[build] fix when openssl is static build fail

CMakeLists.txt

@@ -172,7 +172,7 @@ option(ENABLE_CODE_COVERAGE "Enable code coverage reporting" OFF)
 option(ENABLE_MONOTONIC_CLOCK "Enforced clock_gettime with monotonic clock on GC CV" ${ENABLE_MONOTONIC_CLOCK_DEFAULT})
 option(ENABLE_STDCXX_SYNC "Use C++11 chrono and threads for timing instead of pthreads" ${ENABLE_STDCXX_SYNC_DEFAULT})
 option(USE_OPENSSL_PC "Use pkg-config to find OpenSSL libraries" ON)
-option(OPENSSL_USE_STATIC_LIBS "Link OpenSSL libraries statically." OFF)
+option(USE_OPENSSL_STATIC_LIBS "Link OpenSSL libraries statically." OFF)
 option(USE_BUSY_WAITING "Enable more accurate sending times at a cost of potentially higher CPU load" OFF)
 option(USE_GNUSTL "Get c++ library/headers from the gnustl.pc" OFF)
 option(ENABLE_SOCK_CLOEXEC "Enable setting SOCK_CLOEXEC on a socket" ON)
@@ -389,7 +389,7 @@ if (ENABLE_ENCRYPTION)
 		# fall back to find_package method otherwise
 		if (USE_OPENSSL_PC)
 			pkg_check_modules(SSL ${SSL_REQUIRED_MODULES})
-			if (OPENSSL_USE_STATIC_LIBS)
+			if (USE_OPENSSL_STATIC_LIBS)
 				# use `pkg-config --static xxx` found libs
 				set(SSL_LIBRARIES ${SSL_STATIC_LIBRARIES})
 			endif()
@@ -1079,7 +1079,7 @@ if (srt_libspec_shared)
 	if (MICROSOFT)
 		target_link_libraries(${TARGET_srt}_shared PRIVATE ws2_32.lib)
 		if (NOT (ENABLE_ENCRYPTION AND "${USE_ENCLIB}" STREQUAL "botan"))
-			if (OPENSSL_USE_STATIC_LIBS)
+			if (USE_OPENSSL_STATIC_LIBS)
 				target_link_libraries(${TARGET_srt}_shared PRIVATE crypt32.lib)
 			else()
 				set_target_properties(${TARGET_srt}_shared PROPERTIES LINK_FLAGS "/DELAYLOAD:libeay32.dll")
@@ -1118,7 +1118,7 @@ if (srt_libspec_static)
 	endif()
 	if (MICROSOFT)
 		target_link_libraries(${TARGET_srt}_static PRIVATE ws2_32.lib)
-		if (OPENSSL_USE_STATIC_LIBS)
+		if (USE_OPENSSL_STATIC_LIBS)
 			target_link_libraries(${TARGET_srt}_static PRIVATE crypt32.lib)
 		endif()
 	elseif (MINGW)
@@ -1132,7 +1132,7 @@ endif()
 target_include_directories(srt_virtual PRIVATE  ${SSL_INCLUDE_DIRS})
 
 if (MICROSOFT)
-	if (OPENSSL_USE_STATIC_LIBS)
+	if (USE_OPENSSL_STATIC_LIBS)
 		set (SRT_LIBS_PRIVATE ${SRT_LIBS_PRIVATE} ws2_32.lib crypt32.lib)
 	else()
 		set (SRT_LIBS_PRIVATE ${SRT_LIBS_PRIVATE} ws2_32.lib)
@@ -1174,7 +1174,7 @@ endif()
 if (srt_libspec_shared)
 	if (MICROSOFT)
 		target_link_libraries(${TARGET_srt}_shared PUBLIC Ws2_32.lib)
-		if (OPENSSL_USE_STATIC_LIBS)
+		if (USE_OPENSSL_STATIC_LIBS)
 			target_link_libraries(${TARGET_srt}_shared PUBLIC crypt32.lib)
 		endif()
 	endif()