<html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body> Hi, I try to x-compile gstreamer for an embedded arm (32) device, roughly (using the monorepo instead) following this tutorial: <a class="moz-txt-link-freetext" href="https://www.collabora.com/news-and-blog/blog/2020/05/15/cross-compiling-with-gst-build-and-gstreamer/">https://www.collabora.com/news-and-blog/blog/2020/05/15/cross-compiling-with-gst-build-and-gstreamer/</a> For some reason it chokes on compiling libavutil_arm_float_dsp_neon.S. [5/2396] Compiling C object subprojects/FFmpeg/libavutil-static.a.p/libavutil_arm_float_dsp_neon.S.o FAILED: subprojects/FFmpeg/libavutil-static.a.p/libavutil_arm_float_dsp_neon.S.o arm-linux-gnueabihf-gcc -Isubprojects/FFmpeg/libavutil-static.a.p -Isubprojects/FFmpeg -I../subprojects/FFmpeg -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -std=c99 -O2 -g -D_ISOC99_SOURCE -D_GNU_SOURCE -D_LARGEFILE_SOURCE -DPIC -Wno-parentheses -Wno-pointer-sign -Wno-switch -Wno-format-truncation -Wno-deprecated-declarations -Wno-unused-function -Wno-maybe-uninitialized -Wno-discarded-qualifiers -Wno-unused-variable -Wno-bool-operation -Wno-incompatible-pointer-types -Wno-address -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -mthumb -fPIC -pthread -DHAVE_AV_CONFIG_H -DBUILDING_avutil -MD -MQ subprojects/FFmpeg/libavutil-static.a.p/libavutil_arm_float_dsp_neon.S.o -MF subprojects/FFmpeg/libavutil-static.a.p/libavutil_arm_float_dsp_neon.S.o.d -o subprojects/FFmpeg/libavutil-static.a.p/libavutil_arm_float_dsp_neon.S.o -c ../subprojects/FFmpeg/libavutil/arm/float_dsp_neon.S ../subprojects/FFmpeg/libavutil/arm/float_dsp_neon.S: Assembler messages: ../subprojects/FFmpeg/libavutil/arm/float_dsp_neon.S:29: Error: selected FPU does not support instruction -- `vmul.f32 q8,q0,q2' ../subprojects/FFmpeg/libavutil/arm/float_dsp_neon.S:30: Error: selected FPU does not support instruction -- `vmul.f32 q9,q1,q3' ... many more like this So apparently the compiler assumes a CPU without neon. If I add the appropriate compiler flags manually to the above command it compiles the file fine. The question is, how do I tell meson which features my cpu has, so the correct compiler flags are passed within the build? My guess is that I'm missing out on some banality CPU: processor : 0 model name : ARMv7 Processor rev 10 (v7l) BogoMIPS : 6.00 Features : half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpd32 CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x2 CPU part : 0xc09 CPU revision : 10 processor : 1 model name : ARMv7 Processor rev 10 (v7l) BogoMIPS : 6.00 Features : half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpd32 CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x2 CPU part : 0xc09 CPU revision : 10 Hardware : Freescale i.MX6 Quad/DualLite (Device Tree) Revision : 0000 Serial : 0000000000000000 My cross compile file is: [build_machine] system = 'linux' cpu_family = 'x86_64' cpu = 'x86_64' endian = 'little' [binaries] c = ['arm-linux-gnueabihf-gcc'] cpp = ['arm-linux-gnueabihf-g++'] ar = ['arm-linux-gnueabihf-ar'] pkgconfig = 'pkg-config' strip = ['arm-linux-gnueabihf-strip'] cmake = ['false'] #pkgconfig = ['arm-linux-gnueabihf-pkg-config'] [host_machine] system = 'linux' cpu_family = 'arm' cpu = 'arm' endian = 'little' [properties] c_args = [] cpp_args = [] objc_args = [] objcpp_args = [] c_link_args = ['-L/sysroot/lib', '-Wl,-rpath-link=/sysroot/lib'] cpp_link_args = ['-L/sysroot/lib', '-Wl,-rpath-link=/sysroot/lib'] objc_link_args = ['-L/sysroot/lib', '-Wl,-rpath-link=/sysroot/lib'] objcpp_link_args = ['-L/sysroot/lib', '-Wl,-rpath-link=/sysroot/lib'] pkg_config_libdir = ['/sysroot/lib/pkgconfig:/sysroot/usr/share/pkgconfig'] sys_root = '/sysroot/' Thanks Holger </body> </html>