Teach find_library and find_package to search lib32 paths (#11260)

Add a ``FIND_LIBRARY_USE_LIB32_PATHS`` global property analogous to the
``FIND_LIBRARY_USE_LIB64_PATHS`` property.  This helps find commands on
multilib systems that use ``lib32`` directories and either do not have
``lib`` symlinks or point ``lib`` to ``lib64``.

15 files changed, 47 insertions, 18 deletions

diff --git a/Tests/CMakeOnly/find_library/CMakeLists.txt b/Tests/CMakeOnly/find_library/CMakeLists.txt
index 2d4ecaf..9958650 100644
--- a/Tests/CMakeOnly/find_library/CMakeLists.txt
+++ b/Tests/CMakeOnly/find_library/CMakeLists.txt
@@ -33,16 +33,23 @@ endmacro()
 
 set(CMAKE_FIND_LIBRARY_PREFIXES "lib")
 set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
+set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS TRUE)
 set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS TRUE)
 
 set(CMAKE_SIZEOF_VOID_P 4)
 foreach(lib
+    lib/32/libtest5.a
     lib/A/lib/libtest1.a
+    lib/A/lib32/libtest3.a
     lib/A/libtest1.a
     lib/libtest1.a
     lib/libtest2.a
     lib/libtest3.a
     lib/libtest3.a
+    lib32/A/lib/libtest2.a
+    lib32/A/lib32/libtest4.a
+    lib32/A/libtest4.a
+    lib32/libtest4.a
     )
   test_find_library_subst(${lib})
 endforeach()
diff --git a/Tests/CMakeOnly/find_library/lib/32/libtest5.a b/Tests/CMakeOnly/find_library/lib/32/libtest5.a
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/Tests/CMakeOnly/find_library/lib/32/libtest5.a
diff --git a/Tests/CMakeOnly/find_library/lib/A/lib32/libtest3.a b/Tests/CMakeOnly/find_library/lib/A/lib32/libtest3.a
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/Tests/CMakeOnly/find_library/lib/A/lib32/libtest3.a
diff --git a/Tests/CMakeOnly/find_library/lib32/A/lib/libtest2.a b/Tests/CMakeOnly/find_library/lib32/A/lib/libtest2.a
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/Tests/CMakeOnly/find_library/lib32/A/lib/libtest2.a
diff --git a/Tests/CMakeOnly/find_library/lib32/A/lib32/libtest4.a b/Tests/CMakeOnly/find_library/lib32/A/lib32/libtest4.a
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/Tests/CMakeOnly/find_library/lib32/A/lib32/libtest4.a
diff --git a/Tests/CMakeOnly/find_library/lib32/A/libtest4.a b/Tests/CMakeOnly/find_library/lib32/A/libtest4.a
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/Tests/CMakeOnly/find_library/lib32/A/libtest4.a
diff --git a/Tests/CMakeOnly/find_library/lib32/libtest4.a b/Tests/CMakeOnly/find_library/lib32/libtest4.a
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/Tests/CMakeOnly/find_library/lib32/libtest4.a
diff --git a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_CMAKE_APPBUNDLE_PATH.cmake b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_CMAKE_APPBUNDLE_PATH.cmake
index 9d4826f..4a41533 100644
--- a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_CMAKE_APPBUNDLE_PATH.cmake
+++ b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_CMAKE_APPBUNDLE_PATH.cmake
@@ -1,4 +1,4 @@
-# Needed for CMAKE_SYSTEM_NAME, CMAKE_LIBRARY_ARCHITECTURE and FIND_LIBRARY_USE_LIB64_PATHS
+# Needed for CMAKE_SYSTEM_NAME, CMAKE_LIBRARY_ARCHITECTURE, FIND_LIBRARY_USE_LIB32_PATHS and FIND_LIBRARY_USE_LIB64_PATHS
 enable_language(C)
 
