[Buildroot] [PATCH 1/1] Fix elf2flt build

[Douglas RAILLARD <public.douglas.raillard@gmail.com>]

On 28/08/2015 15:01, Waldemar Brodkorb wrote:
> Please disable UCLIBC_HAS_CONTEXT_FUNCS, as the code is not thumb
> ready. I'll accept any patches for this 

Works better without UCLIBC_HAS_CONTEXT_FUNCS

> NPTL is not thumb ready, please use LINUXTHREADS.OLD for ARM no-MMU
> or send a fix :)

Still fails with LINUXTHREADS_OLD:
/working_dir/buildroot/output/host/usr/bin/arm-buildroot-uclinux-uclibcgnueabi-gcc -c libpthread/linuxthreads.old/mutex.c -o libpthread/linuxthreads.old/mutex.os -Wall -Wstrict-prototypes -Wstrict-aliasing -funsigned-char -fno-builtin -fno-asm -fmerge-all-constants -msoft-float -std=gnu99 -mlittle-endian -fstack-protector -nostdinc -I./include -I./include -include libc-symbols.h -I./libc/sysdeps/linux/arm -I./libc/sysdeps/linux -I./ldso/ldso/arm -I./ldso/include -I. -DSTATIC -Os -fstrict-aliasing -I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux/arm -I./libpthread/linuxthreads.old/sysdeps/arm -I./libpthread/linuxthreads.old/sysdeps/unix/sysv/linux -I./libpthread/linuxthreads.old/sysdeps/pthread -I./libpthread/linuxthreads.old -I./libpthread -I./libc/sysdeps/linux/common -isystem /working_dir/buildroot/output/host/usr/lib/gcc/arm-buildroot-uclinux-uclibcgnueabi/4.9.3/include-fixed -isystem /working_dir/buildroot/output/host/usr/lib/gcc/arm-buildroot-uclinux-uclibcgnueabi
 /4.9.3/in
clude -I/working_dir/buildroot/output/build/linux-headers-4.1.4/usr/include/ -DNDEBUG -DNOT_IN_libc -DIS_IN_libpthread -fstack-protector-all -DIN_LIB=libpthread -fPIC -MT libpthread/linuxthreads.old/mutex.os -MD -MP -MF libpthread/linuxthreads.old/.mutex.os.dep
/tmp/ccWVQC5r.s: Assembler messages:
/tmp/ccWVQC5r.s:34: Error: selected processor does not support ARM opcodes
/tmp/ccWVQC5r.s:35: Error: attempt to use an ARM instruction on a Thumb-only processor -- `swp r3,r3,[r0]'
/tmp/ccWVQC5r.s:36: Error: attempt to use an ARM instruction on a Thumb-only processor -- `orr r0,pc,#1'
/tmp/ccWVQC5r.s:37: Error: attempt to use an ARM instruction on a Thumb-only processor -- `bx r0'
/tmp/ccWVQC5r.s:151: Error: selected processor does not support ARM opcodes
/tmp/ccWVQC5r.s:152: Error: attempt to use an ARM instruction on a Thumb-only processor -- `swp r3,r3,[r0]'
/tmp/ccWVQC5r.s:153: Error: attempt to use an ARM instruction on a Thumb-only processor -- `orr r0,pc,#1'
/tmp/ccWVQC5r.s:154: Error: attempt to use an ARM instruction on a Thumb-only processor -- `bx r0'
Makerules:383: recipe for target 'libpthread/linuxthreads.old/mutex.os' failed
make[1]: *** [libpthread/linuxthreads.old/mutex.os] Error 1
make[1]: Leaving directory '/working_dir/buildroot/output/build/uclibc-1.0.5'
package/pkg-generic.mk:156: recipe for target '/working_dir/buildroot/output/build/uclibc-1.0.5/.stamp_built' failed
make: *** [/working_dir/buildroot/output/build/uclibc-1.0.5/.stamp_built] Error 2

It seems that the problem stems from libpthread/linuxthreads.old/sysdeps/arm/pt-machine.h in testandset function:
     83         "\tswp %0, %2, [%3]\n"
     84         "\torr %1, pc, #1\n"
     85         "\tbx %1\n"


Is it still the good place to send such reports or should I post them somewhere else ? (or in a new thread)


Best regards,

Douglas


-- 

Douglas RAILLARD