Makefile

#* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *#
#*                                                                           *#
#*                  This file is part of the class library                   *#
#*       SoPlex --- the Sequential object-oriented simPlex.                  *#
#*                                                                           *#
#*  Copyright (c) 1996-2024 Zuse Institute Berlin (ZIB)                      *#
#*                                                                           *#
#*  Licensed under the Apache License, Version 2.0 (the "License");          *#
#*  you may not use this file except in compliance with the License.         *#
#*  You may obtain a copy of the License at                                  *#
#*                                                                           *#
#*      http://www.apache.org/licenses/LICENSE-2.0                           *#
#*                                                                           *#
#*  Unless required by applicable law or agreed to in writing, software      *#
#*  distributed under the License is distributed on an "AS IS" BASIS,        *#
#*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *#
#*  See the License for the specific language governing permissions and      *#
#*  limitations under the License.                                           *#
#*                                                                           *#
#*  You should have received a copy of the Apache-2.0 license                *#
#*  along with SoPlex; see the file LICENSE. If not email soplex@zib.de.     *#
#*                                                                           *#
#* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *#

#@file    Makefile
#@brief   SoPlex Makefile
#@author  Thorsten Koch
#@author  Ambros Gleixner

#-----------------------------------------------------------------------------
# paths variables
#-----------------------------------------------------------------------------

# define to be able to locate library files
ifeq ($(OSTYPE),mingw)
SPXDIR		=	./
else
SPXDIR		=	$(realpath .)
endif

INSTALLDIR	=

#-----------------------------------------------------------------------------
# detect host architecture
#-----------------------------------------------------------------------------

include make/make.detecthost


#-----------------------------------------------------------------------------
# default settings
#-----------------------------------------------------------------------------

VERSION		:=	8.0.0.0
SPXGITHASH	=

VERBOSE		=	false
SHARED		=	false
OPT		=	opt
STATICLIBEXT	=	a
SHAREDLIBEXT	=	so
LIBEXT		=	$(STATICLIBEXT)
EXEEXTENSION	=
TEST		=	quick
ALGO		=  1 2 3 4
LIMIT		=  #
SETTINGS	=	default
TIME		=	3600
OUTPUTDIR	=	results
SEEDS		=	0
MAKESOFTLINKS	=	true
SOFTLINKS	=
LINKSINFO	=

# these variables are needed for cluster runs
MEM		=	2000
CONTINUE	=	false

# is it allowed to link to external open source libraries?
OPENSOURCE	=	true

GMP      =  true
MPFR     =  false
ZLIB     =  true
BOOST    =  true
QUADMATH =  false

COMP		=	gnu
CXX		=	g++
CXX_c		=	-c # the trailing space is important
CXX_o		=	-o # the trailing space is important
LINKCXX		=	$(CXX)
LINKCXX_L	=	-L
LINKCXX_l	=	-l
LINKCXX_o	=	-o # the trailing space is important
LINKLIBSUFFIX	=
DCXX		=	$(CXX)
LINT		=	flexelint
AR		=	ar
AR_o		=
RANLIB		=	ranlib
DOXY		=	doxygen

READ		=	read -e
LN_s		=	ln -s

LIBBUILD	=	$(AR)
LIBBUILD_o	=	$(AR_o)
LIBBUILDFLAGS	=       $(ARFLAGS)

CPPFLAGS	=	-Isrc
CXXFLAGS	=
BINOFLAGS	=
LIBOFLAGS	=
LDFLAGS		=
ARFLAGS		=	cr
DFLAGS		=	-MM

GMP_LDFLAGS	= 	-lgmp
GMP_CPPFLAGS	=
QUADMATH_LDFLAGS = 	-lquadmath

SOPLEXDIR	=	$(realpath .)
SRCDIR		=	src
BINDIR		=	bin
LIBDIR		=	lib
INCLUDEDIR	=	include
NAME		   =	soplex

LIBOBJ = 	soplex/didxset.o \
				soplex/idxset.o \
				soplex/mpsinput.o \
				soplex/nameset.o \
				soplex/spxdefines.o \
				soplex/spxgithash.o \
				soplex/spxid.o \
				soplex/spxout.o \
				soplex/usertimer.o \
				soplex/wallclocktimer.o

