http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50620
Bug #: 50620
Summary: "undefined reference" errors / csmith lto testing
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: mar...@trippelsdorf.de
Created attachment 25421
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25421
preprocessed testfile
I ran csmith's compiler_test.pl ( http://embed.cs.utah.edu/csmith/ ) overnight:
% cat compiler_test
gcc -O2 -Wfatal-errors -w -flto
% compiler_test.pl 0 compiler_test
...
This produces roughly one "crash" file every 20 minutes. All files show
linker errors of the same type e.g.:
% gcc -O2 -Wfatal-errors -w -flto test.i
/tmp/ccYdYNxC.ltrans1.ltrans.o:ccYdYNxC.ltrans1.o:function func_1.2254: error:
undefined reference to 'g_331.2321.2276'
collect2: error: ld returned 1 exit status
Running without "-flto" or adding "-flto-partition=1to1" resolves the issue.
I've attached one preprocessed file, that was reduced with delta.
