Error in ProcessPCH (xcodebuild)

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1

Hi, all
When I use “xcodebuild” to build my iOS project, the process stopped in compling “PrefixHeader.pch”. I use the following command:

=> xcodebuild -project xxx -scheme yyy build OTHER_CFLAGS=“-mllvm -xt-obf”

the error messages are:

=> clang (LLVM option parsing): Unknown command line argument ‘-xt-obf-header’. Try: ‘clang (LLVM option parsing) -help’
clang (LLVM option parsing): Did you mean ‘-xt-obf’?

That means: The “clang” compiler change my “xt-obf” to “xt-obf-header” in compling “PrefixHeader.pch”.
I want to kown the reseaon and the way to fix it. Can anyone help me ? Thanks.

Maxs

2

Hi, all
When I use “xcodebuild” to build my iOS project, the process stopped in compling “PrefixHeader.pch”. I use the following command:

=> xcodebuild -project xxx -scheme yyy build OTHER_CFLAGS=“-mllvm -xt-obf”

the error messages are:

=> clang (LLVM option parsing): Unknown command line argument ‘-xt-obf-header’. Try: ‘clang (LLVM option parsing) -help’
clang (LLVM option parsing): Did you mean ‘-xt-obf’?

That means: The “clang” compiler change my “xt-obf” to “xt-obf-header” in compling “PrefixHeader.pch”.
I want to kown the reseaon and the way to fix it. Can anyone help me ? Thanks.

Maxs

3

Hi, all
I find that the “xcodebuild” can work if I turn off the “Precompile Prefix Header” in “Build Settings”. Are there other ways to fix it? And why clang change
my option?

Thanks,
Maxs

4

It seems to me from the log you posted that it is not clang that changed anything but xcodebuild that is invoking clang with -mllvm -xt-obf-header (I don’t know why).

How is the clang invocation affected by other -mllvm parameters?

5

It could be that xcodebuild passes "-xt-obj-header" independently of your OTHER_CFLAGS. Also, _if_ some option re-writing is going on, it'd likely be done by xcodebuild (not clang).

If you search "file a bug against Xcode", you might find the right place to send this.

best
vedant