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Rainer Orth d92b508dd1 libstdc++: Build libbacktrace and 19_diagnostics/stacktrace with -funwind-tables [PR111641] 
Several of the 19_diagnostics/stacktrace tests FAIL on Solaris/SPARC (32
and 64-bit), Solaris/x86 (32-bit only), and several other targets:

FAIL: 19_diagnostics/stacktrace/current.cc  -std=gnu++23 execution test
FAIL: 19_diagnostics/stacktrace/current.cc  -std=gnu++26 execution test
FAIL: 19_diagnostics/stacktrace/entry.cc  -std=gnu++23 execution test
FAIL: 19_diagnostics/stacktrace/entry.cc  -std=gnu++26 execution test
FAIL: 19_diagnostics/stacktrace/output.cc  -std=gnu++23 execution test
FAIL: 19_diagnostics/stacktrace/output.cc  -std=gnu++26 execution test
FAIL: 19_diagnostics/stacktrace/stacktrace.cc  -std=gnu++23 execution test
FAIL: 19_diagnostics/stacktrace/stacktrace.cc  -std=gnu++26 execution test

As it turns out, both the copy of libbacktrace in libstdc++ and the
testcases proper need to compiled with -funwind-tables, as is done for
libbacktrace itself.

This isn't an issue on Linux/x86_64 and Solaris/amd64 since 64-bit x86
always defaults to -funwind-tables.  32-bit x86 does, too, when
-fomit-frame-pointer is enabled as on Linux/i686, but unlike
Solaris/i386.

So this patch always enables the option both for the libbacktrace copy
and the testcases.

Tested on i386-pc-solaris2.11, sparc-sun-solaris2.11, and
x86_64-pc-linux-gnu.

2024-05-23  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	libstdc++-v3:
	PR libstdc++/111641
	* src/libbacktrace/Makefile.am (AM_CFLAGS): Add -funwind-tables.
	* src/libbacktrace/Makefile.in: Regenerate.

	* testsuite/19_diagnostics/stacktrace/current.cc (dg-options): Add
	-funwind-tables.
	* testsuite/19_diagnostics/stacktrace/entry.cc: Likewise.
	* testsuite/19_diagnostics/stacktrace/hash.cc: Likewise.
	* testsuite/19_diagnostics/stacktrace/output.cc: Likewise.
	* testsuite/19_diagnostics/stacktrace/stacktrace.cc: Likewise.

(cherry picked from commit a99ebb88f8f25e76ebed5afc22e64fa77a2f0d3f)
2024-06-04 09:10:24 +02:00
..
config libstdc++: Update powerpc-linux-gnu baseline_symbols 2024-05-03 15:39:00 +02:00
doc libstdc++: Replace link to gcc-4.3.2 docs in manual [PR115269] 2024-06-01 11:01:37 +01:00
include libstdc++: Fix -Wstringop-overflow warning coming from std::vector [PR109849] 2024-06-03 21:52:58 +02:00
libsupc++ libstdc++, Darwin: Handle a linker warning [PR112397]. 2024-02-19 20:14:34 +00:00
po Update copyright years. 2024-01-03 12:19:35 +01:00
python libstdc++: Implement C++26 std::text_encoding (P1885R12) [PR113318] 2024-01-17 11:49:11 +00:00
scripts libstdc++: Rename man pages to use '::' instead of '_' 2024-04-25 18:38:44 +01:00
src libstdc++: Build libbacktrace and 19_diagnostics/stacktrace with -funwind-tables [PR111641] 2024-06-04 09:10:24 +02:00
testsuite libstdc++: Build libbacktrace and 19_diagnostics/stacktrace with -funwind-tables [PR111641] 2024-06-04 09:10:24 +02:00
acinclude.m4 Fix up duplicated words mostly in comments, part 1 2024-04-02 13:39:11 +02:00
aclocal.m4
ChangeLog Daily bump. 2024-06-04 00:23:13 +00:00
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ChangeLog-2023 Rotate ChangeLog files. 2024-01-03 11:29:39 +01:00
config.h.in libstdc++: Implement C++26 std::text_encoding (P1885R12) [PR113318] 2024-01-17 11:49:11 +00:00
configure libstdc++, Darwin: Handle a linker warning [PR112397]. 2024-02-19 20:14:34 +00:00
configure.ac libstdc++, Darwin: Handle a linker warning [PR112397]. 2024-02-19 20:14:34 +00:00
configure.host Fix up duplicated words mostly in comments, part 1 2024-04-02 13:39:11 +02:00
crossconfig.m4
fragment.am
linkage.m4 libstdc++: Remove handling for underscore-prefixed libm functions [PR111638] 2023-11-11 00:41:08 +00:00
Makefile.am Update copyright years. 2024-01-03 12:19:35 +01:00
Makefile.in Allow overriding EXPECT 2023-12-22 10:24:56 +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.