https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61967
Bug ID: 61967
Summary: regression: cannot link with -flto
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: dilyan.palauzov at aegee dot org
I download tar-1.28 from ftp.gnu.org , and ./configure with
CFLAGS='-pipe -O3 -flto -Wl,-S -Wl,--hash-style=gnu -Wl,-O1 -Wl,-z,relro'
If I compile and link with gcc483, everything is fine, but with gcc491 I get:
Making all in rmt
make[2]: Entering directory '/mnt/new/src/tar-1.28/rmt'
gcc -std=gnu99 -pipe -O3 -flto -Wl,-S -Wl,--hash-style=gnu -Wl,-O1
-Wl,-z,relro -L/usr/lib64 -L/lib64 -o rmt rmt.o ../gnu/libgnu.a
/tmp/ccOs1raW.ltrans0.ltrans.o: In function `close_device':
ccOs1raW.ltrans0.o:(.text+0x3b4): undefined reference to `umaxtostr'
/tmp/ccOs1raW.ltrans0.ltrans.o: In function `main':
ccOs1raW.ltrans0.o:(.text.startup+0x1a): undefined reference to
`set_program_name'
ccOs1raW.ltrans0.o:(.text.startup+0x29): undefined reference to
`argp_version_setup'
ccOs1raW.ltrans0.o:(.text.startup+0x1c4): undefined reference to `umaxtostr'
ccOs1raW.ltrans0.o:(.text.startup+0x1e7): undefined reference to `full_write'
ccOs1raW.ltrans0.o:(.text.startup+0x245): undefined reference to `safe_read'
ccOs1raW.ltrans0.o:(.text.startup+0x25f): undefined reference to `umaxtostr'
ccOs1raW.ltrans0.o:(.text.startup+0x282): undefined reference to `full_write'
ccOs1raW.ltrans0.o:(.text.startup+0x295): undefined reference to `xstrdup'
ccOs1raW.ltrans0.o:(.text.startup+0x3f8): undefined reference to `umaxtostr'
ccOs1raW.ltrans0.o:(.text.startup+0x7cc): undefined reference to `umaxtostr'
ccOs1raW.ltrans0.o:(.text.startup+0x860): undefined reference to `full_write'
ccOs1raW.ltrans0.o:(.text.startup+0x89a): undefined reference to `xrealloc'
ccOs1raW.ltrans0.o:(.text.startup+0x8c6): undefined reference to `xrealloc'
collect2: error: ld returned 1 exit status
Makefile:1266: recipe for target 'rmt' failed
make[2]: *** [rmt] Error 1
make[2]: Leaving directory '/mnt/new/src/tar-1.28/rmt'
Makefile:1348: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/mnt/new/src/tar-1.28'
Makefile:1287: recipe for target 'all' failed
make: *** [all] Error 2
Removing -flto leads to successful compilation.
