linux-kernel - Re: [PATCH 8/8] selftests/vm: hmm-tests: remove the libhugetlbfs dependency

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Date:   Mon, 28 Sep 2020 13:45:57 -0700
From:   John Hubbard <jhubbard@...dia.com>
To:     Jason Gunthorpe <jgg@...pe.ca>
CC:     Andrew Morton <akpm@...ux-foundation.org>,
        Jonathan Corbet <corbet@....net>,
        Jérôme Glisse <jglisse@...hat.com>,
        Ralph Campbell <rcampbell@...dia.com>,
        Shuah Khan <shuah@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        <linux-kselftest@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linux-s390@...r.kernel.org>
Subject: Re: [PATCH 8/8] selftests/vm: hmm-tests: remove the libhugetlbfs
 dependency

On 9/28/20 1:18 PM, John Hubbard wrote:
> On 9/28/20 6:02 AM, Jason Gunthorpe wrote:
>> On Sun, Sep 27, 2020 at 11:21:59PM -0700, John Hubbard wrote:
> ...
>>> +gcc -c $tmpfile_c -o $tmpfile_o >/dev/null 2>&1
>>
>> This gcc has to come from some makefile variable
  I plan on posting a v2 with this additional change, to fix the above point:

diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index 986a90fa9653..019cbb7f3cf8 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile
@@ -138,7 +138,7 @@ $(OUTPUT)/hmm-tests: local_config.h
  $(OUTPUT)/hmm-tests: LDLIBS += $(HMM_EXTRA_LIBS)

  local_config.mk local_config.h: check_config.sh
-	./check_config.sh
+	./check_config.sh $(CC)

  EXTRA_CLEAN += local_config.mk local_config.h

diff --git a/tools/testing/selftests/vm/check_config.sh b/tools/testing/selftests/vm/check_config.sh
index 651a4b192479..079c8a40b85d 100755
--- a/tools/testing/selftests/vm/check_config.sh
+++ b/tools/testing/selftests/vm/check_config.sh
@@ -16,7 +16,8 @@ echo "#include <sys/types.h>"        > $tmpfile_c
  echo "#include <hugetlbfs.h>"       >> $tmpfile_c
  echo "int func(void) { return 0; }" >> $tmpfile_c

-gcc -c $tmpfile_c -o $tmpfile_o >/dev/null 2>&1
+CC=${1:?"Usage: $0 <compiler> # example compiler: gcc"}
+$CC -c $tmpfile_c -o $tmpfile_o >/dev/null 2>&1

  if [ -f $tmpfile_o ]; then
      echo "#define LOCAL_CONFIG_HAVE_LIBHUGETLBFS 1" > $OUTPUT_H_FILE



thanks,
-- 
John Hubbard
NVIDIA