== Compiling using MingGW-w64 for both 32-bit and 64-bit ==
[wiki:UsersWikiWinCompile Back to Compiling in Windows]

== 1. Installing Minimalist GNU for Windows-w64 (MinGW-w64) ==
The objective will be to try to use the MingGW-w64 toolchain instead of the standard MingW since it has support for both 32-bit and 64-bit compiling.
Note: We are not successful yet, but just writing down our steps as we go along.

Details of the prefixes of files can be found at [http://sourceforge.net/apps/trac/mingw-w64/wiki/download%20filename%20structure What to download]

MingW-w64 site is [http://mingw-w64.sourceforge.net]

 * If you are on 64-bit Windows download one of the binary packages from [http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Automated%20Builds/] with name
starting with '''mingw-w64-1.0-bin_i686-mingw_'''

 * If you are on 32-bit Windows download one of the binary packages from [http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Automated%20Builds/] with name starting with
'''mingw-w32-1.0-bin_i686-mingw_''' (for my purposes I used mingw-w32-1.0-bin_i686-mingw_20110408.zip) and for native 64-bit (currently using mingw-w64-1.0-bin_i686-mingw_20110516)

 * Extract your respective zip into a folder called C:\mingw_w64 or c:\mingw_w32
 * Add c:\mingw_w64\bin (or c:\mingw_w32\bin) to your windows environment path variable in System Control Panel Advanced Settings -- PATH


Geos fails to link if it picks up 32-bit dlls so to overcome this, I copied over the dlls from windows/sytem32 and renamed them as
described in 
#linking errors seems to be caused by as described here [http://www.gaia-gis.it/spatialite-3.0.0-BETA/mingw64_how_to.html#env]
mingw64 is picking up the 32-bit dlls from syswow64 instead of the 64-bit dlss from windows/system32
I only needed to copy ws2_32.dll for geos to compile without errors
Others may be needed not sure.
with windows explorer copy the files from windows/system32

{{{
ws2_32.dll
}}}

To your folder: C:\mingw\mingw64\x86_64-w64-mingw32\lib
and then rename them adding a lib extensions so you have
{{{
libws2_32.dll
# don't think these ones are needed , libkernel32.dll, libadvapi32.dll, libmscvrt.dll, libuser32.dll
}}}

== 2. Installing Msys ==

MSys is 32-bit but you can use it with your 32-bit or 64-bit mingw-w64.  Instructions are here [http://sourceforge.net/apps/trac/mingw-w64/wiki/MSYS mingw-w64 with MSYS] and repeated
here for completeness

 *  download [http://sourceforge.net/projects/mingw-w64/files/External%20binary%20packages%20%28Win64%20hosted%29/MSYS%20%2832-bit%29/ Msys] MSYS-20110309.zip (update there is now a newer MSYS -- MSYS-20110526.zip)
 * Extract into a folder called C:\Msys
 * launch msys.bat
 * type

{{{
sh /postinstall/pi.sh
}}}

When prompted type in 
{{{C:/mingw_w64/mingw}}} or {{{C:/mingw_w32/mingw}}}  depending on which tool chain you chose
Once done, type logout and the console should exit.

== 3a. Installing Autoconf, Automake and Libtool ==
Relaunch C:\mysy\msys.bat

Verify which versions of these you have with

autoconf --version 

etc.

If they are not newer (or you get not found) than below then download and install.
Download the source code from the GNU site and save to c:\projects

 * http://ftp.gnu.org/gnu/autoconf/autoconf-2.65.tar.gz
 * http://ftp.gnu.org/gnu/automake/automake-1.11.1.tar.gz
 * http://ftp.gnu.org/gnu/libtool/libtool-2.4.tar.xz


{{{
cd /c/projects
tar -xvf autoconf-2.65.tar.gz
cd autoconf-2.65
./configure --build=i686-w64-mingw32 --host=i686-w64-mingw32 --target=i686-w64-mingw32 (if you are building for 64-bit then use --host=x86_64-w64-mingw32)
make && make install
autoconf --version
}}}

repeat same exercise for automake

For libtool
unzip tar -xvf libtool-2.4.10.tar.gz with 7zip into projects folder
{{{
cd /c/projects

cd libtool-2.4
./configure --host=x86_64-w64-mingw32 --disable-shared 
#if you are building on 32-bit then use --host=i686-w64-mingw32 for the host
make clean && make && make install
libtool --version

