Hi all, I am new to PJSIP and iOS development, so forgive me, if my questions are stupid. I am trying to compile pjsua for armv6, using: ARCH='-arch armv6' ./configure-iphone But I get error: checking whether the C compiler works... no aconfigure: error: in `/Users/MaksimSolovjov/Documents/iOS/pjproject-2.2.1': aconfigure: error: C compiler cannot create executables See `config.log' for more details Here are some snippets from config.log: clang: error: argument to '-V' is missing (expected 1 value) clang: error: no input files aconfigure:2798: $? = 1 clang: error: unknown argument: '-qversion' [-Wunused-command-line-argument-hard-error-in-future] clang: note: this will be a hard error (cannot be downgraded to a warning) in the future clang: error: no input files ld: file is universal (5 slices) but does not contain a(n) armv6 slice I have iOS SDK7 installed and XCode 5. Can someone help me? Any help will be highly appreciated!