https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81451
Bug ID: 81451
Summary: missing futex check -
libgo/runtime/thread-linux.c:12:0 futex.h:13:12:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘long’
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: go
Assignee: ian at airs dot com
Reporter: mfe at live dot de
CC: cmang at google dot com
Target Milestone: ---
Created attachment 41765
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41765&action=edit
futex of host system
the exact version of GCC:
gcc-7.1.0
the system type:
NetgearReadyNAS Duo
(http://wiki.dietpc.org/index.php/DIET-PC_on_SPARC_ReadyNAS)
the options given when GCC was configured/built:
configure CC=/opt/gcc-4.6/bin/gcc CXX=/opt/gcc-4.6/bin/g++
--enable-languages=c,c++,go --prefix=/opt/gcc-7.1 --with-cpu=v7
--with-mpc=/usr/local --with-mpfr=/usr/local --with-gmp=/usr/local
--with-isl=/usr/local/ --disable-libstdcxx-pch
the complete command line that triggers the bug;
/usr/local/bin/make
the compiler output (error messages, warnings, etc.);
[...]
/bin/sh ./libtool --tag=CC --mode=compile /media/gcc-7.1-compiled/./gcc/xgcc
-B/media/gcc-7.1-compiled/./gcc/ -B/opt/gcc-7.1/sparc-unknown-linux-gnu/bin/
-B/opt/gcc-7.1/sparc-unknown-linux-gnu/lib/ -isystem
/opt/gcc-7.1/sparc-unknown-linux-gnu/include -isystem
/opt/gcc-7.1/sparc-unknown-linux-gnu/sys-include -DHAVE_CONFIG_H -I.
-I../../../gcc-7.1.0/libgo -I ../../../gcc-7.1.0/libgo/runtime
-I../../../gcc-7.1.0/libgo/../libffi/include -I../libffi/include -pthread
-fexceptions -fnon-call-exceptions -fplan9-extensions -Wall -Wextra
-Wwrite-strings -Wcast-qual -Werror -D_GNU_SOURCE -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -I ../../../gcc-7.1.0/libgo/../libgcc -I
../../../gcc-7.1.0/libgo/../libbacktrace -I ../../gcc/include -g -O2 -MT
thread-linux.lo -MD -MP -MF .deps/thread-linux.Tpo -c -o thread-linux.lo `test
-f 'runtime/thread-linux.c' || echo
'../../../gcc-7.1.0/libgo/'`runtime/thread-linux.c
libtool: compile: /media/gcc-7.1-compiled/./gcc/xgcc
-B/media/gcc-7.1-compiled/./gcc/ -B/opt/gcc-7.1/sparc-unknown-linux-gnu/bin/
-B/opt/gcc-7.1/sparc-unknown-linux-gnu/lib/ -isystem
/opt/gcc-7.1/sparc-unknown-linux-gnu/include -isystem
/opt/gcc-7.1/sparc-unknown-linux-gnu/sys-include -DHAVE_CONFIG_H -I.
-I../../../gcc-7.1.0/libgo -I ../../../gcc-7.1.0/libgo/runtime
-I../../../gcc-7.1.0/libgo/../libffi/include -I../libffi/include -pthread
-fexceptions -fnon-call-exceptions -fplan9-extensions -Wall -Wextra
-Wwrite-strings -Wcast-qual -Werror -D_GNU_SOURCE -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -I ../../../gcc-7.1.0/libgo/../libgcc -I
../../../gcc-7.1.0/libgo/../libbacktrace -I ../../gcc/include -g -O2 -MT
thread-linux.lo -MD -MP -MF .deps/thread-linux.Tpo -c
../../../gcc-7.1.0/libgo/runtime/thread-linux.c -fPIC -DPIC -o
.libs/thread-linux.o
In file included from ../../../gcc-7.1.0/libgo/runtime/thread-linux.c:12:0:
/usr/include/linux/futex.h:13:12: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘long’
asmlinkage long sys_futex(u32 __user *uaddr, int op, int val,
^~~~
make[4]: *** [Makefile:1944: thread-linux.lo] Error 1
I'm not sure, but it looks like gcc is expecting a newer version of futex.h
than the host system can provide?
I attached the futex header of the host system which is running the Linux
kernel 2.6.17.14.
Maybe --disable-linux-futex would fix the issue? Is it possible to add manual
the configure parameter --disable-linux-futex afterwards to the libgo
dictionary without reconfiguring and recompiling the current gcc?
