Refactor build script and configuration for compatibility with cross-compiled OpenSSL and libnl versions, disabling unnecessary EAP methods and adjusting TLS settings to reduce binary size.

build.sh

@@ -60,7 +60,10 @@ if [ -z "${PKG_CONFIG_LIBDIR}" ]; then
   die "No pkg-config directories found in SYSROOT"
 fi
 
-export PKG_CONFIG_SYSROOT_DIR="${SYSROOT}"
+# Not setting PKG_CONFIG_SYSROOT_DIR: this SYSROOT's .pc files already bake
+# in an absolute prefix pointing inside the sysroot itself (from how libnl
+# was configured/installed), so sysroot-prefixing on top of that duplicates
+# the path (.../sysroot/.../sysroot/usr/include/...) and breaks -I/-L.
 export PKG_CONFIG_LIBDIR
 unset PKG_CONFIG_PATH