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.

14 files changed, 115 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;
+}
diff --git a/Tests/RunCMake/WriteCompilerDetectionHeader/MultiBadOutDir-result.txt b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiBadOutDir-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiBadOutDir-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/WriteCompilerDetectionHeader/MultiBadOutDir-stderr.txt b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiBadOutDir-stderr.txt
new file mode 100644
index 0000000..6658d5d
--- /dev/null
+++ b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiBadOutDir-stderr.txt
@@ -0,0 +1,6 @@
+CMake Error at .*Modules/WriteCompilerDetectionHeader.cmake:[0-9]+ \(message\):
+  The compiler-specific output directory must be within the same directory as
+  the main file.
+Call Stack \(most recent call first\):
+  MultiBadOutDir.cmake:4 \(write_compiler_detection_header\)
+  CMakeLists.txt:3 \(include\)
diff --git a/Tests/RunCMake/WriteCompilerDetectionHeader/MultiBadOutDir.cmake b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiBadOutDir.cmake
new file mode 100644
index 0000000..b545bee
--- /dev/null
+++ b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiBadOutDir.cmake
@@ -0,0 +1,12 @@
+
+include(WriteCompilerDetectionHeader)
+
+write_compiler_detection_header(
+  FILE "${CMAKE_CURRENT_BINARY_DIR}/dir/somefile"
+  PREFIX Pref
+  OUTPUT_FILES_VAR outfiles
+  OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}"
+  COMPILERS GNU
+  VERSION 3.1
+  FEATURES cxx_auto_type
+)
diff --git a/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutFileVar-result.txt b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutFileVar-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutFileVar-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutFileVar-stderr.txt b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutFileVar-stderr.txt
new file mode 100644
index 0000000..50f9b6f
--- /dev/null
+++ b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutFileVar-stderr.txt
@@ -0,0 +1,5 @@
+CMake Error at .*Modules/WriteCompilerDetectionHeader.cmake:[0-9]+ \(message\):
+  If OUTPUT_DIR is specified, then OUTPUT_FILES_VAR must also be specified.
+Call Stack \(most recent call first\):
+  MultiNoOutFileVar.cmake:4 \(write_compiler_detection_header\)
+  CMakeLists.txt:3 \(include\)
diff --git a/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutFileVar.cmake b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutFileVar.cmake
new file mode 100644
index 0000000..e42b0ed
--- /dev/null
+++ b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutFileVar.cmake
@@ -0,0 +1,11 @@
+
+include(WriteCompilerDetectionHeader)
+
+write_compiler_detection_header(
+  FILE "${CMAKE_CURRENT_BINARY_DIR}/somefile"
+  PREFIX Pref
+  OUTPUT_DIR outfiles
+  COMPILERS GNU
+  VERSION 3.1
+  FEATURES cxx_auto_type
+)
diff --git a/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutdir-result.txt b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutdir-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutdir-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutdir-stderr.txt b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutdir-stderr.txt
new file mode 100644
index 0000000..1c83a1a
--- /dev/null
+++ b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutdir-stderr.txt
@@ -0,0 +1,5 @@
+CMake Error at .*Modules/WriteCompilerDetectionHeader.cmake:[0-9]+ \(message\):
+  If OUTPUT_FILES_VAR is specified, then OUTPUT_DIR must also be specified.
+Call Stack \(most recent call first\):
+  MultiNoOutdir.cmake:4 \(write_compiler_detection_header\)
+  CMakeLists.txt:3 \(include\)
diff --git a/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutdir.cmake b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutdir.cmake
new file mode 100644
index 0000000..e8c2ae1
--- /dev/null
+++ b/Tests/RunCMake/WriteCompilerDetectionHeader/MultiNoOutdir.cmake
@@ -0,0 +1,11 @@
+
+include(WriteCompilerDetectionHeader)
+
+write_compiler_detection_header(
+  FILE "${CMAKE_CURRENT_BINARY_DIR}/somefile"
+  PREFIX Pref
+  OUTPUT_FILES_VAR outfiles
+  COMPILERS GNU
+  VERSION 3.1
+  FEATURES cxx_auto_type
+)
diff --git a/Tests/RunCMake/WriteCompilerDetectionHeader/RunCMakeTest.cmake b/Tests/RunCMake/WriteCompilerDetectionHeader/RunCMakeTest.cmake
index 6dded44..a834e6d 100644
--- a/Tests/RunCMake/WriteCompilerDetectionHeader/RunCMakeTest.cmake
+++ b/Tests/RunCMake/WriteCompilerDetectionHeader/RunCMakeTest.cmake
@@ -12,3 +12,7 @@ run_cmake(InvalidFeature)
 run_cmake(InvalidCXXFeature)
 run_cmake(EmptyPrefix)
 run_cmake(InvalidPrefix)
+run_cmake(MultiNoOutdir)
+run_cmake(MultiNoOutFileVar)
+set(NO_CACHE TRUE)
+run_cmake(MultiBadOutDir)