[gcc r11-3755] libstdc++: Pass CXXFLAGS to check_performance script

[Jonathan Wakely <redi@gcc.gnu.org>]

https://gcc.gnu.org/g:7e7eef2a1bb45c61ee26936ccaab7159dcceca94

commit r11-3755-g7e7eef2a1bb45c61ee26936ccaab7159dcceca94
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Oct 9 13:59:27 2020 +0100

    libstdc++: Pass CXXFLAGS to check_performance script
    
    It looks like our check-performance target runs completely unoptimized,
    which is a bit silly. This exports the CXXFLAGS from the parent make
    process to the check_performance script.
    
    libstdc++-v3/ChangeLog:
    
            * scripts/check_performance: Use gnu++11 instead of gnu++0x.
            * testsuite/Makefile.am (check-performance): Export CXXFLAGS to
            child process.
            * testsuite/Makefile.in: Regenerate.

Diff:
---
 libstdc++-v3/scripts/check_performance | 2 +-
 libstdc++-v3/testsuite/Makefile.am     | 1 +
 libstdc++-v3/testsuite/Makefile.in     | 1 +
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/libstdc++-v3/scripts/check_performance b/libstdc++-v3/scripts/check_performance
index 3fa927480c9..cde3874741c 100755
--- a/libstdc++-v3/scripts/check_performance
+++ b/libstdc++-v3/scripts/check_performance
@@ -32,7 +32,7 @@ SH_FLAG="-Wl,--rpath -Wl,$BUILD_DIR/../../gcc \
          -Wl,--rpath -Wl,$BUILD_DIR/src/.libs"
 ST_FLAG="-static"
 LINK=$SH_FLAG
-CXX="$COMPILER $INCLUDES $FLAGS -std=gnu++0x $CXXFLAGS $LINK"
+CXX="$COMPILER $INCLUDES $FLAGS -std=gnu++11 $CXXFLAGS $LINK"
 LIBS="./libtestc++.a"
 TESTS_FILE="testsuite_files_performance"
 
diff --git a/libstdc++-v3/testsuite/Makefile.am b/libstdc++-v3/testsuite/Makefile.am
index 9cef1e65e1b..2fca179fca4 100644
--- a/libstdc++-v3/testsuite/Makefile.am
+++ b/libstdc++-v3/testsuite/Makefile.am
@@ -182,6 +182,7 @@ check-compile: testsuite_files ${compile_script}
 check_performance_script=${glibcxx_srcdir}/scripts/check_performance
 check-performance: testsuite_files_performance ${performance_script}
 	-@(chmod + ${check_performance_script}; \
+	  export CXXFLAGS="$(CXXFLAGS)"; \
 	  ${check_performance_script} ${glibcxx_srcdir} ${glibcxx_builddir})
 
 # Runs the testsuite in debug mode.
diff --git a/libstdc++-v3/testsuite/Makefile.in b/libstdc++-v3/testsuite/Makefile.in
index 7be29e59a09..4e829d0e80f 100644
--- a/libstdc++-v3/testsuite/Makefile.in
+++ b/libstdc++-v3/testsuite/Makefile.in
@@ -703,6 +703,7 @@ check-compile: testsuite_files ${compile_script}
 	  ${compile_script} ${glibcxx_srcdir} ${glibcxx_builddir})
 check-performance: testsuite_files_performance ${performance_script}
 	-@(chmod + ${check_performance_script}; \
+	  export CXXFLAGS="$(CXXFLAGS)"; \
 	  ${check_performance_script} ${glibcxx_srcdir} ${glibcxx_builddir})
 
 check-debug: site.exp