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Re: [PATCH mips] Pass -msoft-float/-mhard-float flags to GAS


On Fri, 2014-08-08 at 08:38 -0700, Steve Ellcey wrote:
> Recent changes to the MIPS binutils sources have made it necessary for
> GCC to pass the -msoft-float to the assembler if it wants an object
> file marked as soft-float.  This patch makes GCC pass any -mhard-float,
> or -msoft-float flags that were used on the compile line on to the
> assembler so the executable is marked appropriately.  I did not do
> anything with -mno-float because the GNU assembler doesn't have a 
> -mno-float flag.
> 
> Without this patch (and a second one I will submit shortly) I cannot
> build soft-float multilibs with the latest GCC and top-of-tree binutils.
> 
> Tested with the mips-mti-linux-gnu toolchain.
> 
> OK to checkin?
> 
> Steve Ellcey
> sellcey@mips.com

Matthew Fortune pointed out that -msingle-float has the same issue.  I
didn't run into it because I wasn't building single-float multilibs but
I modified this patch to pass -msingle-float and -mdouble-float to the
assembler as well as -mhard-float and -msoft-float.  Here is the
modified patch to pass all four flags on to the assembler.

Steve Ellcey
sellcey@mips.com

2014-08-08  Steve Ellcey  <sellcey@mips.com>

	* config/mips/mips.h (ASM_SPEC): Pass float options to assembler. 

diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index 8d7a09f..9a15287 100644
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -1187,6 +1187,8 @@ struct mips_cpu_info {
 %{mshared} %{mno-shared} \
 %{msym32} %{mno-sym32} \
 %{mtune=*} \
+%{mhard-float} %{msoft-float} \
+%{msingle-float} %{mdouble-float} \
 %(subtarget_asm_spec)"
 
 /* Extra switches sometimes passed to the linker.  */



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