[Continued] Cannot find reference for enum class member in Android build system, but command line compile is fine.

[fiddleyuan]

This is a continued topic for issue #1197

This is a issue found in C++ project in Android, where I cannot find all reference for enum class member, but typedef'ed enum member is working perfectly. @cslux once made a sample C++ source code. I tested in command line compile with g++:
rc -c g++ -std=c++11 -Wall -Wextra test.cpp -o test
It turns out working fine in finding references.

So I modify source code to build it in Android build system:

• create a Android.mk file, this is very typical in Android build system:

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

LOCAL_MODULE := TestRTags
LOCAL_SRC_FILES := src/test.cpp
LOCAL_INC_FILES := inc/test.h
LOCAL_CFLAGS := -Wall -Wno-unused-parameter -Wextra

include $(BUILD_EXECUTABLE)

• create two folders: src and inc
  In inc, there's test.h header file:

#include <iostream>

typedef enum{
    Type1,
    Type2,
    Type3
} Type;

enum class Format {
    FormatInvalid = -1,
    Format1,
    Format2,
    Format3,
};

In src, we have test.cpp source file:

#include `test.h`

int main()
{
    Format format = Format::Format3;

    if (format == Format::Format3)
        std::cout << "Format3" << std::endl;
    else if (format == Format::Format2)
        std::cout << "Format2" << std::endl;
    else if (format == Format::Format1)
        std::cout << "Format1" << std::endl;
    else
        std::cout << "Error " << static_cast<std::underlying_type<Format>::type>(Format::FormatInvalid) << std::endl;

    std::cout << "Value of enum class: " << static_cast<std::underlying_type<Format>::type>(Format::Format1) << std::endl;
    std::cout << "Value of enum: " << Type1 << std::endl;;
    return 0;
}

And here's what I got:

• In command line compile, RTags finding reference is still working good.
• In Android build, I cannot find reference for enum class member.

So the problem tends to be in Android build itself. In order to find the differences, I collected both rdm logging:

• Using command line compile, i.e. using rc -c ...

listening /run/user/1000/rdm.socket
Running with 8 jobs, using args: -ferror-limit=50 -Wall -fspell-checking -Wno-unknown-warning-option
Includepaths: "-isystem" /usr/lib/llvm-3.4/lib/clang/3.4/include/

Parsed Source(s) successfully: List<Source>(Source(/usr/bin/g++ -std=c++11 -Wall -Wextra -ferror-limit=50 -Wall -fspell-checking -Wno-unknown-warning-option -DRTAGS= -isystem /usr/lib/llvm-3.4/lib/clang/3.4/include/ -o /home/shuaiy/proj/Android/vendor/test_rtags/test /home/shuaiy/proj/Android/vendor/test_rtags/src/test.cpp Build: /home/shuaiy/proj/Android/ compile_commands: ))
[100%] 1/1 12:00:41 ~/proj/Android/vendor/test_rtags/src/test.cpp in 535ms. (34106 syms, 43711 symNames, 289 includes, 129 of 129 files, symbols: 42314 of 42314, 50792 cursors, 23581802 bytes written, 128 queried 9ms) (140/250/81ms). (priority 0)
Jobs took 0.54s. We're using 4mb of memory.
Query opened 0 files for project /home/shuaiy/proj/Android/vendor/test_rtags/
Output from /home/shuaiy/proj/Android/vendor/test_rtags/src/test.cpp:
CI::parse loading unit: clang "-std=c++11" "-Wall" "-Wextra" "-ferror-limit=50" "-Wall" "-fspell-checking" "-Wno-unknown-warning-option" "-DRTAGS=" "-isystem" "/usr/lib/llvm-3.4/lib/clang/3.4/include/" /home/shuaiy/proj/Android/vendor/test_rtags/src/test.cpp true


rc -e -R Format3
=> src/test.cpp:5:29:       Format format = Format::Format3;
=> src/test.cpp:7:27:       if (format == Format::Format3)
=> inc/test.h:13:5:         Format3,
Query opened 261 files for project /home/shuaiy/proj/Android/vendor/test_rtags/
rc -e -R Type1
=> src/test.cpp:17:39:      std::cout << "Value of enum: " << Type1 << std::endl;;
=> inc/test.h:4:5:          Type1,
Query opened 261 files for project /home/shuaiy/proj/Android/vendor/test_rtags/

