I'm developing an iPhone application and I'm kind of new to everything. I'm working on Mountain Lion OS X 10.8 and using xCode v4.5. I need JPEG handling capabilities in my project and I want to use the libjpeg (http://www.ijg.org/) library. I have tried a few different approaches, but being a bit naive, I'm not really sure how to begin. After downloading packages I've made usual ./configure; make and make install. Right now I have (jconfig.h, jerror.h, jmorecfg.h, jpeglib.h) under (/usr/local/include) and (libjpeg.a, libjpeg.la) under (/usr/local/lib) but I have no idea how to link/use this in my xCode project.
Can anyone link me to a tutorial or give me a push in the right direction?
If anyone successfully installed and used jpeg library please help..
This is a bit of a pain, because you will need to compile LibJPEG for two architectures: ARM, for iOS, and x86, for the simulator.
Your best bet is to use NSImage or CGImage. There already is a JPEG library on iOS, supplied with the system, so you don't need to use LibJPEG.
An alternative is to put the LibJPEG sources directly into your project (including the *.c files). This way, they will be built correctly for different architectures (simulation and deployment).
You could also just build for ARM, and then forget about running the simulator.
Or you could build LibJPEG as a fat binary by compiling it twice and combining the resulting library (libjpeg.a) from each compilation with libtool.
libtool -static path/to/arm/libjpeg.a path/to/x86/libjpeg.a -o libjpeg.a
You can see why the recommendation is to use NSImage or CGImage. Better to use a library that is already installed rather than try to build and install a new one.
How to make a fat static library
Since it sounds like you want to do things the hard way, here is an example of how to build a fat static library for i386 and ppc architectures. This was done on a PowerPC OS X box, you will have to adjust if you want to compile for ARM and i386.
Note that you have to specify --host and --build for cross-compiling. The values below are correct for my computer, but I am certain that they are wrong for your computer.
$ cd jpeg-8d
$ mkdir build-ppc build-i386
$ cd build-ppc
$ ../configure CFLAGS='-arch ppc -O2 -g' LDFLAGS='-arch ppc' \
--enable-static --disable-shared
$ make -j2
$ cd ../build-i386
$ ../configure CFLAGS='-arch i386 -O2 -g' LDFLAGS='-arch i386' \
--enable-static --disable-shared \
--build=powerpc-apple-darwin9.8.0 --host=i386-apple-darwin9.8.0
$ make -j2
$ cd ..
$ file build-ppc/.libs/libjpeg.a
build-ppc/.libs/libjpeg.a: current ar archive random library
$ file build-i386/.libs/libjpeg.a
build-i386/.libs/libjpeg.a: current ar archive random library
$ libtool -static build-*/.libs/libjpeg.a -o libjpeg.a
$ file libjpeg.a
libjpeg.a: Mach-O universal binary with 2 architectures
libjpeg.a (for architecture i386): current ar archive random library
libjpeg.a (for architecture ppc): current ar archive random library
Related
Alright guys, I posted a similar question and took it down because it wasn't specific enough so here I go. From the zip file of Freetype 2.6.5 I have not been able to create an Xcode project that will compile the library for iOS use, only for i386_64.
I tried the commands here but I don't get past the first commands the and I am getting this
FreeType build system -- automatic system detection
The following settings are used:
platform unix compiler cc
configuration directory ./builds/unix configuration rules
./builds/unix/unix.mk
If this does not correspond to your system or settings please remove
the file `config.mk' from this directory then read the INSTALL file
for help.
Otherwise, simply type
/Applications/Xcode.app/Contents/Developer/usr/bin/make' again to
build the library, or
/Applications/Xcode.app/Contents/Developer/usr/bin/make refdoc' to
build the API reference (this needs python >= 2.6).
cd builds/unix; \
./configure 'CFLAGS=-arch i386' /bin/sh: ./configure: No such file or directory make: *** [setup] Error 127
I also followed the instructions inside the cmakelists.txt that it comes inside the project but still nothing, I still get an xcode project for osx and not for IOS which is giving me a plethora of linking errors. Here is the instructions for your reference.
For an iOS static library, use
#
cmake -D IOS_PLATFORM=OS -G Xcode
#
or
#
cmake -D IOS_PLATFORM=SIMULATOR -G Xcode
I am not sure what else to do. Any help?