BINOBJ		=	soplexmain.o
EXAMPLEOBJ	=	example.o
LIBCOBJ		=	soplex_interface.o
REPOSIT		=	# template repository, explicitly empty  #spxproof.o

BASE		=	$(OSTYPE).$(ARCH).$(COMP).$(OPT)

LINKSMARKERFILE	=	$(LIBDIR)/linkscreated.$(OSTYPE).$(ARCH).$(COMP)$(LINKLIBSUFFIX)
LASTSETTINGS	=	$(OBJDIR)/make.lastsettings

SPXGITHASHFILE	=	$(SRCDIR)/soplex/git_hash.cpp
CONFIGFILE = $(SRCDIR)/soplex/config.h

#------------------------------------------------------------------------------
#--- NOTHING TO CHANGE FROM HERE ON -------------------------------------------
#------------------------------------------------------------------------------

GCCWARN		=	-pedantic -Wall -W -Wpointer-arith -Wcast-align -Wwrite-strings \
			-Wconversion -Wsign-compare -Wshadow \
			-Wredundant-decls -Wdisabled-optimization \
			-Wnon-virtual-dtor -Wreorder \
			-Woverloaded-virtual -Wsign-promo -Wsynth -Wundef \
			-Wcast-qual \
			-Wmissing-declarations \
			-Wzero-as-null-pointer-constant \
			-Wno-unused-parameter -Wno-strict-overflow -Wno-long-long \
			-Wno-sign-conversion -Wno-enum-enum-conversion
#			-Wold-style-cast
#			-Weffc++

ifeq ($(COMP),gnu)
GCCWARN += -Wno-use-after-free -Wno-stringop-overflow
endif


#-----------------------------------------------------------------------------
include make/make.$(BASE)
-include make/local/make.$(HOSTNAME)
-include make/local/make.$(HOSTNAME).$(COMP)
-include make/local/make.$(HOSTNAME).$(COMP).$(OPT)
#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------
# SHARED Libaries
#-----------------------------------------------------------------------------

ifeq ($(SHARED),true)
CPPFLAGS	+=	-fPIC
LIBBUILD	=	$(LINKCXX)
ARFLAGS		=
RANLIB		=
ifeq ($(COMP),msvc)
LIBEXT		=	dll
LIBBUILDFLAGS	+=      -dll
LIBBUILD_o	= 	-out:
else
LIBEXT		=	$(SHAREDLIBEXT)
LIBBUILDFLAGS	+=      -shared
LIBBUILD_o	= 	-o # the trailing space is important
LINKRPATH	=	-Wl,-rpath,
endif
endif

CPPFLAGS	+=	$(USRCPPFLAGS)
CXXFLAGS	+=	$(USRCXXFLAGS)
LDFLAGS		+=	$(USRLDFLAGS)
ARFLAGS		+=	$(USRARFLAGS)
DFLAGS		+=	$(USRDFLAGS)

#-----------------------------------------------------------------------------
# Main Program
#-----------------------------------------------------------------------------

BINNAME		=	$(NAME)-$(VERSION).$(BASE)
EXAMPLENAME	=	example.$(BASE)
LIBNAME		=	$(NAME)-$(VERSION).$(BASE)
BINFILE		=	$(BINDIR)/$(BINNAME)$(EXEEXTENSION)
EXECUTABLE	=	$(BINFILE)
EXAMPLEFILE	=	$(BINDIR)/$(EXAMPLENAME)$(EXEEXTENSION)
LIBFILE		=	$(LIBDIR)/lib$(LIBNAME).$(LIBEXT)
LIBSHORTLINK	=	$(LIBDIR)/lib$(NAME).$(LIBEXT)
LIBLINK		=	$(LIBDIR)/lib$(NAME).$(BASE).$(LIBEXT)

LIBCFILE	=	$(LIBDIR)/lib$(NAME)c-$(VERSION).$(BASE).$(LIBEXT)
LIBCSHORTLINK	=	$(LIBDIR)/lib$(NAME)c.$(LIBEXT)
LIBCLINK	=	$(LIBDIR)/lib$(NAME)c.$(BASE).$(LIBEXT)

