Bump SCIP 6.0.0 -> 6.0.1

[Mizux]

Need to test the last SCIP 6.0.1 and update doc and code accordingly

SCIP Install

I'll only test the CMake based build of SCIP using the command:
SCIP download link: https://scip.zib.de/download.php?fname=scipoptsuite-6.0.1.tgz
SCIP install doc: https://scip.zib.de/doc/html/INSTALL.php

Unix:

cmake -H. -Bbuild -DSHARED=OFF -DGMP=OFF -DGCG=OFF -DSYM=none -DIPOPT=OFF -DREADLINE=OFF -DZIMPL=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_INSTALL_PREFIX=$HOME/scip
cmake --build build --target install
export UNIX_SCIP_DIR=$HOME/scip
cd <ortools_root_path>
make clean
make cc
make run SOURCE=examples/test/lp_test.cc
make python
make run SOURCE=examples/test/lp_test.py

Windows:

Tasks

Here the tasks to do to test SCIP (sciptoptsuite) 6.0.1

• Test SCIP on Linux
  • Test Makefile based build
  • Test CMake based SHARED build
  • Test CMake based STATIC build
  • Test or-tools Makefile based build integration
  • Test or-tools CMake based build integration (Postponed to v7.2)
  • Test or-tools Bazel based build integration
• Test SCIP on MacOS
  • Test Makefile based build
  • Test CMake based SHARED build
  • Test CMake based STATIC build
  • Test or-tools Makefile based build integration
  • Test or-tools CMake based build integration (Postponed to v7.2)
  • Test or-tools Bazel based build integration
• Test SCIP on Windows
  • Test Makefile based build
  • Test CMake based SHARED build
  • Test CMake based STATIC build
  • Test or-tools Makefile based build integration
  • Test or-tools CMake based build integration (Postponed to v7.2)
  • Test or-tools Bazel based build integration

note: currently SCIP is not supported in CMake-based build or Bazel-based build (PR welcome, or i'll do it later)

need to create a report like this: #948 (comment)

Related Issue

#1188 SCIP_interface use macros not available publicly
#1023 MacOS python package with SCIP support (in this case we should use SCIP static lib)

Annexe

• OR-Tools Makefile-based build integration

  • unix:
    

    or-tools/makefiles/Makefile.unix.mk

    Lines 97 to 100 in 4477092

    	ifdef UNIX_SCIP_DIR
    	SCIP_INC = -I$(UNIX_SCIP_DIR)/include -DUSE_SCIP
    	SCIP_SWIG = $(SCIP_INC)
    	endif

    • linux:
      

      or-tools/makefiles/Makefile.unix.mk

      Lines 129 to 136 in 4477092

      	ifdef UNIX_SCIP_DIR
      	SCIP_ARCH = linux.x86_64.gnu.opt
      	SCIP_LNK = \
      	$(UNIX_SCIP_DIR)/lib/libscip.a \
      	$(UNIX_SCIP_DIR)/lib/libscipopt.a \
      	$(UNIX_SCIP_DIR)/lib/libsoplex.a \
      	$(UNIX_SCIP_DIR)/lib/libsoplex.$(SCIP_ARCH).a
      	endif

    • macOS
      

      or-tools/makefiles/Makefile.unix.mk

      Lines 200 to 207 in 4477092

      	ifdef UNIX_SCIP_DIR
      	SCIP_ARCH = darwin.x86_64.gnu.opt
      	SCIP_LNK = \
      	-force_load $(UNIX_SCIP_DIR)/lib/libscip.a \
      	$(UNIX_SCIP_DIR)/lib/libscipopt.a \
      	$(UNIX_SCIP_DIR)/lib/libsoplex.a \
      	$(UNIX_SCIP_DIR)/lib/libsoplex.$(SCIP_ARCH).a
      	endif

  • Windows
    

    or-tools/makefiles/Makefile.win.mk

    Lines 117 to 125 in 4477092

    	# This is needed to find SCIP include files and libraries.
    	ifdef WINDOWS_SCIP_DIR
    	SCIP_INC = /I"$(WINDOWS_SCIP_DIR)\\include" /DUSE_SCIP
    	SCIP_SWIG = -I"$(WINDOWS_SCIP_DIR)/include" -DUSE_SCIP
    	STATIC_SCIP_LNK = \
    	"$(WINDOWS_SCIP_DIR)\\lib\\scip.lib" \
    	"$(WINDOWS_SCIP_DIR)\\lib\\soplex.lib" /ignore:4006
    	DYNAMIC_SCIP_LNK = $(STATIC_SCIP_LNK)
    	endif

[Mizux]

trying to build SCIP using:

FROM ubuntu:18.10
LABEL maintainer="corentinl@google.com"

RUN apt update -qq \
&& apt install -yq git build-essential zlib1g-dev cmake \
lsb-release pkg-config autoconf autotools-dev \
&& apt clean \
&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

WORKDIR /root

# Copy the scip archive
COPY scipoptsuite-6.0.1.tgz /root/scipoptsuite.tgz

RUN cd /tmp \
&& tar xzvf /root/scipoptsuite.tgz \
&& cd scipoptsuite-6.0.1 \
&& cmake -H. -Bbuild -DSHARED=OFF -DGMP=OFF -DGCG=OFF -DCMAKE_INSTALL_PREFIX=/scip \
&& cmake --build build \
&& cmake --build build --target install \
&& cd ..
&& rm -rf scip*

-> got libsoplex-pic.a but libscip.a

$ export UNIX_SCIP_DIR=$HOME/scip
$ make clean_cc
$ make cc
...
/usr/bin/ld: /usr/local/google/home/corentinl/scip/lib/libscip.a(cons_linear.c.o): relocation R_X86_64_PC32 against symbol `SCIPincludeConshdlrLinear' can not be used when making a shared object; recompile with -fPIC

[Mizux]

Seems to be fixed by:

cmake -H. -Bbuild -DSHARED=OFF -DGMP=OFF -DGCG=OFF -DSYM=none -DIPOPT=OFF -DREADLINE=OFF -DZIMPL=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_INSTALL_PREFIX=$HOME/scip

notice the -DCMAKE_POSITION_INDEPENDENT_CODE=ON