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This introduces two new procs to replace boilerplate in the effective-target checks. libstdc++-v3/ChangeLog: * testsuite/lib/libstdc++.exp (v3_try_preprocess): Define new proc to preprocess a chunk of code. (v3_check_preprocessor_condition): Define new proc to test a preprocessor condition depending on GCC or libstdc++ macros. (check_v3_target_debug_mode, check_v3_target_normal_mode): Use v3_try_preprocess. (check_v3_target_normal_namespace) (check_v3_target_parallel_mode, check_v3_target_cstdint) (check_v3_target_cmath, check_v3_target_atomic_builtins) (check_v3_target_gthreads, check_v3_target_gthreads_timed) (check_v3_target_sleep, check_v3_target_sched_yield) (check_v3_target_string_conversions, check_v3_target_swprintf) (check_v3_target_binary_io, check_v3_target_nprocs): Use v3_check_preprocessor_condition. (check_effective_target_cxx11): Likewise. (check_effective_target_random_device): Likewise. (check_effective_target_tbb-backend): Likewise. (check_effective_target_futex): Likewise. (check_v3_target_little_endian) Call check_effective_target_le. (check_effective_target_atomic-builtins): New proc to define new effective-target keyword. (check_effective_target_gthreads-timed): Likewise.
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