BINLINK		=	$(BINDIR)/$(NAME).$(BASE)$(EXEEXTENSION)
BINSHORTLINK	=	$(BINDIR)/$(NAME)$(EXEEXTENSION)
DEPEND		=	src/depend

OBJDIR		=	obj/O.$(BASE)
BINOBJDIR	=	$(OBJDIR)/bin
LIBOBJDIR	=	$(OBJDIR)/lib
LIBOBJSUBDIR = 	$(LIBOBJDIR)/soplex
BINOBJFILES	=	$(addprefix $(BINOBJDIR)/,$(BINOBJ))
EXAMPLEOBJFILES	=	$(addprefix $(BINOBJDIR)/,$(EXAMPLEOBJ))
LIBOBJFILES	=	$(addprefix $(LIBOBJDIR)/,$(LIBOBJ))
LIBCOBJFILES	=	$(addprefix $(LIBOBJDIR)/,$(LIBCOBJ))
BINSRC		=	$(addprefix $(SRCDIR)/,$(BINOBJ:.o=.cpp))
EXAMPLESRC	=	$(addprefix $(SRCDIR)/,$(EXAMPLEOBJ:.o=.cpp))
LIBSRC		=	$(addprefix $(SRCDIR)/,$(LIBOBJ:.o=.cpp))
ALLSRC		=	$(BINSRC) $(EXAMPLESRC) $(LIBSRC)

#-----------------------------------------------------------------------------
# External Libraries
#-----------------------------------------------------------------------------

# check if it is allowed to link to external open source libraries
ifeq ($(OPENSOURCE), false)
	override ZLIB	=	false
	override GMP	=	false
endif

GMPDEP	:=	$(SRCDIR)/depend.gmp
GMPSRC	:=	$(shell cat $(GMPDEP))
ifeq ($(GMP),true)
CPPFLAGS	+= $(GMP_CPPFLAGS)
LDFLAGS	+= $(GMP_LDFLAGS)
else
GMP_LDFLAGS	=
GMP_CPPFLAGS	=
endif

ifeq ($(MPFR),true)
LDFLAGS += -lmpfr
else
# Flags for cpp mpf
endif

# For boost program options
ifeq ($(BOOST),true)
	LDFLAGS += $(BOOST_LDFLAGS)
else
		BOOST_LDFLAGS =
endif

# For quadmath support
ifeq ($(QUADMATH),true)
	LDFLAGS += $(QUADMATH_LDFLAGS)
else
	QUADMATH_LDFLAGS =
endif


ZLIBDEP		:=	$(SRCDIR)/depend.zlib
ZLIBSRC		:=	$(shell cat $(ZLIBDEP))
ifeq ($(ZLIB_LDFLAGS),)
ZLIB		=	false
endif
ifeq ($(ZLIB),true)
FLAGS	+= $(ZLIB_FLAGS)
LDFLAGS		+=	$(ZLIB_LDFLAGS)
else
ZLIB_LDFLAGS	=
ZLIB_FLAGS	=
endif

ifeq ($(GMP),true)
ifeq ($(COMP),msvc)
SOFTLINKS	+=	$(LIBDIR)/mpir.$(ARCH)
SOFTLINKS	+=	$(LIBDIR)/libmpir.$(ARCH).$(OPT).lib
LINKSINFO	+=	"\n  -> \"mpir.$(ARCH)\" is a directory containing the mpir installation, i.e., \"mpir.$(ARCH)/gmp.h\" should exist.\n"
LINKSINFO	+=	" -> \"libmpir.*\" is the path to the MPIR library\n"
endif
endif

ifeq ($(SHARED),true)
EXT_LIBS	= $(ZLIB_LDFLAGS) $(GMP_LDFLAGS) $(BOOST_LDFLAGS) $(QUADMATH_LDFLAGS)
endif


#-----------------------------------------------------------------------------
# Rules
#-----------------------------------------------------------------------------

ifeq ($(VERBOSE),false)
.SILENT:	$(LIBLINK) $(LIBSHORTLINK) $(BINLINK) $(BINSHORTLINK) $(BINFILE) example $(EXAMPLEOBJFILES) $(LIBFILE) $(LIBCFILE) $(BINOBJFILES) $(LIBOBJFILES)
MAKE		+= -s
endif

.PHONY: all
all:		makelibfile
		@$(MAKE) $(BINFILE) $(LIBLINK) $(LIBSHORTLINK) $(BINLINK) $(BINSHORTLINK)