}}}

== 3.b create project folders ==

{{{
 cd /c/projects
 mkdir pg
 mkdir postgresql
 mkdir geos
 mkdir proj
 ls

}}}

== GDAL ==
{{{
cd /c/projects
mkdir gdal
cd gdal
wget http://download.osgeo.org/gdal/gdal-1.9.0.tar.gz
tar xvfz gdal-1.9.0.tar.gz
cd gdal-1.9.0

./configure --host=x86_64-w64-mingw32 --build=x86_64-w64-mingw32 --with-threads=no --prefix=/c/projects/gdal/rel-1.9.0w64 
make && make install
cd /c/projects/gdal/rel-1.9.0w64/bin
strip *.dll
}}}

== 4. Compiling GEOS ==

Download latest GEOS source from http://trac.osgeo.org/geos/ either the http://download.osgeo.org/geos/geos-3.3.2.tar.bz2
You can also use the trunk svn version https://svn.osgeo.org/geos/trunk. If you are using svn version, make sure to run:

{{{
sh autogen.sh
}}}


this fails at linker phase with a whole bunch of errors if you compile without doing
#linking errors seems to be caused by as described here [http://www.gaia-gis.it/spatialite-3.0.0-BETA/mingw64_how_to.html#env]
mingw64 is picking up the 32-bit dlls from syswow64 instead of the 64-bit dlss from windows/system32
I may have over-copied, but to remedy before evening starting configure
with windows explorer copy the files from windows/system32

{{{
ws2_32.dll, kernel32.dll, advapi32.dll, mscvrt.dll, user32.dll
}}}

To your folder: C:\mingw\mingw64\x86_64-w64-mingw32\lib
and then rename them adding a lib extensions so you have
{{{
libws2_32.dll, libkernel32.dll, libadvapi32.dll, libmscvrt.dll, libuser32.dll
}}}

# hack described in [http://www.gaia-gis.it/spatialite-3.0.0-BETA/mingw64_how_to.html#libgeos]

{{{
simplify/.libs/libsimplify.a(TopologyPreservingSimplifier.o):TopologyPreservingS
implifier.cpp:(.rdata+0x1f0): undefined reference to `geos::geom::util::GeometryTransformer::transformGeometryCollection(geos::geom::GeometryCollection const*,
geos::geom::Geometry const*)'

and bunch of other classes in util::GeometryTransformer..
the .la file gets created so seems to be at linker phase.
}}}

-- follow instructions in [http://www.gaia-gis.it/spatialite-3.0.0-BETA/mingw64_how_to.html#libgeos]
{{{
cd /c/projects/geos
tar xjf geos-3.3.3.tar.bz2
cd geos-3.3.3
./configure --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --prefix=/c/projects/geos/rel-3.3.3w64 | tee /c/geos_configure_3.3.log 
make
make install
}}}
To strip all the debug info weight from the libgeos DLL files, run
{{{
strip /c/projects/bin/geos/rel-3.3.3/*.dll
}}}

==  Installing !LibIconv ==

For iconv we are going to compile our own copy instead of installing from GNUWin.

 * http://ftp.gnu.org/gnu/libiconv/libiconv-1.13.1.tar.gz

Save the source in your C:\projects directory. Open up the MSYS terminal. Ignore the errors in the configure process.
{{{
cd /c/projects
tar xvfz libiconv-1.13.1.tar.gz
cd libiconv-1.13.1
./configure --host=x86_64-w64-mingw32 --build=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --prefix=/c/projects/rel-libiconv-1.13.1w64
make
make install
}}}
Copy rel-.. contents int c:\mingw\mingw64 folder.  For some reason using libiconv-prefix did not work for configuring postgis. 
Verify if the version of iconv you are running is the same as the one you just compiled (1.13):
{{{
# iconv --version
}}}

== Compiling Proj ==
Download  Proj4 from the web site, and the datum shifts grid file.

