https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103407
Bug ID: 103407
Summary: [12 regression] abi_check FAILs on Solaris
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: *-*-solaris2.11
Between 20211111 (dc002e31fb2d001703278263ea3d1cef366018ae) and 20211113
(a246d7230b8f8b059b21a073e8a91c213dee9cf4),
abi_check began to FAIL on Solaris, both sparc and x86, 32 and 64-bit:
+FAIL: libstdc++-abi/abi_check
3 incompatible symbols
0
_ZSt10from_charsPKcS0_RfSt12chars_format
std::from_chars(char const*, char const*, float&, std::chars_format)
version status: incompatible
GLIBCXX_3.4.29
type: function
status: added
1
_ZSt10from_charsPKcS0_ReSt12chars_format
std::from_chars(char const*, char const*, long double&, std::chars_format)
version status: incompatible
GLIBCXX_3.4.29
type: function
status: added
2
_ZSt10from_charsPKcS0_RdSt12chars_format
std::from_chars(char const*, char const*, double&, std::chars_format)
version status: incompatible
GLIBCXX_3.4.29
type: function
status: added
This coincides with the introduction of the GLIBCXX_3.4.30 version.
After some searching, I found/remembered that the GCC 11.1 baselines on
Solaris explicitly had omitted those symbols:
https://gcc.gnu.org/pipermail/gcc-patches/2021-March/566167.html
to avoid having separate baselines for Solaris 11.3 (which lacks XPG7 support
and thus uselocale) and 11.4 (which is XPG7 conformant).
I'm uncertain how to handle this:
* bite the bullet and introduce separate baselines for both versions (still
supported by GCC 12)
* filter out those symbols when generating baseline_symbols.txt
* something else