.PHONY: preprocess
preprocess:	checkdefines
ifneq ($(SOFTLINKS),)
		@$(SHELL) -ec 'if test ! -e $(LINKSMARKERFILE) ; \
			then \
				echo "-> generating necessary links" ; \
				$(MAKE) -j1 $(LINKSMARKERFILE) ; \
			fi'
endif
		@$(MAKE) touchexternal

$(LIBLINK) $(LIBSHORTLINK):	$(LIBFILE)
		@rm -f $@
		cd $(dir $@) && $(LN_s) $(notdir $(LIBFILE)) $(notdir $@)

$(LIBCLINK) $(LIBCSHORTLINK):	$(LIBCFILE)
		@rm -f $@
		cd $(dir $@) && $(LN_s) $(notdir $(LIBCFILE)) $(notdir $@)

$(BINLINK) $(BINSHORTLINK):	$(BINFILE)
		@rm -f $@
		cd $(dir $@) && $(LN_s) $(notdir $(BINFILE)) $(notdir $@)

ifeq ($(SHARED),true)
$(BINFILE):	$(LIBFILE) $(BINOBJFILES) | $(BINDIR) $(BINOBJDIR)
		@echo "-> linking $@"
		$(LINKCXX) $(BINOBJFILES) \
		$(LDFLAGS) $(LINKCXX_L)$(LIBDIR) $(LINKRPATH)\$$ORIGIN/../$(LIBDIR) $(LINKCXX_l)$(LIBNAME) $(LINKCXX_o)$@ \
		|| ($(MAKE) errorhints && false)
else
$(BINFILE):	$(LIBOBJFILES) $(BINOBJFILES) | $(BINDIR) $(BINOBJDIR)
		@echo "-> linking $@"
		$(LINKCXX) $(BINOBJFILES) $(LIBOBJFILES) \
		$(LDFLAGS) $(LINKCXX_o)$@ \
		|| ($(MAKE) errorhints && false)
endif

.PHONY: example
example:	$(LIBOBJFILES) $(EXAMPLEOBJFILES) | $(BINDIR) $(EXAMPLEOBJDIR)
		@echo "-> linking $(EXAMPLEFILE)"
		$(LINKCXX) $(EXAMPLEOBJFILES) $(LIBOBJFILES) \
		$(LDFLAGS) $(LINKCXX_o)$(EXAMPLEFILE) \
		|| ($(MAKE) errorhints && false)

.PHONY: makelibfile
makelibfile:	preprocess
		@$(MAKE) $(LIBFILE) $(LIBLINK) $(LIBSHORTLINK)

.PHONY: makelibcfile
makelibcfile: preprocess
		@$(MAKE) $(LIBCFILE) $(LIBCSHAREDLINK) $(LIBCSHORTLINK)

# original library
$(LIBFILE):	$(LIBOBJFILES) | $(LIBDIR) $(LIBOBJDIR)
		@echo "-> generating library $@"
		-rm -f $(LIBFILE)
ifeq ($(SHARED),true)
		$(LIBBUILD) $(LIBBUILDFLAGS) $(LIBBUILD_o)$@ $(LIBOBJFILES) $(REPOSIT) $(LDFLAGS)
else
		$(LIBBUILD) $(LIBBUILDFLAGS) $(LIBBUILD_o)$@ $(LIBOBJFILES) $(REPOSIT)
endif
ifneq ($(RANLIB),)
		$(RANLIB) $@
endif

# C interface
$(LIBCFILE): $(LIBOBJFILES) $(LIBCOBJFILES) | $(LIBDIR) $(LIBOBJDIR)
		@echo "-> generating library $@"
		-rm -f $(LIBCFILE)
ifeq ($(SHARED),true)
		$(LIBBUILD) $(LIBBUILDFLAGS) $(LIBBUILD_o)$@ $(LIBOBJFILES) $(LIBCOBJFILES) $(REPOSIT) $(LDFLAGS)
else
		$(LIBBUILD) $(LIBBUILDFLAGS) $(LIBBUILD_o)$@ $(LIBOBJFILES) $(LIBCOBJFILES) $(REPOSIT)
endif
ifneq ($(RANLIB),)
		$(RANLIB) $@
endif

