diff -ru acarsdec-4.3.1_orig/CMakeLists.txt acarsdec-4.3.1/CMakeLists.txt
--- acarsdec-4.3.1_orig/CMakeLists.txt	2025-07-24 12:02:24.000000000 +0200
+++ acarsdec-4.3.1/CMakeLists.txt	2025-08-21 22:35:29.411210950 +0200
@@ -1,8 +1,6 @@
 cmake_minimum_required (VERSION 3.12)
 project (acarsdec C)
 
-add_compile_options(-Ofast)
-
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
 
 add_executable(acarsdec acars.c  acarsdec.c  label.c  msk.c  output.c netout.c fileout.c lib.c statsd.c)
@@ -14,6 +12,9 @@
 message ( FATAL_ERROR "pkg-config NOT FOUND")
 endif()
 
+option (cjson_enable "Enable cJSON")
+option (mqtt_enable "Enable MQTT")
+if (cjson_enable)
 pkg_check_modules(LIBCJSON libcjson)
 if(LIBCJSON_FOUND)
 add_definitions(-DHAVE_CJSON )
@@ -22,6 +23,7 @@
 target_link_directories(acarsdec PUBLIC ${LIBCJSON_LIBRARY_DIRS})
 
  SET(WITH_MQTT NO)
+ if (mqtt_enable)
  find_library(MQTT paho-mqtt3a)
  if(MQTT)
  add_definitions(-DWITH_MQTT )
@@ -32,10 +34,14 @@
  SET(WITH_MQTT YES)
  endif()
  message ( STATUS "Using paho-mqtt3a: ${WITH_MQTT}")
+ endif()
 
 endif()
+endif()
 
+option(alsa_enable "Enable ALSA")
 SET(WITH_ALSA NO)
+if (libalsa_enable)
 pkg_check_modules(LIBASOUND alsa)
 if(LIBASOUND_FOUND)
 add_definitions(-DWITH_ALSA )
@@ -46,8 +52,11 @@
 SET(WITH_ALSA YES)
 endif()
 message ( STATUS "Using alsa: ${WITH_ALSA}")
+endif()
 
+option(libacars_enable "Enable libacars")
 SET(WITH_LIBACARS NO)
+if (libacars_enable)
 pkg_check_modules(LIBACARS libacars-2>=2.0.0)
 if(LIBACARS_FOUND)
 add_definitions(-DHAVE_LIBACARS )
@@ -57,8 +66,11 @@
 SET(WITH_LIBACARS YES)
 endif()
 message ( STATUS "Using libacars: ${WITH_LIBACARS}")
+endif()
 
+option(libsndfile_enable "Enable libsndfile")
 SET(WITH_SNDFILE NO)
+if (libsndfile_enable)
 find_library(LIBSNDFILE sndfile)
 if(LIBSNDFILE)
 add_definitions(-DWITH_SNDFILE )
@@ -69,8 +81,11 @@
 SET(WITH_SNDFILE YES)
 endif()
 message ( STATUS "Using libsnd: ${WITH_SNDFILE}")
+endif()
 
+option (rtl_enable "Enable RTl-SDR")
 SET(WITH_RTL NO)
+if (rtl_enable)
 find_library(LIBRTL rtlsdr)
 if(LIBRTL)
 add_definitions(-DWITH_RTL )
@@ -79,8 +94,11 @@
 SET(WITH_RTL YES)
 endif()
 message ( STATUS "Using librtlsdr: ${WITH_RTL}")
+endif()
 
+option (airspy_enable "Enable Airspy")
 SET(WITH_AIR NO)
+if (airspy_enable)
 find_library(LIBAIR airspy)
 if(LIBAIR)
 add_definitions(-DWITH_AIR )
@@ -89,8 +107,11 @@
 SET(WITH_AIR YES)
 endif()
 message ( STATUS "Using libairspy: ${WITH_AIR}")
+endif()
 
+option (sdrplay_enable "Enable sdrplay")
 SET(WITH_SDRPLAY NO)
+if (sdrplay_enable)
 find_library(LIBPLAY mirsdrapi-rsp)
 if(LIBPLAY)
 add_definitions(-DWITH_SDRPLAY )
@@ -99,8 +120,11 @@
 SET(WITH_SDRPLAY YES)
 endif()
 message ( STATUS "Using libmirsdrapi-rsp: ${WITH_SDRPLAY}")
+endif()
 
+option (soapy_enable "Enable SoapySDR")
 SET(WITH_SOAPY NO)
+if (soapy_enable)
 find_library(LIBSOAPY SoapySDR)
 if(LIBSOAPY)
 add_definitions(-DWITH_SOAPY )
@@ -109,6 +133,7 @@
 SET(WITH_SOAPY YES)
 endif()
 message ( STATUS "Using libSoapySDR: ${WITH_SOAPY}")
+endif()
 
 target_link_libraries( acarsdec pthread m )