#
#				configure.ac
#
# Process this file with autoconf to generate a configure script.
#
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
#
#	This file part of:	SCAMP
#
#	Copyright:		(C) 2002-2020 IAP/CNRS/SorbonneU
#
#	License:		GNU General Public License
#
#	SCAMP is free software: you can redistribute it and/or modify
#	it under the terms of the GNU General Public License as published by
#	the Free Software Foundation, either version 3 of the License, or
# 	(at your option) any later version.
#	SCAMP is distributed in the hope that it will be useful,
#	but WITHOUT ANY WARRANTY; without even the implied warranty of
#	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#	GNU General Public License for more details.
#	You should have received a copy of the GNU General Public License
#	along with SCAMP.  If not, see <http://www.gnu.org/licenses/>.
#
#	Last modified:		01/12/2020
#
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

# First, disable the annoying config.cache
define([AC_CACHE_LOAD],)
define([AC_CACHE_SAVE],)

# This is your standard AstrOmatic source code...
AC_INIT(SCAMP, 2.10.0, [astromatic@astromatic.net],
	scamp, [http://astromatic.net/software/scamp])
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_AUX_DIR(autoconf)
AC_CONFIG_SRCDIR(src/makeit.c)
AC_CONFIG_HEADERS(config.h)
AM_INIT_AUTOMAKE
d0=`fgrep "Last modified" configure.ac | cut -d: -f2- | head -1 | sed "s+\(..\)/\(..\)/\(....\)+\\3-\\2-\\1+"`
date=`date +%Y-%m-%d -d $d0`
date1=`date -R -d $d0`
date2=`date +"%a %b %d %Y" -d $d0`
date3=`date +"%B %Y" -d $d0`
AC_DEFINE_UNQUOTED(DATE, "$date", [Archive creation date])
AC_SUBST(PACKAGER, "AstrOmatic")
AC_SUBST(DATE1, "$date1")
AC_SUBST(DATE2, "$date2")
AC_SUBST(DATE3, "$date3")

# Include macros
sinclude(acx_atlas.m4)
sinclude(acx_openblas.m4)
sinclude(acx_curl.m4)
sinclude(acx_fftw.m4)
sinclude(acx_mkl.m4)
sinclude(acx_plplot.m4)
sinclude(acx_prog_cc_optim.m4)
sinclude(acx_pthread.m4)
sinclude(acx_urbi_resolve_dir.m4)

# Provide a special option for setting the package release number
AC_ARG_WITH(release,
	[AS_HELP_STRING([--with-release=<release number>],
	[set the package release number (default = 1)])],
	[],
	[with_release="no"])
if test "$with_release" = "no"; then
  with_release=1
fi
AC_SUBST(PACKAGE_RELEASE, "$with_release")

# Display pakage and version number
AC_MSG_RESULT([******** Configuring:  $PACKAGE_NAME $PACKAGE_VERSION - $PACKAGE_RELEASE ($date) ********])

# Provide special option for choosing automatically the compilation flags.
AC_MSG_CHECKING([if compilation flags are set automatically])
AC_ARG_ENABLE(auto-flags,
	[AS_HELP_STRING([--enable-auto-flags],
	[Let the configure script choose the compilation flags (default = no)])],
	AC_MSG_RESULT([yes]),
	AC_MSG_RESULT([no]))

# Provide special option for the Linux Intel C compiler
AC_MSG_CHECKING([whether the INTEL compiler is enabled])
AC_ARG_ENABLE(icc,
	[AS_HELP_STRING([--enable-icc],
	[Use the Intel compiler (default = no)])],
        CC="icc"
	AC_MSG_RESULT([yes]),
	AC_MSG_RESULT([no]))

# Provide special options for INTEL MKL
# We force the use of icc
AC_MSG_CHECKING([whether INTEL's MKL is enabled])
AC_ARG_ENABLE(mkl,
	[AS_HELP_STRING([--enable-mkl],
	[Use INTEL's MKL for solvers and FFTs (default = no)])],
        enable_icc="yes"
        CC="icc"
	AC_MSG_RESULT([yes]),
	AC_MSG_RESULT([no]))

# Checks for programs.
AC_LANG(C)

AC_SEARCH_LIBS([strerror],[cposix])
if test "$enable_auto_flags" = "yes"; then
  CFLAGS=""
  LDFLAGS=""
  ACX_PROG_CC_OPTIM
fi
LT_INIT
AC_PROG_INSTALL

# Checks for libraries.
AC_CHECK_LIB(m, sin)

# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS([dlfcn.h fcntl.h limits.h malloc.h stdlib.h string.h \
		sys/mman.h sys/types.h unistd.h])
if test "$enable_icc" = "yes"; then
  AC_CHECK_HEADERS(mathimf.h)
fi

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

# Checks for library functions.
AC_FUNC_ERROR_AT_LINE
AC_FUNC_MMAP
AC_FUNC_STAT
AC_FUNC_STRFTIME
AC_CHECK_FUNCS([atexit getenv mallopt memcpy memmove memset mkdir munmap \
	setlinebuf strstr sysconf])
AC_CHECK_FUNC([isnan], AC_DEFINE_UNQUOTED([HAVE_ISNAN2], 1,
		[Second isnan check]))

