11 files changed, 83 insertions, 5 deletions
diff --git a/Tests/RunCMake/ABI/C-stdout.txt b/Tests/RunCMake/ABI/C-stdout.txt
new file mode 100644
index 0000000..5b67b84
--- /dev/null
+++ b/Tests/RunCMake/ABI/C-stdout.txt
@@ -0,0 +1 @@
+-- Check if the system is big endian
diff --git a/Tests/RunCMake/ABI/C.cmake b/Tests/RunCMake/ABI/C.cmake
index 51f5a34..92f5da4 100644
--- a/Tests/RunCMake/ABI/C.cmake
+++ b/Tests/RunCMake/ABI/C.cmake
@@ -1,4 +1,22 @@
 enable_language(C)
-if(NOT CMAKE_C_BYTE_ORDER MATCHES "^(BIG_ENDIAN|LITTLE_ENDIAN)$" AND NOT CMAKE_OSX_ARCHITECTURES MATCHES ";ppc|ppc;")
+if(NOT CMAKE_C_BYTE_ORDER MATCHES "^(BIG_ENDIAN|LITTLE_ENDIAN)$")
+  if(CMAKE_OSX_ARCHITECTURES MATCHES ";ppc|ppc;")
+    return()
+  endif()
   message(FATAL_ERROR "CMAKE_C_BYTE_ORDER has unexpected value '${CMAKE_C_BYTE_ORDER}'")
 endif()
+
+include(TestBigEndian)
+test_big_endian(IS_BIG_ENDIAN)
+if(IS_BIG_ENDIAN AND NOT CMAKE_C_BYTE_ORDER STREQUAL "BIG_ENDIAN")
+  message(FATAL_ERROR "test_big_endian result does not match ABI result")
+endif()
+
+# Test legacy check.
+set(byte_order "${CMAKE_C_BYTE_ORDER}")
+unset(CMAKE_C_BYTE_ORDER)
+include(TestBigEndian)
+test_big_endian(IS_BIG)
+if(IS_BIG AND NOT byte_order STREQUAL "BIG_ENDIAN")
+  message(FATAL_ERROR "test_big_endian result does not match ABI result")
+endif()
diff --git a/Tests/RunCMake/ABI/CUDA.cmake b/Tests/RunCMake/ABI/CUDA.cmake
index 1a40843..8ede3a9 100644
--- a/Tests/RunCMake/ABI/CUDA.cmake
+++ b/Tests/RunCMake/ABI/CUDA.cmake
@@ -1,4 +1,13 @@
 enable_language(CUDA)
-if(NOT CMAKE_CUDA_BYTE_ORDER MATCHES "^(BIG_ENDIAN|LITTLE_ENDIAN)$" AND NOT CMAKE_OSX_ARCHITECTURES MATCHES ";ppc|ppc;")
+if(NOT CMAKE_CUDA_BYTE_ORDER MATCHES "^(BIG_ENDIAN|LITTLE_ENDIAN)$")
+  if(CMAKE_OSX_ARCHITECTURES MATCHES ";ppc|ppc;")
+    return()
+  endif()
   message(FATAL_ERROR "CMAKE_CUDA_BYTE_ORDER has unexpected value '${CMAKE_CUDA_BYTE_ORDER}'")
 endif()
+
+include(TestBigEndian)
+test_big_endian(IS_BIG_ENDIAN)
+if(IS_BIG_ENDIAN AND NOT CMAKE_CUDA_BYTE_ORDER STREQUAL "BIG_ENDIAN")
+  message(FATAL_ERROR "test_big_endian result does not match ABI result")
+endif()
diff --git a/Tests/RunCMake/ABI/CXX-stdout.txt b/Tests/RunCMake/ABI/CXX-stdout.txt
new file mode 100644
index 0000000..5b67b84
--- /dev/null
+++ b/Tests/RunCMake/ABI/CXX-stdout.txt
@@ -0,0 +1 @@
+-- Check if the system is big endian
diff --git a/Tests/RunCMake/ABI/CXX.cmake b/Tests/RunCMake/ABI/CXX.cmake
index 7dc6f4a..2310002 100644
--- a/Tests/RunCMake/ABI/CXX.cmake
+++ b/Tests/RunCMake/ABI/CXX.cmake
@@ -1,4 +1,22 @@
 enable_language(CXX)
-if(NOT CMAKE_CXX_BYTE_ORDER MATCHES "^(BIG_ENDIAN|LITTLE_ENDIAN)$" AND NOT CMAKE_OSX_ARCHITECTURES MATCHES ";ppc|ppc;")
+if(NOT CMAKE_CXX_BYTE_ORDER MATCHES "^(BIG_ENDIAN|LITTLE_ENDIAN)$")
+  if(CMAKE_OSX_ARCHITECTURES MATCHES ";ppc|ppc;")
+    return()
+  endif()
   message(FATAL_ERROR "CMAKE_CXX_BYTE_ORDER has unexpected value '${CMAKE_CXX_BYTE_ORDER}'")
 endif()
+
+include(TestBigEndian)
+test_big_endian(IS_BIG_ENDIAN)
+if(IS_BIG_ENDIAN AND NOT CMAKE_CXX_BYTE_ORDER STREQUAL "BIG_ENDIAN")
+  message(FATAL_ERROR "test_big_endian result does not match ABI result")
+endif()
+
+# Test legacy check.
