if you try compiling with the imx alsa plugins target package you get the following error: asrc_pair.h:28:10: fatal error: linux/mxc_asrc.h: No such file or directory
Most likely, you are trying to build these without using an i.MX-specific Linux kernel. But as documented in ./package/freescale-imx/imx-alsa-plugins/Config.in: comment "imx-alsa-libs needs an imx-specific Linux kernel to be built" depends on BR2_arm depends on !BR2_LINUX_KERNEL There's not much we can do about it: this NXP user-space code includes header files from the i.MX specific Linux kernel.