Make the code independent of config.h

Now the Build tool needs to define -DHAVE_ZLIB and -DHAVE-PTHREAD rather
than providing a config.h

- Make pbconfig.h a manually written file to handle hash conditions
  according to platform related macros.
- Remove #include "config.h" from source code.
- Changed the configure.ac and Makefile.am to pass down the macros.
- Change cmake to pass down the the macros.

Change-Id: I537249d5df8fdeba189706aec436d1ab1104a4dc

4 files changed, 7 insertions, 139 deletions

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 727864ba..d36292df 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -8,11 +8,11 @@ if (MSVC)
   option(ZLIB "Build with zlib support" OFF)
 endif (MSVC)
 
+add_definitions(-DGOOGLE_PROTOBUF_CMAKE_BUILD)
+
 find_package(Threads REQUIRED)
 if (CMAKE_USE_PTHREADS_INIT)
-  set(HAVE_PTHREAD 1)
-else (CMAKE_USE_PTHREADS_INIT)
-  set(HAVE_PTHREAD 0)
+  add_definitions(-DHAVE_PTHREAD)
 endif (CMAKE_USE_PTHREADS_INIT)
 
 if (MSVC)
@@ -36,6 +36,10 @@ else (MSVC)
   endif (ZLIB_FOUND)
 endif (MSVC)
 
+if (HAVE_ZLIB)
+  add_definitions(-DHAVE_ZLIB)
+endif (HAVE_ZLIB)
+
 if (MSVC)
   if (BUILD_SHARED_LIBS)
     add_definitions(-DPROTOBUF_USE_DLLS)
@@ -43,10 +47,6 @@ if (MSVC)
   add_definitions(/wd4244 /wd4267 /wd4018 /wd4355 /wd4800 /wd4251 /wd4996 /wd4146 /wd4305)
 endif (MSVC)
 
