From a6b60841dbc56b896380435e4e190cbdc6e1a25a Mon Sep 17 00:00:00 2001
From: Bill Hoffman <bill.hoffman@kitware.com>
Date: Wed, 28 Apr 2004 13:21:56 -0400
Subject: BUG: fix for bug 116 platform files can now specify directories that
 should not be added by CMAKE

---
 Modules/Platform/Darwin.cmake           |  2 ++
 Source/cmLocalUnixMakefileGenerator.cxx | 15 ++++++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/Modules/Platform/Darwin.cmake b/Modules/Platform/Darwin.cmake
index 8c8dc3a..8a1fd17 100644
--- a/Modules/Platform/Darwin.cmake
+++ b/Modules/Platform/Darwin.cmake
@@ -25,3 +25,5 @@ SET(CMAKE_C_CREATE_SHARED_MODULE
       "<CMAKE_C_COMPILER> <CMAKE_SHARED_MODULE_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 
 INCLUDE(${CMAKE_ROOT}/Modules/Platform/gcc.cmake)
+
+SET(CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES /usr/local/include)
diff --git a/Source/cmLocalUnixMakefileGenerator.cxx b/Source/cmLocalUnixMakefileGenerator.cxx
index 80dd767..9e221cc 100644
--- a/Source/cmLocalUnixMakefileGenerator.cxx
+++ b/Source/cmLocalUnixMakefileGenerator.cxx
@@ -2487,13 +2487,26 @@ void cmLocalUnixMakefileGenerator::OutputMakeVariables(std::ostream& fout)
   std::vector<std::string>::iterator i;
   fout << "-I" << 
     this->ConvertToOutputForExisting(m_Makefile->GetStartDirectory()) << " ";
+  std::map<cmStdString, cmStdString> implicitIncludes;
+  implicitIncludes["/usr/include"] = "/usr/include";
+  if(m_Makefile->GetDefinition("CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES"))
+    {
+    std::string arg = m_Makefile->GetDefinition("CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES");
+    std::vector<std::string> implicitIncludeVec;
+    cmSystemTools::ExpandListArgument(arg, implicitIncludeVec);
+    for(int k =0; k < implicitIncludeVec.size(); k++)
+      {
+      implicitIncludes[implicitIncludeVec[k]] = implicitIncludeVec[k];
+      }
+    }
+  
   for(i = includes.begin(); i != includes.end(); ++i)
     {
     std::string include = *i;
     // Don't output a -I for the standard include path "/usr/include".
     // This can cause problems with certain standard library
     // implementations because the wrong headers may be found first.
-    if(include != "/usr/include")
+    if(implicitIncludes.find(include) == implicitIncludes.end())
       {
       fout << "-I" << this->ConvertToOutputForExisting(i->c_str()) << " ";
       }
-- 
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