From 6bcbda408233f4d1fa01e8982dfe497663fcc73f Mon Sep 17 00:00:00 2001
From: Jouni Malinen <j@w1.fi>
Date: Tue, 8 Jan 2019 13:31:55 +0200
Subject: [PATCH] drivers: Set CONFIG_LIBNL32=y automatically based on
 pkg-config

If the libnl version is not specified explicitly with CONFIG_LIBNL*, try
to check for the most likely case today with pkg-config.

Signed-off-by: Jouni Malinen <j@w1.fi>
---
 src/drivers/drivers.mak | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/drivers/drivers.mak b/src/drivers/drivers.mak
index 56af048d1..442c59cf4 100644
--- a/src/drivers/drivers.mak
+++ b/src/drivers/drivers.mak
@@ -160,6 +160,18 @@ endif
 endif
 
 ifdef NEED_LIBNL
+ifndef CONFIG_LIBNL32
+ifndef CONFIG_LIBNL20
+ifndef CONFIG_LIBNL_TINY
+PKG_CONFIG ?= pkg-config
+HAVE_LIBNL3 := $(shell $(PKG_CONFIG) --exists libnl-3.0; echo $$?)
+ifeq ($(HAVE_LIBNL3),0)
+CONFIG_LIBNL32=y
+endif
+endif
+endif
+endif
+
 ifdef CONFIG_LIBNL32
   DRV_LIBS += -lnl-3
   DRV_LIBS += -lnl-genl-3