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Compile against root file system
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Compile against root file system

Created by Bayou.

A very short introduction

I once had to compile Etnaviv for a device I was porting. I used Debian Stretch (later migrated to Buster) with the mainstream Linux 4.19 kernel.

I used the libdrm-armada and xf86-video-armada, but will focus to libdrm-armada in this article.

PACKAGE_DIR=libdrm-armada
ROOTFS_DIR=/path/to/rootfs
OUTPUT_DIR=/path/to/some/dir/bin
CROSS_COMPILE=~/gcc-linaro-6.3.1-2017.02-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-
$ autoreconf -f -i -I${ROOTFS_DIR}/usr/share/aclocal ${PACKAGE_DIR}
$ cd ${ROOTFS_DIR}
./configure --prefix=${OUTPUT_DIR} --host=$(basename ${CROSS_COMPILE:-=})
$ make
$ make install

Target the root file system

Add --sysroot=/path/to/rootfs to LDFLAGS

$ ./configure --prefix=${OUTPUT_DIR} --host=$(basename ${CROSS_COMPILE:-=}) \
LDFLAGS=--sysroot=${ROOTFS_DIR}

No package 'libdrm' found

That's because the pkg-config from the host is used instead of the root file system.

$ ./configure --prefix=${OUTPUT_DIR} --host=$(basename ${CROSS_COMPILE:-=}) \
LDFLAGS=--sysroot=${ROOTFS_DIR} KG_CONFIG_PATH="${ROOTFS_DIR}/usr/lib/arm-linux-gnueabihf/pkgconfig/"

fatal error: X11/Xprotostr.h: No such file or directory

Include paths are missing at CFLAGS.

$ find ${ROOTFS_DIR} -name Xprotostr.h
${ROOTFS_DIR}/usr/include/X11/Xprotostr.h
$ ./configure --prefix=${OUTPUT_DIR} --host=$(basename ${CROSS_COMPILE:-=}) \
LDFLAGS=--sysroot=${ROOTFS_DIR} KG_CONFIG_PATH="${ROOTFS_DIR}/usr/lib/arm-linux-gnueabihf/pkgconfig/" \
CFLAGS=-I$(OUTPUT_DIR)/include

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