OpenCV 2.4.7 porting to PNaCl

ports/OpenCV/nacl.patch

+diff --git OpenCV_v2.4.7/XCompile-nacl.txt OpenCV_v2.4.7/XCompile-nacl.txt
+new file mode 100644
+index 0000000..c651a2a
+--- /dev/null
++++ Box2D_v2.2.1/XCompile-nacl.txt
+@@ -0,0 +1,17 @@
++# the name of the target operating system
++SET(CMAKE_SYSTEM_NAME Linux)
++
++SET(NACL_CROSS_PREFIX pnacl)
++
++# which compilers to use for C and C++
++SET(CMAKE_C_COMPILER "${NACLCC}")
++SET(CMAKE_CXX_COMPILER "${NACLCXX}")
++set(CMAKE_AR ${NACLAR} CACHE FILEPATH "Archiver")
++SET(CMAKE_LINKER "${NACLLD}")
++SET(_CMAKE_TOOLCHAIN_PREFIX ${NACL_CROSS_PREFIX})
++
++# here is the target environment located
++SET(CMAKE_FIND_ROOT_PATH ${NACL_TOOLCHAIN_ROOT})
++
++# pnacl abi says 32bits little endian
++set(CMAKE_SIZEOF_VOID_P 4)
+diff -Naur opencv-2.4.7/modules/contrib/src/inputoutput.cpp opencv-2.4.7.nacl/modules/contrib/src/inputoutput.cpp
+--- opencv-2.4.7/modules/contrib/src/inputoutput.cpp    2013-11-06 15:26:39.000000000 +0100
++++ opencv-2.4.7.nacl/modules/contrib/src/inputoutput.cpp       2013-11-19 10:36:46.000000000 +0100
+@@ -76,18 +76,6 @@
+             {
+                 return list;
+             }
+-
+-            while ((dirp = readdir(dp)) != NULL)
+-            {
+-                if (dirp->d_type == DT_REG)
+-                {
+-                    if (exten.compare("*") == 0)
+-                        list.push_back(static_cast<std::string>(dirp->d_name));
+-                    else
+-                        if (std::string(dirp->d_name).find(exten) != std::string::npos)
+-                            list.push_back(static_cast<std::string>(dirp->d_name));
+-                }
+-            }

[Sam Clegg, 2013/11/19 17:03:27]

Can you instead wrap these chunks in #ifndef __native_client__ and includes a
comment about why they were removed.  This makes the patch
more useful for upstream and future maintainers.

Same for all the other changes in this patch.

+             closedir(dp);
+         #endif
+ 
+@@ -166,20 +154,6 @@
+             {
+                 return list;
+             }
+-
+-            while ((dirp = readdir(dp)) != NULL)
+-            {
+-                if (dirp->d_type == DT_DIR &&
+-                    strcmp(dirp->d_name, ".") != 0 &&
+-                    strcmp(dirp->d_name, "..") != 0 )
+-                {
+-                    if (exten.compare("*") == 0)
+-                        list.push_back(static_cast<std::string>(dirp->d_name));
+-                    else
+-                        if (std::string(dirp->d_name).find(exten) != std::string::npos)
+-                            list.push_back(static_cast<std::string>(dirp->d_name));
+-                }
+-            }
+             closedir(dp);
+         #endif
+ 
+diff -Naur opencv-2.4.7/modules/core/include/opencv2/core/operations.hpp opencv-2.4.7.nacl/modules/core/include/opencv2/core/operations.hpp
+--- opencv-2.4.7/modules/core/include/opencv2/core/operations.hpp       2013-11-06 15:26:39.000000000 +0100
++++ opencv-2.4.7.nacl/modules/core/include/opencv2/core/operations.hpp  2013-11-19 10:39:15.000000000 +0100
+@@ -58,7 +58,7 @@
+ 
+   #if defined __clang__ && __clang_major__ >= 3 && !defined __ANDROID__
+     #ifdef __ATOMIC_SEQ_CST
+-        #define CV_XADD(addr, delta) __c11_atomic_fetch_add((_Atomic(int)*)(addr), (delta), __ATOMIC_SEQ_CST)
++        int CV_XADD(int* addr, int delta) { int tmp = *addr; *addr += delta; return tmp; } 
+     #else
+         #define CV_XADD(addr, delta) __atomic_fetch_add((_Atomic(int)*)(addr), (delta), 5)
+     #endif
+diff -Naur opencv-2.4.7/modules/flann/include/opencv2/flann/allocator.h opencv-2.4.7.nacl/modules/flann/include/opencv2/flann/allocator.h
+--- opencv-2.4.7/modules/flann/include/opencv2/flann/allocator.h        2013-11-06 15:26:39.000000000 +0100
++++ opencv-2.4.7.nacl/modules/flann/include/opencv2/flann/allocator.h   2013-11-19 10:40:38.000000000 +0100
+@@ -68,7 +68,7 @@
+  *
+  */
+ 
+-const size_t     WORDSIZE=16;
++//const size_t     WORDSIZE=16;
+ const  size_t     BLOCKSIZE=8192;
+ 
+ class PooledAllocator
+diff -Naur opencv-2.4.7/modules/legacy/src/calibfilter.cpp opencv-2.4.7.nacl/modules/legacy/src/calibfilter.cpp
+--- opencv-2.4.7/modules/legacy/src/calibfilter.cpp     2013-11-06 15:26:39.000000000 +0100
++++ opencv-2.4.7.nacl/modules/legacy/src/calibfilter.cpp        2013-11-19 10:44:15.000000000 +0100
+@@ -42,7 +42,7 @@
+ #include "precomp.hpp"
+ #include <stdio.h>
+ 
+-#undef quad
++//#undef quad
+ 
+ CvCalibFilter::CvCalibFilter()
+ {
+diff -Naur opencv-2.4.7/modules/legacy/src/epilines.cpp opencv-2.4.7.nacl/modules/legacy/src/epilines.cpp
+--- opencv-2.4.7/modules/legacy/src/epilines.cpp        2013-11-06 15:26:39.000000000 +0100
++++ opencv-2.4.7.nacl/modules/legacy/src/epilines.cpp   2013-11-19 10:44:23.000000000 +0100
+@@ -46,7 +46,7 @@
+ 
+ /* Valery Mosyagin */
+ 
+-#undef quad
++//#undef quad
+ 
+ #define EPS64D 1e-9
+