Here's an outline of the basic build process to compile the FreeType libaries for iOS:
Download the latest FreeType source code
Extract the archive and cd into the unarchived directory
Setup toolchain and export variables for the architectures desired (arm64, arm7, i386, x86_64)
Compile the source code and build the libraries
For example, the build commands for arm64 might look something like this:
$ export CC="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
$ iphoneos="7.0" # target version of iOS
$ ARCH="arm64" # architecture (arm64, arm7, i386, x86_64)
$ export CFLAGS="-arch ${ARCH} -pipe -mdynamic-no-pic -Wno-trigraphs -fpascal-strings \
-O2 -Wreturn-type -Wunused-variable -fmessage-length=0 -fvisibility=hidden \
-miphoneos-version-min=$iphoneos -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/libxml2 \
-isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk"
$ export AR="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar"
$ export LDFLAGS="-arch ${ARCH} -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk \
-miphoneos-version-min=7.0"
$ ./configure --host="aarch64-apple-darwin" --enable-static=yes --enable-shared=no
$ make
$ clean
It's a bit of work to construct the commands for each arch, but
fortunately there's a build
script
— which automatically downloads, extracts, and builds the latest FreeType (2.6.5 currently).
To run the script just use the following command in Terminal:
./build_freetype.sh
The resulting iOS libraries can be found in ~/Desktop/FreeType_iOS_Release when it completes.
I am getting a library not found error building GraphViz current release (June 7 2012) with Xcode 4.3 using a script. I may have made mistakes updating build scripts from other people's successful recipes for the new location of Xcode4.3 and the developer tools in the Applications folder.
ld: library not found for -lcrt1.10.6.o
(doing this from memory so exact number on the CRT lib may be wrong)
Am also a little lost also how I would incorporate this into an Xcode build in the IDE. I am a very experienced programmer but having trouble finding my way around Xcode 4 at times. (Decades of Visual Studio et al).
I have copied the instructions from this earlier question and adapted
#!/bin/sh
# For iPhoneOS, see http://clang.llvm.org/ for options
export DEV_iOS=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer
# was /Developer/Platforms/iPhoneOS.platform/Developer
export SDK_iOS=${DEV_iOS}/SDKs/iPhoneOS5.1.sdk
export COMPILER_iOS=${DEV_iOS}/usr/bin
export CC=${COMPILER_iOS}/clang
export CXX=${COMPILER_iOS}/clang++
export LDFLAGS="-arch armv7 -pipe -Os -gdwarf-2 -mthumb -isysroot ${SDK_iOS}"
export CFLAGS="${LDFLAGS}"
export OBJCFLAGS="${LDFLAGS}"
export CXXFLAGS="${LDFLAGS} -fvisibility-inlines-hidden"
export LD=${COMPILER_iOS}/ld
export CPP=${COMPILER_iOS}/clang
export AR=${COMPILER_iOS}/ar
export AS=${COMPILER_iOS}/as
export NM=${COMPILER_iOS}/nm
export CXXCPP="${COMPILER_iOS}/clang++"
export OBJC=${COMPILER_iOS}/clang
export RANLIB=${COMPILER_iOS}/ranlib
./configure \
--build=arm-apple-darwin11 \
--host=arm-apple-darwin11 \
--disable-dependency-tracking \
--enable-shared=no \
--enable-static=yes \
--enable-ltdl=no \
--enable-swig=no \
--enable-tcl=no \
--srcdir=${GVROOT} \
--with-codegens=no \
--with-cgraph=no \
--with-graph=yes \
--with-expat=no \
--with-fontconfig=no \
--with-freetype2=no \
--with-ipsepcola=yes \
--with-libgd=no \
--with-quartz=yes \
--with-visio=yes \
--with-x=no
The compiler normally uses crt1.o combined with crt[i/n].o and crt[begin/end].o to support the constructors and destructors (functions called before and after main and exit).
This error could be caused by this missing library file for the specific deployment target.
First, do some investigation, like:
list all your deployment targets:
ls -la /Developer/SDKs
and find which crt1 libraries do you have for which environment
find /Developer/SDKs -name crt1\*
You could see something like:
/Developer/SDKs/MacOSX10.5.sdk/usr/lib/crt1.10.5.o
/Developer/SDKs/MacOSX10.5.sdk/usr/lib/crt1.o
/Developer/SDKs/MacOSX10.6.sdk/usr/lib/crt1.10.5.o
/Developer/SDKs/MacOSX10.6.sdk/usr/lib/crt1.10.6.o
/Developer/SDKs/MacOSX10.6.sdk/usr/lib/crt1.o
So as you can see, crt1.10.6.o is missing for MacOSX10.5.
