title: Issues cross compiling libnftnl for arm
body: <p>libnftnl had a dependency on libmnl and I cross compiled libmnl separately for ARM. compiled libs and include dir is present in the location /home/badri/arm_libs/mnl</p>
  <p>./configure --build=x86_64-pc-linux-gnu --host=aarch64-linux-gnu --enable-static=no --prefix=/home/badri/arm_libs/nftnl LIBMNL_LIBS=/home/badri/arm_libs/mnl/lib LIBMNL_CFLAGS=/home/badri/arm_libs/mnl/include LDFLAGS=-L/home/badri/arm_libs/mnl/lib LIBS=-lmnl --includedir=/home/badri/arm_libs/mnl/include</p>
  <p>This configuration is successful. And i can see that the output of 'configure' shows that LIBMNL is present.</p>
  <p>.</p>
  <p>.</p>
  <p>checking pkg-config is at least version 0.9.0... yes</p>
  <p>checking for LIBMNL... yes</p>
  <p>checking for aarch64-linux-gnu-gcc... (cached) aarch64-linux-gnu-gcc</p>
  <p>.</p>
  <p>.</p>
  <p>But when i try to do a make, I get this failure.</p>
  <pre><code>
  badri@badri-All-Series:~/Downloads/libnftnl-1.1.7$ make
  make  all-recursive
  make[1]: Entering directory '/home/badri/Downloads/libnftnl-1.1.7'
  Making all in src
  make[2]: Entering directory '/home/badri/Downloads/libnftnl-1.1.7/src'
    CC       utils.lo
  aarch64-linux-gnu-gcc: warning: /home/badri/arm_libs/mnl/include: linker input file unused because linking not done
    CC       batch.lo
  batch.c:11:10: fatal error: libmnl/libmnl.h: No such file or directory
   #include &lt;libmnl/libmnl.h&gt;
            ^~~~~~~~~~~~~~~~~
  compilation terminated.
  Makefile:702: recipe for target 'batch.lo' failed
  make[2]: *** [batch.lo] Error 1
  make[2]: Leaving directory '/home/badri/Downloads/libnftnl-1.1.7/src'
  Makefile:493: recipe for target 'all-recursive' failed
  make[1]: *** [all-recursive] Error 1
  make[1]: Leaving directory '/home/badri/Downloads/libnftnl-1.1.7'
  Makefile:399: recipe for target 'all' failed
  make: *** [all] Error 2
  badri@badri-All-Series:~/Downloads/libnftnl-1.1.7$ 
  </code></pre>
  <p>Is there anything i am missing with the configure ?</p>
  <p>./configure --help</p>
  <pre><code>$ ./configure --help
  `configure' configures libnftnl 1.1.7 to adapt to many kinds of systems.
  
  Usage: ./configure [OPTION]... [VAR=VALUE]...
  
  To assign environment variables (e.g., CC, CFLAGS...), specify them as
  VAR=VALUE.  See below for descriptions of some of the useful variables.
  
  Defaults for the options are specified in brackets.
  
  Configuration:
    -h, --help              display this help and exit
        --help=short        display options specific to this package
        --help=recursive    display the short help of all the included packages
    -V, --version           display version information and exit
    -q, --quiet, --silent   do not print `checking ...' messages
        --cache-file=FILE   cache test results in FILE [disabled]
    -C, --config-cache      alias for `--cache-file=config.cache'
    -n, --no-create         do not create output files
        --srcdir=DIR        find the sources in DIR [configure dir or `..']
  
  Installation directories:
    --prefix=PREFIX         install architecture-independent files in PREFIX
                            [/usr/local]
    --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
                            [PREFIX]
  
  By default, `make install' will install all the files in
  `/usr/local/bin', `/usr/local/lib' etc.  You can specify
  an installation prefix other than `/usr/local' using `--prefix',
  for instance `--prefix=$HOME'.
  
  For better control, use the options below.
  
