Target a minimal terminfo library rather than necessarily a full curses

library for color support detection. This still will use a curses
library if that is all we have available on the system. This change
tries to use a smaller subset of the curses library, specifically the
subset that is on some systems split off into a separate library. For
example, if you install ncurses configured --with-tinfo, a 'libtinfo' is
install that provides just the terminfo querying functionality. That
library is now used instead of curses when it is available.

This happens to fix a build error on systems with that library because
when we tried to link ncurses into the binary, we didn't pull tinfo in
as well. =]

It should also provide an easy path for supporting the NetBSD
libterminfo library, but as I don't have access to a NetBSD system I'm
leaving adding that support to those folks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188160 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 20 insertions, 21 deletions

diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index 0567820..13bd40d 100755
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -74,6 +74,7 @@ check_symbol_exists(FE_INEXACT "fenv.h" HAVE_DECL_FE_INEXACT)
 check_include_file(mach/mach.h HAVE_MACH_MACH_H)
 check_include_file(mach-o/dyld.h HAVE_MACH_O_DYLD_H)
 
+check_include_file(term.h HAVE_TERM_H)
 check_include_file(curses.h HAVE_CURSES_H)
 check_include_file(ncurses.h HAVE_NCURSES_H)
 check_include_file(ncursesw.h HAVE_NCURSESW_H)
@@ -103,18 +104,21 @@ if( NOT PURE_WINDOWS )
   else()
     set(HAVE_LIBZ 0)
   endif()
-  if(LLVM_ENABLE_CURSES)
-    check_library_exists(curses has_colors "" HAVE_CURSES)
-    if(NOT HAVE_CURSES)
-      check_library_exists(ncurses has_colors "" HAVE_NCURSES)
-      set(HAVE_CURSES ${HAVE_NCURSES})
-      if(NOT HAVE_CURSES)
-        check_library_exists(ncursesw has_colors "" HAVE_NCURSESW)
-        set(HAVE_CURSES ${HAVE_NCURSESW})
+  if(LLVM_ENABLE_TERMINFO AND
+     (HAVE_TERM_H OR HAVE_CURSES_H OR HAVE_NCURSES_H OR HAVE_NCURSESW_H OR
+      HAVE_NCURSES_CURSES_H OR HAVE_NCURSESW_CURSES_H))
+    set(HAVE_TERMINFO 0)
+    foreach(library tinfo curses ncurses ncursesw)
+      string(TOUPPER ${library} library_suffix)
+      check_library_exists(${library} setupterm "" HAVE_TERMINFO_${library_suffix})
+      if(HAVE_TERMINFO_${library_suffix})
+        set(HAVE_TERMINFO 1)
+        set(TERMINFO_LIBS "${library}")
+        break()
       endif()
-    endif()
+    endforeach()
   else()
-    set(HAVE_CURSES 0)
+    set(HAVE_TERMINFO 0)
   endif()
 endif()
 
diff --git a/cmake/modules/LLVM-Config.cmake b/cmake/modules/LLVM-Config.cmake
index 3e2447a..9fa45ce 100644
--- a/cmake/modules/LLVM-Config.cmake
+++ b/cmake/modules/LLVM-Config.cmake
@@ -10,13 +10,9 @@ function(get_system_libs return_var)
       if( HAVE_LIBDL )
         set(system_libs ${system_libs} ${CMAKE_DL_LIBS})
       endif()
-      if(LLVM_ENABLE_CURSES)
-        if(HAVE_NCURSESW)
-          set(system_libs ${system_libs} ncursesw)
-        elseif(HAVE_NCURSES)
-          set(system_libs ${system_libs} ncurses)
-        elseif(HAVE_CURSES)
-          set(system_libs ${system_libs} curses)
+      if(LLVM_ENABLE_TERMINFO)
+        if(HAVE_TERMINFO)
+          set(system_libs ${system_libs} ${TERMINFO_LIBS})
         endif()
       endif()
       if( LLVM_ENABLE_THREADS AND HAVE_LIBPTHREAD )
diff --git a/cmake/modules/LLVMConfig.cmake.in b/cmake/modules/LLVMConfig.cmake.in
index d87e242..68fe296 100644
--- a/cmake/modules/LLVMConfig.cmake.in
+++ b/cmake/modules/LLVMConfig.cmake.in
@@ -20,7 +20,7 @@ set(TARGET_TRIPLE "@TARGET_TRIPLE@")
 
 set(LLVM_TOOLS_BINARY_DIR @LLVM_TOOLS_BINARY_DIR@)
 
-set(LLVM_ENABLE_CURSES @LLVM_ENABLE_CURSES@)
+set(LLVM_ENABLE_TERMINFO @LLVM_ENABLE_TERMINFO@)
 
 set(LLVM_ENABLE_THREADS @LLVM_ENABLE_THREADS@)
 
@@ -30,9 +30,8 @@ set(LLVM_NATIVE_ARCH @LLVM_NATIVE_ARCH@)
 
 set(LLVM_ENABLE_PIC @LLVM_ENABLE_PIC@)
 
-set(HAVE_CURSES @HAVE_CURSES@)
-set(HAVE_NCURSES @HAVE_NCURSES@)
-set(HAVE_NCURSESW @HAVE_NCURSESW@)
+set(HAVE_TERMINFO @HAVE_TERMINFO@)
+set(TERMINFO_LIBS @TERMINFO_LIBS@)
 set(HAVE_LIBDL @HAVE_LIBDL@)
 set(HAVE_LIBPTHREAD @HAVE_LIBPTHREAD@)
 set(HAVE_LIBZ @HAVE_LIBZ@)