# configure.in for SExtractor
# (C) E.Bertin 2002-2008
# Process this file with autoconf to produce a configure script.
# First, disable the annoying config.cache
define([AC_CACHE_LOAD],)
define([AC_CACHE_SAVE],)

# This is your standard Bertin source code...
AC_INIT(sextractor, 2.8.2, [bertin@iap.fr])
AC_CONFIG_SRCDIR(src/makeit.c)
AC_CONFIG_AUX_DIR(autoconf)
AM_CONFIG_HEADER(config.h)
AM_INIT_AUTOMAKE
date=`date +%Y-%m-%d`
date2=`date +"%a %b %d %Y"`
date3=`date +"%B %Y"`
AC_DEFINE_UNQUOTED(DATE, "$date", [Archive creation date])
AC_SUBST(PACKAGER, "Emmanuel Bertin")
AC_SUBST(DATE2, "$date2")
AC_SUBST(DATE3, "$date3")

# Include macros
sinclude(acx_atlas.m4)
sinclude(acx_fftw.m4)
sinclude(acx_prog_cc_optim.m4)
sinclude(acx_pthread.m4)
sinclude(acx_urbi_resolve_dir.m4)

# Display pakage and version number
AC_MSG_RESULT([*********** Configuring:  $PACKAGE $VERSION ($date) **********])

# Initialize the list of compilers to consider
cclist="cc gcc"

# Backup and reset the input CFLAGS and LDFLAGS
mycflags="$CFLAGS"
CFLAGS=""
myldflags="$LDFLAGS"
LDFLAGS=""

# Provide special option for the Linux Intel C compiler
AC_MSG_CHECKING([for Linux Intel C compiler mode])
AC_ARG_ENABLE(icc,
	[AC_HELP_STRING([--enable-icc],
	[Enable special mode for compilation with the Intel compiler \
(off by default)])],
        use_icc="yes"
        cclist="icc $cclist"
	AC_MSG_RESULT([yes]),
        use_icc="no"
	AC_MSG_RESULT([no]))

# Checks for programs.
# GCC is chosen last because it is likely to yield less optimized code
AC_LANG(C)
AC_PROG_CC([$cclist])
# C Compiler: Check that it is ANSI C and POSIX-compliant
AM_PROG_CC_STDC
AC_ISC_POSIX
ACX_PROG_CC_OPTIM
AC_DISABLE_STATIC
#AC_DISABLE_SHARED
AC_PROG_LIBTOOL
AC_PROG_INSTALL

# Checks for libraries.
AC_CHECK_LIB(m, sin)

# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS([fcntl.h limits.h malloc.h stdlib.h string.h sys/mman.h \
		sys/types.h unistd.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_OFF_T
AC_TYPE_SIZE_T
AC_STRUCT_TM
AC_TYPE_UID_T

# Checks for library functions.
AC_FUNC_ERROR_AT_LINE
#AC_FUNC_MALLOC
AC_FUNC_MMAP
AC_TYPE_SIGNAL
AC_FUNC_STAT
AC_FUNC_STRFTIME
AC_CHECK_FUNCS([atexit getenv memcpy memmove memset mkdir munmap strstr \
		sincos logf])

# Check support for large files
AC_SYS_LARGEFILE
AC_FUNC_FSEEKO

# Set the data directory to a true absolute path
datadir2=$(URBI_RESOLVE_DIR([$datadir]))

# Provide special options for ATLAS
AC_ARG_WITH(atlas,
        [AC_HELP_STRING([--with-atlas=<ATLAS library path>],
        [Provide an alternative path to the ATLAS library])],
    atlas_libdir=$withval,
    atlas_libdir=""
    )
AC_ARG_WITH(atlas-incdir,
        [AC_HELP_STRING([--with-atlas-incdir=<ATLAS include dir>],
        [Provide an alternative path to the ATLAS include directory])],
    atlas_incdir=$withval,
    atlas_incdir=""
    )

# Provide special options for FFTW
AC_ARG_WITH(fftw,
        [AC_HELP_STRING([--with-fftw=<FFTW library path>],
        [Provide an alternative path to the FFTW library])],
    fftw_libdir=$withval,
    fftw_libdir=""
    )
AC_ARG_WITH(fftw-incdir,
        [AC_HELP_STRING([--with-fftw-incdir=<FFTW include dir>],
        [Provide an alternative path to the FFTW include directory])],
    fftw_incdir=$withval,
    fftw_incdir=""
    )

