Bug#767323: LTO not working: File format not recognized
Eduard Bloch
blade at debian.org
Thu Oct 30 06:56:48 UTC 2014
Package: clang-3.6
Version: 1:3.6~svn218612-1
Severity: normal
Hi,
I am trying to enable link time optimization with clang++. I have a
vague memory of having used it before with 3.4 or 3.5 so I tried again
and nope, doesn't work anymore:
$ clang++-3.6 -flto build/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
/tmp/testCXXCompiler-be6578.o: file not recognized: File format not recognized
clang: error: linker command failed with exit code 1 (use -v to see invocation)
$ cat build/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
#ifndef __cplusplus
# error "The CMAKE_CXX_COMPILER is set to a C compiler"
#endif
int main(){return 0;}
Adding -v flag:
Debian clang version 3.6.0-svn218612-1 (trunk) (based on LLVM 3.6.0)
Target: x86_64-pc-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/bin/../lib/gcc/i586-linux-gnu/4.7
Found candidate GCC installation: /usr/bin/../lib/gcc/i586-linux-gnu/4.7.4
Found candidate GCC installation: /usr/bin/../lib/gcc/i586-linux-gnu/4.8
Found candidate GCC installation: /usr/bin/../lib/gcc/i586-linux-gnu/4.8.3
Found candidate GCC installation: /usr/bin/../lib/gcc/i586-linux-gnu/4.9
Found candidate GCC installation: /usr/bin/../lib/gcc/i586-linux-gnu/4.9.1
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/3.4.6
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.0.4
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.4.6
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.7.4
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.8.3
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9.1
Found candidate GCC installation: /usr/lib/gcc/i586-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/i586-linux-gnu/4.7.4
Found candidate GCC installation: /usr/lib/gcc/i586-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/i586-linux-gnu/4.8.3
Found candidate GCC installation: /usr/lib/gcc/i586-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i586-linux-gnu/4.9.1
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/3.4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.0.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.7.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.3
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.1
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
"/usr/lib/llvm-3.6/bin/clang" -cc1 -triple x86_64-pc-linux-gnu -emit-llvm-bc -disable-free -disable-llvm-verifier -main-file-name testCXXCompiler.cxx -mrelocation-model static -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -target-linker-version 2.24.51.20140918 -v -dwarf-column-info -resource-dir /usr/lib/llvm-3.6/bin/../lib/clang/3.6.0 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-3.6/bin/../lib/clang/3.6.0/include -internal-externc-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdeprecated-macro -fdebug-compilation-dir /home/ed/debian/dev/apt-cacher-ng -ferror-limit 19 -fmessage-length 212 -mstackrealign -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/testCXXCompiler-277a33.o -x c++ build/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
clang -cc1 version 3.6.0 based upon LLVM 3.6.0 default target x86_64-pc-linux-gnu
ignoring nonexistent directory "/include"
ignoring duplicate directory "/usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9"
#include "..." search starts here:
#include <...> search starts here:
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/x86_64-linux-gnu/c++/4.9
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/backward
/usr/local/include
/usr/lib/llvm-3.6/bin/../lib/clang/3.6.0/include
/usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/include
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
"/usr/bin/ld" --hash-style=both --build-id --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a.out /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/crt1.o /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/crti.o /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/crtbegin.o -L/usr/bin/../lib/gcc/x86_64-linux-gnu/4.9 -L/usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu -L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../.. -L/usr/lib/llvm-3.6/bin/../lib -L/lib -L/usr/lib -plugin /usr/lib/llvm-3.6/bin/../lib/LLVMgold.so -plugin-opt=mcpu=x86-64 /tmp/testCXXCompiler-277a33.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/crtend.o /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/crtn.o
/tmp/testCXXCompiler-277a33.o: file not recognized: File format not recognized
clang: error: linker command failed with exit code 1 (use -v to see invocation)
-- System Information:
Debian Release: jessie/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.12.31+ (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages clang-3.6 depends on:
ii binutils 2.24.90.20141023-1
ii libc6 2.19-12
ii libc6-dev 2.19-12
ii libclang-common-3.6-dev 1:3.6~svn218612-1
ii libclang1-3.6 1:3.6~svn218612-1
ii libedit2 3.1-20140620-2
ii libffi6 3.1-2
ii libgcc-4.9-dev 4.9.1-19
ii libgcc1 1:4.9.1-19
ii libllvm3.6 1:3.6~svn218612-1
ii libobjc-4.9-dev 4.9.1-19
ii libstdc++-4.9-dev 4.9.1-19
ii libstdc++6 4.9.1-19
ii libtinfo5 5.9+20140913-1
ii zlib1g 1:1.2.8.dfsg-2
Versions of packages clang-3.6 recommends:
ii llvm-3.6-dev 1:3.6~svn218612-1
ii python 2.7.8-2
Versions of packages clang-3.6 suggests:
ii clang-3.6-doc 1:3.6~svn218612-1
pn gnustep <none>
pn gnustep-devel <none>
-- no debconf information
--
<jjFux> Wirklich schwierig, ein neues fortune unterzubringen. weasel macht nen
netten Spruch und reagiert nicht auf meinen Vorschlag, Alfie schickt
mich zu Zomb, Zomb zu weasel.
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