[Bug gold/20308] Gold should support i386 TLS code sequences without PLT

[ncahill_alt at yahoo dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20308

--- Comment #12 from ncahill_alt at yahoo dot com ---
(In reply to H.J. Lu from comment #10)
> (In reply to ncahill_alt from comment #9)
> > Relocation section '.rel.text' at offset 0x2ec contains 12 entries:
> >  Offset     Info    Type            Sym.Value  Sym. Name
> > 00000002  00000b02 R_386_PC32        00000000   __x86.get_pc_thunk.bx
> > 00000008  00000c0a R_386_GOTPC       00000000   _GLOBAL_OFFSET_TABLE_
> > 00000012  00000d12 R_386_TLS_GD      00000000   gd
> > 00000017  00000e04 R_386_PLT32       00000000   ___tls_get_addr
> > 00000022  00000b02 R_386_PC32        00000000   __x86.get_pc_thunk.bx
> > 00000028  00000c0a R_386_GOTPC       00000000   _GLOBAL_OFFSET_TABLE_
> > 00000031  00000d12 R_386_TLS_GD      00000000   gd
> > 00000036  00000e04 R_386_PLT32       00000000   ___tls_get_addr
> > 00000051  00001102 R_386_PC32        00000000   __x86.get_pc_thunk.cx
> > 00000057  00000c0a R_386_GOTPC       00000000   _GLOBAL_OFFSET_TABLE_
> > 00000060  00000d12 R_386_TLS_GD      00000000   gd
> > 00000066  00000e03 R_386_GOT32       00000000   ___tls_get_addr
> > 
> > CFLAGS = -O2 -fno-tree-slsr -march=athlon64 -mtune=core2 -fno-inline -pipe
> > -funroll-loops -funswitch-loops
> > CXXFLAGS = -g -O2
> > LDFLAGS = -Wl,-O1
> > 
> > GCC is 5.2.0, i686-pc-linux-gnu-gcc
> 
> Please show the command line used to compile pr20308_gd.o.

i686-pc-linux-gnu-gcc -Bgcctestdir/ -fPIE -O2 -fno-tree-slsr -march=athlon64
-mtune=core2 -fno-inline -pipe -funroll-loops -funswitch-loops -Bgcctestdir/
-Wl,-R,. -Wl,-O1 -o pr20308a_test pr20308a_test-pr20308_main.o
pr20308a_test-pr20308_def.o pr20308_gd.o pr20308_ld.o -ldl

> 
> BTW, did you run "make clean" first?

Yes, I built binutils from scratch each time.  This all looks odd but
basically...
1.  CFLAGS is very well tested, I won't go into it but it gives helpful
profiling results, for example I was able to report performance issues with
GCC.
2.  CXXFLAGS should have been the same, I had a script that set everything but
I had to recreate it and forgot to set CXXFLAGS.

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