COMP: ccmake requires ncurses, according to Berk and since it doesn't build

on NetBSD where there are separate curses and ncurses libraries, and where
the curses library is found, which doesn't work for ccmake while the
existing ncurses library would work.
With this change it should be possible to test whether the found curses lib
provides ncurses functionality.

Alex

1 files changed, 73 insertions, 6 deletions

diff --git a/Modules/FindCurses.cmake b/Modules/FindCurses.cmake
index 1e53dbf..e4ca140 100644
--- a/Modules/FindCurses.cmake
+++ b/Modules/FindCurses.cmake
@@ -1,13 +1,72 @@
 # - Find the curses include file and library
 #
+#  CURSES_FOUND - system has Curses
+#  CURSES_INCLUDE_DIR - the Curses include directory
+#  CURSES_LIBRARIES - The libraries needed to use Curses
+#
+# Set CURSES_NEED_NCURSES to TRUE before the FIND_PACKAGE() command if NCurses 
+# functionality is required.
+
+FIND_LIBRARY(CURSES_CURSES_LIBRARY NAMES curses )
+
+FIND_LIBRARY(CURSES_NCURSES_LIBRARY NAMES ncurses )
+
+SET(CURSES_USE_NCURSES FALSE)
+
+IF(CURSES_NCURSES_LIBRARY  AND NOT  CURSES_CURSES_LIBRARY)
+  SET(CURSES_USE_NCURSES TRUE)
+ENDIF(CURSES_NCURSES_LIBRARY  AND NOT  CURSES_CURSES_LIBRARY)
+
+
+# Not sure the logic is correct here.
+# If NCurses is required, use the function wsyncup() to check if the library
+# has NCurses functionality (at least this is where it breaks on NetBSD).
+# If wsyncup is in curses, use this one.
+# If not, try to find ncurses and check if this has the symbol.
+# Once the ncurses library is found, search the ncurses.h header first, but
+# some web pages also say that even with ncurses there is not always a ncurses.h:
+# http://osdir.com/ml/gnome.apps.mc.devel/2002-06/msg00029.html
+# So at first try ncurses.h, if not found, try to find curses.h under the same
+# prefix as the library was found, if still not found, try curses.h with the 
+# default search paths.
+IF(CURSES_CURSES_LIBRARY  AND  CURSES_NEED_NCURSES)
+  INCLUDE(CheckLibraryExists)
+  CHECK_LIBRARY_EXISTS("${CURSES_CURSES_LIBRARY}" wsyncup "" CURSES_CURSES_HAS_WSYNCUP)
+
+  IF(CURSES_NCURSES_LIBRARY  AND NOT  CURSES_CURSES_HAS_WSYNCUP)
+    CHECK_LIBRARY_EXISTS("${CURSES_NCURSES_LIBRARY}" wsyncup "" CURSES_NCURSES_HAS_WSYNCUP)
+    IF( CURSES_NCURSES_HAS_WSYNCUP)
+      SET(CURSES_USE_NCURSES TRUE)
+    ENDIF( CURSES_NCURSES_HAS_WSYNCUP)
+  ENDIF(CURSES_NCURSES_LIBRARY  AND NOT  CURSES_CURSES_HAS_WSYNCUP)
+
+ENDIF(CURSES_CURSES_LIBRARY  AND  CURSES_NEED_NCURSES)
+
+
+IF(NOT CURSES_USE_NCURSES)
+  FIND_PATH(CURSES_CURSES_INCLUDE_PATH curses.h )
+  SET(CURSES_INCLUDE_PATH "${CURSES_CURSES_INCLUDE_PATH}")
+  SET(CURSES_LIBRARY "${CURSES_CURSES_LIBRARY}")
+  GET_FILENAME_COMPONENT(_cursesLibDir "${CURSES_CURSES_LIBRARY}" PATH)
+  GET_FILENAME_COMPONENT(_cursesParentDir "${_cursesLibDir}" PATH)
+ELSE(NOT CURSES_USE_NCURSES)
+# we need to find ncurses
+  FIND_PATH(CURSES_NCURSES_INCLUDE_PATH ncurses.h ncurses/ncurses.h  ncurses/curses.h)
+  GET_FILENAME_COMPONENT(_cursesLibDir "${CURSES_NCURSES_LIBRARY}" PATH)
+  GET_FILENAME_COMPONENT(_cursesParentDir "${_cursesLibDir}" PATH)
+  FIND_PATH(CURSES_NCURSES_INCLUDE_PATH curses.h  PATHS "${_cursesParentDir}/include" NO_DEFAULT_PATH)
+  FIND_PATH(CURSES_NCURSES_INCLUDE_PATH curses.h)
 
-FIND_PATH(CURSES_INCLUDE_PATH curses.h )
+  SET(CURSES_INCLUDE_PATH "${CURSES_NCURSES_INCLUDE_PATH}")
+  SET(CURSES_LIBRARY "${CURSES_NCURSES_LIBRARY}")
+ENDIF(NOT CURSES_USE_NCURSES)
 
-FIND_LIBRARY(CURSES_LIBRARY NAMES curses ncurses )
 
+FIND_LIBRARY(CURSES_EXTRA_LIBRARY cur_colr PATHS "${_cursesLibDir}" NO_DEFAULT_PATH)
 FIND_LIBRARY(CURSES_EXTRA_LIBRARY cur_colr )
 
-FIND_LIBRARY(FORM_LIBRARY form )
+FIND_LIBRARY(CURSES_FORM_LIBRARY form PATHS "${_cursesLibDir}" NO_DEFAULT_PATH)
+FIND_LIBRARY(CURSES_FORM_LIBRARY form )
 
 # Need to provide the *_LIBRARIES
 SET(CURSES_LIBRARIES ${CURSES_LIBRARY})
@@ -16,9 +75,9 @@ IF(CURSES_EXTRA_LIBRARY)
   SET(CURSES_LIBRARIES ${CURSES_LIBRARIES} ${CURSES_EXTRA_LIBRARY})
 ENDIF(CURSES_EXTRA_LIBRARY)
 
-IF(FORM_LIBRARY)
-  SET(CURSES_LIBRARIES ${CURSES_LIBRARIES} ${FORM_LIBRARY})
-ENDIF(FORM_LIBRARY)
+IF(CURSES_FORM_LIBRARY)
+  SET(CURSES_LIBRARIES ${CURSES_LIBRARIES} ${CURSES_FORM_LIBRARY})
+ENDIF(CURSES_FORM_LIBRARY)
 
 # Proper name is *_INCLUDE_DIR
 SET(CURSES_INCLUDE_DIR ${CURSES_INCLUDE_PATH})
@@ -28,13 +87,21 @@ SET(CURSES_INCLUDE_DIR ${CURSES_INCLUDE_PATH})
 INCLUDE(FindPackageHandleStandardArgs)
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(Curses DEFAULT_MSG CURSES_LIBRARY CURSES_INCLUDE_PATH)
 
+# for compatibility
+SET(FORM_LIBRARY "${CURSES_FORM_LIBRARY}")
 
 MARK_AS_ADVANCED(
   CURSES_INCLUDE_PATH
   CURSES_LIBRARY
+  CURSES_CURSES_INCLUDE_PATH
+  CURSES_CURSES_LIBRARY
+  CURSES_NCURSES_INCLUDE_PATH
+  CURSES_NCURSES_LIBRARY
   CURSES_EXTRA_LIBRARY
   FORM_LIBRARY
   CURSES_LIBRARIES
   CURSES_INCLUDE_DIR
+  CURSES_CURSES_HAS_WSYNCUP
+  CURSES_NCURSES_HAS_WSYNCUP
   )