCmd(^M                                                                                                                                          ^[_bk;t=1737572756104^G    exitCode, timeoutInfo = executeShCmd(^M                                                                                                                                          ^[_bk;t=1737572756104^G    exitCode, timeoutInfo = executeShCmd(^M                                                                                                                                          ^[_bk;t=1737572756104^G    exitCode, timeoutInfo = executeShCmd(^M                                                                                                                                          ^[_bk;t=1737572756104^G    res = _executeShCmd(cmd.lhs, shenv, results, timeoutHelper)^M                                                                                                                    ^[_bk;t=1737572756104^G    res = _executeShCmd(cmd.lhs, shenv, results, timeoutHelper)^M                                                                                                                    ^[_bk;t=1737572756104^G    res = _executeShCmd(cmd.lhs, shenv, results, timeoutHelper)^M                                                                                                                    ^[_bk;t=1737572756104^G    if timeoutHelper.timeoutReached():^M                                                                                                                                             ^[_bk;t=1737572756104^G    if timeoutHelper.timeoutReached():^M
```

https://github.com/llvm/llvm-project/pull/120900