    *  http://download.osgeo.org/proj/proj-4.7.0.tar.gz
    *  http://download.osgeo.org/proj/proj-datumgrid-1.5.zip 

and copy to c:\projects\proj
The datum grid file must be unzipped into the "nad" subdirectory of the Proj4 source tree.
{{{

 cd /c/projects/proj
 wget http://download.osgeo.org/proj/proj-4.7.0.tar.gz
 wget http://download.osgeo.org/proj/proj-datumgrid-1.5.zip 
 tar xvfz proj-4.7.0.tar.gz
 cd proj-4.7.0
 cd nad
 unzip ../../proj-datumgrid-1.5.zip
 cd ..
}}}

Apply mutex patch in http://trac.osgeo.org/proj/ticket/72 to src/pj_mutex.c
{{{
#if you are building for 64-bit then use x86_64-w64-mingw32 for the build,host,target
#32 bit uses i686-w64-mingw32 for build, host, target
 ./configure --prefix=/c/projects/proj/rel-4.7.0w64 --host=x86_64-w64-mingw32 --build=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --enable-shared --disable-static

 make
 make install
}}}
 
Seems to give an error on make install (when trying to copy over the nad folder), but generates files in rel-4.7.0. 
Have to copy the nad folder manually.  The .dll file is strangely called libproj-0.dll. of libproj.dll.  Oh well.

== Compiling and Installing C-Unit ==
Download from http://sourceforge.net/projects/cunit/ into c:\projects

{{{
cd /c/projects
wget http://iweb.dl.sourceforge.net/project/cunit/CUnit/2.1-2/CUnit-2.1-2-src.tar.bz2
tar -xvf CUnit-2.1-2-src.tar.bz2
cd CUnit-2.1.2
#if you are building for 64-bit then use x86_64-w64-mingw32 for the build,host,target
#32 bit uses i686-w64-mingw32 for build, host, target
./configure --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32
make && make install
}}}
== 7. Compiling LibXML2 ==

{{{
mkdir /c/projects/libxml
cd /c/projects/libxml
wget ftp://xmlsoft.org/libxml2/libxml2-2.7.8.tar.gz 
}}}


{{{
 tar xvfz libxml2-2.7.8.tar.gz 
cd libxml2-2.7.8
#if you are building for 64-bit then use x86_64-w64-mingw32 for the build,host,target
#32 bit uses i686-w64-mingw32 for build, host, target
 ./configure --prefix=/c/projects/libxml/rel-libxml2-2.7.8w64 --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --enable-shared CFLAGS=-O2
#Note to self: used to have CCFLAGS=LDFLAGS="-Wl,-static"  in here will see how it goes without
 make
 make install
}}}

You might get an error during the configure process
{{{
/bin/rm: cannot lstat `libtoolT': No such file or directory
}}}

That error seems safe to ignore.

== 8. Compiling PostgreSQL 9.1 ==
Download source from:
[http://ftp.postgresql.org/pub/source/v9.1.3/postgresql-9.1.3.tar.bz2]

{{{
mkdir /c/projects/pgx64
cd postgresql
tar -xvjf postgresql-9.1.3.tar.bz2
cd postgresql-9.1.3
#if you are building for 64-bit then use x86_64-w64-mingw32 for the build,host,target
#32 bit uses i686-w64-mingw32 for build, host, target
#EnterpriseDb VC++ 64-bit builds are compiled with disable float8 by val. 
#If we don't include this line, the modules compiled against mingw64 will be incompatible with edb builds
./configure --prefix=/c/projects/pgx64/pg91 \
 --build=x86_64-w64-mingw32 \
 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 \
 --with-pgport=8441 --enable-cassert --enable-debug \
 --enable-integer-datetimes --disable-float8-byval --without-zlib

 make
 make install
#initialize the database cluster
/c/projects/pgx64/pg91/bin/initdb -U postgres -D /c/projects/pgx64/pg91/data -A trust
}}}

