[Bug other/63929] New: GCC sets soft-float ABI even is specified -mfloat-abi=hard when compiling an assembler file.

[Bug other/63929] New: GCC sets soft-float ABI even is specified -mfloat-abi=hard when compiling an assembler file.

[nataliia.koval at globallogic dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63929

            Bug ID: 63929
           Summary: GCC sets soft-float ABI even is specified
                    -mfloat-abi=hard when compiling an assembler file.
           Product: gcc
           Version: 4.8.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nataliia.koval at globallogic dot com

I have a simple source : 
---- test.s ----------------------
    .syntax unified
    .arch armv7-a
    .fpu vfpv3-d16
    .thumb
    .file    "test.c"
    .global    a
    .data
    .align    2
    .type    a, %object
    .size    a, 4
a:
    .word    2330
    .section    .note.GNU-stack,"",%progbits
-----------------------------------

Compile it:

gcc -D_REENTRANT -DU_ATTRIBUTE_DEPRECATED= -O2 -g -march=armv7-a
-mfloat-abi=hard -mthumb -mabi=aapcs-linux -Wall -ansi -pedantic -Wshadow
-Wpointer-arith -Wmissing-prototypes -Wwrite-strings -Wno-long-long  -c -DPIC
-fPIC -o test.o test.s

gcc -O2 -g -march=armv7-a -mfloat-abi=hard -mthumb -mabi=aapcs-linux -Wall
-ansi -pedantic -Wshadow -Wpointer-arith -Wmissing-prototypes -Wwrite-strings
-Wno-long-long -shared -Wl,-Bsymbolic -nodefaultlibs -nostdlib -o test.so
test.o   -Wl,-Bsymbolic


So Flags is rewrited to 'soft-float':

readelf -a test.so |grep Flags
  Flags:                             0x5000200, Version5 EABI, soft-float ABI
Key to Flags:


If specify explicitly .eabi_attribute here:
------ test1.s -------------------
    .syntax unified
    .arch armv7-a
    .eabi_attribute 28, 1
    .fpu vfpv3-d16
    .thumb
    .file    "test.c"
    .global    a
    .data
    .align    2
    .type    a, %object
    .size    a, 4
a:
    .word    2330
    .section    .note.GNU-stack,"",%progbits
----------------------------------------------

it will work correctly now:

readelf -a test1.so |grep Flags
  Flags:                             0x5000400, Version5 EABI, hard-float ABI
Key to Flags:

[Bug other/63929] GCC sets soft-float ABI even is specified -mfloat-abi=hard when compiling an assembler file.

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63929

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
This is nothing to do with the compiler.  Attributes are derived from
annotations in the assembly file (GCC generates assembly code when compiling
C/C++/Fortran, etc and puts the relevant annotations in for you, but can't do
that for assembler source).

If you write assembly code, you'll have to manually attribute your source code.