• Using Android build system

listening /run/user/1000/rdm.socket
Running with 8 jobs, using args: -ferror-limit=50 -Wall -fspell-checking -Wno-unknown-warning-option
Includepaths: "-isystem" /usr/lib/llvm-3.4/lib/clang/3.4/include/

Parsed Source(s) successfully: List<Source>(Source(/usr/bin/c++ -c -fno-exceptions -Wno-multichar -fno-strict-aliasing -fstack-protector-strong -ffunction-sections -fdata-sections -funwind-tables -Wa,--noexecstack -Werror=format-security -fno-short-enums -no-canonical-prefixes -Werror=pointer-to-int-cast -Werror=int-to-pointer-cast -Werror=implicit-function-declaration -O2 -g -Wstrict-aliasing=2 -fmessage-length=0 -W -Wall -Wno-unused -Winit-self -Wpointer-arith -UDEBUG -fdebug-prefix-map=/proc/self/cwd= -Werror=int-conversion -Wno-reserved-id-macro -Wno-format-pedantic -Wno-unused-command-line-argument -fcolor-diagnostics -Wno-expansion-to-defined -fdebug-prefix-map=/home/shuaiy/proj/Android/= -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Werror=date-time -nostdlibinc -target aarch64-linux-android -Bprebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/aarch64-linux-android/bin -Wsign-promo -Wno-inconsistent-missing-override -Wno-null-dereference -fvisibility-inlines-hidden -std=gnu++14 -fno-rtti -Wall -Wno-unused-parameter -Wextra -fpie -Werror=int-to-pointer-cast -Werror=pointer-to-int-cast -Werror=address-of-temporary -Werror=return-type -mno-ae -Wno-vectorizer-no-neon -ferror-limit=50 -Wall -fspell-checking -Wno-unknown-warning-option -D_FORTIFY_SOURCE=2 -D__compiler_offsetof=__builtin_offsetof -DANDROID -DANDROID_STRICT -DNDEBUG -D_USING_LIBCXX -DRTAGS= -I/home/shuaiy/proj/Android/vendor/test_rtags -I/home/shuaiy/proj/Android/out/target/product/sdm845/obj/EXECUTABLES/TestRTags_intermediates -Iout/target/product/sdm845/gen/EXECUTABLES/TestRTags_intermediates -I/home/shuaiy/proj/Android/libnativehelper/include/nativehelper -I/home/shuaiy/proj/Android/external/libcxx/include -I/home/shuaiy/proj/Android/external/libcxxabi/include -I/home/shuaiy/proj/Android/system/core/include -I/home/shuaiy/proj/Android/system/media/audio/include -I/home/shuaiy/proj/Android/hardware/libhardware/include -I/home/shuaiy/proj/Android/hardware/libhardware_legacy/include -I/home/shuaiy/proj/Android/hardware/ril/include -I/home/shuaiy/proj/Android/libnativehelper/include -I/home/shuaiy/proj/Android/frameworks/native/include -I/home/shuaiy/proj/Android/frameworks/native/opengl/include -isystem /home/shuaiy/proj/Android/frameworks/av/include -isystem /home/shuaiy/proj/Android/out/target/product/sdm845/obj/include -isystem /home/shuaiy/proj/Android/bionic/libc/arch-arm64/include -isystem /home/shuaiy/proj/Android/bionic/libc/include -isystem /home/shuaiy/proj/Android/bionic/libc/kernel/uapi -isystem /home/shuaiy/proj/Android/bionic/libc/kernel/uapi/asm-arm64 -isystem /home/shuaiy/proj/Android/bionic/libc/kernel/android/uapi -isystem /usr/lib/llvm-3.4/lib/clang/3.4/include/ -o /home/shuaiy/proj/Android/out/target/product/sdm845/obj/EXECUTABLES/TestRTags_intermediates/src/test.o /home/shuaiy/proj/Android/vendor/test_rtags/src/test.cpp Build: /home/shuaiy/proj/Android/ compile_commands: ))
[100%] 1/1 11:40:46 ~/proj/Android/vendor/test_rtags/src/test.cpp in 1181ms. (78896 syms, 92162 symNames, 421 includes, 135 of 135 files, symbols: 99843 of 99843, 120293 cursors, 54425165 bytes written, 134 queried 13ms) (203/635/198ms). (priority 0)
Jobs took 1.19s. We're using 5mb of memory.
Query opened 0 files for project /home/shuaiy/proj/Android/.rtags/
