libgcc is newer than the one about to be installed. If so, don't install
the libgcc.
Having an older libgcc appear in the lookup may result in binaries not
running, as they need symbols from the newer libgcc.
Such a case is PR pkg/54506.
Leaves SunOS unchanged, by request from jperkin.
for ansi.h on netbsd.
gcc{7,8}: document same patch that already existed was upstreamed.
This patch is necessary to build GCC on NetBSD >= 9.0, since changes
to ansi.h resulted in not using the same include guards.
Fixes PR toolchain/54362
GCC 8.3
This is the list of problem reports (PRs) from GCC's bug tracking system that are known to be fixed in the 8.3 release. This list might not be complete (that is, it is possible that some PRs that have been fixed are not listed here).
Windows
https://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=8.3
A C++ Microsoft ABI bitfield layout bug, PR87137 has been fixed. A non-field declaration could cause the current bitfield allocation unit to be completed, incorrectly placing a following bitfield into a new allocation unit. The Microsoft ABI is selected for:
Mingw targets
PowerPC, IA-32 or x86-64 targets when the -mms-bitfields option is specified, or __attribute__((ms_struct)) is used
SuperH targets when the -mhitachi option is specified, or __attribute__((renesas)) is used
GCC 8 introduced additional cases of this defect, but rather than resolve only those regressions, we decided to resolve all the cases of this defect in single change.
Changelog:
This is the list of problem reports (PRs) from GCC's bug tracking system
that are known to be fixed in the 8.2 release. This list might not be
complete (that is, it is possible that some PRs that have been fixed are
not listed here).
General Improvements
Fixed LTO link-time performance problems caused by an overflow in the
partitioning algorithm while building large binaries.
Language Specific Changes
C++
GCC 8.2 fixed a bug introduced in GCC 8.1 affecting passing or returning
of classes with a deleted copy constructor and defaulted trivial move
constructor (bug c++/86094). GCC 8.2 introduces -fabi-version=13 and makes
it the default, ABI incompatibilities between GCC 8.1 and 8.2 can be
reported with -Wabi=12. See C++ changes for more details.
Target Specific Changes
IA-32/x86-64
-mtune=native performance regression bug84413 on Intel Skylake
processors has been fixed.
sun was added as joyent is patching for the same.
this code is only reached if compiling for i386 (or some variation of ppc)
netbsd's stack_chk_fail_local won't work for this.
PR pkg/53436.
