Re: Linux x86 to Solaris Sparc Cross Compiler

[Kai Ruottu <karuottu at freenet dot hut dot fi>]

Alex Smith wrote:
 
> I am trying to create a cross compiler from a Rh6.1 to a Solaris Sparc 2.5.1
> machine.
> 
> Here is my error message:
> /export/home/alesmi/compliers/solaris-sparc2.5.1/gcc/xgcc -B/export/home/alesmi/compliers/solaris-sparc2.5.1/gcc/ -B/usr/local/2.95.2/sparc-sun-solaris2.5.1/bin/ -I/usr/local/2.95.2/sparc-sun-solaris2.5.1/include  -c -o crt1.o -x assembler-with-cpp ../../gcc-2.95.2/gcc/config/sparc/sol2-c1.asm
> _muldi3
> as: option `-s' is ambiguous
> make[1]: *** [crt1.o] Error 1
>
> Also, I found a thread from back in mid-febuary about troubles similar mine
> with a solaris x86 to solaris-sparc cross.  Their problem was resolved by Kai
> who traced it to a bad DEFINE in gcc/config/i386/sol2gas.h.
> 
> My problem is caused by gcc/config/sparc/sol2.h in the ASM_SPECS section.

 The same kind of method can be used with this too. But you can also
simply edit the
resulted 'gcc/specs' and remove the bad '-s' from the '*asm:'-spec...

 A 'clean' way could be to change the config entry in configure as
follows :

--------------------------- clip -------------------------------
	sparc-*-solaris2*)
		if test x$gnu_ld = xyes
		then
			tm_file=sparc/sol2.h
		else
			tm_file=sparc/sol2-sld.h
		fi
+		if test x$gas = xyes;
+		then
+		    # Only needed if gas does not support -s
+		    tm_file="sparc/sol2gas.h ${tm_file}"
+		fi
		xm_file="xm-siglist.h sparc/xm-sysv4.h sparc/xm-sol2.h"
		xm_defines="USG POSIX"
		tmake_file=sparc/t-sol2
		xmake_file=sparc/x-sysv4
		extra_parts="crt1.o crti.o crtn.o gcrt1.o gmon.o crtbegin.o crtend.o"
		case $machine in
		*-*-solaris2.[0-4])
			float_format=i128
			;;
		*)
			float_format=none
			;;
		esac
		if test x${enable_threads} = x; then
		    enable_threads=$have_pthread_h
		    if test x${enable_threads} = x; then
			enable_threads=$have_thread_h
		    fi
		fi
		if test x${enable_threads} = xyes; then
		    if test x${have_pthread_h} = xyes; then
			thread_file='posix'
		    else
			thread_file='solaris'
		    fi
		fi
		;;
--------------------------- clip -------------------------------

so 'sol2gas.h' will be included before 'sol.h' or 'sol2-sld.h', and add
the
following 'sol2gas.h' into 'gcc/config/sparc :

--------------------------- clip -------------------------------
/* Definitions of target machine for GNU compiler, for SPARC running
   Solaris 2 with GNU as up to 2.9.5.0.12.
   
   Copyright (C) 1999 Free Software Foundation, Inc.
*/

#ifndef GAS_REJECTS_MINUS_S
#define GAS_REJECTS_MINUS_S 1
#endif

/* Assume sol2.h will be included afterwards.  */
--------------------------- clip -------------------------------

The 'gcc/config/sparc/sol2.h' should be patched too :

--------------------------- clip -------------------------------
*** sol2.bak	Tue Dec 28 20:54:12 1999
--- sol2.h	Sat Mar 18 11:12:10 2000
***************
*** 35,40 ****
--- 35,42 ----
  %{compat-bsd:-iwithprefixbefore ucbinclude -I/usr/ucbinclude} \
  "
  
+ #if ! GAS_REJECTS_MINUS_S
+ 
  /* The sun bundled assembler doesn't accept -Yd, (and neither does
gas).
     It's safe to pass -s always, even if -g is not used. */
  #undef ASM_SPEC
***************
*** 43,48 ****
--- 45,60 ----
  %{fpic:-K PIC} %{fPIC:-K PIC} \
  %(asm_cpu) \
  "
+ #else /* GAS_REJECTS_MINUS_S */
+ 
+ /* Same as above, except for -s, unsupported by GNU as. */
+ #undef ASM_SPEC
+ #define ASM_SPEC "\
+ %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} \
+ %{fpic:-K PIC} %{fPIC:-K PIC} \
+ %(asm_cpu) \
+ "
+ #endif /* GAS_REJECTS_MINUS_S */
  
  /* This is here rather than in sparc.h because it's not known what
     other assemblers will accept.  */
--------------------------- clip -------------------------------

 The 'sol2gas.h' was copied 'as is' from the egcs-20000306 snapshots
(from 'gcc/config/i386') and as the comment says, it was aimed to be
put into 'gcc/config/sparc', but then something seemingly happened
and the thing was forgotten. I don't remember who is the Solaris2
maintainer, but forwarding this to him/her, could be thought, the
snapshots didn't have the GNU as possibility handled yet either...

 Perhaps the current gas snapshots already support the '-s', but with
with GNU as up to 2.9.5.0.12 this kind of handling seems to be needed.

Cheers, Kai


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