CMake: remove useless cross-compiling related checks (fixes OSGeo#3746)

Author: rouault

cmake/CMakeLists.txt

@@ -82,13 +82,6 @@ else ()
   set (MSVC_TOOLSET_VERSION 0)
   set (MSVC_TOOLSET_MAJOR 0)
 endif ()
-if (CMAKE_CROSSCOMPILING)
-  # Ensure that all "true" (resp. "false") settings are represented by
-  # the same string.
-  set (CMAKE_CROSSCOMPILING_STR "ON")
-else ()
-  set (CMAKE_CROSSCOMPILING_STR "OFF")
-endif ()
 
 # If this is a regular build (PROJECT_SOURCE_DIR == CMAKE_SOURCE_DIR), export legacy files by default
 # Otherwise, this is embedded in another project, only export PROJ target

cmake/project-config-version.cmake.in

@@ -14,13 +14,6 @@ if (MSVC)
   # digit.
   math (EXPR MSVC_TOOLSET_MAJOR "${MSVC_TOOLSET_VERSION}/10")
 endif ()
-if (CMAKE_CROSSCOMPILING)
-  # Ensure that all "true" (resp. "false") settings are represented by
-  # the same string.
-  set (CMAKE_CROSSCOMPILING_STR "ON")
-else ()
-  set (CMAKE_CROSSCOMPILING_STR "OFF")
-endif ()
 
 if (NOT PACKAGE_FIND_NAME STREQUAL "@PROJECT_VARIANT_NAME@")
   # Check package name (in particular, because of the way cmake finds
@@ -43,16 +36,6 @@ elseif (MSVC AND NOT (
   # Reject if there's a mismatch in MSVC compiler versions
   set (REASON "MSVC_TOOLSET_VERSION = @MSVC_TOOLSET_VERSION@")
   set (PACKAGE_VERSION_UNSUITABLE TRUE)
-elseif (NOT CMAKE_CROSSCOMPILING_STR STREQUAL "@CMAKE_CROSSCOMPILING_STR@")
-  # Reject if there's a mismatch in ${CMAKE_CROSSCOMPILING}
-  set (REASON "cross-compiling = @CMAKE_CROSSCOMPILING@")
-  set (PACKAGE_VERSION_UNSUITABLE TRUE)
-elseif (CMAKE_CROSSCOMPILING AND
-    NOT (CMAKE_SYSTEM_NAME STREQUAL "@CMAKE_SYSTEM_NAME@" AND
-      CMAKE_SYSTEM_PROCESSOR STREQUAL "@CMAKE_SYSTEM_PROCESSOR@"))
-  # Reject if cross-compiling and there's a mismatch in the target system
-  set (REASON "target = @CMAKE_SYSTEM_NAME@-@CMAKE_SYSTEM_PROCESSOR@")
-  set (PACKAGE_VERSION_UNSUITABLE TRUE)
 elseif (PACKAGE_FIND_VERSION)
   if (PACKAGE_FIND_VERSION VERSION_EQUAL PACKAGE_VERSION)
     set (PACKAGE_VERSION_EXACT TRUE)