https://llvm.org/bugs/show_bug.cgi?id=27890
Bug ID: 27890
Summary: error: multiple overloads of '__va_list_tag'
instantiate to the same signature 'void ()'
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Modules
Assignee: unassignedclangb...@nondot.org
Reporter: biancacristinacriste...@gmail.com
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
The error is seen when trying to build llvm self-hosted with modules.
cd /home/biancacr/clang_build_/obj_with_modules/utils/TableGen &&
/home/biancacr/clang_build_/inst/bin/clang++ -DGTEST_HAS_RTTI=0 -D_GNU_SOURCE
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -fPIC
-fvisibility-inlines-hidden -Wall -W -Wno-unused-parameter -Wwrite-strings
-Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long
-Wcovered-switch-default -Wnon-virtual-dtor -Wdelete-non-virtual-dtor
-Werror=date-time -std=c++11 -fmodules -Xclang
-fmodules-local-submodule-visibility -fmodules-cache-path=module.cache
-ffunction-sections -fdata-sections
-I/home/biancacr/clang_build_/obj_with_modules/utils/TableGen
-I/home/biancacr/clang_build_/src/utils/TableGen
-I/home/biancacr/clang_build_/obj_with_modules/include
-I/home/biancacr/clang_build_/src/include -fno-exceptions -fno-rtti -o
CMakeFiles/obj.llvm-tblgen.dir/TableGen.cpp.o -c
/home/biancacr/clang_build_/src/utils/TableGen/TableGen.cpp
error: multiple overloads of '__va_list_tag' instantiate to the same signature
'void ()'
/home/biancacr/clang_build_/src/utils/TableGen/TableGen.cpp:52:14: note: in
instantiation of function template specialization 'llvm::cl::values<int>'
requested here
cl::values(clEnumValN(PrintRecords, "print-records",
^
note: previous definition is here
1 error generated.
utils/TableGen/CMakeFiles/obj.llvm-tblgen.dir/build.make:675: recipe for target
'utils/TableGen/CMakeFiles/obj.llvm-tblgen.dir/TableGen.cpp.o' failed
make[2]: *** [utils/TableGen/CMakeFiles/obj.llvm-tblgen.dir/TableGen.cpp.o]
Error 1
make[2]: Leaving directory '/home/biancacr/clang_build_/obj_with_modules'
CMakeFiles/Makefile2:482: recipe for target
'utils/TableGen/CMakeFiles/obj.llvm-tblgen.dir/all' failed
make[1]: *** [utils/TableGen/CMakeFiles/obj.llvm-tblgen.dir/all] Error 2
make[1]: Leaving directory '/home/biancacr/clang_build_/obj_with_modules'
Makefile:136: recipe for target 'all' failed
make: *** [all] Error 2
Presummably we cannot merge properly the __builtin_va_list.
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