# include target to detect the current git hash
-include make/local/make.detectgithash

# this empty target is needed for the SoPlex release versions
githash::	# do not remove the double-colon

# include local targets
-include make/local/make.targets

# include install targets
-include make/make.install

.PHONY: lint
lint:		$(BINSRC) $(LIBSRC)
		-rm -f lint.out
ifeq ($(FILES),)
		$(LINT) lint/$(NAME).lnt +os\(lint.out\) -u -zero -Isrc -I/usr/include -e322 -UNDEBUG $^
else
		$(LINT) lint/$(NAME).lnt +os\(lint.out\) -u -zero -Isrc -I/usr/include -e322 -UNDEBUG $(FILES)
endif

.PHONY: doc
doc:
		cd doc; $(SHELL) builddoc.sh

.PHONY: test
test:		#$(BINFILE)
		cd check; ./test.sh $(TEST) $(EXECUTABLE) $(SETTINGS) $(TIME) $(OUTPUTDIR) $(SEEDS)

.PHONY: check
check:	#$(BINFILE)
		cd check; ./check.sh $(EXECUTABLE) $(OUTPUTDIR)

.PHONY: cleanbin
cleanbin:	| $(BINDIR)
		@echo "remove binary $(BINFILE)"
		@-rm -f $(BINFILE) $(BINLINK) $(BINSHORTLINK)

.PHONY: cleanlib
cleanlib:	| $(LIBDIR)
		@echo "remove library $(LIBFILE)"
		@-rm -f $(LIBFILE) $(LIBLINK) $(LIBSHORTLINK)

.PHONY: clean
clean:          cleanlib cleanbin | $(LIBOBJDIR) $(BINOBJDIR) $(OBJDIR)
		@echo "remove objective files"
ifneq ($(LIBOBJSUBDIR),)
		@-rm -f $(LIBOBJSUBDIR)/*.o && rmdir $(LIBOBJSUBDIR)
endif
ifneq ($(LIBOBJDIR),)
		@-rm -f $(LIBOBJDIR)/*.o && rmdir $(LIBOBJDIR)
endif
ifneq ($(BINOBJDIR),)
		@-rm -f $(BINOBJDIR)/*.o && rmdir $(BINOBJDIR)
endif
ifneq ($(OBJDIR),)
		@-rm -f $(LASTSETTINGS)
		@-rm -f $(CONFIGFILE)
		@-rmdir $(OBJDIR)
endif
		@-rm -f $(EXAMPLEFILE)

vimtags:
		-ctags -o TAGS src/*.cpp src/*.h src/soplex/*.cpp src/soplex/*.h

etags:
		-ctags -e -o TAGS src/*.cpp src/*.h src/soplex/*.cpp src/soplex/*.h

$(OBJDIR):
		@-mkdir -p $(OBJDIR)

$(BINOBJDIR):	| $(OBJDIR)
		@-mkdir -p $(BINOBJDIR)

$(LIBOBJDIR):	| $(OBJDIR)
		@-mkdir -p $(LIBOBJSUBDIR)

$(BINDIR):
		@-mkdir -p $(BINDIR)

$(LIBDIR):
		@-mkdir -p $(LIBDIR)

.PHONY: depend
depend:
		$(SHELL) -ec '$(DCXX) $(DFLAGS) $(FLAGS) $(CPPFLAGS) $(CXXFLAGS)\
		$(BINSRC:.o=.cpp) \
		| sed '\''s|^\([0-9A-Za-z_]\{1,\}\)\.o|$$\(BINOBJDIR\)/\1.o|g'\'' \
		>$(DEPEND)'
		$(SHELL) -ec '$(DCXX) $(DFLAGS) $(FLAGS) $(CPPFLAGS) $(CXXFLAGS)\
		$(EXAMPLESRC:.o=.cpp) \
		| sed '\''s|^\([0-9A-Za-z_]\{1,\}\)\.o|$$\(BINOBJDIR\)/\1.o|g'\'' \
		>>$(DEPEND)'
		$(SHELL) -ec '$(DCXX) $(DFLAGS) $(FLAGS) $(CPPFLAGS) $(CXXFLAGS)\
		$(LIBSRC:.o=.cpp) \
		| sed '\''s|^\([0-9A-Za-z_]\{1,\}\)\.o|$$\(LIBOBJDIR\)/\1.o|g'\'' \
		>>$(DEPEND)'
		$(SHELL) -ec '$(DCXX) $(DFLAGS) $(FLAGS) $(CPPFLAGS) $(CXXFLAGS)\
		$(LIBSRC:.o=.cpp) \
		| sed '\''s|^\([0-9A-Za-z_]\{1,\}\)\.o|$$\(LIBOBJSUBDIR\)/\1.o|g'\'' \
		>>$(DEPEND)'
		@echo `grep -l "SOPLEX_WITH_GMP" $(ALLSRC)` >$(GMPDEP)
		@echo `grep -l "SOPLEX_WITH_ZLIB" $(ALLSRC)` >$(ZLIBDEP)

