Bug 855227 – dev-ada/libadalang-22.0.0 fails to compile (lto)

• Product: Gentoo Linux
• Status: RESOLVED OBSOLETE

[Description Agostino Sarubbo 2022-06-30 06:02:32 UTC]

https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/

Issue: dev-ada/libadalang-22.0.0 fails to compile (lto).
Discovered on: amd64 (internal ref: lto_tinderbox)

NOTE:
This machine uses lto with CFLAGS=-flto -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing

[Comment 1 Agostino Sarubbo 2022-06-30 06:02:34 UTC]

Created attachment 788834 [details]
build.log

build log and emerge --info

[Comment 2 Agostino Sarubbo 2022-06-30 06:02:36 UTC]

Error(s) that match a know pattern:


    Command '['gprbuild', '-p', '-j16', '-P/var/tmp/portage/dev-ada/libadalang-22.0.0/work/libadalang-22.0.0/build/libadalang.gpr', '-vl', '-XBUILD_MODE=prod', '-XLIBRARY_TYPE=relocatable', '-XGPR_BUILD=relocatable', '-XXMLADA_BUILD=relocatable', '-XLIBADALANG_WARNINGS=true', '-cargs:C', '-O2', '-pipe', '-march=x86-64', '-frecord-gcc-switches', '-fno-diagnostics-color', '-fmessage-length=0', '-flto', '-Werror=odr', '-Werror=lto-type-mismatch', '-Werror=strict-aliasing', '-cargs:Ada', '-O2', '-pipe', '-march=x86-64', '-frecord-gcc-switches', '-fno-diagnostics-color', '-fmessage-length=0', '-flto', '-Werror=odr', '-Werror=lto-type-mismatch', '-Werror=strict-aliasing', '-largs:C', '-Wl,-O1', '-Wl,--as-needed', '-Wl,--defsym=__gentoo_check_ldflags__=0']' returned non-zero exit status 4.
| Community 2020 (20200429-93) (x86_64-pc-linux-gnu) GCC error:            |

[Comment 3 Agostino Sarubbo 2022-06-30 07:30:05 UTC]

I'm not 100% sure that it is an lto fault. After if you dig into it, please remove the blocker bug if you think this has nothing to do with lto. Thanks

[Comment 4 Tupone Alfredo 2022-10-04 06:20:08 UTC]

Please retest by setting

ADA_TARGET="gcc_12_2_0"

in make.conf

This will make use of gcc-12.2.0 that I hope is lto safe

[Comment 5 Tupone Alfredo 2022-11-27 11:30:53 UTC]

Bug related to gnat_2020 that is dropped