topic Re: imx8mq+4.14.78+yocto:aarch64-poky-linux-gcc: error: unrecognized command line option ‘-mfpu=neon’ in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/imx8mq-4-14-78-yocto-aarch64-poky-linux-gcc-error-unrecognized/m-p/893772#M135112 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>Unfortunately, we are unable to assist you with information related to the ARM processor, mostly because we do not have access to that information. I have found the below, hope it can help you. I apologize for the inconveniences this could give you.&nbsp;&nbsp;</P><P></P><P><A href="https://developer.arm.com/docs/100748/latest/using-common-compiler-options/selecting-floating-point-options">https://developer.arm.com/docs/100748/latest/using-common-compiler-options/selecting-floating-point-options</A></P><P></P><P>Best regards,</P><P>Diego.</P></BODY></HTML> Fri, 07 Jun 2019 18:11:03 GMT diegoadrian 2019-06-07T18:11:03Z imx8mq+4.14.78+yocto:aarch64-poky-linux-gcc: error: unrecognized command line option ‘-mfpu=neon’ https://community.nxp.com/t5/i-MX-Processors/imx8mq-4-14-78-yocto-aarch64-poky-linux-gcc-error-unrecognized/m-p/893769#M135109 <HTML><HEAD></HEAD><BODY><P>Hi community:</P><P>&nbsp;I use imx8mq+4.14.78+yocto bsp，and I "<SPAN style="color: #000000; background-color: #ffffff; font-weight: normal;">bitbake fsl-image-qt5-validation-imx -c populate_sdk</SPAN>"， get the sdk。now I want to compile a ".c" file with options "<SPAN style="color: #0000ff;">-mfpu=neon -mfloat-abi=hard</SPAN>"。</P><P>but I get follow error:</P><P><SPAN style="color: #ff0000;">aarch64-poky-linux-gcc --sysroot=/opt/fsl-imx-wayland/4.14-sumo/sysroots/aarch64-poky-linux -mfpu=neon -mfloat-abi=soft -O3 test_vfp_hard.c -o TEST_VFP_SOFT</SPAN><BR /><SPAN style="color: #ff0000;">aarch64-poky-linux-gcc: error: unrecognized command line option ‘-mfpu=neon’</SPAN><BR /><SPAN style="color: #ff0000;">aarch64-poky-linux-gcc: error: unrecognized command line option ‘-mfloat-abi=soft’</SPAN><BR /><SPAN style="color: #ff0000;">make: *** [soft] Error 1</SPAN></P><P></P><P>How to fix it?</P><P></P><P>Thanks a lot.</P></BODY></HTML> Tue, 14 May 2019 13:13:57 GMT https://community.nxp.com/t5/i-MX-Processors/imx8mq-4-14-78-yocto-aarch64-poky-linux-gcc-error-unrecognized/m-p/893769#M135109 传策薛 2019-05-14T13:13:57Z Re: imx8mq+4.14.78+yocto:aarch64-poky-linux-gcc: error: unrecognized command line option ‘-mfpu=neon’ https://community.nxp.com/t5/i-MX-Processors/imx8mq-4-14-78-yocto-aarch64-poky-linux-gcc-error-unrecognized/m-p/893770#M135110 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>Apparently, you need to export some flags on your makefile:</P><PRE style="color: #24292e; background-color: #f6f8fa; margin-bottom: 16px; padding: 16px;"><CODE style="background: transparent; border: 0px;">export CFLAGS="-mcpu=cortex-a53 -mfloat-abi=hard -mfpu=neon-fp-armv8 -mneon-for-64bits"</CODE></PRE><P>You can find more information on the below web page:</P><P><A href="https://gist.github.com/fm4dd/c663217935dc17f0fc73c9c81b0aa845" rel="nofollow noopener noreferrer" target="_blank">https://gist.github.com/fm4dd/c663217935dc17f0fc73c9c81b0aa845</A></P><P></P><P>Hope this information can help you.</P><P></P><P>Best regards,</P><P>Diego.</P></BODY></HTML> Fri, 17 May 2019 23:49:36 GMT https://community.nxp.com/t5/i-MX-Processors/imx8mq-4-14-78-yocto-aarch64-poky-linux-gcc-error-unrecognized/m-p/893770#M135110 diegoadrian 2019-05-17T23:49:36Z Re: imx8mq+4.14.78+yocto:aarch64-poky-linux-gcc: error: unrecognized command line option ‘-mfpu=neon’ https://community.nxp.com/t5/i-MX-Processors/imx8mq-4-14-78-yocto-aarch64-poky-linux-gcc-error-unrecognized/m-p/893771#M135111 <HTML><HEAD></HEAD><BODY><P>I tried follows:</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/81636iCB13DA4AA7359C42/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P></P><P>It seems aarch64 does not support "-mfloat-abi=hard"，"-mfpu=neon-fp-armv8"， "-mneon-for-64bits".</P><P></P><P><A class="link-titled" href="https://gcc.gnu.org/onlinedocs/gcc/AArch64-Options.html#AArch64-Options" title="https://gcc.gnu.org/onlinedocs/gcc/AArch64-Options.html#AArch64-Options">Using the GNU Compiler Collection (GCC): AArch64 Options</A>&nbsp;</P><P></P><P>I have found some ARM64 information. The aarch64-poky-linux-xx compiler supports hardware floating point arithmetic by default. Is it correct?</P></BODY></HTML> Sat, 18 May 2019 03:13:42 GMT https://community.nxp.com/t5/i-MX-Processors/imx8mq-4-14-78-yocto-aarch64-poky-linux-gcc-error-unrecognized/m-p/893771#M135111 传策薛 2019-05-18T03:13:42Z Re: imx8mq+4.14.78+yocto:aarch64-poky-linux-gcc: error: unrecognized command line option ‘-mfpu=neon’ https://community.nxp.com/t5/i-MX-Processors/imx8mq-4-14-78-yocto-aarch64-poky-linux-gcc-error-unrecognized/m-p/893772#M135112 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>Unfortunately, we are unable to assist you with information related to the ARM processor, mostly because we do not have access to that information. I have found the below, hope it can help you. I apologize for the inconveniences this could give you.&nbsp;&nbsp;</P><P></P><P><A href="https://developer.arm.com/docs/100748/latest/using-common-compiler-options/selecting-floating-point-options">https://developer.arm.com/docs/100748/latest/using-common-compiler-options/selecting-floating-point-options</A></P><P></P><P>Best regards,</P><P>Diego.</P></BODY></HTML> Fri, 07 Jun 2019 18:11:03 GMT https://community.nxp.com/t5/i-MX-Processors/imx8mq-4-14-78-yocto-aarch64-poky-linux-gcc-error-unrecognized/m-p/893772#M135112 diegoadrian 2019-06-07T18:11:03Z