Solution 1:
You can solve that by creating the link to the missing file pointed to the other environment, or you could change your deployment target.
E.g.
ln -s /Developer/SDKs/MacOSX10.6.sdk/usr/lib/crt1.10.6.o /Developer/SDKs/MacOSX10.5.sdk/usr/lib/
Also this could be caused, that you have different gcc installed in your system. See:
which gcc;
xcrun -find gcc;
brew list | grep gcc; brew list gcc47
Solution 2
So when you're compiling using make, you can actually specify the right compiler by CC variable. E.g.
CC=/path/to/gcc-3.4 make
Solution 3
What you can also try is specifying the right target deployment environment variable for gcc, by executing the following lines:
export MACOSX_DEPLOYMENT_TARGET=10.5
export C_INCLUDE_PATH=/Developer/SDKs/MacOSX10.5.sdk/usr/include
export LIBRARY_PATH=/Developer/SDKs/MacOSX10.5.sdk/usr/lib
If this works, then you can add above lines to your shell profile (~/.profile) to make the change permanent.
How to test
Create the example conftest.c file with the following code:
#ifdef __GNUC__
yes;
#endif
And try to compile it via:
gcc conftest.c
cc conftest.c
cc conftest.cc conftest.c
Troubleshooting
To see which exactly what file is missing, try to debug it using dtruss, e.g.:
sudo dtruss -f gcc conftest.c 2>/dev/stdout | grep crt
You should see something like:
12426/0xb4e3b: stat64("/Developer/usr/lib/gcc/i686-apple-darwin10/4.2.1/crt1.10.6.o\0", 0x7FFF5FBFE780, 0xB) = -1 Err#2
So once you found the missing file, then you can follow by the first solution by linking the missing file from existing location (e.g. locate crt1.10.6.o). If you will have other missing symbols, then try another file (check the architecture before by: file `locate crt1.10.6.o`).
E.g.
sudo ln -s /Applications/Xcode.app/Contents/Developer//Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/usr/lib/crt1.10.6.o /Applications/Xcode.app/Contents/Developer/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin11/4.2.1/crt1.10.6.o
sudo ln -s /Applications/Xcode.app/Contents/Developer//Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/usr/lib/crt1.10.6.o /Applications/Xcode.app/Contents/Developer/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin11/4.2.1/x86_64/crt1.10.6.o
Related
Error in xcode project: ld: library not found for -lcrt1.10.6.o
If I remember correctly this is what fixed the library not found problem.
CFLAGS="$(OTHER_CFLAGS) -miphoneos-version-min=5.0"
LDFLAGS="$(OTHER_LDFLAGS) --miphoneos-version-min=5.0"
To link this to Xcode, under Build Settings then Header and Library search paths you need to add the paths to the built versions of the library and the header.
You can add the build script as part of your Xcode project, but I haven't had success with this, plus you should only need to build it once per version, so putting the time into anything other than a build script doesn't have much return.
If you decide to put the script in your project anyway (good luck!), then go to the build phases tab, add a build phase of type "Run Script" and paste your script there.
This may be a copy of this question How can I use the PoDoFo library for annotating PDFs on iOS? not responded yet.
i know how to use/create static libraries into xcode projects for iOS. i was looking for a free PDF library which support in memory editing of pdf documents and i came to know that PoDoFo done it very well, i tried to build this library for xcode but i really don't know how to play with CMake. can any body tell me how can i use this library into my iOS application.
thanks
This is an extract from Podofo 'Read me' file
CMake builds on Mac OS X
Mac OS X users can build PoDoFo using CMake either by generating conventional UNIX Makefiles (the "Unix Makefiles" CMake target) or generating an XCode project (the "Xcode" target). In either case the following applies.
You will need freetype and fontconfig. It's possible to omit the use of libjpeg (see the platform-independent documentation) but by default libjpeg will also be required. If you have these libraries already (say, from fink or DarwinPorts) you can skip the following section and update the CMAKE_INCLUDE_PATH and CMAKE_LIBRARY_PATH arguments appropriately.
Dependencies
I'll assume you're installing podofo and any required libraries into $HOME/libs . Adjust to taste, but keep it consistent.
The easiest way to get any required libraries is to use MacPorts to install the libjpeg, fontconfig, and freetype libraries. Once you've installed MacPorts, just run:
/opt/local/bin/port install fontconfig freetype jpeg tiff lua
MacPorts will automatically build the libraries and their dependencies, installing them in /opt/local.
