我需要交叉编译 hostapd，即使在编辑 makefile 进行交叉编译后，仍然会出现上述错误
答案1
如果我们在这里谈论 Ubuntu，所需的标头位于libnl-3-dev包中（完整路径为/usr/include/libnl3/netlink/genl/genl.h）。
在 Ubuntu 16.04 LTS 上hostapd需要以下构建依赖项：
android-headers android-headers-19 autotools-dev debhelper
dh-strip-nondeterminism docbook docbook-dsssl docbook-to-man docbook-utils
jadetex libdbus-1-dev libfile-stripnondeterminism-perl libncurses5-dev
libnl-3-dev libnl-genl-3-dev libnl-route-3-200 libnl-route-3-dev libosp5
libostyle1c2 libpcsclite-dev libpotrace0 libptexenc1 libqt4-designer
libqt4-dev libqt4-dev-bin libqt4-help libqt4-qt3support libqt4-scripttools
libqt4-svg libqt4-test libreadline-dev libreadline6-dev libsgmls-perl
libsp1c2 libssl-dev libsynctex1 libtexlua52 libtexluajit2 libtinfo-dev
libzzip-0-13 lynx lynx-common openjade po-debconf qt4-linguist-tools
qt4-qmake sgml-data sgmlspl sp tex-common texlive-base texlive-binaries
texlive-fonts-recommended texlive-generic-recommended texlive-latex-base
texlive-latex-recommended tipa zlib1g-dev
您应该调整您的构建系统以满足这些依赖关系。