From 11e3f69eac4a0fe78664ec54669bd7e70542777a Mon Sep 17 00:00:00 2001
From: Lukas Rusak <lorusak@gmail.com>
Date: Tue, 26 Jan 2021 17:07:20 -0800
Subject: [PATCH] linux: check for config options before building

---
 distributions/LibreELEC/kernel_options | 27 ++++++++++++++++++++++++++
 packages/linux/package.mk              | 18 +++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 distributions/LibreELEC/kernel_options

diff --git a/distributions/LibreELEC/kernel_options b/distributions/LibreELEC/kernel_options
new file mode 100644
index 0000000000..6352f2789b
--- /dev/null
+++ b/distributions/LibreELEC/kernel_options
@@ -0,0 +1,27 @@
+# general
+CONFIG_DRM=y
+CONFIG_SQUASHFS=y
+CONFIG_SQUASHFS_ZSTD=y
+CONFIG_VFAT_FS=y
+CONFIG_EXT4_FS=y
+
+# packages/network/iwd
+CONFIG_CRYPTO_USER_API_HASH=y
+CONFIG_CRYPTO_SHA1=y
+CONFIG_CRYPTO_HMAC=y
+CONFIG_CRYPTO_MD5=y
+CONFIG_CRYPTO_AES=y
+CONFIG_CRYPTO_CMAC=y
+CONFIG_CRYPTO_SHA256=y
+CONFIG_CRYPTO_SHA512=y
+CONFIG_CRYPTO_USER_API_SKCIPHER=y
+CONFIG_CRYPTO_DES=y
+CONFIG_CRYPTO_ECB=y
+CONFIG_CRYPTO_CBC=y
+CONFIG_KEY_DH_OPERATIONS=y
+CONFIG_KEYS=y
+CONFIG_ASYMMETRIC_KEY_TYPE=y
+CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=y
+CONFIG_X509_CERTIFICATE_PARSER=y
+CONFIG_PKCS7_MESSAGE_PARSER=y
+CONFIG_PKCS8_PRIVATE_KEY_PARSER=m
diff --git a/packages/linux/package.mk b/packages/linux/package.mk
index 5ec60bf294..795d504a52 100644
--- a/packages/linux/package.mk
+++ b/packages/linux/package.mk
@@ -177,6 +177,24 @@ pre_make_target() {
   fi
 
   kernel_make oldconfig
+
+  if [ -f "${DISTRO_DIR}/${DISTRO}/kernel_options" ]; then
+    while read OPTION; do
+      [ -z "${OPTION}" -o -n "$(echo "${OPTION}" | grep '^#')" ] && continue
+
+      if [ "${OPTION##*=}" == "n" -a "$(${PKG_BUILD}/scripts/config --state ${OPTION%%=*})" == "undef" ]; then
+        continue
+      fi
+
+      if [ "$($PKG_BUILD/scripts/config --state ${OPTION%%=*})" != "${OPTION##*=}" ]; then
+        MISSING_KERNEL_OPTIONS+="\t${OPTION}\n"
+      fi
+    done < ${DISTRO_DIR}/${DISTRO}/kernel_options
+
+    if [ -n "${MISSING_KERNEL_OPTIONS}" ]; then
+      print_color CLR_WARNING "LINUX: kernel options not correct: \n${MISSING_KERNEL_OPTIONS%%}\nPlease run ./tools/check_kernel_config\n"
+    fi
+  fi
 }
 
 make_target() {