Merge topic 'HandleEmptySIZEOF_VOID_P'

14b213c add test for #13241: empty SIZEOF_VOIDP in write_basic_package_version_file
00ae36f write_basic_package_version_file() now works with unset CMAKE_SIZEOF_VOID_P

Modules/BasicConfigVersion-AnyNewerVersion.cmake.in

@@ -18,6 +18,11 @@ else()
   endif()
 endif()
 
+# if the installed or the using project don't have CMAKE_SIZEOF_VOID_P set, ignore it:
+if("${CMAKE_SIZEOF_VOID_P}"  STREQUAL ""  OR "@CMAKE_SIZEOF_VOID_P@" STREQUAL "")
+   return()
+endif()
+
 # check that the installed version has the same 32/64bit-ness as the one which is currently searching:
 if(NOT "${CMAKE_SIZEOF_VOID_P}"  STREQUAL  "@CMAKE_SIZEOF_VOID_P@")
    math(EXPR installedBits "@CMAKE_SIZEOF_VOID_P@ * 8")

Modules/BasicConfigVersion-ExactVersion.cmake.in

@@ -34,6 +34,11 @@ if( "${PACKAGE_FIND_VERSION}" STREQUAL "${PACKAGE_VERSION}")
 endif()
 
 
+# if the installed or the using project don't have CMAKE_SIZEOF_VOID_P set, ignore it:
+if("${CMAKE_SIZEOF_VOID_P}"  STREQUAL ""  OR "@CMAKE_SIZEOF_VOID_P@" STREQUAL "")
+   return()
+endif()
+
 # check that the installed version has the same 32/64bit-ness as the one which is currently searching:
 if(NOT "${CMAKE_SIZEOF_VOID_P}" STREQUAL "@CMAKE_SIZEOF_VOID_P@")
   math(EXPR installedBits "@CMAKE_SIZEOF_VOID_P@ * 8")

Modules/BasicConfigVersion-SameMajorVersion.cmake.in

@@ -33,6 +33,11 @@ else()
 endif()
 
 
+# if the installed or the using project don't have CMAKE_SIZEOF_VOID_P set, ignore it:
+if("${CMAKE_SIZEOF_VOID_P}"  STREQUAL ""  OR "@CMAKE_SIZEOF_VOID_P@" STREQUAL "")
+   return()
+endif()
+
 # check that the installed version has the same 32/64bit-ness as the one which is currently searching:
 if(NOT "${CMAKE_SIZEOF_VOID_P}" STREQUAL "@CMAKE_SIZEOF_VOID_P@")
   math(EXPR installedBits "@CMAKE_SIZEOF_VOID_P@ * 8")

Tests/FindPackageTest/CMakeLists.txt

@@ -363,10 +363,16 @@ endif()
 #-----------------------------------------------------------------------------
 # Test write_basic_config_version_file().
 
+# also test that an empty CMAKE_SIZEOF_VOID_P is accepted:
+set(_CMAKE_SIZEOF_VOID_P ${CMAKE_SIZEOF_VOID_P})
+set(CMAKE_SIZEOF_VOID_P "")
+
 write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/Foo123ConfigVersion.cmake
                                  VERSION 1.2.3
                                  COMPATIBILITY AnyNewerVersion)
 
+set(CMAKE_SIZEOF_VOID_P ${_CMAKE_SIZEOF_VOID_P})
+
 set(PACKAGE_FIND_VERSION 2.3.4)
 include(${CMAKE_CURRENT_BINARY_DIR}/Foo123ConfigVersion.cmake)
 if(PACKAGE_VERSION_COMPATIBLE)
@@ -379,6 +385,10 @@ if(NOT PACKAGE_VERSION_COMPATIBLE)
   message(SEND_ERROR "Did not find Foo123 with version 1.2.3 (0.0.1 was requested) !")
 endif()
 
+if(PACKAGE_VERSION_UNSUITABLE)
+  message(SEND_ERROR "PACKAGE_VERSION_UNSUITABLE set, but must not be !")
+endif()
+
 set(PACKAGE_FIND_VERSION 1.0.0)
 include(${CMAKE_CURRENT_BINARY_DIR}/Foo123ConfigVersion.cmake)
 if(NOT PACKAGE_VERSION_COMPATIBLE)
@@ -405,6 +415,7 @@ write_basic_config_version_file(${CMAKE_CURRENT_BINARY_DIR}/Boo123ConfigVersion.
                                 VERSION 1.2.3
                                 COMPATIBILITY SameMajorVersion)
 
+unset(PACKAGE_VERSION_UNSUITABLE)
 set(PACKAGE_VERSION_EXACT FALSE)
 set(PACKAGE_FIND_VERSION 2.3.4)
 set(PACKAGE_FIND_VERSION_MAJOR 2)
@@ -456,6 +467,7 @@ write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/Bar123ConfigVersion
                                  VERSION 1.2.3.17
                                  COMPATIBILITY ExactVersion)
 
+unset(PACKAGE_VERSION_UNSUITABLE)
 set(PACKAGE_VERSION_EXACT FALSE)
 set(PACKAGE_FIND_VERSION 2.3.4)
 include(${CMAKE_CURRENT_BINARY_DIR}/Bar123ConfigVersion.cmake)