GAP libsing in Sage with patches

How to install libsing in GAP in Sage

• Install gap-4.5.5 in Sage, if needed (see Sage trac #13211). That just amounts to

  sage -i http://www.stp.dias.ie/~vbraun/Sage/spkg/gap-4.5.5.spkg
  sage -i http://www.stp.dias.ie/~vbraun/Sage/spkg/gap_packages-4.5.5.spkg
  sage -i http://www.stp.dias.ie/~vbraun/Sage/spkg/database_gap-4.5.5.spkg
  

• Install a modified version of the Singular-3-1-5 spkg from Sage trac #13237. Here, you have to apply two patches to the Sage library. Then download the spkg, and open it:

  tar -xjf singular-3-1-5.p0.spkg
  

  Then, create a new file singular-3-1-5.p0/patches/install_table.patch with the following content:

  --- src/Singular/Makefile.in    2012-07-11 11:00:13.000000000 +0100
  +++ src/Singular/Makefile.in    2012-08-27 16:22:26.013159361 +0100
  @@ -599,7 +599,7 @@
            ${INSTALL_PROGRAM}  $$file ${libdir}; \
          done
          ${INSTALL_PROGRAM} libsingular.h ${includedir}
  -       for file in subexpr.h tok.h grammar.h ipid.h lists.h ipshell.h attrib.h; do \
  +       for file in subexpr.h tok.h grammar.h ipid.h lists.h ipshell.h attrib.h table.h; do \
          sed -e "s:<kernel/:<singular/:" < $$file |sed -e "s:<Singular/:<singular/:"|sed -e "s:<omalloc/:<:"|sed -e "s:<factory/:<:" >${includedir}/singular/$$file ;\
          done
  

  Pack the package again:

  tar -cjf singular-3-1-5.p1.spkg singular-3-1-5.p0
  

  Install it and rebuild Sage:

  sage -i singular-3-1-5.p1.spkg
  sage -b
  

• Open a Sage shell (sage -sh)

• Issue the commands

  cd $SAGE_LOCAL/gap-newest/pkg
  hg clone ssh://hg@hg.gap-system.org/libsingular
  cd libsingular
  

• Issue the commands

  export LDFLAGS="-L$SAGE_LOCAL/lib -ldl -lpthread"
  export CFLAGS="-I$SAGE_LOCAL/include"
  export CPPFLAGS="-I$SAGE_LOCAL/include"
  

• Edit $SAGE_LOCAL/gap-newest/src/gmpints.h, comment out the lines 54-58:

  #ifndef __GNU_MP_RELEASE
   #if __GMP_MP_RELEASE < 50002
   #error Aborting compile: GAP requires GMP 5.0.2 or newer
   #endif
  #endif
  

• Modify the sources according to the following diff:

  diff --git a/SINGULARVERSION b/SINGULARVERSION
  deleted file mode 100644
  --- a/SINGULARVERSION
  +++ /dev/null
  @@ -1,1 +0,0 @@
  -3-1-5
  diff --git a/src/Makefile.am b/src/Makefile.am
  --- a/src/Makefile.am
  +++ b/src/Makefile.am
  @@ -1,19 +1,17 @@
   BINARCHDIR = bin/$(GAPARCH)
   GAPINSTALLLIB = $(abs_top_srcdir)/$(BINARCHDIR)/libsing.so
  -SINGULARNAME = Singular-`cat ../SINGULARVERSION`
  -SINGARCHNAME = `cat ../SINGARCHNAME`
  
   lib_LTLIBRARIES = libsing.la
   bin_PROGRAMS = gentableforGAP
  
   gentableforGAP_SOURCES = gentableforGAP.cc
  -gentableforGAP_CPPFLAGS = -I../${SINGULARNAME} -I../${SINGULARNAME}/Singular
  -gentableforGAP_LDFLAGS = -R${abs_top_srcdir}/${SINGULARNAME}/Singular -L${abs_top_srcdir}/${SINGULARNAME}/Singular -R${abs_top_srcdir}/${SINGULARNAME}/${SINGARCHNAME}/lib -lsingular -lpthread
  +gentableforGAP_CPPFLAGS =
  +gentableforGAP_LDFLAGS = -lsingular -lpthread
  