 # Prepare environment and variables
@@ -29,10 +29,15 @@ if(NOT DEFINED CMAKE_SYSTEM_NAME
       set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
     endif()
   else()
-    # not debian, chech the FIND_LIBRARY_USE_LIB64_PATHS property
+    # not debian, check the FIND_LIBRARY_USE_LIB32_PATHS and FIND_LIBRARY_USE_LIB64_PATHS properties
+    get_property(uselib32 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS)
     get_property(uselib64 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS)
-    if(uselib64)
+    if(uselib32 AND CMAKE_SIZEOF_VOID_P EQUAL 4)
+      set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib32/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib32/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
+    elseif(uselib64 AND CMAKE_SIZEOF_VOID_P EQUAL 8)
       set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib64/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib64/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
+    else()
+      set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
     endif()
   endif()
 else()
diff --git a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_CMAKE_FRAMEWORK_PATH.cmake b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_CMAKE_FRAMEWORK_PATH.cmake
index d9943d4..b66d02f 100644
--- a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_CMAKE_FRAMEWORK_PATH.cmake
+++ b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_CMAKE_FRAMEWORK_PATH.cmake
@@ -1,4 +1,4 @@
-# Needed for CMAKE_SYSTEM_NAME, CMAKE_LIBRARY_ARCHITECTURE and FIND_LIBRARY_USE_LIB64_PATHS
+# Needed for CMAKE_SYSTEM_NAME, CMAKE_LIBRARY_ARCHITECTURE, FIND_LIBRARY_USE_LIB32_PATHS and FIND_LIBRARY_USE_LIB64_PATHS
 enable_language(C)
 
 # Prepare environment and variables
@@ -29,10 +29,15 @@ if(NOT DEFINED CMAKE_SYSTEM_NAME
       set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
     endif()
   else()
-    # not debian, chech the FIND_LIBRARY_USE_LIB64_PATHS property
+    # not debian, check the FIND_LIBRARY_USE_LIB64_PATHS and FIND_LIBRARY_USE_LIB64_PATHS properties
+    get_property(uselib32 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS)
     get_property(uselib64 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS)
-    if(uselib64)
+    if(uselib32 AND CMAKE_SIZEOF_VOID_P EQUAL 4)
+      set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib32/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib32/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
+    elseif(uselib64 AND CMAKE_SIZEOF_VOID_P EQUAL 8)
       set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib64/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib64/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
+    else()
+      set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
     endif()
   endif()
 else()
diff --git a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_NO_PKGCONFIG_PATH.cmake b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_NO_PKGCONFIG_PATH.cmake
index 89ce4c6..25a775d 100644
--- a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_NO_PKGCONFIG_PATH.cmake
+++ b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_NO_PKGCONFIG_PATH.cmake
@@ -1,6 +1,3 @@
-# Needed for CMAKE_SYSTEM_NAME, CMAKE_LIBRARY_ARCHITECTURE and FIND_LIBRARY_USE_LIB64_PATHS
-enable_language(C)
-
 # Prepare environment and variables
 set(PKG_CONFIG_USE_CMAKE_PREFIX_PATH FALSE)
 set(CMAKE_PREFIX_PATH "${CMAKE_CURRENT_SOURCE_DIR}/pc-foo")
diff --git a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH.cmake b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH.cmake
index c903279..bdecb8a 100644
--- a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH.cmake
+++ b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH.cmake
@@ -1,4 +1,4 @@
-# Needed for CMAKE_SYSTEM_NAME, CMAKE_LIBRARY_ARCHITECTURE and FIND_LIBRARY_USE_LIB64_PATHS
+# Needed for CMAKE_SYSTEM_NAME, CMAKE_LIBRARY_ARCHITECTURE, FIND_LIBRARY_USE_LIB32_PATHS and FIND_LIBRARY_USE_LIB64_PATHS
 enable_language(C)
 