Output from /home/shuaiy/proj/Android/vendor/test_rtags/src/test.cpp:
CI::parse loading unit: clang "-c" "-fno-exceptions" "-Wno-multichar" "-fno-strict-aliasing" "-fstack-protector-strong" "-ffunction-sections" "-fdata-sections" "-funwind-tables" "-Wa,--noexecstack" "-Werror=format-security" "-fno-short-enums" "-no-canonical-prefixes" "-Werror=pointer-to-int-cast" "-Werror=int-to-pointer-cast" "-Werror=implicit-function-declaration" "-O2" "-g" "-Wstrict-aliasing=2" "-fmessage-length=0" "-W" "-Wall" "-Wno-unused" "-Winit-self" "-Wpointer-arith" "-UDEBUG" "-fdebug-prefix-map=/proc/self/cwd=" "-Werror=int-conversion" "-Wno-reserved-id-macro" "-Wno-format-pedantic" "-Wno-unused-command-line-argument" "-fcolor-diagnostics" "-Wno-expansion-to-defined" "-fdebug-prefix-map=/home/shuaiy/proj/Android/=" "-Werror=return-type" "-Werror=non-virtual-dtor" "-Werror=address" "-Werror=sequence-point" "-Werror=date-time" "-nostdlibinc" "-target" "aarch64-linux-android" "-Bprebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/aarch64-linux-android/bin" "-Wsign-promo" "-Wno-inconsistent-missing-override" "-Wno-null-dereference" "-fvisibility-inlines-hidden" "-std=gnu++14" "-fno-rtti" "-Wall" "-Wno-unused-parameter" "-Wextra" "-fpie" "-Werror=int-to-pointer-cast" "-Werror=pointer-to-int-cast" "-Werror=address-of-temporary" "-Werror=return-type" "-mno-ae" "-Wno-vectorizer-no-neon" "-ferror-limit=50" "-Wall" "-fspell-checking" "-Wno-unknown-warning-option" "-DRTAGS=" "-D_FORTIFY_SOURCE=2" "-D__compiler_offsetof=__builtin_offsetof" "-DANDROID" "-DANDROID_STRICT" "-DNDEBUG" "-D_USING_LIBCXX" "-I/home/shuaiy/proj/Android/vendor/test_rtags" "-I/home/shuaiy/proj/Android/out/target/product/sdm845/obj/EXECUTABLES/TestRTags_intermediates" "-Iout/target/product/sdm845/gen/EXECUTABLES/TestRTags_intermediates" "-I/home/shuaiy/proj/Android/libnativehelper/include/nativehelper" "-I/home/shuaiy/proj/Android/external/libcxx/include" "-I/home/shuaiy/proj/Android/external/libcxxabi/include" "-I/home/shuaiy/proj/Android/system/core/include" "-I/home/shuaiy/proj/Android/system/media/audio/include" "-I/home/shuaiy/proj/Android/hardware/libhardware/include" "-I/home/shuaiy/proj/Android/hardware/libhardware_legacy/include" "-I/home/shuaiy/proj/Android/hardware/ril/include" "-I/home/shuaiy/proj/Android/libnativehelper/include" "-I/home/shuaiy/proj/Android/frameworks/native/include" "-I/home/shuaiy/proj/Android/frameworks/native/opengl/include" "-isystem" "/home/shuaiy/proj/Android/frameworks/av/include" "-isystem" "/home/shuaiy/proj/Android/out/target/product/sdm845/obj/include" "-isystem" "/home/shuaiy/proj/Android/bionic/libc/arch-arm64/include" "-isystem" "/home/shuaiy/proj/Android/bionic/libc/include" "-isystem" "/home/shuaiy/proj/Android/bionic/libc/kernel/uapi" "-isystem" "/home/shuaiy/proj/Android/bionic/libc/kernel/uapi/asm-arm64" "-isystem" "/home/shuaiy/proj/Android/bionic/libc/kernel/android/uapi" "-isystem" "/usr/lib/llvm-3.4/lib/clang/3.4/include/" /home/shuaiy/proj/Android/vendor/test_rtags/src/test.cpp true
Can't decide which of these symbols are right for me DeclRefExpr ref /home/shuaiy/proj/Android/external/libcxx/include/memory:4568:12 List<CXCursor>(CXXMethod cursor make_shared() make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@F@make_shared#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3842:28, FunctionTemplate cursor make_shared(_A0 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>1#Tmake_shared#&t1.0#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3845:32, FunctionTemplate cursor make_shared(_A0 &, _A1 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>2#T#Tmake_shared#&t1.0#&t1.1#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3848:32, FunctionTemplate cursor make_shared(_A0 &, _A1 &, _A2 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>3#T#T#Tmake_shared#&t1.0#&t1.1#&t1.2#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3851:32) Need to parse types
