[flang-commits] [flang] [llvm] [flang/flang-rt] Add -isysroot flag only to tests really requiring (PR #152914)

[LLVM Continuous Integration via flang-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64-flang-aix` running on `ppc64-flang-aix-test` while building `flang-rt,flang` at step 6 "test-build-unified-tree-check-flang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/201/builds/5894

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-flang) failure: test (failure)
******************** TEST 'Flang :: Integration/iso-fortran-binding.cpp' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
rm -rf /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/tools/flang/test/Integration/Output/iso-fortran-binding.cpp.tmp && mkdir /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/tools/flang/test/Integration/Output/iso-fortran-binding.cpp.tmp # RUN: at line 3
+ rm -rf /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/tools/flang/test/Integration/Output/iso-fortran-binding.cpp.tmp
+ mkdir /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/tools/flang/test/Integration/Output/iso-fortran-binding.cpp.tmp
/home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/bin/clang --driver-mode=g++  -I/home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/./lib/../lib/clang/22/include /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/llvm-project/flang/test/Integration/iso-fortran-binding.cpp -o /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/tools/flang/test/Integration/Output/iso-fortran-binding.cpp.tmp/a.out # RUN: at line 4
+ /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/bin/clang --driver-mode=g++ -I/home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/./lib/../lib/clang/22/include /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/llvm-project/flang/test/Integration/iso-fortran-binding.cpp -o /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/tools/flang/test/Integration/Output/iso-fortran-binding.cpp.tmp/a.out
/home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/tools/flang/test/Integration/Output/iso-fortran-binding.cpp.tmp/a.out | /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/bin/FileCheck /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/llvm-project/flang/test/Integration/iso-fortran-binding.cpp # RUN: at line 5
+ /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/tools/flang/test/Integration/Output/iso-fortran-binding.cpp.tmp/a.out
+ /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/bin/FileCheck /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/llvm-project/flang/test/Integration/iso-fortran-binding.cpp
Could not load program /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/tools/flang/test/Integration/Output/iso-fortran-binding.cpp.tmp/a.out:
	Dependent module libc.a(shr_64.o) could not be loaded.
Could not load module libc.a(shr_64.o).
System error: No such file or directory
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/build/bin/FileCheck /home/llvm/llvm-external-buildbots/workers/ppc64-flang-aix-test/ppc64-flang-aix-build/llvm-project/flang/test/Integration/iso-fortran-binding.cpp

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/152914