If you want to distribute the libraries with your application, all you'll need to do is use install_name_tool to set appropriate relative paths for their linkage and include them in your application bundle - just like you do with any other libraries.
PoDoFo itself
You should be able to configure and install podofo on Mac OS X using:
cmake -G "Unix Makefiles" \
-DWANT_FONTCONFIG:BOOL=TRUE \
-DCMAKE_INSTALL_PREFIX=/opt/podofo \
-DCMAKE_INCLUDE_PATH=/opt/local/include \
-DCMAKE_LIBRARY_PATH=/opt/local/lib \
../podofo
make
sudo mkdir /opt/podofo
sudo chown $USER /opt/podofo
make install
change "Unix Makefiles" to "Xcode" if you want to build an XCode project instead, then instead of running make' andmake install' just open the project file and work as normal
Instead of using 'XCode' in the command, type 'Xcode', (c lowercase) and it should do the trick.
For one reason or another we need to create a custom 32-bit build of Perl 5.12.3 in /usr/local on Mac OS X Snow Leopard.
Can anyone explain the process or point us the direction of a tutorial or example?
On Snowleopard the kernel runs in 32bit mode and the userland mostly in 64bit mode. The kernel is able to run 32bit and 64bit userland apps without a problem.
You need to tell the perl build system to create a 32bit only binary. This is done by setting the -arch gcc flag.
For a simple singe file app you would do it like this:
gcc -arch i386 -o app app.m -lobjc -framework CoreFoundation -framework Cocoa
In your case you have to pass the arch flag to the build system.
Iam not a perl expert but i would configure perl like this:
./Configure -Dprefix=/usr/local -A ccflags="-arch i386"
If your system doesn't have 64bit kernel extensions turned on, then you should just be able to build Perl straight from source and pass DESTDIR=/usr/local on the make install command line. If the system is in 64bit mode, you'll need to look up how to cross-compile for i386, which isn't something I've had to do before as I just build perl for my native architecture, or install from a package.
Here's how I did it using Perlbrew:
Install Perlbrew
Make sure you have followed all of the proper steps including adding the bit to the end of .bash_profile.
Run the following (for perl 5.14.2, with threading. Adjust as necessary for other perl versions and options) (Thanks to WildPerl for this bit of wisdom):
perlbrew install 5.14.2 -ders -Dusethreads -Duseithreads -Accflags="-arch i386" -Accflags="-B/Developer/SDKs/MacOSX10.6.sdk/usr/include/gcc" -Accflags="-B/Developer/SDKs/MacOSX10.6.sdk/usr/lib/gcc" -Accflags="-isystem/Developer/SDKs/MacOSX10.6.sdk/usr/include" -Accflags="-F/Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks" -Accflags="-mmacosx-version-min=10.5" -Aldflags="-arch i386 -Wl,-search_paths_first" -Aldflags="-Wl,-syslibroot,/Developer/SDKs/MacOSX10.6.sdk" -Aldflags="-mmacosx-version-min=10.5" -Alddlflags="-arch i386 -Wl,-search_paths_first" -Alddlflags="-Wl,-syslibroot,/Developer/SDKs/MacOSX10.6.sdk" -Alddlflags="-mmacosx-version-min=10.5" -Duseshrplib
If you have a newer version of Xcode with the Developer SDKs as part of the app bundle, you'll need to create a symlink to them from /Developer:
sudo ln -s /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/ /Developer
Install the local copy of cpanm:
perlbrew install-cpanm
After that finishes, go to the place where perlbrew installed perl (on my system that is: ~/perl5/perlbrew/perls/perl-5.14.2/lib/5.14.2/darwin-thread-multi-2level/ and edit Config.pm to change this line:
cc => 'cc',
to this:
cc => 'cc -m32',
I've searched a lot, but didn't find the solution.
I need to package my ios app into .deb.
I have installed Mac Ports and dpkg, I have control file in DEBIAN folder in MyApp folder
I run /opt/local/bin/dpkg-deb -b MyApp and get error.
dpkg-deb: ignoring 3 warnings about the control file(s)
Can't use format gnu: No such format 'gnu': Invalid argument
There is another topic: How to create .deb packages on Mac OS X, but no answer to this question.
I assume you are using a tar implementation that does not support the GNU tar fotrmat, which dpkg-deb expects for its usage.
You should install GNU tar and either recompile dpkg to use that (usually named gtar) instead of simply the executable tar, or prepare a PATH environment to prefer the GNU tar when using dpkg-deb.
Newer dpkg versions detect this requirement at build time and will abort the build, to make sure this does not happen.