Can't decide which of these symbols are right for me DeclRefExpr ref /home/shuaiy/proj/Android/external/libcxx/include/memory:4576:12 List<CXCursor>(CXXMethod cursor make_shared() make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@F@make_shared#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3842:28, FunctionTemplate cursor make_shared(_A0 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>1#Tmake_shared#&t1.0#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3845:32, FunctionTemplate cursor make_shared(_A0 &, _A1 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>2#T#Tmake_shared#&t1.0#&t1.1#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3848:32, FunctionTemplate cursor make_shared(_A0 &, _A1 &, _A2 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>3#T#T#Tmake_shared#&t1.0#&t1.1#&t1.2#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3851:32) Need to parse types
Can't decide which of these symbols are right for me DeclRefExpr ref /home/shuaiy/proj/Android/external/libcxx/include/memory:4584:12 List<CXCursor>(CXXMethod cursor make_shared() make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@F@make_shared#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3842:28, FunctionTemplate cursor make_shared(_A0 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>1#Tmake_shared#&t1.0#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3845:32, FunctionTemplate cursor make_shared(_A0 &, _A1 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>2#T#Tmake_shared#&t1.0#&t1.1#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3848:32, FunctionTemplate cursor make_shared(_A0 &, _A1 &, _A2 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>3#T#T#Tmake_shared#&t1.0#&t1.1#&t1.2#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3851:32) Need to parse types
Can't decide which of these symbols are right for me DeclRefExpr ref /home/shuaiy/proj/Android/external/libcxx/include/memory:4592:12 List<CXCursor>(CXXMethod cursor make_shared() make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@F@make_shared#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3842:28, FunctionTemplate cursor make_shared(_A0 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>1#Tmake_shared#&t1.0#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3845:32, FunctionTemplate cursor make_shared(_A0 &, _A1 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>2#T#Tmake_shared#&t1.0#&t1.1#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3848:32, FunctionTemplate cursor make_shared(_A0 &, _A1 &, _A2 &) make_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>3#T#T#Tmake_shared#&t1.0#&t1.1#&t1.2#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3851:32) Need to parse types
