[Bug]: Failed to compile when tweak file name with .xi on latest theos version!

[4ch12dy]

What are the steps to reproduce this issue?

1. Make new project
2. make
3. see the error...

What happens?

> Making all for tweak test…
/Applications/Xcode11.4.app/Contents/Developer/usr/bin/make -f Makefile --no-keep-going COLOR=1 \
		internal-library-compile \
		_THEOS_CURRENT_TYPE=tweak THEOS_CURRENT_INSTANCE=test _THEOS_CURRENT_OPERATION=compile \
		THEOS_BUILD_DIR="." _THEOS_MAKE_PARALLEL=yes
/Applications/Xcode11.4.app/Contents/Developer/usr/bin/make -f Makefile --no-print-directory --no-keep-going internal-tweak-compile _THEOS_CURRENT_TYPE="tweak" THEOS_CURRENT_INSTANCE="test" _THEOS_CURRENT_OPERATION="compile" THEOS_BUILD_DIR="." THEOS_CURRENT_ARCH="arm64"
set -o pipefail; (mkdir -p /Users/xia0/xia0/iOSRE/Tweaks/test/.theos/obj/debug/arm64/)
(printf "\e[0;3%im==> \e[1;39m%s…\e[m\n" 2 "Compiling Tweak.xmi (arm64)"); set -o pipefail; (/Applications/Xcode11.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -x objective-c++ -c -fcolor-diagnostics -DTARGET_IPHONE=1 -O0 -Wall -ggdb -Werror  -isysroot "/Applications/Xcode11.4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.4.sdk" -target arm64-apple-ios7.0   -fobjc-arc -DDEBUG -O0  -DTHEOS_INSTANCE_NAME="\"test\""   -arch arm64       -stdlib=libc++        /Users/xia0/xia0/iOSRE/Tweaks/test/.theos/obj/debug/arm64/Tweak.xmi.mii -o /Users/xia0/xia0/iOSRE/Tweaks/test/.theos/obj/debug/arm64/Tweak.xmi.777f8e61.o)
==> Compiling Tweak.xmi (arm64)…
Tweak.xmi:38:80: error: expected ')'
static __attribute__((constructor)) void _logosLocalCtor_d26827a2(int __unused argc, char __unused **argv, char __unused **envp) {
                                                                               ^
Tweak.xmi:38:66: note: to match this '('
static __attribute__((constructor)) void _logosLocalCtor_d26827a2(int __unused argc, char __unused **argv, char __unused **envp) {
                                                                 ^
1 error generated.
make[3]: *** [/Users/xia0/xia0/iOSRE/Tweaks/test/.theos/obj/debug/arm64/Tweak.xmi.777f8e61.o] Error 1
make[2]: *** [/Users/xia0/xia0/iOSRE/Tweaks/test/.theos/obj/debug/arm64/test.dylib] Error 2
make[1]: *** [internal-library-all_] Error 2
make: *** [test.all.tweak.variables] Error 2

What were you expecting to happen?

Compile well.

Paste any relevant logs, error output, etc.

# the simple test code

%ctor {
   printf("hello theos");
}

# and Tweak.xi.pre
extern void CFLog(int32_t level, CFStringRef format, ...);
# 20 "/opt/theos/vendor/include/HBLog.h" 2
# 28 "/opt/theos/Prefix.pch" 2
# 2 "<built-in>" 2
# 1 "Tweak.xi" 2
# 38 "Tweak.xi"
%ctor {
 printf("hello theos");
}

# Tweak.xi.mi
extern void CFLog(int32_t level, CFStringRef format, ...);
# 20 "/opt/theos/vendor/include/HBLog.h" 2
# 28 "/opt/theos/Prefix.pch" 2
# 2 "<built-in>" 2
# 1 "Tweak.xi" 2
# 38 "Tweak.xi"
static __attribute__((constructor)) void _logosLocalCtor_8c549b80(int __unused argc, char __unused **argv, char __unused **envp) {
 printf("hello theos");
}

Additional context

This problem occurs after updating theos to the latest version!

if remove __unused in Tweak.xi.mi, compile well.

What OS are you seeing the problem on?

macOS

What OS version does it have installed?

11.1

What toolchain and version are you using?

Xcode11.4

Which SDK version are you using?

iOS13

What OS is your client device running?

iOS

What OS version does it have installed?

iOS14

Which device model is it?

iPhoneXS

Which jailbreak is it using (if relevant)?

Unc0ver

[4ch12dy]

Finally I added these CFLAGS "-Wno-unused-variable -D__unused="" -Wno-ambiguous-macro" fix the problem.
But I think it is just a stopgap, I don't know why system not handle "__unused" well between theos and clang.

[L1ghtmann]

Is this still an issue with the latest theos? I can't seem to replicate with a simple logging .xi/.x project.

Edit: I was able to replicate the error: expected ')' errors by declaring an extern "C" function in a non-c++ file (i.e., .x/.xi)