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POunable to compile ffmpeg for iOS
 

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    <p>I'm trying to compile FFmpeg for iOS (for iPhone5, in order to do some RSTP streaming stuff) following the <a href="http://www.tangentsoftworks.com/blog/2012/11/12/how-to-prepare-your-mac-for-ios-development-with-ffmpeg-libraries/" rel="nofollow">tutorial here</a> but I get stuck with this error : </p> <pre><code>/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc is unable to create an executable file. C compiler test failed. </code></pre> <p>In my config.log file I have this : </p> <pre><code>BEGIN /var/folders/9g/zv_vdz7x16g1hgx9pqj57zz80000gn/T//ffconf.D3a73otQ.c 1 int main(void){ return 0; } END /var/folders/9g/zv_vdz7x16g1hgx9pqj57zz80000gn/T//ffconf.D3a73otQ.c /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk -arch armv7 -mfpu=neon -miphoneos-version-min=6.0 -mcpu=cortex-a9 -c -o /var/folders/9g/zv_vdz7x16g1hgx9pqj57zz80000gn/T//ffconf.Wv4eZtHX.o /var/folders/9g/zv_vdz7x16g1hgx9pqj57zz80000gn/T//ffconf.D3a73otQ.c /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk -miphoneos-version-min=6.0 --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk -o /var/folders/9g/zv_vdz7x16g1hgx9pqj57zz80000gn/T//ffconf.y84bbrJt /var/folders/9g/zv_vdz7x16g1hgx9pqj57zz80000gn/T//ffconf.Wv4eZtHX.o ld: library not found for -lcrt1.3.1.o collect2: ld returned 1 exit status C compiler test failed. </code></pre> <p>I have other errors with other scripts found on stackoverflow or with google</p> <p>Any idea ?</p> <hr> <p>Ok (i'm kinda new on mac environment), I managed to pass the configure step by fixing the sdk target to the last sdk I have (6.1), removing Other Linker Flags but then the "make" command is full of errors (either with gcc or arm-apple-darwin10-gcc-4.2) : </p> <pre><code>In file included from ./libavutil/internal.h:113, from ./libavutil/common.h:385, from ./libavutil/avutil.h:238, from libavdevice/version.h:28, from libavdevice/avdevice.h:22, from libavdevice/alldevices.c:22: ./libavutil/libm.h:53: error: static declaration of ‘cbrt’ follows non-static declaration ./libavutil/libm.h:60: error: static declaration of ‘cbrtf’ follows non-static declaration ./libavutil/libm.h:86: error: expected identifier or ‘(’ before ‘sizeof’ ./libavutil/libm.h:96: error: expected identifier or ‘(’ before ‘sizeof’ ./libavutil/libm.h:142: error: static declaration of ‘rint’ follows non-static declaration ./libavutil/libm.h:149: error: static declaration of ‘lrint’ follows non-static declaration ./libavutil/libm.h:156: error: static declaration of ‘lrintf’ follows non-static declaration ./libavutil/libm.h:163: error: static declaration of ‘round’ follows non-static declaration ./libavutil/libm.h:170: error: static declaration of ‘roundf’ follows non-static declaration ./libavutil/libm.h:177: error: static declaration of ‘trunc’ follows non-static declaration ./libavutil/libm.h:184: error: static declaration of ‘truncf’ follows non-static declaration make: *** [libavdevice/alldevices.o] Error 1 </code></pre>
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    1. COI noticed the working project had nothing set in **Other Linker Flags** whereas my not-working project had '-arch i386' set in it. I removed that and it seems to have fixed it. If problem is not resolved then unchecking **Compile for Thumb** in the project settings for the static library and the main project.
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      1. USAmit Singh
 

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