在ubuntu上编译 wpa_supplicant-2.6

1.1 libnl-3.4.0
./configure --prefix=/home/fnie/wpa/out/libnl --disable-static
make
make check
make install
// to install the API documentation:
mkdir -vp /home/fnie/wpa/out/libnl/doc
tar -xf ../libnl-doc-3.4.0.tar.gz --strip-components=1 --no-same-owner -C /home/fnie/wpa/out/libnl/doc

1.2 libnl-1.1-stable
后面编译 wpa_supplicant-2.6 时报错，"can't find -lnl"，所以编译 libnl-1.1-stable。
./configure --prefix=/home/fnie/wpa/out/libnl-1.1-stable
make
make check
make install
// to install the API documentation:
mkdir -vp /home/fnie/wpa/out/libnl/doc
tar -xf ../libnl-doc-3.4.0.tar.gz --strip-components=1 --no-same-owner -C /home/fnie/wpa/out/libnl/doc

2. openssl
   ./config shared --prefix=/home/fnie/wpa/out/ssl/prefix --openssldir=/home/fnie/wpa/out/ssl/configuration
   make
   make test
   make install

3. wpa_supplicant-2.6
   cd ~/wpa/wpa_supplicant-2.6/wpa_supplicant
   cp defconfig .config
   修改配置文件 .config，在"#Uncomment following two linee and fix..."下增加如下语句，用来添加openssl和libnl的头文件和库文件目录，更新编译链接环境变量：
   CFLAGS += -I/home/fnie/wpa/out/ssl/prefix/include
   CFLAGS += -I/home/fnie/wpa/out/libnl/include
   LIBS += -L/home/fnie/wpa/out/ssl/prefix/lib
   LIBS += -L/home/fnie/wpa/out/libnl/lib
   LIBS += -L/home/fnie/wpa/out/libnl-1.1-stable/lib
   LIBS_p += -L/home/fnie/wpa/out/ssl/prefix/lib

   执行 make 进行编译，成功后生成三个目标文件 wpa_supplicant, wpa_cli, wpa_passphrase 。