To build GPAC for iOS, we'll first need to cross-compile some dependencies, before building the project itself.

For the following, we'll call the working directory <GPAC_ROOT_DIR>.

Building dependencies

Get the code

##get src
git clone https://github.com/gpac/gpac.git gpac_public

##get deps
git clone https://github.com/gpac/deps_ios
cd deps_ios
git submodule update --init --recursive --force --checkout

We need to keep the gpac_public for the main repository to have the scripts run smoothly.

Build dependencies

From the deps_ios folder:

cd build/xcode_ios
./generate_extra_libs.sh

Copy dependencies

Then continuing from the build/xcode_ios folder:

cd ../..
./CopyLibs2Public4iOS.sh

If all went well, the extra_lib directory of the main repository should now look something like this:

mojave:deps_ios adavid$ ll ../gpac_public/extra_lib/lib/iOS/
total 358808
-rw-r--r--  1 adavid  staff   6.3M Apr  2 16:16 libSDL2.a
-rw-r--r--  1 adavid  staff    27M Apr  2 16:16 libaom.a
-rw-r--r--  1 adavid  staff    54M Apr  2 16:16 libavcodec.a
-rw-r--r--  1 adavid  staff   199K Apr  2 16:16 libavdevice.a
-rw-r--r--  1 adavid  staff    10M Apr  2 16:16 libavfilter.a
-rw-r--r--  1 adavid  staff    12M Apr  2 16:16 libavformat.a
-rw-r--r--  1 adavid  staff   1.8M Apr  2 16:16 libavutil.a
-rw-r--r--  1 adavid  staff    35M Apr  2 16:16 libcrypto.a
-rw-r--r--  1 adavid  staff   1.5M Apr  2 16:16 libfaad.a
-rw-r--r--  1 adavid  staff   4.6M Apr  2 16:16 libfreetype.a
-rw-r--r--  1 adavid  staff   596K Apr  2 16:16 libglues.a
-rw-r--r--  1 adavid  staff   1.8M Apr  2 16:16 libjpeg.a
-rw-r--r--  1 adavid  staff   8.1M Apr  2 16:16 libjs.a
-rw-r--r--  1 adavid  staff   428K Apr  2 16:16 libmad.a
-rw-r--r--  1 adavid  staff   1.1M Apr  2 16:16 libpng.a
-rw-r--r--  1 adavid  staff   7.3M Apr  2 16:16 libssl.a
-rw-r--r--  1 adavid  staff   526K Apr  2 16:16 libswresample.a
-rw-r--r--  1 adavid  staff   2.4M Apr  2 16:16 libswscale.a

Build GPAC

First we need to set up the code signing process in Xcode.

Open <GPAC_ROOT_DIR>/gpac_public/build/xcode/gpac4ios.xcodeproj in Xcode.

On the osmo4ios General properties page, in the Signing section, you'll need to assign a Provisioning Profile and/or maybe change the Bundle identifier in the identity section.

See the Xcode documentation about Provisioning Profiles and code signing.

Close gpac4ios.xcodeproj project in Xcode.

Once this is done, you can run:

<GPAC_ROOT_DIR>/gpac_public/build/xcode$ ./generate_ios.sh

If successful, you should see an .ipa file in <GPAC_ROOT_DIR>/gpac_public/bin/iOS.

mojave:iOS adavid$ ll
total 42536
-rw-r--r--  1 adavid  staff    21M Apr  2 16:48 osmo4-0.7.2-DEV-rev1049-g51dadae6c-master-ios.ipa