From b6c355245860cb15fea991fb6632dfa5cfedea2b Mon Sep 17 00:00:00 2001
From: Robin Mills <robin@clanmills.com>
Date: Fri, 30 Sep 2016 13:14:39 +0000
Subject: [PATCH] #1230 Work in Progress.  CMake/MinGW/32.

---
 README-CMAKE |  3 +++
 TODO-CMAKE   | 50 ++++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 49 insertions(+), 4 deletions(-)

diff --git a/README-CMAKE b/README-CMAKE
index b93182bd..a22e4971 100644
--- a/README-CMAKE
+++ b/README-CMAKE
@@ -17,6 +17,9 @@ NOTE:
   
   The msvc-2003 build files are deprecated and will not be supported after v0.26.
   
+  Exiv2 will not build on MinGW (neither 32bit nor 64bit)
+  This is discussed in TODO-CMAKE
+  
 Robin Mills
 robin@clanmills.com
 2016-09-23
diff --git a/TODO-CMAKE b/TODO-CMAKE
index 596a5fa6..0f6c7226 100644
--- a/TODO-CMAKE
+++ b/TODO-CMAKE
@@ -9,10 +9,52 @@
 
 Current Status
 
-ToDo: * CMake/MinGW is not working.
-        See config/buildserver/dailyBuild.sh for explanation.
-
+ToDo: * CMake/MinGW is not working.  I hope to fix this for v0.26
+        
+        # Reasons why I can't get cmake to work:
+        #
+        # 1) Even although gcc is on the path, we must tell cmake not to use /c/MinGW/bin/gcc)
+        # 2) It's using the wrong headers.  Needs /c/Qt/Qt5.6.0/Tools/mingw492_32/i686-w64-mingw32/include
+        #    cmake -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX=$dist -DEXIV2_ENABLE_NLS=OFF \
+        #                              -DCMAKE_C_COMPILER=$(which gcc) -DCMAKE_CXX_COMPILER=$(which g++) \
+        #                             "-DCMAKE_CXX_FLAGS=-I/c/Qt/Qt5.6.0/Tools/mingw492_32/i686-w64-mingw32/include"
+        #                              $exiv2
+        # 3) even so, it errors instantly on:
+        #    In file included from c:/Qt/Qt5.6.0/Tools/mingw492_32/i686-w64-mingw32/include/stddef.h:7:0,
+        #      from c:/Qt/Qt5.6.0/Tools/mingw492_32/lib/gcc/i686-w64-mingw32/4.9.2/include/stddef.h:1,
+        #      from C:/MinGW/msys/1.0/home/rmills/gnu/exiv2/trunk/xmpsdk/include/XMP_Const.h:14,
+        #      from C:/MinGW/msys/1.0/home/rmills/gnu/exiv2/trunk/xmpsdk/src/XMPCore_Impl.hpp:13,
+        #      from C:/MinGW/msys/1.0/home/rmills/gnu/exiv2/trunk/xmpsdk/src/ExpatAdapter.cpp:10:
+        #      c:/Qt/Qt5.6.0/Tools/mingw492_32/i686-w64-mingw32/include/crtdefs.h:26:9: error: 'size_t' does not name a type
+        #        typedef size_t rsize_t;
+        # 4) Building cmake itself required setting CC CXX CXXFLAGS and LDFLAGS
+        #    AND editing a system file in Qt with an erroneous #pragma error NTDDI_VERSION and _WIN32_WINNT
+        #    In file included from c:/Qt/Qt5.6.0/Tools/mingw492_32/i686-w64-mingw32/include/windows.h:10:0,
+        #      from c:/Users/rmills/gnu/cmake/cmake-3.6.2/Utilities/cmlibarchive/libarchive/archive_windows.h:74,
+        #      from c:/Users/rmills/gnu/cmake/cmake-3.6.2/Utilities/cmlibarchive/libarchive/archive_platform.h:60,
+        #      from c:/Users/rmills/gnu/cmake/cmake-3.6.2/Utilities/cmlibarchive/libarchive/xxhash.c:35:
+        #      c:/Qt/Qt5.6.0/Tools/mingw492_32/i686-w64-mingw32/include/sdkddkver.h:186:2: error: #error NTDDI_VERSION and _WIN32_WINNT mismatch!
+        #    My work-around was to comment off the #error statement!
+        
+        CMake generates the wrong include response files.
+        
+        On my system, these should have the code:
+        -IC:/MinGW/msys/1.0/home/rmills/gnu/exiv2/trunk/src
+        -IC:/MinGW/msys/1.0/home/rmills/gnu/exiv2/trunk/include
+        -IC:/MinGW/msys/1.0/home/rmills/gnu/exiv2/trunk/include/exiv2
+        -IC:/MinGW/msys/1.0/home/rmills/gnu/exiv2/trunk/build
+        -IC:/MinGW/msys/1.0/home/rmills/gnu/exiv2/trunk/xmpsdk/include
+        -IC:/MinGW/msys/1.0/home/rmills/gnu/exiv2/trunk/xmpsdk/src
+        -IC:/Qt/Qt5.6.0/Tools/mingw492_32/i686-w64-mingw32/include
+        -IC:/Qt/Qt5.6.0/Tools/mingw492_32/lib/gcc/i686-w64-mingw32/4.9.2/include
+        -IC:/MinGW/msys/1.0/local/include 
+        
+        Even with this correction, the build fails.
+        
+        I put the correct include code into includes.rsp and find to propagate it to the wrong files.         
+        /home/rmills/gnu/exiv2/trunk/build> find . -name "includes_*.rsp" -exec cp includes.rsp {} \;        
+        
 Robin Mills
 robin@clanmills.com
-2016-09-29
+2016-09-30