Victor, Yes, the little endian tool chain support armv4t soft float. [joelz@git-rtp-01] $ arm-linux-gnueabihf-gcc --print-multi-lib .; arm-linux-gnueabi;@marm@march=armv4t@mfloat-abi=soft
But there is not armv4 support on armeb big endian toolchain. [joelz@ldt-joelz] $ arm-linux-gnueabihf-gcc --print-multi-lib .; It looks like the only choice is to build our own toolchain. Any instruction to build multilib for armv4t? Thanks! Joel From: Victor Chong [mailto:victor.ch...@linaro.org] Sent: Thursday, July 31, 2014 2:12 PM To: Joel (Xi Zhou) Zhou Cc: linaro-toolchain@lists.linaro.org Subject: Re: Linaro toolchain binary allowing soft-float? Joel, Although possibly not fully optimized, soft float configuration for armv4t should still run on armv7. To build your own, I think you'll have to patch the gcc source code to enable multilib (disabled by default) and build the C library twice and figure out a way to combine them. Not exactly sure of the exact process since it's not something we currently do or support. Thanks! On Fri, Aug 1, 2014 at 2:18 AM, Joel (Xi Zhou) Zhou <joel.z...@broadcom.com<mailto:joel.z...@broadcom.com>> wrote: Victor, >From the wiki, it mentions that the soft float (multilib) configuration >supported is armv4t. If we build our own toolchain for soft-float support based on linaro gcc source, is it just a modification of toolchain configuration? Or it need heavy patch for thing like eglibc? Thank you for quick response! Joel From: Victor Chong [mailto:victor.ch...@linaro.org<mailto:victor.ch...@linaro.org>] Sent: Thursday, July 31, 2014 1:04 PM To: Joel (Xi Zhou) Zhou Cc: linaro-toolchain@lists.linaro.org<mailto:linaro-toolchain@lists.linaro.org> Subject: Re: Linaro toolchain binary allowing soft-float? Hi Joel, Please refer to: https://wiki.linaro.org/WorkingGroups/ToolChain/FAQ#How_do_I_use_Linaro.27s_arm-linux-gnueabihf-gcc_from_the_latest_binary_toolchain_release_to_build_applications_for_soft_float_systems.2C_i.e._with_-mfloat-abi.3Dsoft.3F Thanks! On Fri, Aug 1, 2014 at 1:32 AM, Joel (Xi Zhou) Zhou <joel.z...@broadcom.com<mailto:joel.z...@broadcom.com>> wrote: Hi Linaro-toolchain team, I notice that the Linaro toolchain binary only support hard-float. We have a platform which is ARMv7 based does not support VFP. Could you generate toolchain binary for ARmv7 that allows soft-float? Thanks, Joel _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org<mailto:linaro-toolchain@lists.linaro.org> http://lists.linaro.org/mailman/listinfo/linaro-toolchain
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