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gcc/libstdc++-v3
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Jonathan Wakely c7fc73ee45 libstdc++: Allow seeding random engines in testsuite 
The testsuite utilities that use random numbers use a
default-constructed mersenne_twister_engine, meaning the values are
reproducable. This adds support for seeding them, controlledby an
environment variable. Defining GLIBCXX_SEED_TEST_RNG=val in the
environment will cause the engines to be seeded with atoi(val) if that
is non-zero, or with a value read from std::random_device otherwise.

Running with different seeds revealed some bugs in the tests, where a
randomly selected iterator was past-the-end (which can't be erased), or
where the randomly populated container was empty, and then we tried to
remove elements from it unconditionally.

libstdc++-v3/ChangeLog:

	* testsuite/util/exception/safety.h (setup_base::generate):
	Support seeding random engine.
	(erase_point, erase_range): Adjust range of random numbers to
	ensure dereferenceable iterators are used where required.
	(generation_prohibited::run): Do not try to erase from empty
	containers.
	* testsuite/util/testsuite_containergen.h (test_containers):
	Support seeding random engine.
2021-03-25 18:21:19 +00:00
..
config libstdc++: Remove symbols for new std::call_once implementation [PR 99341] 2021-03-16 12:25:28 +00:00
doc libstdc++: Document library versioning for GCC 11 2021-02-25 15:35:59 +00:00
include libstdc++: Avoid accidental ADL when calling make_reverse_iterator 2021-03-23 16:34:42 +00:00
libsupc++ libstdc++: Implement LWG 3530 for concept-constrained comparisons 2021-03-10 15:27:06 +00:00
po Update copyright years. 2021-01-04 10:26:59 +01:00
python libstdc++: Fix find_type helper to work consistently 2021-03-11 17:52:56 +00:00
scripts libstdc++: Add simd testsuite 2021-01-27 16:37:26 +00:00
src libstdc++: Remove symbols for new std::call_once implementation [PR 99341] 2021-03-16 12:25:28 +00:00
testsuite libstdc++: Allow seeding random engines in testsuite 2021-03-25 18:21:19 +00:00
acinclude.m4 libstdc++: Test errno macros directly, not via autoconf [PR 93151] 2020-12-16 13:36:02 +00:00
aclocal.m4 Add `--with-toolexeclibdir=' configuration option 2020-01-24 11:24:25 +00:00
ChangeLog Daily bump. 2021-03-24 00:16:25 +00:00
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ChangeLog-2019 libstdc++: Fix whitespace in ChangeLog-2019 2020-01-09 21:31:35 +00:00
ChangeLog-2020 libstdc++: Fix typo in ChangeLog-2020 2021-01-13 11:02:13 +00:00
config.h.in libstdc++: Regenerate autoconf files 2020-12-17 14:02:59 +00:00
configure Update GNU/Hurd configure support 2021-01-05 16:04:14 -07:00
configure.ac libstdc++: Add C++ runtime support for new 128-bit long double format 2020-12-16 23:25:01 +00:00
configure.host Scope libstdc++ configuration for vxworks to all versions 2020-10-22 16:40:57 +00:00
crossconfig.m4 Scope libstdc++ configuration for vxworks to all versions 2020-10-22 16:40:57 +00:00
fragment.am libstdc++: Add C++ runtime support for new 128-bit long double format 2020-12-16 23:25:01 +00:00
linkage.m4
Makefile.am Update copyright years. 2021-01-04 10:26:59 +01:00
Makefile.in libstdc++: Add C++ runtime support for new 128-bit long double format 2020-12-16 23:25:01 +00:00
README

README 

file: libstdc++-v3/README

New users may wish to point their web browsers to the file
index.html in the 'doc/html' subdirectory.  It contains brief
building instructions and notes on how to configure the library in
interesting ways.