https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96389
Bug ID: 96389
Summary: Compiling MinGW-w64 GCC with LTO results in error:
symbol wrong type (4 vs 3)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: brechtsanders at users dot sourceforge.net
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Created attachment 48959
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48959&action=edit
Build output
I would like to compile my MinGW-w64 build of GCC for Windows (targetting win32
and win64) with the (static) standard libraries containing LTO information.
I added these flag to the configure command:
CXXFLAGS_FOR_TARGET="-flto -ffat-lto-objects"
but then I get errors like this when it tries to build libstdc++-v3:
symbol wrong type (4 vs 3)
After looking on the internet I also tried with this as possible workaround:
LDFLAGS="-fno-use-linker-plugin"
but I got the same errors.
I have attached the complete compiler output.
Are there still known issues with LTO on Windows?
Is it supported to have LTO information in libraries like libgcc_s.a and
libstdc++.a?
If so, what is the correct way to build them?
