Re: Wget2 cross-compile on iOS arm64

[Ryan Schmidt]

On Mar 21, 2021, at 05:41, Jeffrey Walton wrote:

> I've been testing iOS cross-compiles. It looks like Wget2 is having
> trouble with arm64:
> 
> $ echo $CPPFLAGS
> -DNDEBUG -isysroot
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS8.2.sdk
> 
> $ echo $CFLAGS
> -Wall -g2 -O3 -fPIC -arch arm64 -miphoneos-version-min=6 --sysroot
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS8.2.sdk
> 
> $ echo $CXXFLAGS
> -Wall -g2 -O3 -fPIC -arch arm64 -miphoneos-version-min=6
> -stdlib=libc++ --sysroot
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS8.2.sdk
> 
> $ echo $LDFLAGS

I am not familiar with the --sysroot flag you used.

In MacPorts, when we use an SDK, we use the -isysroot flag in CFLAGS and 
CXXFLAGS and the -Wl,-syslibroot flag in LDFLAGS.

On macOS 10.13.6 with Xcode 9.4.1 I was able to compile wget 1.21.1 for iOS 
with these commands:


SDK="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS11.4.sdk"

CPPFLAGS="-DNDEBUG" \
CFLAGS="-Wall -g2 -O3 -fPIC -arch arm64 -miphoneos-version-min=6 -isysroot 
$SDK" \
CXXFLAGS="-Wall -g2 -O3 -fPIC -arch arm64 -miphoneos-version-min=6 
-stdlib=libc++ -isysroot $SDK" \
LDFLAGS="-arch arm64 -Wl,-syslibroot,$SDK" \
./configure \
--host=arm64-apple-darwin \
--disable-ntlm \
--disable-pcre \
--disable-pcre2 \
--disable-silent-rules \
--without-included-regex \
--without-libiconv-prefix \
--without-libidn \
--without-libpsl \
--without-ssl \
--without-zlib \

make -j$(sysctl -n hw.activecpu)


I did not try to run the execuable on an iPhone but it is compiled for arm64.