== Compiling JSON-C ==
This is needed if you want ST_GeomFromGeoJSON to be functional. 
Download [http://oss.metaparadigm.com/json-c/json-c-0.9.tar.gz] and save to c:\projects\json-c
{{{
cd /c/projects/json-c
tar xvfz json-c-0.9.tar.gz
cd json-c-0.9
## had to compile with -w (disable warnings otherwise it gave errors
./configure --build=x86_64-w64-mingw32 \
 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 \
 --prefix=/c/projects/json-c/rel-0.9w64 CFLAGS=-w
make clean
make
make install
}}}
== Copy over needed dlls to PostgreSQL folders ==

{{{
export PATHOLD=$PATH
export PATH=$PATH:/c/projects/pgx64/pg91edb/bin:/mingw
export PGHOST=localhost
export PGPORT=5441
export PGUSER=postgres
cp /c/projects/geos/rel-3.3.3w64/bin/*.dll /c/projects/pgx64/pg91edb/bin
cp /c/projects/gdal/rel-1.9.0w64/bin/*.dll /c/projects/pgx64/pg91edb/bin
cp /c/projects/proj/rel-4.7.0w64/bin/*.dll  /c/projects/pgx64/pg91edb/bin
cp /c/mingw/mingw64/bin/libgcc_s_sjlj-1.dll /c/projects/pgx64/pg91edb/bin
cp /c/projects/geos/rel-3.3.3w64/bin/*.dll /c/projects/pgx64/pg91/bin
cp /c/projects/gdal/rel-1.9.0w64/bin/*.dll /c/projects/pgx64/pg91/bin
cp /c/projects/proj/rel-4.7.0w64/bin/*.dll  /c/projects/pgx64/pg91/bin
cp /c/mingw/mingw64/bin/libgcc_s_sjlj-1.dll /c/projects/pgx64/pg91/bin
}}}


== Compiling PostGIS 2.0 ==

{{{
cd /c/projects
mkdir postgis
cd postgis
wget http://www.postgis.org/download/postgis-2.0.0beta2SVN.tar.gz
tar xvf postgis-2.0.0beta2SVN
cd postgis-2.0.0beta2SVN
CPPFLAGS="-I/c/projects/pgx64/pg91/include" LDFLAGS="-L/c/projects/pgx64/pg91/lib" ./configure \
 --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 \
  --with-xml2config=/c/projects/libxml/rel-libxml2-2.7.8w64/bin/xml2-config \
  --with-pgconfig=/c/projects/pgx64/pg91/bin/pg_config \
  --with-geosconfig=/c/projects/geos/rel-3.3.3vcc64/bin/geos-config \
  --with-projdir=/c/projects/proj/rel-4.7.0w64 \
  --with-gdalconfig=/c/projects/gdal/rel-1.9.0w64/bin/gdal-config \
  --with-jsondir=/c/projects/json-c/rel-0.9w64 \
  --with-libiconv=/c/projects/rel-libiconv-1.13.1w64
}}}

#this part is a hack, but again didn't work without it
#you can try without doing this, but if you get errors about 
# conflicting type def boolean during PostGIS compile, you need this.
#In my case I got this:
{{{
In file included from c:/projects/json-c/rel-0.9w64/include/json/json_util.h:1

                 from c:/projects/json-c/rel-0.9w64/include/json/json.h:23,
                 from lwgeom_in_geojson.c:31:
c:/projects/json-c/rel-0.9w64/include/json/json_object.h:32: error: conflictin
types for 'boolean'
c:\mingw\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/4.4.7/../../../../x86_64-w6
mingw32/include/rpcndr.h:52: note: previous declaration of 'boolean' was here
make[1]: *** [lwgeom_in_geojson.o] Error 1
}}}

 * Open up /c/projects/json-c/rel-0.9/include/json/json_object.h
 * remark out line 32 that reads
    {{{ typedef int boolean }}}
 * so it should now read 
    {{{ /** typedef int boolean; **/ }}}
 * During the PostGIS configure process, you have to put this back the way it was otherwise configure complains json.h or something is not usable and refuses to configure with JSON-C support. Then you remark the line out again during compile.  Crazy I know, but json-c won't compile without that line so can't take it out before json-c compile.

If you run into problems with your build, pipe the output into a file for further analysis. The GUI requires that pkg-config be on your PATH, check that it is there by running 'which pkg-config'.
{{{
make 2>&1 | tee /c/build.log
make check
make install
}}}