[Bug lto/47241] lto not work on mingw32, reporting 'ld.exe: could not unlink output file'

[coolypf at qq dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47241

--- Comment #1 from coolypf <coolypf at qq dot com> 2011-01-10 13:59:45 UTC ---
same problem on mingw-w64, with error message:


Using built-in specs.
COLLECT_GCC=D:\MinGW\bin\gcc64.exe
COLLECT_LTO_WRAPPER=d:/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/4.6.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../gcc-4.6-20110108/configure --prefix=/gcc4 --enable-threads
--disable-nls --disable-win32-registry --disable-werror --disable-shared
--disable-bootstrap --disable-multilib --disable-libquadmath
--with-ld=/x86_64-w64-mingw32/bin/ld --with-as=/x86_64-w64-mingw32/bin/as
--target=x86_64-w64-mingw32
Thread model: win32
gcc version 4.6.0 20110108 (experimental) (GCC) 
COLLECT_GCC_OPTIONS='-v' '-flto' '-mtune=generic' '-march=x86-64'
 d:/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/4.6.0/cc1.exe -quiet -v
-iprefix d:\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.6.0/ test.c -quiet
-dumpbase test.c -mtune=generic -march=x86-64 -auxbase test -version -flto -o
C:\Users\coolypf\AppData\Local\Temp\ccWy8m2U.s
GNU C (GCC) version 4.6.0 20110108 (experimental) (x86_64-w64-mingw32)
    compiled by GNU C version 4.6.0 20110108 (experimental), GMP version 5.0.1,
MPFR version 3.0.0, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
ignoring nonexistent directory
"d:\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/sys-include"
ignoring duplicate directory
"d:/mingw/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/4.6.0/include"
ignoring duplicate directory
"d:/mingw/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/4.6.0/include-fixed"
ignoring nonexistent directory
"d:/mingw/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/sys-include"
ignoring duplicate directory
"d:/mingw/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/include"
#include "..." search starts here:
#include <...> search starts here:
 d:\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.6.0/include
 d:\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.6.0/include-fixed

d:\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/include
End of search list.
GNU C (GCC) version 4.6.0 20110108 (experimental) (x86_64-w64-mingw32)
    compiled by GNU C version 4.6.0 20110108 (experimental), GMP version 5.0.1,
MPFR version 3.0.0, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 8be092602fa0cd5a35bfde8b7f46ede4
COLLECT_GCC_OPTIONS='-v' '-flto' '-mtune=generic' '-march=x86-64'