Can't decide which of these symbols are right for me DeclRefExpr ref /home/shuaiy/proj/Android/external/libcxx/include/memory:4600:12 List<CXCursor>(FunctionTemplate cursor allocate_shared(const _Alloc &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>1#Tallocate_shared#&1t1.0#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3855:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>2#T#Tallocate_shared#&1t1.0#&t1.1#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3859:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &, _A1 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>3#T#T#Tallocate_shared#&1t1.0#&t1.1#&t1.2#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3863:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &, _A1 &, _A2 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>4#T#T#T#Tallocate_shared#&1t1.0#&t1.1#&t1.2#&t1.3#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3867:9) Need to parse types
Can't decide which of these symbols are right for me DeclRefExpr ref /home/shuaiy/proj/Android/external/libcxx/include/memory:4608:12 List<CXCursor>(FunctionTemplate cursor allocate_shared(const _Alloc &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>1#Tallocate_shared#&1t1.0#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3855:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>2#T#Tallocate_shared#&1t1.0#&t1.1#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3859:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &, _A1 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>3#T#T#Tallocate_shared#&1t1.0#&t1.1#&t1.2#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3863:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &, _A1 &, _A2 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>4#T#T#T#Tallocate_shared#&1t1.0#&t1.1#&t1.2#&t1.3#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3867:9) Need to parse types
Can't decide which of these symbols are right for me DeclRefExpr ref /home/shuaiy/proj/Android/external/libcxx/include/memory:4616:12 List<CXCursor>(FunctionTemplate cursor allocate_shared(const _Alloc &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>1#Tallocate_shared#&1t1.0#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3855:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>2#T#Tallocate_shared#&1t1.0#&t1.1#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3859:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &, _A1 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>3#T#T#Tallocate_shared#&1t1.0#&t1.1#&t1.2#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3863:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &, _A1 &, _A2 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>4#T#T#T#Tallocate_shared#&1t1.0#&t1.1#&t1.2#&t1.3#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3867:9) Need to parse types
Can't decide which of these symbols are right for me DeclRefExpr ref /home/shuaiy/proj/Android/external/libcxx/include/memory:4624:12 List<CXCursor>(FunctionTemplate cursor allocate_shared(const _Alloc &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>1#Tallocate_shared#&1t1.0#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3855:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>2#T#Tallocate_shared#&1t1.0#&t1.1#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3859:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &, _A1 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>3#T#T#Tallocate_shared#&1t1.0#&t1.1#&t1.2#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3863:9, FunctionTemplate cursor allocate_shared(const _Alloc &, _A0 &, _A1 &, _A2 &) allocate_shared c:@N@std@N@__1@CT>1#T@shared_ptr@FT@>4#T#T#T#Tallocate_shared#&1t1.0#&t1.1#&t1.2#&t1.3#S /home/shuaiy/proj/Android/external/libcxx/include/memory:3867:9) Need to parse types

