ENH: Update BuildDepends test to check #include lines with macros.

  - Tests IMPLICIT_DEPENDS_INCLUDE_TRANSFORM properties.
  - See issue #6648.
  - Works without help in VS IDEs due to native dependency handling.
  - Xcode needs help to rebuild correctly.

Tests/BuildDepends/CMakeLists.txt

@@ -12,6 +12,22 @@ project(BuildDepends)
 # project is built.
 set(CMAKE_SUPPRESS_REGENERATION 1)
 
+# Xcode needs some help with the fancy dependencies in this test.
+if("${CMAKE_GENERATOR}" MATCHES "Xcode")
+  set(HELP_XCODE 1)
+endif("${CMAKE_GENERATOR}" MATCHES "Xcode")
+function(help_xcode_depends)
+  if(HELP_XCODE)
+    file(GLOB_RECURSE MACRO_OBJS
+      ${BuildDepends_BINARY_DIR}/Project/zot_macro_*.o*
+      )
+    if(MACRO_OBJS)
+      message("Helping Xcode by removing objects [${MACRO_OBJS}]")
+      file(REMOVE ${MACRO_OBJS})
+    endif(MACRO_OBJS)
+  endif(HELP_XCODE)
+endfunction(help_xcode_depends)
+
 file(MAKE_DIRECTORY ${BuildDepends_BINARY_DIR}/Project)
 message("Creating Project/foo.cxx")
 write_file(${BuildDepends_BINARY_DIR}/Project/foo.cxx 
@@ -21,6 +37,12 @@ file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot.hxx.in
   "static const char* zot = \"zot\";\n")
 file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot_custom.hxx.in
   "static const char* zot_custom = \"zot_custom\";\n")
+file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot_macro_dir.hxx
+  "static const char* zot_macro_dir = \"zot_macro_dir\";\n")
+file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot_macro_tgt.hxx
+  "static const char* zot_macro_tgt = \"zot_macro_tgt\";\n")
+
+help_xcode_depends()
 
 message("Building project first time")
 try_compile(RESULT 
@@ -28,7 +50,7 @@ try_compile(RESULT
   ${BuildDepends_SOURCE_DIR}/Project
   testRebuild
   OUTPUT_VARIABLE OUTPUT)
-if("${CMAKE_GENERATOR}" MATCHES "Xcode")
+if(HELP_XCODE)
   try_compile(RESULT 
     ${BuildDepends_BINARY_DIR}/Project
     ${BuildDepends_SOURCE_DIR}/Project
@@ -39,7 +61,7 @@ if("${CMAKE_GENERATOR}" MATCHES "Xcode")
     ${BuildDepends_SOURCE_DIR}/Project
     testRebuild
     OUTPUT_VARIABLE OUTPUT)
-endif("${CMAKE_GENERATOR}" MATCHES "Xcode")
+endif(HELP_XCODE)
 
 if(NOT RESULT)
   message(SEND_ERROR "Could not build test project: ${OUTPUT}")
@@ -78,11 +100,12 @@ execute_process(COMMAND ${zot} OUTPUT_VARIABLE out RESULT_VARIABLE runResult)
 string(REGEX REPLACE "[\r\n]" " " out "${out}")
 message("Run result: ${runResult} Output: \"${out}\"")
 
-if("${out}" STREQUAL "[zot] [zot_custom] ")
+set(VALUE_UNCHANGED "[zot] [zot_custom] [zot_macro_dir] [zot_macro_tgt] ")
+if("${out}" STREQUAL "${VALUE_UNCHANGED}")
   message("Worked!")
-else("${out}" STREQUAL "[zot] [zot_custom] ")
+else("${out}" STREQUAL "${VALUE_UNCHANGED}")
   message(SEND_ERROR "Project did not initially build properly: ${out}")
-endif("${out}" STREQUAL "[zot] [zot_custom] ")
+endif("${out}" STREQUAL "${VALUE_UNCHANGED}")
 
 message("Waiting 3 seconds...")
 # any additional argument will cause ${bar} to wait forever
@@ -95,6 +118,12 @@ file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot.hxx.in
   "static const char* zot = \"zot changed\";\n")
 file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot_custom.hxx.in
   "static const char* zot_custom = \"zot_custom changed\";\n")
+file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot_macro_dir.hxx
+  "static const char* zot_macro_dir = \"zot_macro_dir changed\";\n")
+file(WRITE ${BuildDepends_BINARY_DIR}/Project/zot_macro_tgt.hxx
+  "static const char* zot_macro_tgt = \"zot_macro_tgt changed\";\n")
+
+help_xcode_depends()
 
 message("Building project second time")
 try_compile(RESULT 
@@ -104,7 +133,7 @@ try_compile(RESULT
   OUTPUT_VARIABLE OUTPUT)
 
