update install/build documentation & cmake updates:

- split install document into multiple files
- reorder chapters
- update msvc part (shortend add reference to OSGeo4W dependencies)
- update CMake files to look in $ENV{LIB} and $ENV{INCLUDE}


git-svn-id: http://svn.osgeo.org/qgis/trunk@14440 c8812cc2-4d05-0410-92ff-de0c093fc19c

cmake/FindFcgi.cmake

@@ -12,14 +12,16 @@ FIND_PATH(FCGI_INCLUDE_DIR
   /usr/include/fastcgi
   #MSVC
   "$ENV{LIB_DIR}/include"
+  $ENV{INCLUDE}
   #mingw
   c:/msys/local/include
   )
-FIND_LIBRARY(FCGI_LIBRARY NAMES fcgi PATHS 
+FIND_LIBRARY(FCGI_LIBRARY NAMES fcgi libfcgi PATHS 
   /usr/local/lib 
   /usr/lib 
   #MSVC
   "$ENV{LIB_DIR}/lib"
+  $ENV{LIB}
   #mingw
   c:/msys/local/lib
   )

cmake/FindGDAL.cmake

@@ -23,13 +23,9 @@ IF(WIN32)
   ENDIF (MINGW)
 
   IF (MSVC)
-    SET (
-       GDAL_INCLUDE_DIR 
-       "$ENV{LIB_DIR}/include/gdal"
-       CACHE STRING INTERNAL
-       )
+    FIND_PATH(GDAL_INCLUDE_DIR gdal.h "$ENV{LIB_DIR}/include/gdal" $ENV{INCLUDE})
     FIND_LIBRARY(GDAL_LIBRARY NAMES gdal gdal_i PATHS 
-      "$ENV{LIB_DIR}/lib" /usr/lib c:/msys/local/lib)
+	    "$ENV{LIB_DIR}/lib" $ENV{LIB} /usr/lib c:/msys/local/lib)
     IF (GDAL_LIBRARY)
       SET (
          GDAL_LIBRARY;odbc32;odbccp32 

cmake/FindGEOS.cmake

@@ -22,13 +22,10 @@ IF(WIN32)
   ENDIF (MINGW)
 
   IF (MSVC)
-    SET (
-       GEOS_INCLUDE_DIR 
-       "$ENV{LIB_DIR}/include"
-       CACHE STRING INTERNAL
-       )
+    FIND_PATH(GEOS_INCLUDE_DIR geos_c.h $ENV{LIB_DIR}/include $ENV{INCLUDE})
     FIND_LIBRARY(GEOS_LIBRARY NAMES geos geos_c_i PATHS 
-      "$ENV{LIB_DIR}/lib"
+      "$ENV{LIB}/lib"
+      $ENV{LIB}
       #mingw
       c:/msys/local/lib
       NO_DEFAULT_PATH

cmake/FindGRASS.cmake

@@ -44,7 +44,7 @@ ENDMACRO (CHECK_GRASS)
 # search for grass installations
 
 # list of paths which to search - user's choice as first
-SET (GRASS_PATHS ${GRASS_PREFIX} /usr/lib/grass c:/msys/local /opt/grass)
+SET (GRASS_PATHS ${GRASS_PREFIX} /usr/lib/grass c:/msys/local /opt/grass $ENV{GRASS_PREFIX})
 
 # mac-specific path
 IF (APPLE)

cmake/FindGSL.cmake

@@ -31,16 +31,19 @@ IF(WIN32)
   FIND_PATH(GSL_INCLUDE_DIR gsl/gsl_blas.h 
     ${GSL_MINGW_PREFIX}/include 
     ${GSL_MSVC_PREFIX}/include
+    $ENV{INCLUDE}
     )
 
   FIND_LIBRARY(GSL_LIB gsl PATHS 
     ${GSL_MINGW_PREFIX}/lib 
     ${GSL_MSVC_PREFIX}/lib
+    $ENV{LIB}
     )
 
   FIND_LIBRARY(GSLCBLAS_LIB gslcblas cblas PATHS 
     ${GSL_MINGW_PREFIX}/lib 
     ${GSL_MSVC_PREFIX}/lib
+    $ENV{LIB}
   )
 
   SET (GSL_LIBRARIES ${GSL_LIB} ${GSLCBLAS_LIB})
@@ -119,7 +122,7 @@ IF(GSL_LIBRARIES)
 
     SET(GSL_FOUND 1)
 
-    MESSAGE(STATUS "Using GSL from ${GSL_PREFIX}")
+    MESSAGE(STATUS "Found GSL: ${GSL_LIB}")
 
   ENDIF(GSL_INCLUDE_DIR OR GSL_CXX_FLAGS)
 ENDIF(GSL_LIBRARIES)

cmake/FindIconv.cmake

@@ -19,6 +19,7 @@
 # searching for the same item do nothing. 
 FIND_PATH(ICONV_INCLUDE_DIR iconv.h
   "$ENV{LIB_DIR}/include"
+  $ENV{INCLUDE}
   /usr/local/include
   /usr/include
   #mingw
@@ -29,6 +30,7 @@ FIND_PATH(ICONV_INCLUDE_DIR iconv.h)
 
 FIND_LIBRARY(ICONV_LIBRARY NAMES iconv PATHS
   "$ENV{LIB_DIR}/lib"
+  $ENV{LIB}
   /usr/local/lib
   /usr/lib
   #mingw

cmake/FindQWT.cmake

@@ -19,19 +19,22 @@ FIND_PATH(QWT_INCLUDE_DIR qwt.h
   /usr/include
   /usr/local/include
   "$ENV{LIB_DIR}/include" 
+  "$ENV{INCLUDE}" 
   PATH_SUFFIXES qwt-qt4 qwt
   )
-FIND_LIBRARY(QWT_LIBRARY qwt PATHS 
+FIND_LIBRARY(QWT_LIBRARY NAMES qwt qwtn5 PATHS 
   /usr/lib
   /usr/local/lib
   "$ENV{LIB_DIR}/lib" 
+  "$ENV{LIB}/lib" 
   )
 IF (NOT QWT_LIBRARY)
   # try using ubuntu lib naming
   FIND_LIBRARY(QWT_LIBRARY qwt-qt4 PATHS 
     /usr/lib
     /usr/local/lib
     "$ENV{LIB_DIR}/lib" 
+    "$ENV{LIB}/lib" 
     )
 ENDIF (NOT QWT_LIBRARY)