cmake support for /opt/local CUDD install

CMakeLists.txt

@@ -399,6 +399,7 @@ set(STA_TCL_FILES
   dcalc/DelayCalc.tcl
   parasitics/Parasitics.tcl
   sdf/Sdf.tcl
+  tcl/Compatibility.tcl
   verilog/Verilog.tcl
   )
 
@@ -431,12 +432,10 @@ endif()
 ################################################################
 #
 # Locate CUDD bdd packagte
-
+# -DCUDD=0 to not use CUDD.
-# CUDD variable has precidence over environment variable.
+# Look for library in CUDD/lib,     CUDD/cudd/lib
-if("${CUDD}" STREQUAL "")
+# Look for header  in CUDD/include, CUDD/cudd/include
-  set(CUDD $ENV{CUDD})
+#
-endif()
-
 if("${CUDD}" STREQUAL "" OR "${CUDD}" STREQUAL "0")
   set(CUDD_INCLUDE "")
   set(CUDD_LIB "")
@@ -444,12 +443,28 @@ if("${CUDD}" STREQUAL "" OR "${CUDD}" STREQUAL "0")
   set(CUDD 0)
   message(STATUS "CUDD library: not found")
 else()
-  set(CUDD_INCLUDE ${CUDD}/include)
+  find_library(CUDD_LIB NAMES cudd PATHS ${CUDD}/lib ${CUDD}/lib/cudd)
-  find_library(CUDD_LIB NAMES cudd PATHS ${CUDD}/lib)
   if (CUDD_LIB)
+    message(STATUS "CUDD library: ${CUDD_LIB}")
+    get_filename_component(CUDD_LIB_DIR "${CUDD_LIB}" PATH)
+    get_filename_component(CUDD_LIB_PARENT1 "${CUDD_LIB_DIR}" PATH)
+    get_filename_component(CUDD_LIB_PARENT2 "${CUDD_LIB_PARENT1}" PATH)
+    find_file(CUDD_HEADER cudd.h
+      PATHS ${CUDD}/include ${CUDD_LIB_PARENT2}/include/cudd)
+    if (CUDD_HEADER)
+      get_filename_component(CUDD_INCLUDE "${CUDD_HEADER}" PATH)
+      message(STATUS "CUDD header: ${CUDD_HEADER}")
       # CUDD referenced by StaConfig.hh.cmake
       set(CUDD 1)
-    message(STATUS "CUDD library: ${CUDD_LIB}")
+    else()
+      message(STATUS "CUDD header: not found")
+    endif()
+  else()
+    set(CUDD_INCLUDE "")
+    set(CUDD_LIB "")
+    set(CUDD_FOUND FALSE)
+    set(CUDD 0)
+    message(STATUS "CUDD library: not found")
   endif()
 endif()
 

README.md

@@ -86,20 +86,20 @@ bison    1.35    3.0.4   2.3
 flex     2.5.4   2.6.4   2.5.35
 ```
 
-These packages are optional:
+These packages are **optional**:
 
 ```
 libz     1.1.4   1.2.5     1.2.8
 cudd             2.4.1     3.0.0
 ```
 
-CUDD is a binary decision diageram (BDD) package that is used to improve conditional timing arc handling. It is available [here](https://www.davidkebo.com/source/cudd_versions/cudd-3.0.0.tar.gz) or [here](https://sourceforge.net/projects/cudd-mirror/).
+CUDD is a binary decision diageram (BDD) package that is used to improve conditional timing arc handling. OpenSTA does not require it to be installed. It is available [here](https://www.davidkebo.com/source/cudd_versions/cudd-3.0.0.tar.gz) or [here](https://sourceforge.net/projects/cudd-mirror/).
 
 Note that the file hierarchy of the CUDD installation changed with version 3.0.
-Some changes to the CMake are required to support older versions.
+Some changes to CMakeLists.txt are required to support older versions.
 
-You may use the `--prefix ` option to `configure` to install in a location other than
+When building CUDD you may use the `--prefix ` option to `configure` to
-the default (`/usr/local/lib`).
+install in a location other than the default (`/usr/local/lib`).
 ```
 cd $HOME/cudd-3.0.0
 mkdir $HOME/cudd
@@ -107,6 +107,21 @@ mkdir $HOME/cudd
 make
 make install
 ```
+To not use CUDD specify `CUDD=0`.
+Cmake looks for the CUDD library in `CUDD/lib, CUDD/cudd/lib`
+and for the header in `CUDD/include, CUDD/cudd/include`.
+```
+# equivalent to -DCUDD=0
+cmake ..                     
+or
+cmake .. -DCUDD=0
+or
+# look in ~/cudd/lib, ~/cudd/include
+cmake .. -DCUDD=$HOME/cudd
+or
+# look in /usr/local/lib/cudd, /usr/local/include/cudd
+cmake .. -DCUDD=/usr/local
+```
 
 The Zlib library is an optional.  If CMake finds libz, OpenSTA can
 read Verilog, SDF, SPF, and SPEF files compressed with gzip.
@@ -121,7 +136,7 @@ git clone https://xp-dev.com/git/opensta
 cd opensta
 mkdir build
 cd build
-cmake .. -DCUDD=$HOME/cudd
+cmake ..
 make
 ```
 The default build type is release to compile optimized code.
@@ -135,7 +150,7 @@ CMAKE_BUILD_TYPE DEBUG|RELEASE
 CMAKE_CXX_FLAGS - additional compiler flags
 TCL_LIB - path to tcl library
 TCL_HEADER - path to tcl.h
-CUDD - path to cudd installation ($HOME/cudd if following install shown above)
+CUDD - path to cudd installation
 ZLIB_ROOT - path to zlib
 CMAKE_INSTALL_PREFIX
 ```

search/Genclks.hh

@@ -14,22 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-// OpenSTA, Static Timing Analyzer
-// Copyright (c) 2019, Parallax Software, Inc.
-// 
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-// 
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-// 
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
 #ifndef STA_GENCLKS_H
 #define STA_GENCLKS_H