 # Xcode is in serious need of help here
-if("${CMAKE_GENERATOR}" MATCHES "Xcode")
+if(HELP_XCODE)
   try_compile(RESULT 
     ${BuildDepends_BINARY_DIR}/Project
     ${BuildDepends_SOURCE_DIR}/Project
@@ -115,7 +144,7 @@ if("${CMAKE_GENERATOR}" MATCHES "Xcode")
     ${BuildDepends_SOURCE_DIR}/Project
     testRebuild
     OUTPUT_VARIABLE OUTPUT)
-endif("${CMAKE_GENERATOR}" MATCHES "Xcode")
+endif(HELP_XCODE)
 
 if(NOT RESULT)
   message(SEND_ERROR "Could not build test project: ${OUTPUT}")
@@ -147,8 +176,11 @@ execute_process(COMMAND ${zot} OUTPUT_VARIABLE out RESULT_VARIABLE runResult)
 string(REGEX REPLACE "[\r\n]" " " out "${out}")
 message("Run result: ${runResult} Output: \"${out}\"")
 
-if("${out}" STREQUAL "[zot changed] [zot_custom changed] ")
+set(VALUE_CHANGED
+  "[zot changed] [zot_custom changed] [zot_macro_dir changed] [zot_macro_tgt changed] "
+  )
+if("${out}" STREQUAL "${VALUE_CHANGED}")
   message("Worked!")
-else("${out}" STREQUAL "[zot changed] [zot_custom changed] ")
+else("${out}" STREQUAL "${VALUE_CHANGED}")
   message(SEND_ERROR "Project did not rebuild properly!")
-endif("${out}" STREQUAL "[zot changed] [zot_custom changed] ")
+endif("${out}" STREQUAL "${VALUE_CHANGED}")

Tests/BuildDepends/Project/CMakeLists.txt

+cmake_minimum_required(VERSION 2.6)
 project(testRebuild)
 add_library(foo STATIC ${testRebuild_BINARY_DIR}/foo.cxx)
 
@@ -57,5 +58,17 @@ add_custom_command(
 add_custom_target(zot_custom ALL DEPENDS
   ${CMAKE_CURRENT_BINARY_DIR}/zot_custom.hxx)
 
-add_executable(zot zot.cxx ${CMAKE_CURRENT_BINARY_DIR}/zot.hxx)
+add_executable(zot zot.cxx ${CMAKE_CURRENT_BINARY_DIR}/zot.hxx
+  zot_macro_dir.cxx zot_macro_tgt.cxx)
 add_dependencies(zot zot_custom)
+
+# Test the #include line macro transformation rule support.
+set_property(
+  TARGET zot
+  PROPERTY IMPLICIT_DEPENDS_INCLUDE_TRANSFORM "ZOT_TGT(%)=<zot_%_tgt.hxx>"
+  )
+
+set_property(
+  DIRECTORY
+  PROPERTY IMPLICIT_DEPENDS_INCLUDE_TRANSFORM "ZOT_DIR(%)=<zot_%_dir.hxx>"
+  )

Tests/BuildDepends/Project/zot.cxx

@@ -2,9 +2,13 @@
 #include <zot_custom.hxx>
 #include <stdio.h>
 
+const char* zot_macro_dir_f();
+const char* zot_macro_tgt_f();
+
 int main()
 {
-  printf("[%s] [%s]\n", zot, zot_custom);
+  printf("[%s] [%s] [%s] [%s]\n", zot, zot_custom,
+         zot_macro_dir_f(), zot_macro_tgt_f());
   fflush(stdout);
   return 0;
 }

Tests/BuildDepends/Project/zot_macro_dir.cxx

+#define ZOT_DIR(x) <zot_##x##_dir.hxx>
+#include ZOT_DIR(macro)
+
+const char* zot_macro_dir_f()
+{
+  return zot_macro_dir;
+}

Tests/BuildDepends/Project/zot_macro_tgt.cxx

+#define ZOT_TGT(x) <zot_##x##_tgt.hxx>
+#include ZOT_TGT(macro)
+
+const char* zot_macro_tgt_f()
+{
+  return zot_macro_tgt;
+}