 # Prepare environment and variables
@@ -29,10 +29,15 @@ if(NOT DEFINED CMAKE_SYSTEM_NAME
       set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
     endif()
   else()
-    # not debian, chech the FIND_LIBRARY_USE_LIB64_PATHS property
+    # not debian, check the FIND_LIBRARY_USE_LIB32_PATHS and FIND_LIBRARY_USE_LIB64_PATHS propertie
+    get_property(uselib32 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS)
     get_property(uselib64 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS)
-    if(uselib64)
+    if(uselib32 AND CMAKE_SIZEOF_VOID_P EQUAL 4)
+      set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib32/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib32/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
+    elseif(uselib64 AND CMAKE_SIZEOF_VOID_P EQUAL 8)
       set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib64/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib64/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
+    else()
+      set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
     endif()
   endif()
 else()
diff --git a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH_NO_CMAKE_ENVIRONMENT_PATH.cmake b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH_NO_CMAKE_ENVIRONMENT_PATH.cmake
index a52bcbf..df67235 100644
--- a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH_NO_CMAKE_ENVIRONMENT_PATH.cmake
+++ b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH_NO_CMAKE_ENVIRONMENT_PATH.cmake
@@ -1,4 +1,4 @@
-# Needed for CMAKE_SYSTEM_NAME, CMAKE_LIBRARY_ARCHITECTURE and FIND_LIBRARY_USE_LIB64_PATHS
+# Needed for CMAKE_SYSTEM_NAME, CMAKE_LIBRARY_ARCHITECTURE, FIND_LIBRARY_USE_LIB32_PATHS and FIND_LIBRARY_USE_LIB64_PATHS
 enable_language(C)
 
 # Prepare environment and variables
@@ -29,10 +29,15 @@ if(NOT DEFINED CMAKE_SYSTEM_NAME
       set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig")
     endif()
   else()
-    # not debian, chech the FIND_LIBRARY_USE_LIB64_PATHS property
+    # not debian, check the FIND_LIBRARY_USE_LIB32_PATHS and FIND_LIBRARY_USE_LIB64_PATHS properties
+    get_property(uselib32 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS)
     get_property(uselib64 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS)
-    if(uselib64)
+    if(uselib32 AND CMAKE_SIZEOF_VOID_P EQUAL 4)
+      set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib32/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig")
+    elseif(uselib64 AND CMAKE_SIZEOF_VOID_P EQUAL 8)
       set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib64/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig")
+    else()
+      set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-foo/lib/pkgconfig")
     endif()
   endif()
 else()
diff --git a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH_NO_CMAKE_PATH.cmake b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH_NO_CMAKE_PATH.cmake
index 2fabe5b..1351b6f 100644
--- a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH_NO_CMAKE_PATH.cmake
+++ b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_PKGCONFIG_PATH_NO_CMAKE_PATH.cmake
@@ -1,4 +1,4 @@
-# Needed for CMAKE_SYSTEM_NAME, CMAKE_LIBRARY_ARCHITECTURE and FIND_LIBRARY_USE_LIB64_PATHS
+# Needed for CMAKE_SYSTEM_NAME, CMAKE_LIBRARY_ARCHITECTURE, FIND_LIBRARY_USE_LIB32_PATHS and FIND_LIBRARY_USE_LIB64_PATHS
 enable_language(C)
 
 # Prepare environment and variables
@@ -29,10 +29,15 @@ if(NOT DEFINED CMAKE_SYSTEM_NAME
       set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
     endif()
   else()
-    # not debian, chech the FIND_LIBRARY_USE_LIB64_PATHS property
+    # not debian, check the FIND_LIBRARY_USE_LIB64_PATHS and FIND_LIBRARY_USE_LIB32_PATHS properties
+    get_property(uselib32 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS)
     get_property(uselib64 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS)
-    if(uselib64)
+    if(uselib32 AND CMAKE_SIZEOF_VOID_P EQUAL 4)
+      set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib32/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
+    elseif(uselib64 AND CMAKE_SIZEOF_VOID_P EQUAL 8)
       set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib64/pkgconfig:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
+    else()
+      set(expected_path "/baz:${CMAKE_CURRENT_SOURCE_DIR}/pc-bar/lib/pkgconfig")
     endif()
   endif()
 else()
diff --git a/Tests/RunCMake/FindPkgConfig/pc-bar/lib32/pkgconfig/.placeholder b/Tests/RunCMake/FindPkgConfig/pc-bar/lib32/pkgconfig/.placeholder
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/Tests/RunCMake/FindPkgConfig/pc-bar/lib32/pkgconfig/.placeholder
diff --git a/Tests/RunCMake/FindPkgConfig/pc-foo/lib32/pkgconfig/.placeholder b/Tests/RunCMake/FindPkgConfig/pc-foo/lib32/pkgconfig/.placeholder
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/Tests/RunCMake/FindPkgConfig/pc-foo/lib32/pkgconfig/.placeholder