-include	$(DEPEND)

$(BINOBJDIR)/%.o:	$(SRCDIR)/%.cpp
		@-mkdir -p $(BINOBJDIR)
		@echo "-> compiling $@"
		$(CXX) $(FLAGS) $(CPPFLAGS) $(CXXFLAGS) $(BINOFLAGS) $(CXX_c)$< $(CXX_o)$@

$(LIBOBJDIR)/%.o:	$(SRCDIR)/%.cpp
		@-mkdir -p $(LIBOBJSUBDIR)
		@echo "-> compiling $@"
		$(CXX) $(FLAGS) $(CPPFLAGS) $(CXXFLAGS) $(LIBOFLAGS) $(CXX_c)$< $(CXX_o)$@


-include $(LASTSETTINGS)

.PHONY: touchexternal
touchexternal:	$(GMPDEP) $(ZLIBDEP)| $(OBJDIR)
		@rm -f $(CONFIGFILE)
		@echo "#ifndef __SPXCONFIG_H__" >> $(CONFIGFILE)
		@echo "#define __SPXCONFIG_H__" >> $(CONFIGFILE)
ifneq ($(SPXGITHASH),$(LAST_SPXGITHASH))
		@-$(MAKE) githash
endif
		@$(SHELL) -ec 'if test ! -e $(SPXGITHASHFILE) ; \
			then \
				echo "-> generating $(SPXGITHASHFILE)" ; \
				$(MAKE) githash ; \
			fi'
ifneq ($(GMP),$(LAST_GMP))
		@-touch $(GMPSRC)
endif
ifneq ($(ZLIB),$(LAST_ZLIB))
		@-touch $(ZLIBSRC)
endif
ifneq ($(SHARED),$(LAST_SHARED))
		@-touch $(LIBSRC)
		@-touch $(BINSRC)
endif
ifneq ($(SANITIZE),$(LAST_SANITIZE))
		@-touch $(LIBSRC)
		@-touch $(BINSRC)
endif
ifneq ($(USRCXXFLAGS),$(LAST_USRCXXFLAGS))
		@-touch $(LIBSRC)
		@-touch $(BINSRC)
endif
ifneq ($(USRCPPFLAGS),$(LAST_USRCPPFLAGS))
		@-touch $(LIBSRC)
		@-touch $(BINSRC)
endif
ifneq ($(USRLDFLAGS),$(LAST_USRLDFLAGS))
		@-touch -c $(EXAMPLEOBJFILES) $(BINOBJFILES) $(LIBOBJFILES)
endif
ifneq ($(USRARFLAGS),$(LAST_USRARFLAGS))
		@-touch -c $(EXAMPLEOBJFILES) $(BINOBJFILES) $(LIBOBJFILES)
endif
		@-rm -f $(LASTSETTINGS)
		@echo "LAST_SPXGITHASH=$(SPXGITHASH)" >> $(LASTSETTINGS)
		@echo "LAST_GMP=$(GMP)" >> $(LASTSETTINGS)
		@echo "LAST_ZLIB=$(ZLIB)" >> $(LASTSETTINGS)
		@echo "LAST_SHARED=$(SHARED)" >> $(LASTSETTINGS)
		@echo "LAST_SANITIZE=$(SANITIZE)" >> $(LASTSETTINGS)
		@echo "LAST_USRCXXFLAGS=$(USRCXXFLAGS)" >> $(LASTSETTINGS)
		@echo "LAST_USRCPPFLAGS=$(USRCPPFLAGS)" >> $(LASTSETTINGS)
		@echo "LAST_USRLDFLAGS=$(USRLDFLAGS)" >> $(LASTSETTINGS)
		@echo "LAST_USRARFLAGS=$(USRARFLAGS)" >> $(LASTSETTINGS)
		@echo "LAST_USRDFLAGS=$(USRDFLAGS)" >> $(LASTSETTINGS)
ifeq ($(GMP), true)
		@echo "#define SOPLEX_WITH_GMP" >> $(CONFIGFILE)
endif
ifeq ($(BOOST), true)
		@echo "#define SOPLEX_WITH_BOOST" >> $(CONFIGFILE)
ifneq ($(MPFR), true)
		@echo "#define SOPLEX_WITH_CPPMPF" >> $(CONFIGFILE)
endif
endif
ifeq ($(MPFR), true)
		@echo "#define SOPLEX_WITH_MPFR" >> $(CONFIGFILE)
endif
ifeq ($(QUADMATH), true)
		@echo "#define SOPLEX_WITH_FLOAT128" >> $(CONFIGFILE)
endif
ifeq ($(ZLIB), true)
		@echo "#define SOPLEX_WITH_ZLIB" >> $(CONFIGFILE)
endif
		@echo "#endif" >> $(CONFIGFILE)


