[glibc] Format test results closer to what DejaGnu does

[Maxim Kuvyrkov <mkuvyrkov@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=02976a4a4b2d01a524b33a508994664ffaf88d79

commit 02976a4a4b2d01a524b33a508994664ffaf88d79
Author: Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>
Date:   Fri May 19 08:28:21 2023 +0000

    Format test results closer to what DejaGnu does
    
    The years of dealing with Binutils, GCC and GDB test results
    made the community create good tools for comparison and analysis
    of DejaGnu test results.  This change allows to use those tools
    for Glibc's test results as well.
    
    The motivation for this change is Linaro's pre-commit testers,
    which use a modified version of GCC's validate_failures.py
    to create test xfail lists with baseline failures and known
    flaky tests.  See below links for an example xfails file (only
    one link is supposed to work at any given time):
    - https://ci.linaro.org/job/tcwg_glibc_check--master-arm-build/lastSuccessfulBuild/artifact/artifacts/artifacts.precommit/sumfiles/xfails.xfail/*view*/
    - https://ci.linaro.org/job/tcwg_glibc_check--master-arm-build/lastSuccessfulBuild/artifact/artifacts/sumfiles/xfails.xfail/*view*/
    
    Specifacally, this patch changes format of glibc's .sum files from ...
    <cut>
    FAIL: elf/test1
    PASS: string/test2
    </cut>
    ... to ...
    <cut>
                 === glibc tests ===
    
    Running elf ...
    FAIL: elf/test1
    
    Running string ...
    PASS: string/test2
    </cut>.
    
    And output of "make check" from ...
    <cut>
    FAIL: elf/test1
    </cut>
    ... to ...
    <cut>
    FAIL: elf/test1
                    === Summary of results ===
          1 FAIL
          1 PASS
    </cut>.
    
    Signed-off-by: Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

Diff:
---
 Makefile                      | 11 +++++++----
 scripts/merge-test-results.sh |  3 +++
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index b938721166..a4f3378e21 100644
--- a/Makefile
+++ b/Makefile
@@ -577,11 +577,14 @@ $(objpfx)lint-makefiles.out: scripts/lint-makefiles.sh
 	$(SHELL) $< "$(PYTHON)" `pwd` > $@ ; \
 	$(evaluate-test)
 
+# Print test summary for tests in $1 .sum file;
+# $2 is optional test identifier.
+# Fail if there are unexpected failures in the test results.
 define summarize-tests
-@grep -E -v '^(PASS|XFAIL):' $(objpfx)$1 || true
-@echo "Summary of test results$2:"
-@sed 's/:.*//' < $(objpfx)$1 | sort | uniq -c
-@! grep -E -q -v '^(X?PASS|XFAIL|UNSUPPORTED):' $(objpfx)$1
+@grep -E '^[A-Z]+:' $(objpfx)$1 | grep -E -v '^(PASS|XFAIL):' || true
+@echo "		=== Summary of results$2 ==="
+@sed -e '/:.*/!d' -e 's/:.*//' < $(objpfx)$1 | sort | uniq -c
+@! grep -E '^[A-Z]+:' $(objpfx)$1 | grep -E -q -v '^(X?PASS|XFAIL|UNSUPPORTED):'
 endef
 
 # The intention here is to do ONE install of our build into the
diff --git a/scripts/merge-test-results.sh b/scripts/merge-test-results.sh
index e4dcc2520a..8f9d81f6eb 100755
--- a/scripts/merge-test-results.sh
+++ b/scripts/merge-test-results.sh
@@ -50,7 +50,10 @@ case $type in
   -t)
     subdir_file_name=$1
     shift
+    echo "		=== glibc tests ==="
     for d in "$@"; do
+      echo
+      echo "Running $d ..."
       if [ -f "$objpfx$d/$subdir_file_name" ]; then
 	cat "$objpfx$d/$subdir_file_name"
       else