View source for Build Qt 5 PostgreSQL Plugin for Android

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= Overview =

Building postgresql plugin is pretty straight forward.

If you don't want to build them yourself you can download the plugin here[https://drive.google.com/open?id=0ByPpOAN5EsHKfmgwRTFvQUl5Z1NvUnlYMHptTEs0d2xEc24xZ19Jb0ZDMTBpb3JDQ014ZkU]. All you need to do is copy libqsqlpsql.so into /path/to/qt/android_armv7/plugins/sqldrivers/. It's statically linked to libpq!

= Setting up Enviroment Variables =

Compiling only libpq should work fine with android-9 which is what qt-android is currently compiled with.
<code>export ANDROID_NDK_ROOT="/path/to/android/ndk"
SR="$ANDROID_NDK_ROOT/platforms/android-9/arch-arm"
BR="$ANDROID_NDK_ROOT/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-"</code>

= Downloading =

Posgresql source can be downloaded from http://www.postgresql.org/ftp/source/ These instructions are only tested on the 9.4.1. Once downloaded extract.

= Building =

cd into the postgresql directory and run configure

<code>STRIP="$BR"strip RANLIB="$BR"ranlib OBJDUMP="$BR"objdump AR="$BR"ar CC="$BR"gcc CFLAGS=—sysroot=$SR CPP="$BR"cpp CPPFLAGS=$CFLAGS \
./configure —prefix=$SR/usr —host=arm-linux-androideabi —target=arm-linux-androideabi —build="$CHOST" —without-readline</code>

Since android requires that .so files end in .so and not with a version number copy and replace two things in src/Makefile.shlib

"lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)" with "lib$(NAME)$(DLSUFFIX)" and "lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)" with "lib$(NAME)$(DLSUFFIX)"

<code>sed -e 's/lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION).$(SO_MINOR_VERSION)/lib$(NAME)$(DLSUFFIX)/g' -i src/Makefile.shlib
sed -e 's/lib$(NAME)$(DLSUFFIX).$(SO_MAJOR_VERSION)/lib$(NAME)$(DLSUFFIX)/g' -i src/Makefile.shlib</code>

Next run make. For the driver we only need libpq.

<code>make -C src/interfaces/libpq</code>

= Building the plugin =

Next download the source for Qt 5 if you don't have it. We only need base http://download.qt.io/archive/qt/5.4/5.4.1/submodules/qtbase-opensource-src-5.4.1.tar.xz After downloading and extracting cd into "qtbase-opensource-src-5.4.1/src/plugins/sqldrivers/psql/"

Run qmake followed by make
<code>qmake "INCLUDEPATH+=/path/to/postgresql-9.4.1/src/interfaces/libpq /path/to/postgresql-9.4.1/src/include" "LIBS+=-L/path/to/postgresql-9.4.1/src/interfaces/libpq/ -lpq"
make install</code>

= Build your Android App =

Finally to build your android app you'll need to add libpq.so. Add this line to your .pro file
<code>ANDROID_EXTRA_LIBS=/path/to/postgresql-9.4.1/src/interfaces/libpq/libpq.so</code>