Re: [arm-embedded] [embedded-7-branch] Remove ARMv7E-M FPV4-SP-D16 build from rmprofile multilib

[Thomas Preudhomme <thomas.preudhomme@foss.arm.com>]

Likewise for embedded-7-branch.

Best regards,

Thomas

On 10/07/17 15:16, Thomas Preudhomme wrote:
> Hi,
> 
> The new instructions in FPV5-SP-D16 compared to FPv4-SP-D16 are not
> generated when building libgcc, newlib of libstdc++ such that libgcc.a,
> libc.a and libstdc++.a have the same objdump output for these two
> variants. It is therefore a waste of build time to be building a
> multilib for ARMv7E-M FPV5-SP-D16 when selecting rmprofile multilib
> variant. This patch applied to embedded-6-branch removes that multilib
> and map FPv5-SP-D16 to FPv4-SP-D16.
> 
> ChangeLog entry is as follows:
> 
> *** gcc/ChangeLog.arm ***
> 
> 2017-07-04  Thomas Preud'homme  <thomas.preudhomme@arm.com>
> 
>      * config/arm/t-rmprofile: Remove multilibs for fpv5-sp-d16 and map it to
>      fpv4-sp-d16.
> 
> Tested by configuring GCC with --with-multilib-list=rmprofile, building it and 
> running the following:
> 
> % ./install/bin/arm-none-eabi-gcc -march=armv7e-m -mfpu=fpv5-sp-d16 
> -mfloat-abi=hard -print-multi-directory
> thumb/v7e-m/fpv4-sp/hard
> 
> % ./install/bin/arm-none-eabi-gcc -march=armv7e-m -mfpu=fpv5-sp-d16 
> -mfloat-abi=softfp -print-multi-directory
> thumb/v7e-m/fpv4-sp/softfp
> 
> Best regards,
> 
> Thomas