   libsing_la_SOURCES = libsing.c libsing.h cxxfuncs.cc
  -libsing_la_LDFLAGS = -module -avoid-version -R${abs_top_srcdir}/${SINGULARNAME}/Singular -L${abs_top_srcdir}/${SINGULARNAME}/Singular -R${abs_top_srcdir}/${SINGULARNAME}/${SINGARCHNAME}/lib -lsingular -lpthread
  +libsing_la_LDFLAGS = -module -avoid-version -lsingular -lpthread
   libsing_la_LIBADD =
  -libsing_la_CPPFLAGS = $(GAP_CPPFLAGS) -I../${SINGULARNAME}/${SINGARCHNAME}/include
  +libsing_la_CPPFLAGS = $(GAP_CPPFLAGS)
  
   # Change it so that make all also does a make install (to build the .so)
   # and then copies it to the correct bin directory
  diff --git a/src/Makefile.in b/src/Makefile.in
  --- a/src/Makefile.in
  +++ b/src/Makefile.in
  @@ -251,16 +251,14 @@
   top_srcdir = @top_srcdir@
   BINARCHDIR = bin/$(GAPARCH)
   GAPINSTALLLIB = $(abs_top_srcdir)/$(BINARCHDIR)/libsing.so
  -SINGULARNAME = Singular-`cat ../SINGULARVERSION`
  -SINGARCHNAME = `cat ../SINGARCHNAME`
   lib_LTLIBRARIES = libsing.la
   gentableforGAP_SOURCES = gentableforGAP.cc
  -gentableforGAP_CPPFLAGS = -I../${SINGULARNAME} -I../${SINGULARNAME}/Singular
  -gentableforGAP_LDFLAGS = -R${abs_top_srcdir}/${SINGULARNAME}/Singular -L${abs_top_srcdir}/${SINGULARNAME}/Singular -R${abs_top_srcdir}/${SINGULARNAME}/${SINGARCHNAME}/lib -lsingular -lpthread
  +gentableforGAP_CPPFLAGS =
  +gentableforGAP_LDFLAGS = -lsingular -lpthread
   libsing_la_SOURCES = libsing.c libsing.h cxxfuncs.cc
  -libsing_la_LDFLAGS = -module -avoid-version -R${abs_top_srcdir}/${SINGULARNAME}/Singular -L${abs_top_srcdir}/${SINGULARNAME}/Singular -R${abs_top_srcdir}/${SINGULARNAME}/${SINGARCHNAME}/lib -lsingular -lpthread
  +libsing_la_LDFLAGS = -module -avoid-version -lsingular -lpthread
   libsing_la_LIBADD =
  -libsing_la_CPPFLAGS = $(GAP_CPPFLAGS) -I../${SINGULARNAME}/${SINGARCHNAME}/include
  +libsing_la_CPPFLAGS = $(GAP_CPPFLAGS)
   all: pkgconfig.h
          $(MAKE) $(AM_MAKEFLAGS) all-am
  
  diff --git a/src/gentableforGAP.cc b/src/gentableforGAP.cc
  --- a/src/gentableforGAP.cc
  +++ b/src/gentableforGAP.cc
  @@ -14,9 +14,9 @@
   #include <time.h>
   #include <unistd.h>
  
  -#include <Singular/mod2.h>
  -#include <Singular/tok.h>
  -#include <Singular/grammar.h>
  +#include <singular/mod2.h>
  +#include <singular/tok.h>
  +#include <singular/grammar.h>
  
   // to produce convert_table.texi for doc:
   //#define CONVERT_TABLE 1
  @@ -112,7 +112,7 @@
   #define IPCONV
   #define IPASSIGN
  
  -#include "table.h"
  +#include "singular/table.h"
  
   const char * Tok2Cmdname(int tok)
   {
  

• Issue the commands

  autoreconf -v
  ./configure --with-gaproot=$SAGE_LOCAL/gap-newest
  make
  

• Run some example, such as the one in $SAGE_LOCAL/gap-newest/pkg/libsingular/example.