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Re: MULTILIB_OPTIONS and DRIVER_SELF_SPEC



On 05/11/2012 03:16 PM, Paulo J. Matos wrote:
> Hi,
> 
> MULTILIB_OPTIONS containing options defined in DRIVER_SELF_SPEC seemed 
> to be fine in GCC46 but fail in GCC47.
> 
> For example, I have:
> xap.h:
> #define DRIVER_SELF_SPECS           \
>          "%{help:-v} %<help",        \
>          "%{mno-args-span-regs-and-mem:-mno-split-args} 
> %<mno-args-span-regs-and-mem", \
>          "%{mno-inline-block-copy-mode:-mno-block-copy} 
> %<mno-inline-block-copy-mode", \
>          "%{mpu:-mno-block-copy -mfunction-ptr-pi} %<mpu"
> 
> t-xap:
> MULTILIB_OPTIONS= msmall-mode/mpu
> 
> However, while building GCC I get that xgcc cannot understand -mpu:
> Running configure in multilib subdir mpu
> pwd: 
> /home/pm18/p4ws/pm18_binutils/bc/main/result/linux/intermediate/FirmwareGcc47Package/xap-local-xap
> mkdir mpu
> configure: creating cache ./config.cache
> checking build system type... i686-pc-linux-gnu
> checking host system type... xap-local-xap
> checking for --enable-version-specific-runtime-libs... no
> checking for a BSD-compatible install... /usr/bin/install -c
> checking for gawk... gawk
> xgcc: error: unrecognized command line option '-mpu'
> 
> 
> What happened in GCC47 for this to occur?

Options not explicitly described in the compiler before their use in a
spec rules are now rejected. So you probably need to describe it into
your target optimization file, (something like xap.opt).

Cheers

Christian
> 
> Cheers,
> 


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