dnl Process this file with autoconf to produce a configure script.
AC_INIT(iemmatrix.c)

dnl Checks for programs.
AC_PROG_CC

AC_SUBST(STK)
AC_SUBST(DFLAGS)
AC_SUBST(LFLAGS)
AC_SUBST(EXT)
AC_SUBST(LD)
AC_SUBST(STRIP)
AC_SUBST(STRIPFLAGS)
AC_SUBST(IEMMATRIX_VERSION)
AC_SUBST(REFERENCEPATH)
AC_SUBST(PDLIBDIR)
AC_SUBST(INCLUDES)
AC_SUBST(SOURCES)


AC_ARG_WITH(pdversion, [  --with-pdversion=<ver>  enforce a certain pd-version (e.g. 0.37)])
AC_ARG_WITH(version,   [  --with-version=<ver>    enforce a certain iemmatrix-version (e.g. 0.1)])
AC_ARG_WITH(extension, [  --with-extension=<ext>  enforce a certain extension for the dynamic library (e.g. dll)])


dnl Checks for libraries.
dnl Replace `main' with a function in -lc:
AC_CHECK_LIB(c, main)
AC_CHECK_LIB(crtdll, fclose)

dnl Replace `main' with a function in -lm:
AC_CHECK_LIB(m, main)
dnl Replace `main' with a function in -lpthread:
dnl AC_CHECK_LIB(pthread, main)
dnl Replace `main' with a function in -lstk:
dnl AC_CHECK_LIB(stk, main, STK=yes)


if test $includedir
then
 for id in $includedir
 do
   if test -d $id; then INCLUDES="-I$id $INCLUDES"; fi
 done
fi
if test $libdir
then
 for id in $libdir
 do
   if test -d $id; then LIBS="-L$id $LIBS"; fi
 done
fi

AC_CHECK_LIB(pd, nullfn)

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(stdlib.h stdio.h string.h math.h time.h sys/time.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_HEADER_TIME

dnl Checks for library functions.
AC_FUNC_MMAP
AC_CHECK_FUNCS(select socket strerror)


### make-depend flags
if test "x$ac_cv_c_compiler_gnu" = "xyes"; then
 AC_SUBST(MAKEDEP_FLAGS, "-MM")
else
 AC_SUBST(MAKEDEP_FLAGS, "-M")
fi

dnl check for "-mms-bitfields" cflag
dnl why is there no generic compiler-check for a given flag ?
dnl it would make things so easy: AC_CHECK_FLAG([-mms-bitfields],,)
AC_MSG_CHECKING("ms-bitfields")
cat > conftest.c << EOF
int main(){
  return 0;
}
EOF
if ${CC} ${INCLUDES} ${DFLAGS} -o conftest.o conftest.c ${CFLAGS} -mms-bitfields > /dev/null 2>&1
then
  echo "yes"
  CFLAGS="${CFLAGS} -mms-bitfields"
else
  echo "no"
fi




dnl isn't there a better way to check for good linker/stripper ?

dnl if we don't have $LD set, we set it to $(CC)
dnl LD=${LD:=$CC}
if test "x$LD" = "x"
then
 if test "x$host" != "x"
 then
  LD=${host}-ld
  if $(which ${LD} > /dev/null)
  then
    :
  else
    LD=""
  fi
 fi
fi
LD=${LD:=$CC}

dnl if we don't have $STRIP set, we set it to ${host}-strip or strip
if test "x$STRIP" = "x"
then
 if test "x$host" != "x"
 then
  STRIP=${host}-strip
 else
# we need a method to check arguments for arbitrary commands like strip
  STRIP="strip"
 fi
fi
if $(which ${STRIP} > /dev/null)
then
  STRIPFLAGS="--strip-uneeded"
else
  STRIP="echo fake strip"
fi

