交叉编译glib2.72.1

较早的版本编译起来比较费，要依赖别的库像libffi处理高级语言之间相互调用的问题，zlib等

较新的版本采用meson构建，会自动下载依赖库，所以比较方便。

现在glib源码：http://ftp.acc.umu.se/pub/GNOME/sources/glib/ 我这里下载的是最新的2.72.1

tar xvf glib-2.72.1.tar.xz

cd glib-2.72.1

新建编译脚本arm.sh

#!/bin/bash

if [ -d arm_build ];then
rm -r arm_build
fi
mkdir arm_build
arch='arm-cortex_a9-linux-gnueabi-' #根据实际情况
sys_root=/opt/arm-cortex_a9/arm-cortex_a9-linux-gnueabi/sysroot/   #根据实际情况

echo "[constants]" > cross_file.txt
echo "arch = '${arch}'" >> cross_file.txt
echo "[binaries]" >> cross_file.txt
echo "c = arch + 'gcc'" >> cross_file.txt
echo "cpp = arch + 'g++'" >> cross_file.txt
echo "ar = arch + 'ar'" >> cross_file.txt
echo "ld = arch + 'ld'" >> cross_file.txt
echo "strip = arch + 'strip'" >> cross_file.txt
echo "sys_root = '${sys_root}'" >> cross_file.txt
echo "pkg_config_libdir = '${sys_root}/usr/lib/pkgconfig'" >> cross_file.txt

echo "pkgconfig = 'pkg-config'" >> cross_file.txt

echo "[host_machine]" >> cross_file.txt
echo "system = 'linux'" >> cross_file.txt
echo "cpu_family = 'arm'" >> cross_file.txt
echo "cpu = 'armv7a'" >> cross_file.txt #根据实际情况
echo "endian = 'little'" >> cross_file.txt

#类似于configure功能 meson configure 获取到可配置项
echo "[project options]" >> cross_file.txt
echo "prefix = '/usr'" >> cross_file.txt
echo "selinux = 'disabled'" >> cross_file.txt
echo "libelf = 'disabled'" >> cross_file.txt

#类似于执行configure
meson setup arm_build --cross-file cross_file.txt
cd arm_build
#编译 类似于make
ninja -C arm_build
DESTDIR=/opt/rootfs/xpylib/glib2.72.1 meson install #根据实际情况

没想到这么顺利，都不报错就安装成功了，心里没底去验证一下

--------------------------------------------------------------------

1.编译ffi

./configure --prefix=/opt/rootfs/xpylib/ffi \
CC=arm-cortex_a9-linux-gnueabi-gcc \
--host=arm-linux
make && make install

第二次编译有出错，手动指定libffi的路径

echo "pkg_config_libdir = '/opt/rootfs/xpylib/ffi/lib/pkgconfig'" >> cross_file.txt