--- CMakeLists.txt.orig	2020-08-03 13:43:47 UTC
+++ CMakeLists.txt
@@ -13,8 +13,8 @@ if(NOT CMAKE_BUILD_TYPE)
     FORCE)
 endif()
 
-option(ICINGA2_WITH_MYSQL "Build the MySQL IDO module" ON)
-option(ICINGA2_WITH_PGSQL "Build the PostgreSQL IDO module" ON)
+option(ICINGA2_WITH_MYSQL "Build the MySQL IDO module" OFF)
+option(ICINGA2_WITH_PGSQL "Build the PostgreSQL IDO module" OFF)
 option(ICINGA2_WITH_CHECKER "Build the checker module" ON)
 option(ICINGA2_WITH_COMPAT "Build the compat module" ON)
 option(ICINGA2_WITH_LIVESTATUS "Build the Livestatus module" ON)
@@ -260,6 +260,12 @@ if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -pthread")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -pthread")
   endif()
+endif()
+
+if(CMAKE_SYSTEM_NAME MATCHES "FreeBSD.*")
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -lexecinfo")
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -lexecinfo")
+    set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} -lexecinfo")
 endif()
 
 include(CheckCXXCompilerFlag)