WCDH: Make it possible to generate multiple files.

Extend the write_compiler_detection_header interface to allow
specifying a location for supplementary files, and getting the
list of resulting files as a variable.

4 files changed, 58 insertions, 23 deletions

diff --git a/Tests/Module/WriteCompilerDetectionHeader/CMakeLists.txt b/Tests/Module/WriteCompilerDetectionHeader/CMakeLists.txt
index 645cc65..b1bc822 100644
--- a/Tests/Module/WriteCompilerDetectionHeader/CMakeLists.txt
+++ b/Tests/Module/WriteCompilerDetectionHeader/CMakeLists.txt
@@ -67,6 +67,22 @@ add_executable(WriteCompilerDetectionHeader main.cpp)
 set_property(TARGET WriteCompilerDetectionHeader PROPERTY CXX_STANDARD 98)
 set_defines(WriteCompilerDetectionHeader "${true_defs}" "${false_defs}")
 
+write_compiler_detection_header(
+  FILE "${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files/multi_file_compiler_detection.h"
+  PREFIX MULTI
+  OUTPUT_FILES_VAR multi_files
+  OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files/compiler_support"
+  COMPILERS GNU Clang
+  VERSION 3.1
+  FEATURES
+    ${cxx_known_features} ${c_known_features}
+)
+
+add_executable(multi_files multi_files.cpp)
+set_property(TARGET multi_files PROPERTY CXX_STANDARD 98)
+target_include_directories(multi_files PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files)
+set_defines(multi_files "${true_defs}" "${false_defs}")
+
 if(MSVC)
   return() # MSVC has only one mode.
 endif()
@@ -86,3 +102,8 @@ endif()
 add_executable(WriteCompilerDetectionHeader_11 main.cpp)
 set_property(TARGET WriteCompilerDetectionHeader_11 PROPERTY CXX_STANDARD 11)
 set_defines(WriteCompilerDetectionHeader_11 "${true_defs}" "${false_defs}")
+
+add_executable(multi_files_11 multi_files.cpp)
+set_property(TARGET multi_files_11 PROPERTY CXX_STANDARD 11)
+target_include_directories(multi_files_11 PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files)
+set_defines(multi_files_11 "${true_defs}" "${false_defs}")
diff --git a/Tests/Module/WriteCompilerDetectionHeader/compile_tests.h b/Tests/Module/WriteCompilerDetectionHeader/compile_tests.h
new file mode 100644
index 0000000..8b547d8
--- /dev/null
+++ b/Tests/Module/WriteCompilerDetectionHeader/compile_tests.h
@@ -0,0 +1,25 @@
+
+#define JOIN_IMPL(A, B) A ## B
+#define JOIN(A, B) JOIN_IMPL(A, B)
+
+#define CHECK(FEATURE) (JOIN(PREFIX, JOIN(_COMPILER_, FEATURE)) == JOIN(EXPECTED_COMPILER_, FEATURE))
+
+#if !CHECK(CXX_DELEGATING_CONSTRUCTORS)
+#error cxx_delegating_constructors expected availability did not match.
+#endif
+
+#if !CHECK(CXX_VARIADIC_TEMPLATES)
+#error cxx_variadic_templates expected availability did not match.
+#endif
+
+#if !CHECK(VERSION_MAJOR)
+#error Compiler major version did not match.
+#endif
+
+#if !CHECK(VERSION_MINOR)
+#error Compiler minor version did not match.
+#endif
+
+#if !CHECK(VERSION_PATCH)
+#error Compiler patch version did not match.
+#endif
diff --git a/Tests/Module/WriteCompilerDetectionHeader/main.cpp b/Tests/Module/WriteCompilerDetectionHeader/main.cpp
index b807ad5..82b2191 100644
--- a/Tests/Module/WriteCompilerDetectionHeader/main.cpp
+++ b/Tests/Module/WriteCompilerDetectionHeader/main.cpp
@@ -1,29 +1,8 @@
 
 #include "test_compiler_detection.h"
 
-#define JOIN_IMPL(A, B) A ## B
-#define JOIN(A, B) JOIN_IMPL(A, B)
-#define CHECK(FEATURE) (JOIN(TEST_COMPILER_, FEATURE) == JOIN(EXPECTED_COMPILER_, FEATURE))
-
-#if !CHECK(CXX_DELEGATING_CONSTRUCTORS)
-#error cxx_delegating_constructors expected availability did not match.
-#endif
-
-#if !CHECK(CXX_VARIADIC_TEMPLATES)
-#error cxx_variadic_templates expected availability did not match.
-#endif
-
-#if !CHECK(VERSION_MAJOR)
-#error Compiler major version did not match.
-#endif
-
-#if !CHECK(VERSION_MINOR)
-#error Compiler minor version did not match.
-#endif
-
-#if !CHECK(VERSION_PATCH)
-#error Compiler patch version did not match.
-#endif
+#define PREFIX TEST
+#include "compile_tests.h"
 
 int main()
 {
diff --git a/Tests/Module/WriteCompilerDetectionHeader/multi_files.cpp b/Tests/Module/WriteCompilerDetectionHeader/multi_files.cpp
new file mode 100644
index 0000000..ca29823
--- /dev/null
+++ b/Tests/Module/WriteCompilerDetectionHeader/multi_files.cpp
@@ -0,0 +1,10 @@
+
+#include "multi_file_compiler_detection.h"
+
+#define PREFIX MULTI
+#include "compile_tests.h"
+
+int main()
+{
+  return 0;
+}