Set overriding user provided prefix to be off by default

It is surprising to override standard input variables. This requires the
user to actively opt-in to overriding the standard CMake behavior.

libtiledbsoma/CMakeLists.txt

@@ -68,7 +68,7 @@ option(TILEDB_WERROR "Enables the -Werror flag during compilation." OFF)
 option(TILEDB_REMOVE_DEPRECATIONS "If true, do not build deprecated APIs." OFF)
 option(TILEDB_SERIALIZATION "If true, enables building with support for query serialization" ON)
 option(TILEDB_VERBOSE "If true, sets default logging to verbose for TileDB" OFF)
-option(OVERRIDE_INSTALL_PREFIX "Ignores the setting of CMAKE_INSTALL_PREFIX and sets a default prefix" ON)
+option(OVERRIDE_INSTALL_PREFIX "Ignores the setting of CMAKE_INSTALL_PREFIX and sets a default prefix" OFF)
 option(ENABLE_ARROW_EXPORT "Installs an extra header for exporting in-memory results with Apache Arrow" ON)
 option(TILEDB_LOG_OUTPUT_ON_FAILURE "If true, print error logs if dependency sub-project build fails" ON)
 option(TILEDB_SANITIZER "Sanitizer to use in TILEDB. ")
@@ -122,7 +122,7 @@ endif()
 #set(CMAKE_CXX_VISIBILITY_PRESET hidden)
 
 # Root directory default installation prefix
-if(OVERRIDE_INSTALL_PREFIX)
+if(OVERRIDE_INSTALL_PREFIX OR NOT CMAKE_INSTALL_PREFIX)
   set(PREFIX_REL_PATH "${CMAKE_SOURCE_DIR}/../dist")
   get_filename_component(DEFAULT_PREFIX "${PREFIX_REL_PATH}" ABSOLUTE)
   set(CMAKE_INSTALL_PREFIX "${DEFAULT_PREFIX}" CACHE PATH "Default install prefix" FORCE)

scripts/bld

@@ -78,6 +78,8 @@ fi
 # set installation path
 if [ -n "${prefix}"  ]; then
   extra_opts+=" -DCMAKE_INSTALL_PREFIX=${prefix} -DOVERRIDE_INSTALL_PREFIX=OFF"
+else
+  extra_opts+=" -DOVERRIDE_INSTALL_PREFIX=ON"
 fi
 
 # build with custom tiledb

scripts/bld.ps1

@@ -47,6 +47,8 @@ if ($Configuration -eq 'Debug' -and $TileDBLocation -ne '') {
 
 if ($Prefix -ne '') {
     $ExtraOpts += " -DCMAKE_INSTALL_PREFIX=$Prefix -DOVERRIDE_INSTALL_PREFIX=OFF"
+} else {
+    $ExtraOpts += " -DOVERRIDE_INSTALL_PREFIX=ON"
 }
 
 if ($TileDBLocation -ne '') {