-include(find_hash_map.cmake)
-
-configure_file(config.h.in config.h)
-configure_file(pbconfig.h.in google/protobuf/stubs/pbconfig.h)
 if (MSVC)
   string(REPLACE "/" "\\" PROTOBUF_SOURCE_WIN32_PATH ${protobuf_SOURCE_DIR})
   string(REPLACE "/" "\\" PROTOBUF_BINARY_WIN32_PATH ${protobuf_BINARY_DIR})
diff --git a/cmake/config.h.in b/cmake/config.h.in
deleted file mode 100644
index bca1cbba..00000000
--- a/cmake/config.h.in
+++ /dev/null
@@ -1,4 +0,0 @@
-#define GOOGLE_PROTOBUF_CMAKE_BUILD
-
-#define HAVE_PTHREAD ${HAVE_PTHREAD}
-#define HAVE_ZLIB ${HAVE_ZLIB}
diff --git a/cmake/find_hash_map.cmake b/cmake/find_hash_map.cmake
deleted file mode 100644
index 22796fb8..00000000
--- a/cmake/find_hash_map.cmake
+++ /dev/null
@@ -1,119 +0,0 @@
-include(CheckCXXSourceCompiles)
-
-function(find_hash_map)
-  set(HAVE_HASH_MAP 1 PARENT_SCOPE)
-  set(HAVE_HASH_SET 1 PARENT_SCOPE)
-  # Search for hash_map in the following order:
-  #  1. <unordered_map> ::std::unordered_map
-  #  2. <tr1/unordered_map> ::std::tr1::unordered_map
-  #  3. <hash_map> ::hash_map
-  #  4. <hash_map>  ::stdext::hash_map
-  #  5. <ext/hash_map> ::std::hash_map
-  #  6. <ext/hash_map> ::__gnu_cxx::hash_map
-  check_cxx_source_compiles("
-    #include <unordered_map>
-    int main() {  ::std::unordered_map<int, int> v; return v[0]; }
-  " HAS_STD_UNORDERED_MAP)
-  if (HAS_STD_UNORDERED_MAP)
-    set(HASH_NAMESPACE ::std PARENT_SCOPE)
-    set(HASH_MAP_H <unordered_map> PARENT_SCOPE)
-    set(HASH_MAP_CLASS unordered_map PARENT_SCOPE)
-    set(HASH_SET_H <unordered_set> PARENT_SCOPE)
-    set(HASH_SET_CLASS unordered_set PARENT_SCOPE)
-    return()
-  endif (HAS_STD_UNORDERED_MAP)
-
-  check_cxx_source_compiles("
-    #include <tr1/unordered_map>
-    int main() {  ::std::tr1::unordered_map<int, int> v; return v[0]; }
-  " HAS_STD_TR1_UNORDERED_MAP)
-  if (HAS_STD_TR1_UNORDERED_MAP)
-    set(HASH_NAMESPACE ::std::tr1 PARENT_SCOPE)
-    set(HASH_MAP_H <tr1/unordered_map> PARENT_SCOPE)
-    set(HASH_MAP_CLASS unordered_map PARENT_SCOPE)
-    set(HASH_SET_H <tr1/unordered_set> PARENT_SCOPE)
-    set(HASH_SET_CLASS unordered_set PARENT_SCOPE)
-    return()
-  endif (HAS_STD_TR1_UNORDERED_MAP)
-
-  check_cxx_source_compiles("
-    #include <hash_map>
-    int main() {  ::hash_map<int, int> v; return v[0]; }
-  " HAS_HASH_MAP)
-  if (HAS_HASH_MAP)
-    set(HASH_NAMESPACE :: PARENT_SCOPE)
-    set(HASH_MAP_H <hash_map> PARENT_SCOPE)
-    set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
-    set(HASH_SET_H <hash_set> PARENT_SCOPE)
-    set(HASH_SET_CLASS hash_set PARENT_SCOPE)
-    return()
-  endif (HAS_HASH_MAP)
-
-  check_cxx_source_compiles("
-    #include <hash_map>
-    int main() {  ::stdext::hash_map<int, int> v; return v[0]; }
-  " HAS_STDEXT_HASH_MAP)
-  if (HAS_STDEXT_HASH_MAP)
-    set(HASH_NAMESPACE ::stdext PARENT_SCOPE)
-    set(HASH_MAP_H <hash_map> PARENT_SCOPE)
-    set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
-    set(HASH_SET_H <hash_set> PARENT_SCOPE)
-    set(HASH_SET_CLASS hash_set PARENT_SCOPE)
-    return()
-  endif (HAS_STDEXT_HASH_MAP)
-
-  check_cxx_source_compiles("
-    #include <ext/hash_map>
-    int main() {  ::std::hash_map<int, int> v; return v[0]; }
-  " HAS_STD_HASH_MAP)
-  if (HAS_STD_HASH_MAP)
-    set(HASH_NAMESPACE ::std PARENT_SCOPE)
-    set(HASH_MAP_H <ext/hash_map> PARENT_SCOPE)
-    set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
-    set(HASH_SET_H <ext/hash_set> PARENT_SCOPE)
-    set(HASH_SET_CLASS hash_set PARENT_SCOPE)
-    return()
-  endif (HAS_STD_HASH_MAP)
-
-  check_cxx_source_compiles("
-    #include <ext/hash_map>
-    int main() {  ::__gnu_cxx::hash_map<int, int> v; return v[0]; }
-  " HAS_GNU_CXX_HASH_MAP)
-  if (HAS_GNU_CXX_HASH_MAP)
-    set(HASH_NAMESPACE ::gnu_cxx PARENT_SCOPE)
-    set(HASH_MAP_H <ext/hash_map> PARENT_SCOPE)
-    set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
-    set(HASH_SET_H <ext/hash_set> PARENT_SCOPE)
-    set(HASH_SET_CLASS hash_set PARENT_SCOPE)
-    return()
-  endif (HAS_GNU_CXX_HASH_MAP)
-
-  set(HAVE_HASH_MAP 0 PARENT_SCOPE)
-  set(HAVE_HASH_SET 0 PARENT_SCOPE)
-endfunction()
-
-function(find_hash_compare)
-  if (MSVC)
-    check_cxx_source_compiles("
-      #include ${HASH_MAP_H}
-      int main() { ::std::hash_compare<int> cp; return cp(0); }
-    " HAS_STD_HASH_COMPARE)
-    if (HAS_STD_HASH_COMPARE)
-      set(HASH_COMPARE ::std::hash_compare PARENT_SCOPE)
-      return()
-    endif (HAS_STD_HASH_COMPARE)
-
-    check_cxx_source_compiles("
-      #include ${HASH_MAP_H}
-      int main() { ::stdext::hash_compare<int> cp; return cp(0); }
-    " HAS_STDEXT_HASH_COMPARE)
-    if (HAS_STDEXT_HASH_COMPARE)
-      set(HASH_COMPARE ::stdext::hash_compare PARENT_SCOPE)
-      return()
-    endif (HAS_STDEXT_HASH_COMPARE)
-  endif (MSVC)
-  set(HASH_COMPARE PARENT_SCOPE)
-endfunction()
-
-find_hash_map()
-find_hash_compare()
diff --git a/cmake/pbconfig.h.in b/cmake/pbconfig.h.in
deleted file mode 100644
index fdc59686..00000000
--- a/cmake/pbconfig.h.in
+++ /dev/null
@@ -1,9 +0,0 @@
-#define GOOGLE_PROTOBUF_HAVE_HASH_MAP ${HAVE_HASH_MAP}
-#define GOOGLE_PROTOBUF_HAVE_HASH_SET ${HAVE_HASH_MAP}
-
-#define GOOGLE_PROTOBUF_HASH_NAMESPACE ${HASH_NAMESPACE}
-#define GOOGLE_PROTOBUF_HASH_MAP_H ${HASH_MAP_H}
-#define GOOGLE_PROTOBUF_HASH_MAP_CLASS ${HASH_MAP_CLASS}
-#define GOOGLE_PROTOBUF_HASH_SET_H ${HASH_SET_H}
-#define GOOGLE_PROTOBUF_HASH_SET_CLASS ${HASH_SET_CLASS}
-#define GOOGLE_PROTOBUF_HASH_COMPARE ${HASH_COMPARE}