Add support for lldb config.h and detect ncurses' include path

[krytarowski]

Summary

This change is required to get proper ncurses handling on NetBSD.

[krytarowski]

This ncurses header is now the blocker for buildslave.

[2817/3214] Building CXX object tools/lldb/source/Core/CMakeFiles/lldbCore.dir/IOHandler.cpp.o
FAILED: /usr/bin/g++   -DGTEST_HAS_RTTI=0 -DHAVE_ROUND -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 -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++11 -ffunction-sections -fdata-sections -Wno-deprecated-declarations -Wno-unknown-pragmas -Wno-deprecated-register -Wno-vla-extension  -fno-exceptions -fno-rtti -fPIC -fPIC  -DNDEBUG -Itools/lldb/source/Core -I/home/motus/build/build/llvm/tools/lldb/source/Core -I/home/motus/build/build/llvm/tools/lldb/include -Itools/lldb/include -Iinclude -I/home/motus/build/build/llvm/include -I/usr/pkg/include/python2.7 -I/home/motus/build/build/llvm/tools/lldb/../clang/include -Itools/lldb/../clang/include -I/home/motus/build/build/llvm/tools/lldb/source/.     -fno-exceptions -fno-rtti -MMD -MT tools/lldb/source/Core/CMakeFiles/lldbCore.dir/IOHandler.cpp.o -MF tools/lldb/source/Core/CMakeFiles/lldbCore.dir/IOHandler.cpp.o.d -o tools/lldb/source/Core/CMakeFiles/lldbCore.dir/IOHandler.cpp.o -c /home/motus/build/build/llvm/tools/lldb/source/Core/IOHandler.cpp
/home/motus/build/build/llvm/tools/lldb/source/Core/IOHandler.cpp:32:21: fatal error: ncurses.h: No such file or directory
 #include <ncurses.h>
                     ^
compilation terminated.
ninja: build stopped: subcommand failed.
program finished with exit code 1
elapsedTime=2238.962841

http://lab.llvm.org:8014/builders/lldb-amd64-ninja-netbsd7/builds/139/steps/ninja%20build%20local/logs/stdio

[krytarowski]

Closing. We are going for reuse of the NetBSD native curses(8) library.

The reason for it is limit of detecting ncurses on various systems. For example, Ubuntu ships with <curses.h> and linkage from <ncurses.h>, ncurses.h isn't detected by CMake. Detecting <curses.h> on NetBSD is reusing conflicting header from the host curses(8) and pkgsrc's ncurses library.

autoconf/configure.ac

 AC_LANG_POP([C++])
 
 AC_CHECK_HEADERS([dlfcn.h execinfo.h fcntl.h inttypes.h link.h])
 AC_CHECK_HEADERS([malloc.h setjmp.h signal.h stdint.h termios.h unistd.h])
 AC_CHECK_HEADERS([sys/mman.h sys/param.h sys/resource.h sys/time.h sys/uio.h])
 AC_CHECK_HEADERS([sys/ioctl.h malloc/malloc.h mach/mach.h])
 AC_CHECK_HEADERS([valgrind/valgrind.h])
 AC_CHECK_HEADERS([fenv.h])
+AC_CHECK_HEADERS([ncurses.h ncurses/ncurses.h])
 AC_CHECK_DECLS([FE_ALL_EXCEPT, FE_INEXACT], [], [], [[#include <fenv.h>]])
 if test "$LLVM_ENABLE_THREADS" -eq 1 && test "$ENABLE_PTHREADS" -eq 1 ; then
   AC_CHECK_HEADERS(pthread.h,
                    AC_SUBST(HAVE_PTHREAD, 1),
                    AC_SUBST(HAVE_PTHREAD, 0))
 else
   AC_SUBST(HAVE_PTHREAD, 0)
 fi

 
   dnl Use variables to stay under 80 columns.
   configh="include/clang/Config/config.h"
   doxy="docs/doxygen.cfg"
   AC_CONFIG_HEADERS([tools/clang/${configh}:${clang_src_root}/${configh}.in])
   AC_CONFIG_FILES([tools/clang/${doxy}:${clang_src_root}/${doxy}.in])
 fi
 
+dnl Configure lldb, if present
+if test "${lldb_src_root}" = ""; then
+  lldb_src_root="$srcdir/tools/lldb"
+fi
+if test -f ${lldb_src_root}/INSTALL.txt; then
+  dnl Use variables to stay under 80 columns.
+  configh="include/lldb/Config/config.h"
+  doxy="docs/doxygen.cfg"
+  AC_CONFIG_HEADERS([tools/lldb/${configh}:${lldb_src_root}/${configh}.in])
+  AC_CONFIG_FILES([tools/lldb/${doxy}:${lldb_src_root}/${doxy}.in])
+fi
+
 dnl OCaml findlib META file
 AC_CONFIG_FILES([bindings/ocaml/llvm/META.llvm])
 
 dnl Add --program-prefix value to Makefile.rules. Already an ARG variable.
 test "x$program_prefix" = "xNONE" && program_prefix=""
 AC_SUBST([program_prefix])