[Bug lto/69003] New: Undefined reference with gcc -r incremental linking

[sirl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69003

            Bug ID: 69003
           Summary: Undefined reference with gcc -r incremental linking
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sirl at gcc dot gnu.org
  Target Milestone: ---

Created attachment 37096
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37096&action=edit
Testcase, use 'gmake all'.

The attached testcase doesn't link with gcc-6 r231874 on x86_64-linux-gnu:

gcc-6 -flto -fuse-linker-plugin -O2 -fno-common -Wall -Wextra -c file1.c
gcc-6 -flto -fuse-linker-plugin -O2 -fno-common -Wall -Wextra -c file2.c
file3.c
gcc-6 -flto -fuse-linker-plugin -O2 -fno-common -Wall -Wextra -DSTATICMODE -c
file3.c -o file3s.o
g++-6 -flto -fuse-linker-plugin  -r -nostdlib -o lib1.lib file1.o file3.o
g++-6 -flto -fuse-linker-plugin  -r -nostdlib -o lib2.lib file2.o file3s.o
g++-6 -flto -fuse-linker-plugin  -O2 -o testexe lib1.lib lib2.lib
lib2.lib: In function `t1':
(.text+0x23): undefined reference to `mode.lto_priv.0'
collect2: error: ld returned 1 exit status

The testcase links fine without LTO.