initial buildroot for linux 5.15

package/cryptopp/cryptopp.hash

@@ -0,0 +1,5 @@
+# Hash from: https://www.cryptopp.com/release860.html:
+sha512  e7773f5e4a7dc7e8e735b1702524bee56ba38e5211544c9c9778bc51ed8dc7b376c17f2e406410043b636312336f26f76dc963f298872f8c13933e88c232fc03  cryptopp860.zip
+
+# Hash for license file:
+sha256  e668af8c73a38a66a1e8951d14ec24e7582fee5254dd6c3dae488a416d105d5f  License.txt

package/cryptopp/cryptopp.mk

@@ -0,0 +1,39 @@
+################################################################################
+#
+# cryptopp
+#
+################################################################################
+
+CRYPTOPP_VERSION = 8.6.0
+CRYPTOPP_SOURCE = cryptopp$(subst .,,$(CRYPTOPP_VERSION)).zip
+CRYPTOPP_SITE = https://cryptopp.com
+CRYPTOPP_LICENSE = BSL-1.0, BSD-3-Clause (CRYPTOGAMS), Public domain (ChaCha SSE2 and AVX)
+CRYPTOPP_LICENSE_FILES = License.txt
+CRYPTOPP_CPE_ID_VENDOR = cryptopp
+CRYPTOPP_CPE_ID_PRODUCT = crypto\+\+
+CRYPTOPP_INSTALL_STAGING = YES
+
+define HOST_CRYPTOPP_EXTRACT_CMDS
+	$(UNZIP) $(HOST_CRYPTOPP_DL_DIR)/$(CRYPTOPP_SOURCE) -d $(@D)
+endef
+
+HOST_CRYPTOPP_CXXFLAGS = $(HOST_CFLAGS) -fPIC
+
+# _mm256_broadcastsi128_si256 has been added only in gcc 4.9
+ifneq ($(BR2_HOST_GCC_AT_LEAST_4_9),y)
+HOST_CRYPTOPP_CXXFLAGS += -DCRYPTOPP_DISABLE_AVX2
+endif
+
+HOST_CRYPTOPP_MAKE_OPTS = \
+	$(HOST_CONFIGURE_OPTS) \
+	CXXFLAGS="$(HOST_CRYPTOPP_CXXFLAGS)"
+
+define HOST_CRYPTOPP_BUILD_CMDS
+	$(HOST_MAKE_ENV) $(MAKE) -C $(@D) $(HOST_CRYPTOPP_MAKE_OPTS) shared
+endef
+
+define HOST_CRYPTOPP_INSTALL_CMDS
+	$(HOST_MAKE_ENV) $(MAKE) -C $(@D) PREFIX=$(HOST_DIR) install-lib
+endef
+
+$(eval $(host-generic-package))