cmTarget: Make the source files depend on the config.

Disallow the use of config-specific source files with
the Visual Studio and Xcode generators. They don't have
any way to represent the condition currently.

Use the same common-config API in cmQtAutoGenerators. While
it accepts config-specific files, it doesn't have to support
multiple configurations yet.

Loop over the configs in cmTargetTraceDependencies
and cmGlobalGenerator::WriteSummary and consume all source
files.

Loop over the configs in cmComputeTargetDepends and compute the
object library dependencies for each config.

8 files changed, 41 insertions, 0 deletions

diff --git a/Tests/RunCMake/CMakeLists.txt b/Tests/RunCMake/CMakeLists.txt
index 4f059d6..851de42 100644
--- a/Tests/RunCMake/CMakeLists.txt
+++ b/Tests/RunCMake/CMakeLists.txt
@@ -51,6 +51,7 @@ add_RunCMake_test(TargetPropertyGeneratorExpressions)
 add_RunCMake_test(Languages)
 add_RunCMake_test(ObjectLibrary)
 add_RunCMake_test(TargetObjects)
+add_RunCMake_test(TargetSources)
 add_RunCMake_test(find_dependency)
 if(NOT WIN32)
   add_RunCMake_test(PositionIndependentCode)
diff --git a/Tests/RunCMake/TargetSources/CMakeLists.txt b/Tests/RunCMake/TargetSources/CMakeLists.txt
new file mode 100644
index 0000000..12cd3c7
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/CMakeLists.txt
@@ -0,0 +1,3 @@
+cmake_minimum_required(VERSION 2.8.4)
+project(${RunCMake_TEST} NONE)
+include(${RunCMake_TEST}.cmake)
diff --git a/Tests/RunCMake/TargetSources/ConfigNotAllowed-result.txt b/Tests/RunCMake/TargetSources/ConfigNotAllowed-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/ConfigNotAllowed-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/TargetSources/ConfigNotAllowed-stderr.txt b/Tests/RunCMake/TargetSources/ConfigNotAllowed-stderr.txt
new file mode 100644
index 0000000..1de5dd7
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/ConfigNotAllowed-stderr.txt
@@ -0,0 +1,14 @@
+CMake Error in CMakeLists.txt:
+  Target "somelib" has source files which vary by configuration.  This is not
+  supported by the "[^"]+" generator.
+
+  Config "Debug":
+
+    .*/Tests/RunCMake/TargetSources/empty_1.cpp
+    .*/Tests/RunCMake/TargetSources/empty_2.cpp
+    .*/Tests/RunCMake/TargetSources/CMakeLists.txt
+
+  Config "Release":
+
+    .*/Tests/RunCMake/TargetSources/empty_1.cpp
+    .*/Tests/RunCMake/TargetSources/CMakeLists.txt
diff --git a/Tests/RunCMake/TargetSources/ConfigNotAllowed.cmake b/Tests/RunCMake/TargetSources/ConfigNotAllowed.cmake
new file mode 100644
index 0000000..02af379
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/ConfigNotAllowed.cmake
@@ -0,0 +1,2 @@
+
+add_library(somelib empty_1.cpp $<$<CONFIG:Debug>:empty_2.cpp>)
diff --git a/Tests/RunCMake/TargetSources/RunCMakeTest.cmake b/Tests/RunCMake/TargetSources/RunCMakeTest.cmake
new file mode 100644
index 0000000..1a3a7fa
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/RunCMakeTest.cmake
@@ -0,0 +1,6 @@
+include(RunCMake)
+
+if(RunCMake_GENERATOR MATCHES Xcode
+    OR RunCMake_GENERATOR MATCHES "Visual Studio")
+  run_cmake(ConfigNotAllowed)
+endif()
diff --git a/Tests/RunCMake/TargetSources/empty_1.cpp b/Tests/RunCMake/TargetSources/empty_1.cpp
new file mode 100644
index 0000000..bfbbdde
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/empty_1.cpp
@@ -0,0 +1,7 @@
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+int empty()
+{
+  return 0;
+}
diff --git a/Tests/RunCMake/TargetSources/empty_2.cpp b/Tests/RunCMake/TargetSources/empty_2.cpp
new file mode 100644
index 0000000..bfbbdde
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/empty_2.cpp
@@ -0,0 +1,7 @@
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+int empty()
+{
+  return 0;
+}