Dear List:
I am attempting to build llvm/clang using Cygwin and gcc. Below are the results. I am able to build clang, but clang does not build clang. I noticed that Cygwin has version 3.1 available. Was there any modifications to llvm/clang necessary to get 3.1 to build properly? -------------------------------- Building llvm/clang 3.3 under Cygwin Step 1) CC=gcc CXX=g++ ../llvm3.3/configure make -j4 works just fine. This builds the debug with asserts. Not the sharpest knife in the drawer, but it builds. There is a warning during configure, 'mmap() of a fixed address required but not supported.' It appears to be a bug in the configure file. Performing a Google search one finds reports that mmap() is supported under Cygwin, but is not properly discovered. Step 2) Start again rm -r * CC=gcc CXX=g++ ../llvm3.3/configure --enable-optimized make -j4 works just fine. Step 3) make install No errors. Step 4) Build clang with clang rm -r * CC=clang CXX=clang ../llvm3.3/configure --enable-optimized make -j4 Now we get the following error. A lot more errors of similar nature. llvm[2]: Linking Release+Asserts executable FileUpdate (without symbols) /cygdrive/c/OpenSource/llvmbuild3-3/utils/FileUpdate/Release+Asserts/FileUpdate.o:fake:(.text+0x2e): undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Rep::_S_empty_rep_storage' /cygdrive/c/OpenSource/llvmbuild3-3/utils/FileUpdate/Release+Asserts/FileUpdate.o:fake:(.text+0x63): undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Rep::_M_destroy(std::allocator<char> const&)' Step 4a) Repeat without optimization. rm -r * CC=clang CXX=clang ../llvm3.3/configure make -j4 Similar errors. ------------------------------------------------------- Building llvm/clang 3.3 under Cygwin using cmake Now try all of the above, but this time use cmake. Unfortunately Cygwin no longer exports _WIN32, so it is defined below. It is required to get _YUGA_LITTLE_ENDIAN and _YUGA_BIG_ENDIAN defined in /compiler-rt/lib/int_endianness.h Step C1) CC=gcc CXX=g++ CMAKE_LEGACY_CYGWIN_WIN32=1 CMAKE_C_FLAGS="-D_WIN32=1" CMAKE_CXX_FLAGS="-D_WIN32=1" cmake ../llvm-3-3 Get the error /cygdrive/c/OpenSource/llvm-3-3/projects/compiler-rt/lib/int_endianness.h:106:2: error: #error Unable to determine endian Step C2) rm -r * CC=gcc CXX=g++ CMAKE_LEGACY_CYGWIN_WIN32=1 CMAKE_C_FLAGS="-D_YUGA_LITTLE_ENDIAN=1 -D_YUGA_BIG_ENDIAN=0" CMAKE_CXX_FLAGS="-D_YUGA_LITTLE_ENDIAN=1 -D_YUGA_BIG_ENDIAN=0" cmake ../llvm-3-3 Get same error. What am I doing wrong? Keith Smith -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
