initial buildroot for linux 5.15

package/mongoose/Config.in

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+config BR2_PACKAGE_MONGOOSE
+	bool "mongoose"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_MMU # fork()
+	help
+	  Mongoose is an embedded networking library, which can turn
+	  anything into a web server
+
+	  https://github.com/cesanta/mongoose
+
+comment "mongoose needs a toolchain w/ threads"
+	depends on BR2_USE_MMU
+	depends on !BR2_TOOLCHAIN_HAS_THREADS

package/mongoose/mongoose.hash

@@ -0,0 +1,3 @@
+# Locally computed:
+sha256  8c5024a4e5b5a0c7fdae3c24ebc68e2b3ccfaba08cf25c2e76fc7f14f92fd4a5  mongoose-7.2.tar.gz
+sha256  9553d057f2ba980642f2c18d87ed38896cff1c9612d77d684a73a11fe1443b05  LICENSE

package/mongoose/mongoose.mk

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+################################################################################
+#
+# mongoose
+#
+################################################################################
+
+MONGOOSE_VERSION = 7.2
+MONGOOSE_SITE = $(call github,cesanta,mongoose,$(MONGOOSE_VERSION))
+MONGOOSE_LICENSE = GPL-2.0
+MONGOOSE_LICENSE_FILES = LICENSE
+MONGOOSE_CPE_ID_VENDOR = cesenta
+MONGOOSE_INSTALL_STAGING = YES
+# static library
+MONGOOSE_INSTALL_TARGET = NO
+
+MONGOOSE_CFLAGS = $(TARGET_CFLAGS)
+
+ifeq ($(BR2_PACKAGE_OPENSSL),y)
+MONGOOSE_DEPENDENCIES += openssl
+MONGOOSE_CFLAGS += -DMG_ENABLE_OPENSSL=1
+else ifeq ($(BR2_PACKAGE_MBEDTLS),y)
+MONGOOSE_DEPENDENCIES += mbedtls
+MONGOOSE_CFLAGS += -DMG_ENABLE_MBEDTLS=1
+endif
+
+define MONGOOSE_BUILD_CMDS
+	$(TARGET_MAKE_ENV) $(TARGET_CC) -c $(@D)/mongoose.c $(MONGOOSE_CFLAGS) -o $(@D)/mongoose.o
+	$(TARGET_MAKE_ENV) $(TARGET_AR) rcs $(@D)/libmongoose.a $(@D)/mongoose.o
+endef
+
+define MONGOOSE_INSTALL_STAGING_CMDS
+	$(INSTALL) -D -m 644 $(@D)/libmongoose.a \
+		$(STAGING_DIR)/usr/lib/libmongoose.a
+	$(INSTALL) -D -m 644 $(@D)/mongoose.h \
+		$(STAGING_DIR)/usr/include/mongoose.h
+endef
+
+$(eval $(generic-package))