$(LINKSMARKERFILE):
		@$(MAKE) links

.PHONY: links
links:		| $(LIBDIR) echosoftlinks $(SOFTLINKS)
		@rm -f $(LINKSMARKERFILE)
		@echo "this is only a marker" > $(LINKSMARKERFILE)

.PHONY: echosoftlinks
echosoftlinks:
		@echo
		@echo "- Current settings: OSTYPE=$(OSTYPE) ARCH=$(ARCH) COMP=$(COMP) SUFFIX=$(LINKLIBSUFFIX)"
		@echo
		@echo "* SoPlex needs some softlinks to external programs."
		@echo "* Please insert the paths to the corresponding directories/libraries below."
		@echo "* The links will be installed in the 'lib' directory."
		@echo "* For more information and if you experience problems see the INSTALL file."
		@echo
		@echo -e $(LINKSINFO)

.PHONY: $(SOFTLINKS)
$(SOFTLINKS):
ifeq ($(MAKESOFTLINKS), true)
		@$(SHELL) -ec 'if test ! -e $@ ; \
			then \
				DIRNAME=`dirname $@` ; \
				BASENAMEA=`basename $@ .$(STATICLIBEXT)` ; \
				BASENAMESO=`basename $@ .$(SHAREDLIBEXT)` ; \
				echo ; \
				echo "- preparing missing soft-link \"$@\":" ; \
				if test -e $$DIRNAME/$$BASENAMEA.$(SHAREDLIBEXT) ; \
				then \
					echo "* this soft-link is not necessarily needed since \"$$DIRNAME/$$BASENAMEA.$(SHAREDLIBEXT)\" already exists - press return to skip" ; \
				fi ; \
				if test -e $$DIRNAME/$$BASENAMESO.$(STATICLIBEXT) ; \
				then \
					echo "* this soft-link is not necessarily needed since \"$$DIRNAME/$$BASENAMESO.$(STATICLIBEXT)\" already exists - press return to skip" ; \
				fi ; \
				echo "> Enter soft-link target file or directory for \"$@\" (return if not needed): " ; \
				echo -n "> " ; \
				cd $$DIRNAME ; \
				eval $(READ) TARGET ; \
				cd $(SPXDIR) ; \
				if test "$$TARGET" != "" ; \
				then \
					echo "-> creating softlink \"$@\" -> \"$$TARGET\"" ; \
					rm -f $@ ; \
					$(LN_s) $$TARGET $@ ; \
				else \
					echo "* skipped creation of softlink \"$@\". Call \"make links\" if needed later." ; \
				fi ; \
				echo ; \
			fi'
endif

.PHONY: checkdefines
checkdefines:
ifneq ($(GMP),true)
ifneq ($(GMP),false)
		$(error invalid GMP flag selected: GMP=$(GMP). Possible options are: true false)
endif
endif
ifneq ($(ZLIB),true)
ifneq ($(ZLIB),false)
		$(error invalid ZLIB flag selected: ZLIB=$(ZLIB). Possible options are: true false)
endif
endif

.PHONY: errorhints
errorhints:
ifeq ($(ZLIB),true)
		@echo "build failed with ZLIB=true: if ZLIB is not available, try building with ZLIB=false"
endif
ifeq ($(GMP),true)
		@echo "build failed with GMP=true: if GMP is not available, try building with GMP=false"
endif

# --- EOF ---------------------------------------------------------------------
# DO NOT DELETE