  Fine tuning of the installation directories:
    --bindir=DIR            user executables [EPREFIX/bin]
    --sbindir=DIR           system admin executables [EPREFIX/sbin]
    --libexecdir=DIR        program executables [EPREFIX/libexec]
    --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
    --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
    --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
    --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
    --libdir=DIR            object code libraries [EPREFIX/lib]
    --includedir=DIR        C header files [PREFIX/include]
    --oldincludedir=DIR     C header files for non-gcc [/usr/include]
    --datarootdir=DIR       read-only arch.-independent data root [PREFIX/share]
    --datadir=DIR           read-only architecture-independent data [DATAROOTDIR]
    --infodir=DIR           info documentation [DATAROOTDIR/info]
    --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
    --mandir=DIR            man documentation [DATAROOTDIR/man]
    --docdir=DIR            documentation root [DATAROOTDIR/doc/libnftnl]
    --htmldir=DIR           html documentation [DOCDIR]
    --dvidir=DIR            dvi documentation [DOCDIR]
    --pdfdir=DIR            pdf documentation [DOCDIR]
    --psdir=DIR             ps documentation [DOCDIR]
  
  Program names:
    --program-prefix=PREFIX            prepend PREFIX to installed program names
    --program-suffix=SUFFIX            append SUFFIX to installed program names
    --program-transform-name=PROGRAM   run sed PROGRAM on installed program names
  
  System types:
    --build=BUILD     configure for building on BUILD [guessed]
    --host=HOST       cross-compile to build programs to run on HOST [BUILD]
  
  Optional Features:
    --disable-option-checking  ignore unrecognized --enable/--with options
    --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
    --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
    --enable-dependency-tracking
                            do not reject slow dependency extractors
    --disable-dependency-tracking
                            speeds up one-time build
    --enable-silent-rules   less verbose build output (undo: &quot;make V=1&quot;)
    --disable-silent-rules  verbose build output (undo: &quot;make V=0&quot;)
    --enable-static[=PKGS]  build static libraries [default=no]
    --enable-shared[=PKGS]  build shared libraries [default=yes]
    --enable-fast-install[=PKGS]
                            optimize for fast installation [default=yes]
    --disable-libtool-lock  avoid locking (might break parallel builds)
  
  Optional Packages:
    --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
    --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
    --with-pic[=PKGS]       try to use only PIC/non-PIC objects [default=use
                            both]
    --with-aix-soname=aix|svr4|both
                            shared library versioning (aka &quot;SONAME&quot;) variant to
                            provide on AIX, [default=aix].
    --with-gnu-ld           assume the C compiler uses GNU ld [default=no]
    --with-sysroot[=DIR]    Search for dependent libraries within DIR (or the
                            compiler's sysroot if not specified).
  
  Some influential environment variables:
    CC          C compiler command
    CFLAGS      C compiler flags
    LDFLAGS     linker flags, e.g. -L&lt;lib dir&gt; if you have libraries in a
                nonstandard directory &lt;lib dir&gt;
    LIBS        libraries to pass to the linker, e.g. -l&lt;library&gt;
    CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I&lt;include dir&gt; if
                you have headers in a nonstandard directory &lt;include dir&gt;
    PKG_CONFIG  path to pkg-config utility
    PKG_CONFIG_PATH
                directories to add to pkg-config's search path
    PKG_CONFIG_LIBDIR
                path overriding pkg-config's built-in search path
    LIBMNL_CFLAGS
                C compiler flags for LIBMNL, overriding pkg-config
    LIBMNL_LIBS linker flags for LIBMNL, overriding pkg-config
    LT_SYS_LIBRARY_PATH
                User-defined run-time library search path.
    CPP         C preprocessor
  
  Use these variables to override the choices made by `configure' or to help
  it to find libraries and programs with nonstandard names/locations.
  
  Report bugs to the package provider.
  $ 
  </code></pre>