[meta] Issue cleanup

[telans]

Meta issue for closing issues which no longer should be open. Assuming GCC 10.1.0 is the default target as mentioned in the news release.

Inactive/Outdated:

• Multiple build failures #184
• sci-libs/gdal-2.4.3 #461
• sys-libs/libcxxabi-8.0.1 fails to compile #404
• Blender fails to compie with -fuse-ld=bfd #381
• Glibc 2.30 #402
• Problems with gcc9 #317
• spidermonkey:52 build failure #313
• Fallback from -O3 to -O2 -ftree-vectorize #223
• ncurses-5.9-r101 fails #183
• Multiple build failures #184
• sys-boot/grub doesn't recognize sys-fs/fuse when built with LTO under GCC 8.2 #139
• sys-fs/zfs and initramfs #91
• x11-wm/muffin: added workaround for -fno-semantic-interposition #364
• media-libs/graphene: Added workaround for -fno-semantic-interposition #365

Answered questions:

• Should we use the "lto" USE flag for packages which have it? #203
• dev-lang:ocaml-4.09.0: ICE with -fipa-pta #475
• latest sync #412
• ffmpeg-3.4.2 can compile with graphite and lto enabled #103
• What does -fno-common actually do? #324
• Is it normal for GCC 9.1 to be build with stripped flags? #297
• It's not like issue, but as recommendation. #295

Fixed (including upstream):

• libtool errors with -flto and -fno-common #484
• media-gfx/argyllcms-2.1.1 doesn't build with LTO #428
• sys-devel/distcc-3.3.3 fails to configure with LTO #437
• possible lto problem with sys-apps/fwupd efi generated binary #438
• Build Errors caused by LDFLAGS being added to other *FLAGS #408
• Building sys-apps/sandbox with -flto disables sandbox functionality #347
• libaio does not export io_getevents #314
• sys-apps/attr-2.4.48-r3: building with -flto cripples the system #268
• app-doc/doxygen (1.8.14-r1) fails to build with CMAKE_MAKEFILE_GENERATOR=ninja #190
• media-libs/mesa-18.2.* doesn't compile with LTO #143

Cannot reproduce:

• net-libs/mbedtls-2.19.1-r1:0/13::gentoo fails to emerge with "duplicate symbol #479
• net-libs/mbedtls-2.19.1-r1:0/13::gentoo fails to emerge with a "duplicate symbol" error if LTO is enabled #480
• dev-libs/libwacom-1.0 fails to link with LTO #414
• xfce xfconf fails to compile with lto here #405
• sys-fs/btrfs-progs-5.1.1 with lto causes problems #366
• media-libs/glu build failure #371
• xfce4-sensors-plugin-1.3.92 doesn't compile with LTO #249
• dev-libs/protobuf-c: doesn't compile with lto #337

There might be some you wish to be left open - but for the most part I believe these can be closed

@InBetweenNames pinging as updated

[InBetweenNames]

Thanks for taking the time to do this. I agree, the number of issues is a bit out of hand. In the morning I'll officially move all the docs over to GCC 10 and hopefully weed some of these out.

[barolo]

#444 is still an active issue with no resolution in sight, it's lost in bickering between Qt folks and compiler guys, affected projects just disable LTO altogether

[telans]

I think all the above issues should be closed