From da460f9008f5a949f663e749455e15fb5959d803 Mon Sep 17 00:00:00 2001
From: Bill Hoffman <bill.hoffman@kitware.com>
Date: Tue, 22 Oct 2002 18:17:07 -0400
Subject: [PATCH] test for gnu compiler

---
 Modules/CMakeDetermineCCompiler.cmake   | 12 ++++++++----
 Modules/CMakeDetermineCXXCompiler.cmake |  9 +++++++++
 Modules/CMakeTestGNU.c                  |  3 +++
 Modules/Windows.cmake                   |  4 ++++
 4 files changed, 24 insertions(+), 4 deletions(-)
 create mode 100644 Modules/CMakeTestGNU.c
 create mode 100644 Modules/Windows.cmake

diff --git a/Modules/CMakeDetermineCCompiler.cmake b/Modules/CMakeDetermineCCompiler.cmake
index c1fc85c7a..1035f1bb4 100644
--- a/Modules/CMakeDetermineCCompiler.cmake
+++ b/Modules/CMakeDetermineCCompiler.cmake
@@ -4,8 +4,12 @@
 
 FIND_PROGRAM(CMAKE_C_COMPILER NAMES $ENV{CC} gcc cc cl bcc PATHS /bin /usr/bin /usr/local/bin )
 
+# test to see if the c compiler is gnu
+EXEC_PROGRAM(${CMAKE_C_COMPILER} ARGS -E ${CMAKE_ROOT}/Modules/CMakeTestGNU.c OUTPUT_VARIABLE CMAKE_COMPILER_OUTPUT RETURN_VALUE CMAKE_COMPILER_RETURN)
+
+IF(NOT CMAKE_COMPILER_RETURN)
+   IF(${CMAKE_COMPILER_OUTPUT} MATCHES ".*THIS_IS_GNU.*" )
+      SET(CMAKE_COMPILER_IS_GNUGCC 1)
+   ENDIF(${CMAKE_COMPILER_OUTPUT} MATCHES ".*THIS_IS_GNU.*" )
+ENDIF(NOT CMAKE_COMPILER_RETURN)
 
-# to check for is gnu we need to compile this:
-#  #ifdef __GNUC__
-#  yes;
-#  #endif
diff --git a/Modules/CMakeDetermineCXXCompiler.cmake b/Modules/CMakeDetermineCXXCompiler.cmake
index 72ee90aed..5b09e8531 100644
--- a/Modules/CMakeDetermineCXXCompiler.cmake
+++ b/Modules/CMakeDetermineCXXCompiler.cmake
@@ -3,3 +3,12 @@
 # loading this file to force a compiler.
 
 FIND_PROGRAM(CMAKE_CXX_COMPILER NAMES $ENV{CXX} c++ g++ CC aCC cl bcc PATHS /bin /usr/bin /usr/local/bin )
+
+# test to see if the cxx compiler is gnu
+EXEC_PROGRAM(${CMAKE_CXX_COMPILER} ARGS -E ${CMAKE_ROOT}/Modules/CMakeTestGNU.c OUTPUT_VARIABLE CMAKE_COMPILER_OUTPUT RETURN_VALUE CMAKE_COMPILER_RETURN)
+
+IF(NOT CMAKE_COMPILER_RETURN)
+   IF(${CMAKE_COMPILER_OUTPUT} MATCHES ".*THIS_IS_GNU.*" )
+      SET(CMAKE_COMPILER_IS_GNUGXX 1)
+   ENDIF(${CMAKE_COMPILER_OUTPUT} MATCHES ".*THIS_IS_GNU.*" )
+ENDIF(NOT CMAKE_COMPILER_RETURN)
diff --git a/Modules/CMakeTestGNU.c b/Modules/CMakeTestGNU.c
new file mode 100644
index 000000000..1cd56244b
--- /dev/null
+++ b/Modules/CMakeTestGNU.c
@@ -0,0 +1,3 @@
+#ifdef __GNUC__
+THIS_IS_GNU
+#endif
diff --git a/Modules/Windows.cmake b/Modules/Windows.cmake
new file mode 100644
index 000000000..0c1fa6cc6
--- /dev/null
+++ b/Modules/Windows.cmake
@@ -0,0 +1,4 @@
+SET(CMAKE_SHARED_LIBRARY_CREATE_FLAGS "")
+SET(CMAKE_DL_LIBS "" )
+SET(CMAKE_SHARED_LIBRARY_PREFIX "")
+SET(CMAKE_SHARED_LIBRARY_SUFFIX ".dll")