Process the INTERFACE_PIC property from linked dependencies

This allows a dependee to inform a target that it should have its
POSITION_INDEPENDENT_CODE property set to ON, or OFF. The value of
the POSITION_INDEPENDENT_CODE property, if set, must be consistent
with any INTERFACE_POSITION_INDEPENDENT_CODE properties on dependees.

Add a test covering the consistency checks on platforms where they run.

12 files changed, 59 insertions, 0 deletions

diff --git a/Tests/RunCMake/PositionIndependentCode/CMakeLists.txt b/Tests/RunCMake/PositionIndependentCode/CMakeLists.txt
new file mode 100644
index 0000000..22577da
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/CMakeLists.txt
@@ -0,0 +1,8 @@
+
+cmake_minimum_required(VERSION 2.8)
+project(${RunCMake_TEST} CXX)
+
+# MSVC creates extra targets which pollute the stderr unless we set this.
+set(CMAKE_SUPPRESS_REGENERATION TRUE)
+
+include(${RunCMake_TEST}.cmake)
diff --git a/Tests/RunCMake/PositionIndependentCode/Conflict1-result.txt b/Tests/RunCMake/PositionIndependentCode/Conflict1-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/Conflict1-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/PositionIndependentCode/Conflict1-stderr.txt b/Tests/RunCMake/PositionIndependentCode/Conflict1-stderr.txt
new file mode 100644
index 0000000..cb07109
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/Conflict1-stderr.txt
@@ -0,0 +1,3 @@
+CMake Error: Property POSITION_INDEPENDENT_CODE on target "conflict" does
+not match the INTERFACE_POSITION_INDEPENDENT_CODE property requirement
+of dependency "piciface".
diff --git a/Tests/RunCMake/PositionIndependentCode/Conflict1.cmake b/Tests/RunCMake/PositionIndependentCode/Conflict1.cmake
new file mode 100644
index 0000000..242bec3
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/Conflict1.cmake
@@ -0,0 +1,7 @@
+
+add_library(piciface UNKNOWN IMPORTED)
+set_property(TARGET piciface PROPERTY INTERFACE_POSITION_INDEPENDENT_CODE ON)
+
+add_executable(conflict "main.cpp")
+set_property(TARGET conflict PROPERTY POSITION_INDEPENDENT_CODE OFF)
+target_link_libraries(conflict piciface)
diff --git a/Tests/RunCMake/PositionIndependentCode/Conflict2-result.txt b/Tests/RunCMake/PositionIndependentCode/Conflict2-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/Conflict2-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/PositionIndependentCode/Conflict2-stderr.txt b/Tests/RunCMake/PositionIndependentCode/Conflict2-stderr.txt
new file mode 100644
index 0000000..ecd0492
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/Conflict2-stderr.txt
@@ -0,0 +1,3 @@
+CMake Error: The INTERFACE_POSITION_INDEPENDENT_CODE property of "picoff" does
+not agree with the value of POSITION_INDEPENDENT_CODE already determined
+for "conflict".
diff --git a/Tests/RunCMake/PositionIndependentCode/Conflict2.cmake b/Tests/RunCMake/PositionIndependentCode/Conflict2.cmake
new file mode 100644
index 0000000..215d08d
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/Conflict2.cmake
@@ -0,0 +1,9 @@
+
+add_library(picon UNKNOWN IMPORTED)
+set_property(TARGET picon PROPERTY INTERFACE_POSITION_INDEPENDENT_CODE ON)
+
+add_library(picoff UNKNOWN IMPORTED)
+set_property(TARGET picoff PROPERTY INTERFACE_POSITION_INDEPENDENT_CODE OFF)
+
+add_executable(conflict "main.cpp")
+target_link_libraries(conflict picon picoff)
diff --git a/Tests/RunCMake/PositionIndependentCode/Conflict3-result.txt b/Tests/RunCMake/PositionIndependentCode/Conflict3-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/Conflict3-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/PositionIndependentCode/Conflict3-stderr.txt b/Tests/RunCMake/PositionIndependentCode/Conflict3-stderr.txt
new file mode 100644
index 0000000..0254e55
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/Conflict3-stderr.txt
@@ -0,0 +1,4 @@
+Property POSITION_INDEPENDENT_CODE on target "conflict" is
+implied to be FALSE because it was used to determine the link libraries
+already. The INTERFACE_POSITION_INDEPENDENT_CODE property on
+dependency "picon" is in conflict.
diff --git a/Tests/RunCMake/PositionIndependentCode/Conflict3.cmake b/Tests/RunCMake/PositionIndependentCode/Conflict3.cmake
new file mode 100644
index 0000000..bf669bf
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/Conflict3.cmake
@@ -0,0 +1,12 @@
+
+add_library(picoff UNKNOWN IMPORTED)
+
+add_library(picon UNKNOWN IMPORTED)
+set_property(TARGET picon PROPERTY INTERFACE_POSITION_INDEPENDENT_CODE ON)
+
+add_executable(conflict "main.cpp")
+target_link_libraries(conflict picon)
+set_property(TARGET conflict APPEND PROPERTY
+  LINK_LIBRARIES
+    $<$<NOT:$<BOOL:$<TARGET_PROPERTY:POSITION_INDEPENDENT_CODE>>>:picoff>
+)
diff --git a/Tests/RunCMake/PositionIndependentCode/RunCMakeTest.cmake b/Tests/RunCMake/PositionIndependentCode/RunCMakeTest.cmake
new file mode 100644
index 0000000..64a340c
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/RunCMakeTest.cmake
@@ -0,0 +1,5 @@
+include(RunCMake)
+
+run_cmake(Conflict1)
+run_cmake(Conflict2)
+run_cmake(Conflict3)
diff --git a/Tests/RunCMake/PositionIndependentCode/main.cpp b/Tests/RunCMake/PositionIndependentCode/main.cpp
new file mode 100644
index 0000000..31ba482
--- /dev/null
+++ b/Tests/RunCMake/PositionIndependentCode/main.cpp
@@ -0,0 +1,5 @@
+
+int main(int,char**)
+{
+  return 0;
+}