diff --git a/CMakeLists.txt b/CMakeLists.txt
index 04790815..e320fafc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -226,7 +226,12 @@ endif()
 message("CMAKE_SYSTEM_NAME: ${CMAKE_SYSTEM_NAME}")    
 if(CMAKE_SYSTEM_NAME STREQUAL "iOS")
   set(CMAKE_OSX_DEPLOYMENT_TARGET 12.00)
-  set(Boost_LIBRARIES "libboost.a")
+  if(NOT DEFINED SKIP_BOOST_FATLIB_LIB OR NOT SKIP_BOOST_FATLIB_LIB)
+	message("Ios: libboost.a included as library")    
+	set(Boost_LIBRARIES "libboost.a")
+  else()
+	message("Ios: libboost.a not included as library")    
+  endif()
   #workaround for new XCode 12 policy for builds(now it includes a slice for the "arm64" when builds for simulator)
   set(__iphoneos_archs "arm64")
   #set(__iphonesimulator_archs "arm64,x86_64")
diff --git a/src/crypto/random.c b/src/crypto/random.c
index bdac1e7a..a54bdf74 100644
--- a/src/crypto/random.c
+++ b/src/crypto/random.c
@@ -43,7 +43,7 @@ void generate_system_random_bytes(size_t n, void *result) {
 void generate_system_random_bytes(size_t n, void *result) {
   int fd;
   if ((fd = open("/dev/urandom", O_RDONLY | O_NOCTTY | O_CLOEXEC)) < 0) {
-    err(EXIT_FAILURE, "open /dev/urandom");
+    exit(EXIT_FAILURE);
   }
   for (;;) {
     ssize_t res = read(fd, result, n);
@@ -52,17 +52,17 @@ void generate_system_random_bytes(size_t n, void *result) {
     }
     if (res < 0) {
       if (errno != EINTR) {
-        err(EXIT_FAILURE, "read /dev/urandom");
+        exit(EXIT_FAILURE);
       }
     } else if (res == 0) {
-      errx(EXIT_FAILURE, "read /dev/urandom: end of file");
+      exit(EXIT_FAILURE);
     } else {
       result = padd(result, (size_t) res);
       n -= (size_t) res;
     }
   }
   if (close(fd) < 0) {
-    err(EXIT_FAILURE, "close /dev/urandom");
+    exit(EXIT_FAILURE);
   }
 }