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from ab9bd932710 libstdc++: Fix errors from Library Fundamentals TS headers [...] new 61753832491 Switch to a new section if the SECTION_RETAIN bit doesn't match new 2a976020603 Warn used and not used symbols in section with the same name new 151d1347c99 Require .init_array/.fini_array support for SHF_GNU_RETAIN

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Summary of changes: gcc/defaults.h | 11 ++++++ gcc/output.h | 2 +- gcc/testsuite/c-c++-common/attr-used-5.c | 27 ++++++++++++++ gcc/testsuite/c-c++-common/attr-used-6.c | 27 ++++++++++++++ gcc/testsuite/c-c++-common/attr-used-7.c | 9 +++++ gcc/testsuite/c-c++-common/attr-used-8.c | 9 +++++ gcc/testsuite/c-c++-common/attr-used-9.c | 28 +++++++++++++++ gcc/testsuite/lib/target-supports.exp | 2 +- gcc/varasm.c | 60 +++++++++++++++++++++++++++----- 9 files changed, 165 insertions(+), 10 deletions(-) create mode 100644 gcc/testsuite/c-c++-common/attr-used-5.c create mode 100644 gcc/testsuite/c-c++-common/attr-used-6.c create mode 100644 gcc/testsuite/c-c++-common/attr-used-7.c create mode 100644 gcc/testsuite/c-c++-common/attr-used-8.c create mode 100644 gcc/testsuite/c-c++-common/attr-used-9.c