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from 670f5095e4a libstdc++: Make preprocessor checks for __cpp_lib_atomic_wa [...] new 6fbec038f7a Use SHF_GNU_RETAIN to preserve symbol definitions
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Summary of changes: gcc/config.in | 7 +++ gcc/configure | 51 ++++++++++++++++++++++ gcc/configure.ac | 20 +++++++++ gcc/doc/sourcebuild.texi | 3 ++ gcc/output.h | 6 ++- gcc/testsuite/c-c++-common/attr-used-2.c | 1 + gcc/testsuite/c-c++-common/attr-used-3.c | 7 +++ gcc/testsuite/c-c++-common/attr-used-4.c | 7 +++ gcc/testsuite/c-c++-common/attr-used.c | 1 + .../gcc.c-torture/compile/attr-used-retain-1.c | 35 +++++++++++++++ .../gcc.c-torture/compile/attr-used-retain-2.c | 16 +++++++ gcc/testsuite/lib/target-supports.exp | 40 +++++++++++++++++ gcc/varasm.c | 15 +++++-- 13 files changed, 205 insertions(+), 4 deletions(-) create mode 100644 gcc/testsuite/c-c++-common/attr-used-3.c create mode 100644 gcc/testsuite/c-c++-common/attr-used-4.c create mode 100644 gcc/testsuite/gcc.c-torture/compile/attr-used-retain-1.c create mode 100644 gcc/testsuite/gcc.c-torture/compile/attr-used-retain-2.c