+set(byte_order "${CMAKE_CXX_BYTE_ORDER}")
+unset(CMAKE_CXX_BYTE_ORDER)
+include(TestBigEndian)
+test_big_endian(IS_BIG)
+if(IS_BIG AND NOT byte_order STREQUAL "BIG_ENDIAN")
+  message(FATAL_ERROR "test_big_endian result does not match ABI result")
+endif()
diff --git a/Tests/RunCMake/ABI/OBJC.cmake b/Tests/RunCMake/ABI/OBJC.cmake
index 9caccee..ab67459 100644
--- a/Tests/RunCMake/ABI/OBJC.cmake
+++ b/Tests/RunCMake/ABI/OBJC.cmake
@@ -1,4 +1,13 @@
 enable_language(OBJC)
-if(NOT CMAKE_OBJC_BYTE_ORDER MATCHES "^(BIG_ENDIAN|LITTLE_ENDIAN)$" AND NOT CMAKE_OSX_ARCHITECTURES MATCHES ";ppc|ppc;")
+if(NOT CMAKE_OBJC_BYTE_ORDER MATCHES "^(BIG_ENDIAN|LITTLE_ENDIAN)$")
+  if(CMAKE_OSX_ARCHITECTURES MATCHES ";ppc|ppc;")
+    return()
+  endif()
   message(FATAL_ERROR "CMAKE_OBJC_BYTE_ORDER has unexpected value '${CMAKE_OBJC_BYTE_ORDER}'")
 endif()
+
+include(TestBigEndian)
+test_big_endian(IS_BIG_ENDIAN)
+if(IS_BIG_ENDIAN AND NOT CMAKE_OBJC_BYTE_ORDER STREQUAL "BIG_ENDIAN")
+  message(FATAL_ERROR "test_big_endian result does not match ABI result")
+endif()
diff --git a/Tests/RunCMake/ABI/OBJCXX.cmake b/Tests/RunCMake/ABI/OBJCXX.cmake
index 8ddefc0..41a719e 100644
--- a/Tests/RunCMake/ABI/OBJCXX.cmake
+++ b/Tests/RunCMake/ABI/OBJCXX.cmake
@@ -1,4 +1,13 @@
 enable_language(OBJCXX)
-if(NOT CMAKE_OBJCXX_BYTE_ORDER MATCHES "^(BIG_ENDIAN|LITTLE_ENDIAN)$" AND NOT CMAKE_OSX_ARCHITECTURES MATCHES ";ppc|ppc;")
+if(NOT CMAKE_OBJCXX_BYTE_ORDER MATCHES "^(BIG_ENDIAN|LITTLE_ENDIAN)$")
+  if(CMAKE_OSX_ARCHITECTURES MATCHES ";ppc|ppc;")
+    return()
+  endif()
   message(FATAL_ERROR "CMAKE_OBJCXX_BYTE_ORDER has unexpected value '${CMAKE_OBJCXX_BYTE_ORDER}'")
 endif()
+
+include(TestBigEndian)
+test_big_endian(IS_BIG_ENDIAN)
+if(IS_BIG_ENDIAN AND NOT CMAKE_OBJCXX_BYTE_ORDER STREQUAL "BIG_ENDIAN")
+  message(FATAL_ERROR "test_big_endian result does not match ABI result")
+endif()
diff --git a/Tests/RunCMake/ABI/RunCMakeTest.cmake b/Tests/RunCMake/ABI/RunCMakeTest.cmake
index 883b849..d9eabb7 100644
--- a/Tests/RunCMake/ABI/RunCMakeTest.cmake
+++ b/Tests/RunCMake/ABI/RunCMakeTest.cmake
@@ -11,3 +11,5 @@ endif()
 if(CMake_TEST_CUDA)
   run_cmake(CUDA)
 endif()
+
+run_cmake(TestBigEndian-NoLang)
diff --git a/Tests/RunCMake/ABI/TestBigEndian-NoLang-result.txt b/Tests/RunCMake/ABI/TestBigEndian-NoLang-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/ABI/TestBigEndian-NoLang-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/ABI/TestBigEndian-NoLang-stderr.txt b/Tests/RunCMake/ABI/TestBigEndian-NoLang-stderr.txt
new file mode 100644
index 0000000..d0aa899
--- /dev/null
+++ b/Tests/RunCMake/ABI/TestBigEndian-NoLang-stderr.txt
@@ -0,0 +1,8 @@
+^CMake Error at [^
+]*/Modules/TestBigEndian.cmake:[0-9]+ \(message\):
+  TEST_BIG_ENDIAN needs either C or CXX language enabled
+Call Stack \(most recent call first\):
+  [^
+]*/Modules/TestBigEndian.cmake:[0-9]+ \(__TEST_BIG_ENDIAN_LEGACY_IMPL\)
+  TestBigEndian-NoLang.cmake:[0-9]+ \(test_big_endian\)
+  CMakeLists.txt:3 \(include\)$
diff --git a/Tests/RunCMake/ABI/TestBigEndian-NoLang.cmake b/Tests/RunCMake/ABI/TestBigEndian-NoLang.cmake
new file mode 100644
index 0000000..8c10201
--- /dev/null
+++ b/Tests/RunCMake/ABI/TestBigEndian-NoLang.cmake
@@ -0,0 +1,2 @@
+include(TestBigEndian)
+test_big_endian(var)