DFLAGS=""

dnl
dnl  OK, checks for machines are here now
dnl
if test `uname -s` = Linux; 
then
  LFLAGS="-export_dynamic  -shared"
  CFLAGS="-fPIC $CFLAGS"
  EXT=pd_linux	
  STRIPFLAGS="--strip-unneeded"
fi

dnl This should use '-bundle_loader /path/to/pd/bin/pd' instead of'-undefined suppress'
dnl then strip might do something
if test `uname -s` = Darwin; 
then
  LD=cc
  LFLAGS="-bundle -undefined suppress -flat_namespace"
  EXT=pd_darwin
  STRIPFLAGS=
fi

if test `uname | sed -e 's/^MINGW.*/NT/'` = NT; 
then
  LD=gcc
  INCLUDES="-I@prefix@/src"
  DFLAGS="-D__WIN32__"
  LFLAGS="-shared @prefix@/bin/pd.dll"
  EXT=dll
else
  PDLIBDIR="/lib/pd"
fi

if test `uname -s` = IRIX64; 
then
  LFLAGS="-n32 -DUNIX -DIRIX -DN32 -woff 1080,1064,1185 \
	-OPT:roundoff=3 -OPT:IEEE_arithmetic=3 -OPT:cray_ivdep=true \
        -shared -rdata_shared"
  EXT=pd_irix6
  dnl DFLAGS="-DUNIX -DIRIX6"
  STRIPFLAGS="--strip-unneeded"
fi

if test `uname -s` = IRIX32; 
then
  LFLAGS="-o32 -DUNIX -DIRIX -O2 
         -shared -rdata_shared"
  EXT=pd_irix5
  dnl DFLAGS="-DUNIX -DIRIX5"
  STRIPFLAGS="--strip-unneeded"
fi


if test "x$with_extension" != "x"
then
 EXT=$with_extension
fi


dnl Checks for pd-version, to set the correct help-path
AC_MSG_CHECKING("pd\>=0.37")

if test "$with_pdversion" != ""
then
echo -n "($with_pdversion)... "
  PD_VERSION="$with_pdversion"
else
if test "x$cross_compiling" = "xno"
then

cat > conftest.c << EOF
#include <stdio.h>
#include "m_pd.h"
int main(){
  printf("%d.%d\n", PD_MAJOR_VERSION, PD_MINOR_VERSION);
  return 0;
}
EOF

 if $CC $INCLUDES -o conftest.o conftest.c > /dev/null 2>&1
 then
  PD_VERSION=`./conftest.o`
 else
  PD_VERSION=""
 fi
  echo -n $PD_VERSION
else
dnl we are cross-compiling...
 echo -n "(X)..."
 PD_VERSION="0.38"
fi
fi

let PD_MAJORVERSION=`echo $PD_VERSION | cut -d"." -f1`+0
let PD_MINORVERSION=`echo $PD_VERSION | cut -d"." -f2`+0



if test "$PD_MAJORVERSION" -gt 0 || test "$PD_MINORVERSION" -ge 37
then
  REFERENCEPATH=extra/help-
  echo " yes"
else
  REFERENCEPATH=doc/5.reference/
  echo " no"
fi


dnl check for iemmatrix-version (but why...)
AC_MSG_CHECKING("iemmatrix-version")

if test "$with_version" != ""
then
  echo -n "($with_version)... "
  IEMMATRIX_VERSION="$with_version"
else

if test "x$cross_compiling" = "xno"
then
cat > conftest.c << EOF
#include <stdio.h>
#include "iemmatrix.h"
int main(){
  printf("%s\n", VERSION);
  return 0;
}
EOF

if $CC $INCLUDES -o conftest.o conftest.c > /dev/null 2>&1
then
  IEMMATRIX_VERSION=`./conftest.o`
  echo "$IEMMATRIX_VERSION"
else
  IEMMATRIX_VERSION=""
  echo "(unknown)"
fi
else
  IEMMATRIX_VERSION="X"
  echo "(X)"
fi
fi

echo "SOURCES = \\"> Make.source
for i in `ls mtx_*.c iemmatrix.c`
do
  echo "	$i\\">> Make.source
done
echo >> Make.source

AC_OUTPUT(Makefile)

rm -f conftest.*