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POConnect iPhone App to PostgreSQL Using Libpq
 

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    <p>I need to create an application for the iPhone that will connect to a PostgreSQL 8.4 database using libpq. The problem is I can't get a simple iPhone that links to libpq to compile. I am however able to get the equivalent application that is a regular Mac desktop app to compile and connect to PostgreSQL without any issues. I'm on Xcode 3.2 running on Snow Leopard.</p> <p>I'm building libpq for both arm and for x86_84. The arm build is for the real iPhone and the x86_64 is for the iPhone simulator to use. I then create a fat binary that contains both files and end up with a file named libpq. This file is the one I use in the regular Mac app and it works fine and causes issues when trying to build the iPhone app.</p> <p>Here is my build script when I build libpq.</p> <pre><code>#!/bin/bash DEVROOT=/Developer/Platforms/iPhoneOS.platform/Developer SDKROOT=$DEVROOT/SDKs/iPhoneOS3.0.sdk rm -rf /Users/bob/mylibs mkdir /Users/bob/mylibs #Store there compiled libs make clean #Build ARM library ./configure --host=arm-apple-darwin --without-readline --disable-ipv6 CC=$DEVROOT/usr/bin/arm-apple-darwin9-gcc-4.0.1 CPPFLAGS="-I$SDKROOT/usr/lib/gcc/arm-apple-darwin9/4.0.1/include/ -I$SDKROOT/usr/include/" CFLAGS="$CPPFLAGS -arch armv6 -pipe -no-cpp-precomp -isysroot $SDKROOT" CPP="$DEVROOT/usr/bin/cpp $CPPFLAGS" LD=$DEVROOT/usr/bin/ld make -C src/interfaces/libpq cp /Users/bob/Downloads/postgresql-8.4.1/src/interfaces/libpq/libpq.a /Users/bob/mylibs/libpq.arm #Then build i386 library make clean &amp;&amp; ./configure &amp;&amp; make -C src/interfaces/libpq cp src/interfaces/libpq/libpq.a /Users/bob/mylibs/libpq.i386 #Then make fat binary $DEVROOT/usr/bin/lipo -arch armv6 /Users/bob/mylibs/libpq.arm -arch x86_64 /Users/bob/mylibs/libpq.i386 -create -output /Users/bob/mylibs/libpq </code></pre> <p>Here is the build log when I try to compile the iPhone app from within Xcode.</p> <pre><code>Build iPhonePg of project iPhonePg with configuration Debug Ld build/Debug-iphonesimulator/iPhonePg.app/iPhonePg normal i386 cd /Users/bob/Documents/Programming/PragProgrammerIphoneSDK/iPhonePg setenv MACOSX_DEPLOYMENT_TARGET 10.5 setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk -L/Users/bob/Documents/Programming/PragProgrammerIphoneSDK/iPhonePg/build/Debug-iphonesimulator -L../../../../mylibs -L/Users/bob/Documents/Programming/PragProgrammerIphoneSDK/iPhonePg -L/Users/bob/Documents/Programming/PragProgrammerIphoneSDK/iPhonePg/../../../../mylibs -F/Users/bob/Documents/Programming/PragProgrammerIphoneSDK/iPhonePg/build/Debug-iphonesimulator -filelist /Users/bob/Documents/Programming/PragProgrammerIphoneSDK/iPhonePg/build/iPhonePg.build/Debug-iphonesimulator/iPhonePg.build/Objects-normal/i386/iPhonePg.LinkFileList -mmacosx-version-min=10.5 -framework Foundation -framework UIKit -framework CoreGraphics /Users/bob/Documents/Programming/PragProgrammerIphoneSDK/iPhonePg/libpq -o /Users/bob/Documents/Programming/PragProgrammerIphoneSDK/iPhonePg/build/Debug-iphonesimulator/iPhonePg.app/iPhonePg ld: warning: in /Users/bob/Documents/Programming/PragProgrammerIphoneSDK/iPhonePg/libpq, missing required architecture i386 in file Undefined symbols: "_PQclear", referenced from: -[iPhonePgAppDelegate applicationDidFinishLaunching:] in iPhonePgAppDelegate.o "_PQerrorMessage", referenced from: -[iPhonePgAppDelegate applicationDidFinishLaunching:] in iPhonePgAppDelegate.o "_PQconnectdb", referenced from: -[iPhonePgAppDelegate applicationDidFinishLaunching:] in iPhonePgAppDelegate.o "_PQfinish", referenced from: -[iPhonePgAppDelegate applicationDidFinishLaunching:] in iPhonePgAppDelegate.o "_PQstatus", referenced from: -[iPhonePgAppDelegate applicationDidFinishLaunching:] in iPhonePgAppDelegate.o "_PQexec", referenced from: -[iPhonePgAppDelegate applicationDidFinishLaunching:] in iPhonePgAppDelegate.o ld: symbol(s) not found collect2: ld returned 1 exit status </code></pre> <p>Anyone else run into this that can help out? </p> <p>Thanks StartShip3000</p>
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