Re: Having trouble building an ARM binary for iOS
- From: Scott Graham <sgraham@xxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Mon, 25 Jun 2012 23:02:21 -0700
On Mon, Jun 25, 2012 at 10:33 PM, Dimiter 'malkia' Stanev
<malkia@xxxxxxxxx> wrote:
> On 6/25/2012 9:58 PM, Scott Graham wrote:
>
> Hi,
>
> I'm trying to build libluajit.a for an iOS device build, but I keep
> getting a non-ARM library. When linking against it, I get:
>
> ld: warning: ignoring file /Users/sgraham/luajit-2.0/src/libluajit.a,
> file was built for archive which is not the architecture being linked
> (armv7)
>
> I tried to follow doc/install.html updated for 5.1 instead of 4.3, but
> I'm not sure what I've done wrong. I tried both b10 and git HEAD.
> Below are the only changes from git HEAD. Without -m32, buildvm
> complained that there was a pointer size mismatch.
>
> ---
> [master]sgraham@randall:~/luajit-2.0$ git diff
> diff --git a/src/Makefile b/src/Makefile
> index 6e0c746..6613f0a 100644
> --- a/src/Makefile
> +++ b/src/Makefile
> @@ -28,7 +28,7 @@ NODOTABIVER= 51
> CC= gcc
> #
> # Use this if you want to force a 32 bit build on a 64 bit multilib OS.
> -#CC= gcc -m32
> +CC= clang -m32
> #
> # Since the assembler part does NOT maintain a frame pointer, it's
> pointless
> # to slow down the C part by not omitting it. Debugging, tracebacks and
> ---
>
> And, building with the following script:
> ---
> [master]sgraham@randall:~/luajit-2.0$ cat iosbuild
> #!/bin/bash
>
> make clean
>
> ISDK=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer
> \
> ISDKVER=iPhoneOS5.1.sdk \
> ISDKP=$ISDK/usr/bin/ \
> ISDKF="-arch armv7 -m32 -isysroot $ISDK/SDKs/$ISDKVER" \
> make HOST_CC="clang -m32 -arch i386" CROSS=$ISDKP
> TARGET_FLAGS="$ISDKF" TARGET_SYS=iOS amalg
> ---
>
> I tried both clang and gcc also.
>
> I'm sure there's something obvious I'm doing wrong here... if anyone
> could point it out I would be grateful!
>
> Thanks,
> scott
>
> Can you try this one:
>
> DEVDIR=`xcode-select -print-path`/Platforms
> IOSVER=iPhoneOS5.1.sdk
> SIMVER=iPhoneSimulator5.1.sdk
> IOSDIR=$DEVDIR/iPhoneOS
> .platfor
> m/Developer
> SIMDIR=$DEVDIR/iPhoneSimulator.platform/Developer
> IOSBIN=$IOSDIR/usr/bin/
> SIMBIN=$SIMDIR/usr/bin/
>
> make -j -C $LUAJIT BUILDMODE=static HOST_CFLAGS="-arch i386"
> HOST_LDFLAGS="-arch i386" TARGET_SYS=iOS LUAJIT_SO=libluajit.dylib
> TARGET=arm amalg CROSS=$IOSBIN TARGET_FLAGS="-isysroot $IOSDIR/SDKs/$IOSVER
> -arch armv7"
>
Ah, oops! I "helpfully" put continuation characters at the end of the
lines, I'm not sure why I did that. Much closer now!
I'm getting some missing symbols now:
Undefined symbols for architecture armv7:
"___aeabi_cdcmple", referenced from:
_lj_BC_ISLT in libluajit.a(lj_vm.o)
_lj_BC_ISGE in libluajit.a(lj_vm.o)
...
"___aeabi_ddiv", referenced from:
...
"___aeabi_dsub", referenced from:
_lj_BC_SUBVN in libluajit.a(lj_vm.o)
_lj_BC_SUBNV in libluajit.a(lj_vm.o)
_lj_BC_SUBVV in libluajit.a(lj_vm.o)
_lj_vm_foldarith in libluajit.a(lj_vm.o)
"___aeabi_i2d", referenced from:
and similar. Looks like those are in libgcc, so I guess my clang-link
isn't including that.
Linking against a random copy of libgcc.a seems to work... is there a
better solution for that?
Thanks for your help.
scott
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