CMake: Bump version 3.18

Author: jschueller

CMakeLists.txt

@@ -12,7 +12,7 @@
 # Benoit Scherrer, 2010 CRL, Harvard Medical School
 # Copyright (c) 2008-2009 Children's Hospital Boston
 #==============================================================================
-cmake_minimum_required (VERSION 3.15)
+cmake_minimum_required (VERSION 3.18)
 
 set (CMAKE_BUILD_TYPE Release CACHE STRING "Build type")
 
@@ -324,16 +324,12 @@ if (UNIX)
 endif ()
 
 if (NLOPT_PYTHON)
-  if (CMAKE_VERSION VERSION_LESS 3.18)
-    find_package (Python 3.6 COMPONENTS Interpreter Development NumPy)
+  option (NLOPT_PYTHON_SABI "Use Python stable ABI" OFF)
+  if (NLOPT_PYTHON_SABI AND CMAKE_VERSION VERSION_GREATER_EQUAL 3.26)
+    find_package (Python 3.6 COMPONENTS Interpreter Development.SABIModule NumPy)
+    add_library (Python::Module ALIAS Python::SABIModule)
   else ()
-    option (NLOPT_PYTHON_SABI "Use Python stable ABI" OFF)
-    if (NLOPT_PYTHON_SABI AND CMAKE_VERSION VERSION_GREATER_EQUAL 3.26)
-      find_package (Python 3.6 COMPONENTS Interpreter Development.SABIModule NumPy)
-      add_library (Python::Module ALIAS Python::SABIModule)
-    else ()
-      find_package (Python 3.6 COMPONENTS Interpreter Development.Module NumPy)
-    endif ()
+    find_package (Python 3.6 COMPONENTS Interpreter Development.Module NumPy)
   endif ()
 endif ()
 

src/octave/CMakeLists.txt

@@ -6,13 +6,6 @@ if (Matlab_FOUND AND Matlab_MX_LIBRARY)
   matlab_add_mex (NAME nlopt_optimize-mex SRC nlopt_optimize-mex.c OUTPUT_NAME nlopt_optimize LINK_TO ${nlopt_lib})
   target_include_directories (nlopt_optimize-mex PRIVATE ${PROJECT_SOURCE_DIR}/src/api)
 
-  if (CMAKE_VERSION VERSION_LESS 3.14.0)
-    if (CMAKE_CXX_COMPILER_ID MATCHES "Clang|GNU")
-      message("Forcing mexFunction visibility to default")
-      set_target_properties(nlopt_optimize-mex PROPERTIES COMPILE_FLAGS "-fvisibility=default")
-    endif()
-  endif()
-
   if (NLOPT_CXX)
     set_target_properties (nlopt_optimize-mex PROPERTIES LINKER_LANGUAGE CXX)
   endif ()