[gcc r11-3756] libstdc++: Adjust variable export in makefile

[gcc r11-3756] libstdc++: Adjust variable export in makefile

[Jonathan Wakely]

https://gcc.gnu.org/g:6ce2cb116af6e0965ff0dd69e7fd1925cf5dc68c

commit r11-3756-g6ce2cb116af6e0965ff0dd69e7fd1925cf5dc68c
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Oct 9 14:07:22 2020 +0100

    libstdc++: Adjust variable export in makefile
    
    We usually export variables in recipes this way. I'm not sure it's
    necessary, but it's consistent.
    
    libstdc++-v3/ChangeLog:
    
            * testsuite/Makefile.am: Set and export variable separately.
            * testsuite/Makefile.in: Regenerate.

Diff:
---
 libstdc++-v3/testsuite/Makefile.am | 2 +-
 libstdc++-v3/testsuite/Makefile.in | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/testsuite/Makefile.am b/libstdc++-v3/testsuite/Makefile.am
index 2fca179fca4..7b412411bfe 100644
--- a/libstdc++-v3/testsuite/Makefile.am
+++ b/libstdc++-v3/testsuite/Makefile.am
@@ -182,7 +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)"; \
+	  CXXFLAGS='$(CXXFLAGS)'; export 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 4e829d0e80f..7418680e935 100644
--- a/libstdc++-v3/testsuite/Makefile.in
+++ b/libstdc++-v3/testsuite/Makefile.in
@@ -703,7 +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)"; \
+	  CXXFLAGS='$(CXXFLAGS)'; export CXXFLAGS; \
 	  ${check_performance_script} ${glibcxx_srcdir} ${glibcxx_builddir})
 
 check-debug: site.exp