d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/bin/as.exe
-v -o C:\Users\coolypf\AppData\Local\Temp\ccc16uMR.o
C:\Users\coolypf\AppData\Local\Temp\ccWy8m2U.s
GNU assembler version 2.21.51 (x86_64-w64-mingw32) using BFD version (GNU
Binutils) 2.21.51.20110109
COMPILER_PATH=d:/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/4.6.0/;d:/mingw/bin/../libexec/gcc/;d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/bin/
LIBRARY_PATH=d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/;d:/mingw/bin/../lib/gcc/;d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/lib/../lib/;d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/lib/
COLLECT_GCC_OPTIONS='-v' '-flto' '-mtune=generic' '-march=x86-64'
 d:/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/4.6.0/collect2.exe -plugin
d:/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/4.6.0/liblto_plugin-0.dll
-plugin-opt=d:/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/4.6.0/lto-wrapper.exe
-plugin-opt=-fresolution=C:\Users\coolypf\AppData\Local\Temp\cckhpf6R.res
-plugin-opt=-pass-through=-lmingw32 -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lmoldname -plugin-opt=-pass-through=-lmingwex
-plugin-opt=-pass-through=-lmsvcrt -plugin-opt=-pass-through=-ladvapi32
-plugin-opt=-pass-through=-lshell32 -plugin-opt=-pass-through=-luser32
-plugin-opt=-pass-through=-lkernel32 -plugin-opt=-pass-through=-lmingw32
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lmoldname
-plugin-opt=-pass-through=-lmingwex -plugin-opt=-pass-through=-lmsvcrt -flto -m
i386pep -Bdynamic
d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/lib/../lib/crt2.o
d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/lib/../lib/crtbegin.o
-Ld:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0 -Ld:/mingw/bin/../lib/gcc
-Ld:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/lib/../lib
-Ld:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/lib
C:\Users\coolypf\AppData\Local\Temp\ccc16uMR.o -lmingw32 -lgcc -lmoldname
-lmingwex -lmsvcrt -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc
-lmoldname -lmingwex -lmsvcrt
d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/lib/../lib/crtend.o
 D:\MinGW\bin\gcc64.exe @C:\Users\coolypf\AppData\Local\Temp\ccycZkKe.args
Using built-in specs.
COLLECT_GCC=D:\MinGW\bin\gcc64.exe
COLLECT_LTO_WRAPPER=d:/mingw/lib/gcc/../../libexec/gcc/x86_64-w64-mingw32/4.6.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../gcc-4.6-20110108/configure --prefix=/gcc4 --enable-threads
--disable-nls --disable-win32-registry --disable-werror --disable-shared
--disable-bootstrap --disable-multilib --disable-libquadmath
--with-ld=/x86_64-w64-mingw32/bin/ld --with-as=/x86_64-w64-mingw32/bin/as
--target=x86_64-w64-mingw32
Thread model: win32
gcc version 4.6.0 20110108 (experimental) (GCC) 
COLLECT_GCC_OPTIONS='-c' '-v' '-mtune=generic' '-march=x86-64'
'-fltrans-output-list=C:\Users\coolypf\AppData\Local\Temp\ccmGzfsc.ltrans.out'
'-fwpa' '-fresolution=C:\Users\coolypf\AppData\Local\Temp\cckhpf6R.res'
 d:/mingw/lib/gcc/../../libexec/gcc/x86_64-w64-mingw32/4.6.0/lto1.exe -quiet
-dumpbase ccc16uMR.o -mtune=generic -march=x86-64 -auxbase ccc16uMR -version
-fltrans-output-list=C:\Users\coolypf\AppData\Local\Temp\ccmGzfsc.ltrans.out
-fwpa -fresolution=C:\Users\coolypf\AppData\Local\Temp\cckhpf6R.res
@C:\Users\coolypf\AppData\Local\Temp\ccW0zfsc
GNU GIMPLE (GCC) version 4.6.0 20110108 (experimental) (x86_64-w64-mingw32)
    compiled by GNU C version 4.6.0 20110108 (experimental), GMP version 5.0.1,
MPFR version 3.0.0, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU GIMPLE (GCC) version 4.6.0 20110108 (experimental) (x86_64-w64-mingw32)
    compiled by GNU C version 4.6.0 20110108 (experimental), GMP version 5.0.1,
MPFR version 3.0.0, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
COMPILER_PATH=d:/mingw/lib/gcc/../../libexec/gcc/x86_64-w64-mingw32/4.6.0/;d:/mingw/lib/gcc/../../libexec/gcc/;d:/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/4.6.0/;d:/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/4.6.0/;d:/mingw/bin/../libexec/gcc/;d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/bin/;d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/bin/
LIBRARY_PATH=d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/;d:/mingw/bin/../lib/gcc/;d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/lib/../lib/;d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/lib/
COLLECT_GCC_OPTIONS='-c' '-v' '-mtune=generic' '-march=x86-64'
'-fltrans-output-list=C:\Users\coolypf\AppData\Local\Temp\ccmGzfsc.ltrans.out'
'-fwpa' '-fresolution=C:\Users\coolypf\AppData\Local\Temp\cckhpf6R.res'
 D:\MinGW\bin\gcc64.exe @C:\Users\coolypf\AppData\Local\Temp\cceW7ylp.args
Using built-in specs.
COLLECT_GCC=D:\MinGW\bin\gcc64.exe
COLLECT_LTO_WRAPPER=d:/mingw/lib/gcc/../../libexec/gcc/x86_64-w64-mingw32/4.6.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../gcc-4.6-20110108/configure --prefix=/gcc4 --enable-threads
--disable-nls --disable-win32-registry --disable-werror --disable-shared
--disable-bootstrap --disable-multilib --disable-libquadmath
--with-ld=/x86_64-w64-mingw32/bin/ld --with-as=/x86_64-w64-mingw32/bin/as
--target=x86_64-w64-mingw32
Thread model: win32
gcc version 4.6.0 20110108 (experimental) (GCC) 
COLLECT_GCC_OPTIONS='-c' '-v' '-mtune=generic' '-march=x86-64' '-fltrans' '-o'
'C:\Users\coolypf\AppData\Local\Temp\ccmGzfsc.ltrans0.ltrans.o'
 d:/mingw/lib/gcc/../../libexec/gcc/x86_64-w64-mingw32/4.6.0/lto1.exe -quiet
-dumpbase ccmGzfsc.ltrans0.o -mtune=generic -march=x86-64 -auxbase-strip
C:\Users\coolypf\AppData\Local\Temp\ccmGzfsc.ltrans0.ltrans.o -version -fltrans
@C:\Users\coolypf\AppData\Local\Temp\ccyWTiti -o
C:\Users\coolypf\AppData\Local\Temp\ccWIDrMq.s
GNU GIMPLE (GCC) version 4.6.0 20110108 (experimental) (x86_64-w64-mingw32)
    compiled by GNU C version 4.6.0 20110108 (experimental), GMP version 5.0.1,
MPFR version 3.0.0, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU GIMPLE (GCC) version 4.6.0 20110108 (experimental) (x86_64-w64-mingw32)
    compiled by GNU C version 4.6.0 20110108 (experimental), GMP version 5.0.1,
MPFR version 3.0.0, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
COLLECT_GCC_OPTIONS='-c' '-v' '-mtune=generic' '-march=x86-64' '-fltrans' '-o'
'C:\Users\coolypf\AppData\Local\Temp\ccmGzfsc.ltrans0.ltrans.o'

d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/bin/as.exe
-v -o C:\Users\coolypf\AppData\Local\Temp\ccmGzfsc.ltrans0.ltrans.o
C:\Users\coolypf\AppData\Local\Temp\ccWIDrMq.s
GNU assembler version 2.21.51 (x86_64-w64-mingw32) using BFD version (GNU
Binutils) 2.21.51.20110109
COMPILER_PATH=d:/mingw/lib/gcc/../../libexec/gcc/x86_64-w64-mingw32/4.6.0/;d:/mingw/lib/gcc/../../libexec/gcc/;d:/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/4.6.0/;d:/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/4.6.0/;d:/mingw/bin/../libexec/gcc/;d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/bin/;d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/bin/
LIBRARY_PATH=d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/;d:/mingw/bin/../lib/gcc/;d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/lib/../lib/;d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/lib/
COLLECT_GCC_OPTIONS='-c' '-v' '-mtune=generic' '-march=x86-64' '-fltrans' '-o'
'C:\Users\coolypf\AppData\Local\Temp\ccmGzfsc.ltrans0.ltrans.o'
d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.6.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
could not unlink output file
collect2: ld returned 1 exit status


no problem with snapshot 20110101