rc -e -R Format3
=> /home/shuaiy/proj/Android/vendor/test_rtags/inc/test.h:13:5:      Format3,
Query opened 405 files for project /home/shuaiy/proj/Android/.rtags/
rc -e -R Format::Format3
=> /home/shuaiy/proj/Android/vendor/test_rtags/inc/test.h:13:5:      Format3,
Query opened 405 files for project /home/shuaiy/proj/Android/.rtags/
rc -e -R Type1
=> /home/shuaiy/proj/Android/vendor/test_rtags/src/test.cpp:17:39:           std::cout << "Value of enum: " << Type1 << std::endl;;
=> /home/shuaiy/proj/Android/vendor/test_rtags/inc/test.h:4:5:       Type1,
Query opened 273 files for project /home/shuaiy/proj/Android/.rtags/

Now, I'm seeking help from compiler and RTags expert, can we conclude something from both logging.
I really like RTags, I wish I could solve this problem. Thank you so much.

[fiddleyuan]

I noticed that in above Android build rdm log, there are libcxx errors. But I didn't add libcxx support in my Android.mk file. So this must be inherited from Android base build system.

I manually deleted libcxx lines from my compile_commands.json file, and rc -J again. This time I got the following, note there's "handleInclude failed" print.

CI::parse loading unit: clang "-c" "-fno-exceptions" "-Wno-multichar" "-fno-strict-aliasing" "-fstack-protector-strong" "-ffunction-sections" "-fdata-sections" "-funwind-tables" "-Wa,--noexecstack" "-Werror=format-security" "-fno-short-enums" "-no-canonical-prefixes" "-Werror=pointer-to-int-cast" "-Werror=int-to-pointer-cast" "-Werror=implicit-function-declaration" "-O2" "-g" "-Wstrict-aliasing=2" "-fmessage-length=0" "-W" "-Wall" "-Wno-unused" "-Winit-self" "-Wpointer-arith" "-UDEBUG" "-fdebug-prefix-map=/proc/self/cwd=" "-Werror=int-conversion" "-Wno-reserved-id-macro" "-Wno-format-pedantic" "-Wno-unused-command-line-argument" "-fcolor-diagnostics" "-Wno-expansion-to-defined" "-fdebug-prefix-map=/home/shuaiy/proj/Android/=" "-Werror=return-type" "-Werror=non-virtual-dtor" "-Werror=address" "-Werror=sequence-point" "-Werror=date-time" "-nostdlibinc" "-target" "aarch64-linux-android" "-Bprebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/aarch64-linux-android/bin" "-Wsign-promo" "-Wno-inconsistent-missing-override" "-Wno-null-dereference" "-fvisibility-inlines-hidden" "-std=gnu++14" "-fno-rtti" "-Wall" "-Wno-unused-parameter" "-Wextra" "-fpie" "-Werror=int-to-pointer-cast" "-Werror=pointer-to-int-cast" "-Werror=address-of-temporary" "-Werror=return-type" "-mno-ae" "-Wno-vectorizer-no-neon" "-ferror-limit=50" "-Wall" "-fspell-checking" "-Wno-unknown-warning-option" "-DRTAGS=" "-D_FORTIFY_SOURCE=2" "-D__compiler_offsetof=__builtin_offsetof" "-DANDROID" "-DANDROID_STRICT" "-DNDEBUG" "-I/home/shuaiy/proj/Android/vendor/test_rtags/inc" "-I/home/shuaiy/proj/Android/vendor/test_rtags" "-I/home/shuaiy/proj/Android/out/target/product/sdm845/obj/EXECUTABLES/TestRTags_intermediates" "-Iout/target/product/sdm845/gen/EXECUTABLES/TestRTags_intermediates" "-I/home/shuaiy/proj/Android/libnativehelper/include/nativehelper" "-I/home/shuaiy/proj/Android/system/core/include" "-I/home/shuaiy/proj/Android/system/media/audio/include" "-I/home/shuaiy/proj/Android/hardware/libhardware/include" "-I/home/shuaiy/proj/Android/hardware/libhardware_legacy/include" "-I/home/shuaiy/proj/Android/hardware/ril/include" "-I/home/shuaiy/proj/Android/libnativehelper/include" "-I/home/shuaiy/proj/Android/frameworks/native/include" "-I/home/shuaiy/proj/Android/frameworks/native/opengl/include" "-isystem" "/home/shuaiy/proj/Android/frameworks/av/include" "-isystem" "/home/shuaiy/proj/Android/out/target/product/sdm845/obj/include" "-isystem" "/home/shuaiy/proj/Android/bionic/libc/arch-arm64/include" "-isystem" "/home/shuaiy/proj/Android/bionic/libc/include" "-isystem" "/home/shuaiy/proj/Android/bionic/libc/kernel/uapi" "-isystem" "/home/shuaiy/proj/Android/bionic/libc/kernel/uapi/asm-arm64" "-isystem" "/home/shuaiy/proj/Android/bionic/libc/kernel/android/uapi" "-isystem" "/usr/lib/llvm-3.4/lib/clang/3.4/include/" /home/shuaiy/proj/Android/vendor/test_rtags/src/test.cpp true
handleInclude failed (nil) inclusion directive include iostream /home/shuaiy/proj/Android/vendor/test_rtags/inc/test.h:1:1

Is this a bug or I did something wrong? When I delete libcxx from compile_commands.json, I still cannot find reference for enum class member, NOR typedef'ed enum member which used to work. I suspect this is due to that "handleInclude failed" error.

[Andersbakken]

Sorry about the long delay. I honestly can't really see what might be causing this. There are some terrible hacks around the whole:

Can't decide which of these symbols are right for me

But I can't really see what Android would do to impact that.

I suspect that -nostdlibinc is causing a problem. I think your best bet is to try to bisect between all of the many additional command line options until it starts working.