New submission from ivank:
Build cpython master with clang -flto results in:
[...]
ar rc libpython3.5m.a Modules/_threadmodule.o Modules/signalmodule.o
Modules/posixmodule.o Modules/errnomodule.o Modules/pwdmodule.o
Modules/_sre.o Modules/_codecsmodule.o Modules/_weakref.o
Modules/_functoolsmodule.o Modules/_operator.o Modules/_collectionsmodule.o
Modules/itertoolsmodule.o Modules/atexitmodule.o Modules/_stat.o
Modules/_localemodule.o Modules/_iomodule.o Modules/iobase.o Modules/fileio.o
Modules/bytesio.o Modules/bufferedio.o Modules/textio.o Modules/stringio.o
Modules/zipimport.o Modules/faulthandler.o Modules/_tracemalloc.o
Modules/hashtable.o Modules/symtablemodule.o Modules/xxsubtype.o
ranlib libpython3.5m.a
clang -pthread -flto -B/usr/lib/gold-ld -flto -B/usr/lib/gold-ld -Xlinker
-export-dynamic -o python Programs/python.o libpython3.5m.a -lpthread -ldl
-lutil -lm
clang -pthread -flto -B/usr/lib/gold-ld -flto -B/usr/lib/gold-ld -Xlinker
-export-dynamic -o Programs/_testembed Programs/_testembed.o libpython3.5m.a
-lpthread -ldl -lutil -lm
inline asm:1:10: error: invalid register name
fmove.l %fpcr,36(%rsp)
^
LLVM ERROR: Error parsing inline asm
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [python] Error 1
make: *** Waiting for unfinished jobs
inline asm:1:10: error: invalid register name
fmove.l %fpcr,36(%rsp)
^
LLVM ERROR: Error parsing inline asm
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [Programs/_testembed] Error 1
My build script was:
#!/bin/bash
# Get clang 3.5 from
# deb http://llvm.org/apt/trusty/ llvm-toolchain-trusty main
# deb-src http://llvm.org/apt/trusty/ llvm-toolchain-trusty main
set -e
sudo ln -sf /usr/lib/llvm-3.5/lib/LLVMgold.so /usr/lib/LLVMgold.so
sudo mkdir -p /usr/lib/bfd-plugins
sudo ln -sf /usr/lib/llvm-3.5/lib/LLVMgold.so /usr/lib/bfd-plugins/LLVMgold.so
grep -Fxq /usr/lib/llvm-3.5/lib /etc/ld.so.conf || (echo /usr/lib/llvm-3.5/lib
should be in /etc/ld.so.conf false)
sudo ldconfig
export CC=clang
export CXX=clang++
export CFLAGS=-O3 -flto -B/usr/lib/gold-ld -fomit-frame-pointer
export CXXFLAGS=-O3 -flto -B/usr/lib/gold-ld -fomit-frame-pointer
export LDFLAGS=-flto -B/usr/lib/gold-ld
make clean || echo Can't make clean
./configure --prefix=/opt/leakless
make -j17
It works fine without the -flto/gold-ld options.
--
components: Interpreter Core
messages: 224613
nosy: ivank
priority: normal
severity: normal
status: open
title: mc68881 fpcr inline asm breaks clang -flto build
type: compile error
versions: Python 3.5
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http://bugs.python.org/issue22126
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