add cmake example tie in

cmake/CMakeLists.txt

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+CMAKE_MINIMUM_REQUIRED(VERSION 3.16)
+project(wolfssl-example)
+
+message("Example cmake project including wolfSSL and using user_settings.h")
+
+# add global define to include user_settings.h
+add_compile_definitions(WOLFSSL_USER_SETTINGS)
+
+set(BUILD_SHARED_LIBS OFF)
+set(WOLFSSL_EXAMPLES OFF)
+set(WOLFSSL_CRYPT_TESTS OFF)
+set(WOLFSSL_USER_SETTINGS ON)
+
+if (CONFIG_BIG_ENDIAN)
+    set(CMAKE_C_BYTE_ORDER    BIG_ENDIAN)
+    set(CMAKE_CXX_BYTE_OREDER BIG_ENDIAN)
+else ()
+    set(CMAKE_C_BYTE_ORDER    LITTLE_ENDIAN)
+    set(CMAKE_CXX_BYTE_OREDER LITTLE_ENDIAN)
+endif()
+
+include_directories(include)
+add_subdirectory(wolfssl)
+
+target_link_libraries(wolfssl PRIVATE
+)
+
+# add in our application
+add_executable(hash myApp.c)
+target_link_libraries(hash wolfssl)
+

cmake/README.md

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+This is an example of adding the wolfSSL library as a subdirectory to a project
+and using cmake to build.
+
+## Steps to build:
+
+\# clone or download the wolfssl bundle and put it in the subdirectory wolfssl
+git clone https://github.com/wolfssl/wolfssl
+mkdir build
+cd build
+cmake .. -DCMAKE_C_FLAGS=-I../include/
+make
+./hash example_string

cmake/include/user_settings.h

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+#ifndef _USER_SETTINGS_INCLUDE
+#define _USER_SETTINGS_INCLUDE
+
+#define ECC_TIMING_RESISTANT
+#define WC_RSA_BLINDING
+
+//add your target specific defines here
+
+#endif

cmake/myApp.c

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+/* myApp.c
+ *
+ * Copyright (C) 2006-2022 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL.
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
+ */
+
+#include <wolfssl/wolfcrypt/settings.h> /* using user_settings.h for example */
+#include <wolfssl/wolfcrypt/sha256.h>
+#include <wolfssl/wolfcrypt/wc_port.h>
+#include <stdio.h>
+
+
+int main(int argc, char** argv)
+{
+    wc_Sha256 sha;
+    byte digest[WC_SHA256_DIGEST_SIZE];
+    int i, ret;
+
+    if (argc != 2) {
+        printf("%s <to be hashed>\n", argv[0]);
+        return -1;
+    }
+
+    ret = wolfCrypt_Init();
+    if (ret == 0) {
+        ret = wc_InitSha256(&sha);
+    }
+    if (ret == 0) {
+        ret = wc_Sha256Update(&sha, (const byte*)argv[1],
+            (word32)XSTRLEN(argv[1]));
+    }
+    if (ret == 0) {
+        ret = wc_Sha256Final(&sha, digest);
+    }
+
+    if (ret != 0) {
+        printf("Error %d\n", ret);
+    }
+
+    if (ret == 0) {
+        printf("Hash in hex : ");
+        for (i = 0; i < WC_SHA256_DIGEST_SIZE; i++) {
+            printf("%02X", digest[i]);
+        }
+        printf("\n");
+    }
+
+    wolfCrypt_Cleanup();
+    return 0;
+}