ENH: Test target_link_libraries INTERFACE option

Tests/ExportImport/Export/CMakeLists.txt

@@ -35,6 +35,22 @@ set_property(TARGET testLib3 PROPERTY SOVERSION 3)
 add_library(testLib4 SHARED testLib4.c)
 set_property(TARGET testLib4 PROPERTY FRAMEWORK 1)
 
+# Test using the target_link_libraries command to set the
+# LINK_INTERFACE_LIBRARIES* properties.  We construct two libraries
+# providing the same two symbols.  In each library one of the symbols
+# will work and the other one will fail to link.  The import part of
+# this test will try to use the symbol corresponding to the
+# configuration in which it is built.  If the proper library is not
+# used via the link interface the import test will fail to link.
+add_library(testLib4lib STATIC testLib4lib.c)
+add_library(testLib4libdbg STATIC testLib4libopt.c testLib4libdbg.c)
+add_library(testLib4libopt STATIC testLib4libdbg.c testLib4libopt.c)
+set_property(TARGET testLib4libdbg PROPERTY COMPILE_DEFINITIONS LIB_DBG)
+set_property(TARGET testLib4libopt PROPERTY COMPILE_DEFINITIONS LIB_OPT)
+target_link_libraries(testLib4
+  INTERFACE testLib4lib debug testLib4libdbg optimized testLib4libopt
+  )
+
 add_executable(testExe3 testExe3.c)
 set_property(TARGET testExe3 PROPERTY MACOSX_BUNDLE 1)
 
@@ -42,7 +58,7 @@ set_property(TARGET testExe3 PROPERTY MACOSX_BUNDLE 1)
 install(
   TARGETS
   testExe1 testLib1 testLib2 testExe2 testLib3 testLib4 testExe3
-  testExe2lib
+  testExe2lib testLib4lib testLib4libdbg testLib4libopt
   EXPORT exp
   RUNTIME DESTINATION bin
   LIBRARY DESTINATION lib NAMELINK_SKIP
@@ -67,6 +83,7 @@ export(TARGETS testExe1 testLib1 testLib2 testLib3
   FILE ExportBuildTree.cmake
   )
 export(TARGETS testExe2 testLib4 testExe3 testExe2lib
+  testLib4lib testLib4libdbg testLib4libopt
   NAMESPACE bld_
   APPEND FILE ExportBuildTree.cmake
   )

Tests/ExportImport/Export/testLib4lib.c

@@ -0,0 +1,4 @@
+int testLib4lib(void)
+{
+  return 0;
+}

Tests/ExportImport/Export/testLib4libdbg.c

@@ -0,0 +1,14 @@
+#ifdef LIB_DBG
+/* We are building in testLib4libdbg.  Provide the correct symbol.  */
+int testLib4libdbg(void)
+{
+  return 0;
+}
+#else
+/* We are not building in testLib4libdbg.  Poison the symbol.  */
+extern int testLib4libdbg_noexist(void);
+int testLib4libdbg(void)
+{
+  return testLib4libdbg_noexist();
+}
+#endif

Tests/ExportImport/Export/testLib4libopt.c

@@ -0,0 +1,14 @@
+#ifdef LIB_OPT
+/* We are building in testLib4libopt.  Provide the correct symbol.  */
+int testLib4libopt(void)
+{
+  return 0;
+}
+#else
+/* We are not building in testLib4libopt.  Poison the symbol.  */
+extern int testLib4libopt_noexist(void);
+int testLib4libopt(void)
+{
+  return testLib4libopt_noexist();
+}
+#endif

Tests/ExportImport/Import/CMakeLists.txt

@@ -32,6 +32,7 @@ add_executable(imp_testExe1
 
 # Try linking to a library imported from the install tree.
 target_link_libraries(imp_testExe1 exp_testLib2 exp_testLib3 exp_testLib4)
+set_property(TARGET imp_testExe1 PROPERTY COMPILE_DEFINITIONS_DEBUG EXE_DBG)
 
 # Try building a plugin to an executable imported from the install tree.
 add_library(imp_mod1 MODULE imp_mod1.c)
@@ -57,6 +58,7 @@ add_executable(imp_testExe1b
 
 # Try linking to a library imported from the build tree.
 target_link_libraries(imp_testExe1b bld_testLib2 bld_testLib3 bld_testLib4)
+set_property(TARGET imp_testExe1b PROPERTY COMPILE_DEFINITIONS_DEBUG EXE_DBG)
 
 # Try building a plugin to an executable imported from the build tree.
 add_library(imp_mod1b MODULE imp_mod1.c)

Tests/ExportImport/Import/imp_testExe1.c

@@ -3,9 +3,19 @@ extern int generated_by_testExe3();
 extern int testLib2();
 extern int testLib3();
 extern int testLib4();
+extern int testLib4lib();
+
+/* Switch a symbol between debug and optimized builds to make sure the
+   proper library is found from the testLib4 link interface.  */
+#ifdef EXE_DBG
+# define testLib4libcfg testLib4libdbg
+#else
+# define testLib4libcfg testLib4libopt
+#endif
+extern testLib4libcfg(void);
 
 int main()
 {
   return (testLib2() + generated_by_testExe1() + testLib3() + testLib4()
-          + generated_by_testExe3());
+          + generated_by_testExe3() + testLib4lib() + testLib4libcfg());
 }