Bug 878593 – dev-libs/protobuf-c: gcc is unable to compile with -flto

• Status: UNCONFIRMED
• Product: Gentoo Linux

[Description Jocelyn Mayer 2022-10-29 04:22:34 UTC]

If having '-flto' in compilation flags, gcc fails to compile protobuf-c:
t/generated-code2/cxx-generate-packed-data fails to generate test-full-cxx-output.inc
Compiling using '-fno-lto' or using clang is OK

Reproducible: Always

Steps to Reproduce:
1. Add '-flto' to compilation flags
2. Try to build dev-libs/protobuf-c using gcc
3.
Actual Results:  
Build of test programs fails

Expected Results:  
Build to succeed.

Disabling lto when using gcc seems required

[Comment 1 Jocelyn Mayer 2022-10-29 04:23:45 UTC]

Created attachment 825773 [details]
output from emerge --info =dev-libs/protobuf-c-1.4.1

Note that this is the merged version, with '-fno-lto' flags set.

[Comment 2 Jocelyn Mayer 2022-10-29 04:24:33 UTC]

Created attachment 825775 [details]
Emerge failure using gcc and '-flto' flags build log