# Provide a special option for the default XSLT URL
AC_ARG_WITH(xsl_url,
	[AC_HELP_STRING([--with-xsl_url=<default URL for XSLT filter>],
	[Provide an alternative default URL of the XSLT filter])],
	[xsl_url=$withval],
	[xsl_url="file://$datadir2/$PACKAGE_NAME/$PACKAGE_NAME.xsl"]
	)

AC_DEFINE_UNQUOTED([XSL_URL], "$xsl_url",[Default URL of the XSLT filter])

# Set flags for multithreading
n_pthreads=16
AC_ARG_ENABLE(threads,
        [AC_HELP_STRING([--enable-threads@<:@=<max_number_of_threads>@:>@],
	[Enable multhreading (on with up to $n_pthreads threads by default)])],
    if test "$enableval" = "no"; then
      use_pthreads="no"
    else
      use_pthreads="yes"
      if test "$enableval" != "yes"; then
        n_pthreads=$enableval
      fi
    fi,
    use_pthreads=yes
    )

# Provide special option for gprof profiling
AC_MSG_CHECKING([for gprof profiler mode])
AC_ARG_ENABLE(gprof,
	[AC_HELP_STRING([--enable-gprof],
	[Enable special mode for compilation with the gprof profiler \
(off by default)])],
        use_gprof="yes"
	AC_MSG_RESULT([yes]),
        use_gprof="no"
	AC_MSG_RESULT([no]))

# Enable static linking
AC_MSG_CHECKING([static linking])
AC_ARG_ENABLE(static,
	[AC_HELP_STRING([--enable-static],
	[Enable static linking \
(off by default)])],
        use_static="yes"
	AC_MSG_RESULT([yes]),
        use_static="no"
	AC_MSG_RESULT([no]))

################# Actions to complete in case of multhreading ################
AC_DEFINE_UNQUOTED(THREADS_NMAX, $n_pthreads,[Maximum number of POSIX threads])
if test "$use_pthreads" = "yes"; then
  AC_MSG_CHECKING([for multithreading])
  AC_MSG_RESULT([maximum of $n_pthreads thread(s)])
  AC_DEFINE(USE_THREADS, 1, [Triggers multhreading])
# CC, CFLAGS and LIBS are system and compiler-dependent
  ACX_PTHREAD
  CC="$PTHREAD_CC"
  [CFLAGS="$CFLAGS $PTHREAD_CFLAGS -D_REENTRANT"]
  LIBS="$PTHREAD_LIBS $LIBS"
fi
AM_CONDITIONAL(USE_THREADS, test $use_pthreads = "yes")

################ handle the FFTW library (Fourier transforms) ################
ACX_FFTW($fftw_libdir,$fftw_incdir,$use_pthreads,no,
	[use_fftw=yes],[use_fftw=no])
if test "$use_fftw" = "yes"; then
  LIBS="$FFTW_LIBS $LIBS"
else
  AC_MSG_ERROR([$FFTW_ERROR Exiting.])
fi

################## handle the ATLAS library(linear algebra) ##################
ACX_ATLAS($atlas_libdir,$atlas_incdir,$use_pthreads,
	[use_atlas=yes],[use_atlas=no])
if test "$use_atlas" = "yes"; then
  LIBS="$ATLAS_LIB $LIBS"
else
  AC_MSG_ERROR([$ATLAS_ERROR Exiting.])
fi

# Link with gprof option
if test "$use_gprof" = "yes"; then
  if test "$use_icc" = "yes"; then
    CFLAGS="$CFLAGS -pq"
  else
    CFLAGS="$CFLAGS -pg"
  fi
  use_static="no"
fi

# Static linking option
if test "$use_static" = "yes"; then
  LDFLAGS="-static -shared-libgcc $LDFLAGS"
fi

# Override automatic CFLAGS and LDFLAGS with those of user
#if test -n "$mycflags"; then
#CFLAGS="$mycflags"
#fi
#if test -n "$myldflags"; then
#LDFLAGS="$myldflags"
#fi

# Display compiler and linker flags
AC_MSG_RESULT([***************************************************************])
AC_MSG_RESULT([Compile cmdline:  $CC $CFLAGS])
AC_MSG_RESULT([Link    cmdline:  $CC $LDFLAGS $LIBS])
AC_MSG_RESULT([Default XSLT URL: $xsl_url])
AC_MSG_RESULT([***************************************************************])

AC_CONFIG_FILES([
Makefile
src/Makefile
src/fits/Makefile
src/levmar/Makefile
src/wcs/Makefile
man/Makefile
tests/Makefile
sextractor.spec
man/sex.1])
AC_OUTPUT