Add my upstream commit to fix the build with clang and our old base libstdc++.

svn path=/head/; revision=297614

devel/kdevelop-kde4/files/patch-git_e37294e

@@ -0,0 +1,132 @@
+commit e37294eaa6694e4cf93012569f5ef947651f50e3
+Author: Raphael Kubo da Costa <rakuco@FreeBSD.org>
+Date:   Mon May 28 15:40:15 2012 -0300
+
+    Look for ext/hash_map and unordered_map instead of checking gcc's version.
+    
+    Follow-up to commits 9f8e8f662974a1035ea64f0ab9404b8858a02a57 and
+    5c59bd61b1df1b963959f086c5202689c084e0f3. The decision of whether to
+    include <ext/hash_map> or <unordered_map> for gcc/clang was based on
+    whether gcc > 4.3 was installed or whether clang was being used. The
+    latter implicitly assumed a recent enough libstdc++ version (ie. >=
+    4.3) was being used, which might not be the case on systems such as
+    FreeBSD and possibly OS X.
+    
+    Instead of checking for compiler versions, we now look for these
+    headers: CMake first detects whether <unordered_map> is present and,
+    in case it is not, it looks for <ext/hash_map>. The checks in
+    languages/cpp/parser/parser.h have been updated as well. This should
+    cover all the cases being previously detected, as well as fix the
+    checks for FreeBSD and other systems where the build was failing
+    before with clang.
+    
+    Reviewed-by:    Millian Wolff
+    REVIEW:         105067
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 8a3be21..ce2a828 100644
+--- ./CMakeLists.txt
++++ ./CMakeLists.txt
+@@ -34,6 +34,20 @@ add_definitions(-DQT_USE_FAST_CONCATENATION -DQT_USE_FAST_OPERATOR_PLUS)
+ 
+ include_directories(${KDevelop_SOURCE_DIR} ${KDevelop_BINARY_DIR} ${KDE4_INCLUDES} )
+ 
++# TODO: Remove when LTS for g++ < 4.3 has ended.
++#       See also: languages/cpp/parser/parser.h
++if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
++    include(CheckIncludeFileCXX)
++    check_include_file_cxx(unordered_map HAVE_UNORDERED_MAP)
++
++    if(HAVE_UNORDERED_MAP)
++        message(STATUS "Enabling c++0x support for unordered map")
++        add_definitions( -std=c++0x ) # For unordered_map
++    else(HAVE_UNORDERED_MAP)
++        check_include_file_cxx(ext/hash_map HAVE_EXT_HASH_MAP)
++    endif(HAVE_UNORDERED_MAP)
++endif(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
++
+ # create config.h
+ include (ConfigureChecks.cmake)
+ configure_file (config.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config.h )
+diff --git a/config.h.cmake b/config.h.cmake
+index 0c41fe4..d76b3df 100644
+--- ./config.h.cmake
++++ ./config.h.cmake
+@@ -8,4 +8,10 @@
+ /* Valgrind presence */
+ #cmakedefine HAVE_VALGRIND_H 1
+ 
++/* Whether <unordered_map> exists */
++#cmakedefine HAVE_UNORDERED_MAP 1
++
++/* Whether <ext/hash_map> exists */
++#cmakedefine HAVE_EXT_HASH_MAP 1
++
+ #endif //  KDEVELOP_CONFIG_H
+diff --git a/languages/cpp/CMakeLists.txt b/languages/cpp/CMakeLists.txt
+index 1577a7b..94a9bec 100644
+--- ./languages/cpp/CMakeLists.txt
++++ ./languages/cpp/CMakeLists.txt
+@@ -9,22 +9,6 @@ include_directories(
+ 
+ add_definitions( -DKDE_DEFAULT_DEBUG_AREA=9007 )
+ 
+-if(CMAKE_COMPILER_IS_GNUCXX)
+-  # TODO: Remove when LTS for g++ < 4.3 has ended.
+-  #       See also: languages/cpp/parser/parser.h
+-  macro_ensure_version("4.3.0" "${_gcc_version}" GCC_IS_NEWER_THAN_4_3)
+-  if (GCC_IS_NEWER_THAN_4_3)
+-    message(STATUS "Enabling c++0x support for unordered map")
+-    add_definitions( -std=c++0x ) # For unordered_map
+-  else(GCC_IS_NEWER_THAN_4_3)
+-    add_definitions( -DGXX_LT_4_3 )
+-  endif (GCC_IS_NEWER_THAN_4_3)
+-endif(CMAKE_COMPILER_IS_GNUCXX)
+-if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+-  # TODO: version check?
+-  add_definitions( -std=c++0x )
+-endif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+-
+ add_subdirectory(parser)
+ add_subdirectory(cppduchain)
+ add_subdirectory(tests)
+diff --git a/languages/cpp/parser/parser.h b/languages/cpp/parser/parser.h
+index c519891..f498868 100644
+--- ./languages/cpp/parser/parser.h
++++ ./languages/cpp/parser/parser.h
+@@ -20,6 +20,8 @@
+ #ifndef PARSER_H
+ #define PARSER_H
+ 
++#include "config.h"
++
+ #include "ast.h"
+ #include "lexer.h"
+ #include "commentparser.h"
+@@ -30,18 +32,18 @@
+ #include <cppparserexport.h>
+ #include "commentformatter.h"
+ 
+-#ifdef Q_CC_MSVC
+-#include <hash_map>
+-using namespace stdext;
++#if defined(HAVE_UNORDERED_MAP) // CXX-0
++#include <unordered_map>
++template <class Key, class Data>
++class  hash_map : public std::unordered_map<Key, Data> { };
+ 
+-#elif defined GXX_LT_4_3
++#elif defined(HAVE_EXT_HASH_MAP)
+ #include <ext/hash_map>
+ using namespace __gnu_cxx;
+ 
+-#else // CXX-0
+-#include <unordered_map>
+-template <class Key, class Data>
+-class  hash_map : public std::unordered_map<Key, Data> { };
++#elif defined(Q_CC_MSVC)
++#include <hash_map>
++using namespace stdext;
+ #endif
+ 
+ class TokenStream;