You can just rebuild the package:
Code
PROJECT=Generic ARCH=x86_64 scripts/clean pixman
PROJECT=Generic ARCH=x86_64 scripts/build pixman:host
Or using MT build with generated log:
Code
PROJECT=Generic ARCH=x86_64 scripts/clean pixman
PROJECT=Generic ARCH=x86_64 scripts/buildmt pixman:host
After changing the package contents the clean step is not needed.
Use a pastebin site for posting logs. Please add build.LibreELEC-Generic.x86_64-9.80-devel/build/pixman-0.40.0/.x86_64-linux-gnu/build.ninja
To test configure build type add PKG_TOOLCHAIN="configure" to package.mk.