翻译I've been trying to cross compile libogg for armv6, armv6 and i386 using the iOS 5.1 SDK in Mountain Lion. Libogg uses autoconf, and I've been having pretty similar issues with a few other libraries as well. I picked up a neat little cross-compiling script from here. I had to update it a bit to find the location of the SDK's.
GLOBAL_OUTDIR="`pwd`/dependencies" mkdir -p $GLOBAL_OUTDIR/include $GLOBAL_OUTDIR/lib OUTDIR="./outdir" OGG_LIB="`pwd`/libogg-1.3.0" IOS_BASE_SDK="5.1" IOS_DEPLOY_TGT="3.2" setenv_all() { # Add internal libs export CFLAGS="$CFLAGS -I$GLOBAL_OUTDIR/include -L$GLOBAL_OUTDIR/lib" export CXX="$DEVROOT/usr/bin/llvm-g++-4.2" export CC="$DEVROOT/usr/bin/llvm-gcc-4.2" export LD=$DEVROOT/usr/bin/ld export AR=$DEVROOT/usr/bin/ar export AS=$DEVROOT/usr/bin/as export NM=$DEVROOT/usr/bin/nm export RANLIB=$DEVROOT/usr/bin/ranlib export LDFLAGS="-L$SDKROOT/usr/lib/" export CPPFLAGS=$CFLAGS export CXXFLAGS=$CFLAGS } setenv_arm6() { unset DEVROOT SDKROOT CFLAGS CC LD CPP CXX AR AS NM CXXCPP RANLIB LDFLAGS CPPFLAGS CXXFLAGS export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer export SDKROOT=$DEVROOT/SDKs/iPhoneOS$IOS_BASE_SDK.sdk export CFLAGS="-arch armv6 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT -I$SDKROOT/usr/include/" setenv_all } setenv_arm7() { unset DEVROOT SDKROOT CFLAGS CC LD CPP CXX AR AS NM CXXCPP RANLIB LDFLAGS CPPFLAGS CXXFLAGS export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer export SDKROOT=$DEVROOT/SDKs/iPhoneOS$IOS_BASE_SDK.sdk export CFLAGS="-arch armv7 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT -I$SDKROOT/usr/include/" setenv_all } setenv_i386() { unset DEVROOT SDKROOT CFLAGS CC LD CPP CXX AR AS NM CXXCPP RANLIB LDFLAGS CPPFLAGS CXXFLAGS export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer export SDKROOT=$DEVROOT/SDKs/iPhoneSimulator$IOS_BASE_SDK.sdk export CFLAGS="-arch i386 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT" setenv_all } create_outdir_lipo() { for lib_i386 in `find $LOCAL_OUTDIR/i386 -name "lib*\.a"`; do lib_arm6=`echo $lib_i386 | sed "s/i386/arm6/g"` lib_arm7=`echo $lib_i386 | sed "s/i386/arm7/g"` lib=`echo $lib_i386 | sed "s/i386\///g"` lipo -arch armv6 $lib_arm6 -arch armv7 $lib_arm7 -arch i386 $lib_i386 -create -output $lib done } merge_libfiles() { DIR=$1 LIBNAME=$2 cd $DIR for i in `find . -name "lib*.a"`; do $AR -x $i done $AR -r $LIBNAME *.o rm -rf *.o __* cd - }And then to build the ogg library.
## libogg cd $OGG_LIB rm -rf $OUTPUT_DIR mkdir -p $OUTDIR/arm6 $OUTDIR/arm7 $OUTDIR/i386 ## Build for armv6 make clean 2> /dev/null make distclean 2> /dev/null setenv_arm6 ./configure --host=arm-apple-darwin6 --enable-shared=no make cp /src/.libs/libogg.a $OUTDIR/arm6 ## Build for armv7 make clean 2> /dev/null make distclean 2> /dev/null setenv_arm7 ./configure --host=arm-apple-darwin7 --enable-shared=no make cp src/.libs/libogg.a $OUTDIR/arm7 ## Build for iPhone simulator make clean 2> /dev/null setenv_i386 ./configure make -j4 cp src/.libs/libogg.a $OUTDIR/i386 ## Stich it altogether in a fat .a file. create_outdir_lipoAnyway, when building armv6 and armv7, configure finds the compiler's and sdk's okay , and the compiling stage goes off without a hitch. But they both fail to link. The armv7 build spits out the error.
ld: in section __TEXT,__text reloc 1: unknown relocation type 9 for architecture armv7 collect2: ld returned 1 exit statusAnd when I test the output binary with lipo :
$ lipo -info libogg.a lipo: archive with no architecture specification: libogg.a (can't determine architecture for it)What is strange is i386 seems to compile perfectly, (I've tried it in the simulator and all is okay).
Any suggestions on what I can do to try and fix this, or a least where I should start looking. Sorry for the massive code dumps, and thanks.