On Linux/x86_64,

3804e937b0e252a7e42632fe6d9f898f1851a49c is the first bad commit
commit 3804e937b0e252a7e42632fe6d9f898f1851a49c
Author: Mark Wielaard <m...@klomp.org>
Date:   Tue Sep 29 15:52:44 2020 +0200

    Default to DWARF5

caused

FAIL: libstdc++-prettyprinters/80276.cc whatis p4
FAIL: libstdc++-prettyprinters/libfundts.cc print as
FAIL: libstdc++-prettyprinters/libfundts.cc print os

with GCC configured with



To reproduce:

$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="prettyprinters.exp=libstdc++-prettyprinters/80276.cc 
--target_board='unix{-m32}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="prettyprinters.exp=libstdc++-prettyprinters/80276.cc 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="prettyprinters.exp=libstdc++-prettyprinters/80276.cc 
--target_board='unix{-m64}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="prettyprinters.exp=libstdc++-prettyprinters/80276.cc 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="prettyprinters.exp=libstdc++-prettyprinters/libfundts.cc 
--target_board='unix{-m32}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="prettyprinters.exp=libstdc++-prettyprinters/libfundts.cc 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="prettyprinters.exp=libstdc++-prettyprinters/libfundts.cc 
--target_board='unix{-m64}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="prettyprinters.exp=libstdc++-prettyprinters/libfundts.cc 
--target_board='unix{-m64\ -march=cascadelake}'"

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