[LLVMdev] Fwd: How to figure out what #includes are needed?

[Rodney M. Bates]

-------- Original Message --------
Subject: How to figure out what #includes are needed?
Date: Tue, 16 Dec 2014 21:15:25 -0600
From: Rodney M. Bates <rodney_bates at lcwb.coop>
Reply-To: rodney.m.bates at acm.org
To: llvmdev at cs.uiuc.edu

This is partly an llvm question, and maybe partly C++.

I am trying to make calls on code in the llvm infrastructure.(3.4.2)  I appear
to be missing some include files, but don't know how to track them down.  I get
compile errors on existing llvm header files, like the following two examples:
--------------------------------------------------------------------------------

In file included from LLVMDIBuilder.cpp:16:
In file included from /usr/local/include/llvm/Support/CBindingWrapping.h:17:
In file included from /usr/local/include/llvm/Support/Casting.h:18:
In file included from /usr/local/include/llvm/Support/type_traits.h:22:
In file included from /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/utility:70:
In file included from /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/stl_pair.h:59:
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/move.h:185:5: error: conflicting types for 'swap'
     swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])
     ^
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/move.h:166:5: note: previous definition is here
     swap(_Tp& __a, _Tp& __b)

--------------------------------------------------------------------------------
In file included from LLVMDIBuilder.cpp:16:
In file included from /usr/local/include/llvm/Support/CBindingWrapping.h:17:
In file included from /usr/local/include/llvm/Support/Casting.h:18:
/usr/local/include/llvm/Support/type_traits.h:48:33: error: functions that differ only in their return type cannot be overloaded
     template<typename T> double is_class_helper(...);
                                 ^
/usr/local/include/llvm/Support/type_traits.h:47:31: note: previous declaration is here
     template<typename T> char is_class_helper(void(T::*)());
                               ^
--------------------------------------------------------------------------------

Obviously, these files compile when included by the normal llvm build
process.  I have gotten many previous similar errors to go away by rote copying
in of all the #include lines in the full code listing in the new Kaleidoscope
Chapter 8 example and all those in core.cpp, but many more remain.

I would have expected missing declarations from missing include files to
give error messages like "undeclared identifier", but the effect appears to
be to change the actual type denoted by a syntactic type construction.

My command line is:

clang++ -g LLVMDIBuilder.cpp `llvm-config --cxxflags --libs all`

$lvm-config --cxxflags --libs all
-I/usr/local/include  -D_DEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -g -fvisibility-inlines-hidden -fno-exceptions -fno-rtti -fPIC -Woverloaded-virtual -Wcast-qual
-lLLVMInstrumentation -lLLVMIRReader -lLLVMAsmParser -lLLVMDebugInfo -lLLVMOption -lLLVMLTO -lLLVMLinker -lLLVMipo -lLLVMVectorize -lLLVMBitWriter -lLLVMBitReader -lLLVMTableGen -lLLVMR600CodeGen -lLLVMR600Desc -lLLVMR600Info -lLLVMR600AsmPrinter -lLLVMSystemZDisassembler -lLLVMSystemZCodeGen -lLLVMSystemZAsmParser -lLLVMSystemZDesc -lLLVMSystemZInfo -lLLVMSystemZAsmPrinter -lLLVMHexagonCodeGen -lLLVMHexagonAsmPrinter -lLLVMHexagonDesc -lLLVMHexagonInfo -lLLVMNVPTXCodeGen -lLLVMNVPTXDesc -lLLVMNVPTXInfo -lLLVMNVPTXAsmPrinter -lLLVMCppBackendCodeGen -lLLVMCppBackendInfo -lLLVMMSP430CodeGen -lLLVMMSP430Desc -lLLVMMSP430Info -lLLVMMSP430AsmPrinter -lLLVMXCoreDisassembler -lLLVMXCoreCodeGen -lLLVMXCoreDesc -lLLVMXCoreInfo -lLLVMXCoreAsmPrinter -lLLVMMipsDisassembler -lLLVMMipsCodeGen -lLLVMMipsAsmParser -lLLVMMipsDesc -lLLVMMipsInfo -lLLVMMipsAsmPrinter -lLLVMARMDisassembler -lLLVMARMCodeGen -lLLVMARMAsmParser -lLLVMARMDesc -lLLVMARMInfo -lLLVMARMAsmPrinter -lLLVMAArch64Disassembler -lLLV

MAArch64CodeGen -lLLVMAArch64AsmParser -lLLVMAArch64Desc -lLLVMAArch64Info -lLLVMAArch64AsmPrinter -lLLVMAArch64Utils -lLLVMPowerPCCodeGen -lLLVMPowerPCAsmParser -lLLVMPowerPCDesc -lLLVMPowerPCInfo -lLLVMPowerPCAsmPrinter -lLLVMSparcCodeGen -lLLVMSparcDesc -lLLVMSparcInfo -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMX86Desc -lLLVMX86Info -lLLVMX86AsmPrinter -lLLVMX86Utils -lLLVMMCDisassembler -lLLVMMCParser -lLLVMInterpreter -lLLVMMCJIT -lLLVMJIT -lLLVMCodeGen -lLLVMObjCARCOpts -lLLVMScalarOpts -lLLVMInstCombine -lLLVMTransformUtils -lLLVMipa -lLLVMAnalysis -lLLVMRuntimeDyld -lLLVMExecutionEngine -lLLVMTarget -lLLVMMC -lLLVMObject -lLLVMCore -lLLVMSupport

How do I figure out what to include to fix these?



-- 
Rodney Bates
rodney.m.bates at acm.org