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Perl script that implements a subset of the GNU as preprocessor that Apple's as doesn't

branch: master

Fix use of symbols in literals

The Apple linker does not support relocations against an offset
from a symbol.  Using an intermediate local symbol works around
this limitation.
latest commit 76a72f00e0
Mans Rullgard mansr authored December 03, 2012
Octocat-spinner-32 README Update configure lines; --as is no longer needed July 04, 2010
Octocat-spinner-32 gas-preprocessor.pl Fix use of symbols in literals December 03, 2012
README
To configure ffmpeg for the iPhone 3gs and iPod touch 3g:

./configure --enable-cross-compile --arch=arm --target-os=darwin --cc='/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -arch armv7' --sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk --cpu=cortex-a8 --enable-pic

To configure ffmpeg for all other iPhones and iPods:

./configure --enable-cross-compile --arch=arm --target-os=darwin --cc='/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -arch armv6' --sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk --cpu=arm1176jzf-s

Make sure to replace the iPhone SDK version with the version that you're using.
Pre-3.0 versions aren't supported and probably won't work.

If deploying to all generations, it's recommended to do separate out-of-tree
builds for each architecture, then lipo together the resulting libs. For
instance, assuming separate builds in armv6 and armv7:

lipo -create -arch armv6 armv6/libavcodec/libavcodec.a -arch armv7 armv7/libavcodec/libavcodec.a -output universal/libavcodec.a

and similar for each library. Then in XCode, make sure to build for both armv6
and armv7. If you only care about one generation (since the armv6 devices are
too slow for instance), then lipo is unnecessary of course.
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