# Check support for large files
AC_SYS_LARGEFILE
AC_FUNC_FSEEKO

# Provide special options for ATLAS
AC_ARG_WITH(atlas-libdir,
	[AS_HELP_STRING([--with-atlas-libdir=<ATLAS library path>],
	[Provide an alternative path to the ATLAS library])])
AC_ARG_WITH(atlas-incdir,
	[AS_HELP_STRING([--with-atlas-incdir=<ATLAS include dir>],
	[Provide an alternative path to the ATLAS include directory])])

# Provide special options for cURL
AC_ARG_WITH(curl-libdir,
        [AS_HELP_STRING([--with-curl-libdir=<cURL library path>],
	[Alternative directory for the cURL library])])
AC_ARG_WITH(curl-incdir,
        [AS_HELP_STRING([--with-curl-incdir=<cURL include dir>],
	[Alternative directory for cURL include files])])

# Provide special options for FFTW
AC_ARG_WITH(fftw-libdir,
	[AS_HELP_STRING([--with-fftw-libdir=<FFTW library path>],
	[Provide an alternative path to the FFTW library])])
AC_ARG_WITH(fftw-incdir,
	[AS_HELP_STRING([--with-fftw-incdir=<FFTW include dir>],
	[Provide an alternative path to the FFTW include directory])])

# Provide special options for the MKL library
AC_ARG_WITH(mkl-dir,
	[AS_HELP_STRING([--with-mkl-dir=<MKL path>],
	[Provide an alternative path to the MKL library])])

# Provide special options for OpenBLAS
AC_MSG_CHECKING([whether OpenBLAS is enabled])
AC_ARG_ENABLE(openblas,
	[AS_HELP_STRING([--enable-openblas],
	[Use the OpenBLAS library instead of ATLAS (default = no)])],
	AC_MSG_RESULT([yes]),
	AC_MSG_RESULT([no]))
AC_ARG_WITH(openblas-libdir,
	[AS_HELP_STRING([--with-openblas-libdir=<OpenBLAS library path>],
	[Provide an alternative path to the OpenBLAS library])])
AC_ARG_WITH(openblas-incdir,
	[AS_HELP_STRING([--with-openblas-incdir=<OpenBLAS header dir>],
	[Provide an alternative path to the OpenBLAS header directory])])

# Provide special options for PLPlot
AC_MSG_CHECKING([whether PLPlot is enabled])
AC_ARG_ENABLE(plplot,
	[AS_HELP_STRING([--enable-plplot],
	[Use the PLPlot library (default = yes)])],
	AC_MSG_RESULT([yes]),
	AC_MSG_RESULT([no]))
AC_ARG_WITH(plplot-libdir,
	[AS_HELP_STRING([--with-plplot-libdir=<PLPlot library path>],
	[Provide an alternative path to the PLPlot library])])
AC_ARG_WITH(plplot-incdir,
	[AS_HELP_STRING([--with-plplot-incdir=<PLPlot include dir>],
	[Provide an alternative path to the PLPlot include directory])])


# Provide a special option for the default XSLT URL
with_xsl_url="file://"$(URBI_RESOLVE_DIR([$datadir]))"/$PACKAGE_TARNAME/$PACKAGE_TARNAME.xsl"
AC_ARG_WITH(xsl_url,
	[AS_HELP_STRING([--with-xsl_url=<default URL for XSLT filter>],
	[Provide an alternative default URL of the XSLT filter])])

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

# Set flags for multithreading
n_pthreads=1024
AC_ARG_ENABLE(threads,
	[AS_HELP_STRING([--enable-threads@<:@=<max_number_of_threads>@:>@],
	[Enable multhreading (on with up to 1024 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 profiling
AC_MSG_CHECKING([for profiler mode])
AC_ARG_ENABLE(profiling,
	[AS_HELP_STRING([--enable-profiling],
	[Enable special mode for profiling (default = no)])]
	AC_MSG_RESULT([yes]),
	AC_MSG_RESULT([no]))

# Enable linking options for making the executable as portable as possible.
AC_MSG_CHECKING([best linking option])
AC_ARG_ENABLE(best-link,
	[AS_HELP_STRING([--enable-best-link],
	[Choose the right combination of static and dynamic linking to make \
the executable as portable as possible (default = no)])],
	AC_MSG_RESULT([yes]),
	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"
  [AM_CFLAGS="$AM_CFLAGS $PTHREAD_CFLAGS -D_REENTRANT"]
  LIBS="$LIBS $PTHREAD_LIBS"
fi
AM_CONDITIONAL(USE_THREADS, test $use_pthreads = "yes")

############ handle the INTEL MKL library (FFTW + LAPACKe) ###########
if test "$enable_mkl" = "yes"; then
  convlibs="${srcdir}/../src/wcs/libwcs_c.a"
  ACX_MKL($with_mkl_dir,yes,$enable_best_link,$convlibs)
  AC_MSG_CHECKING([for the INTEL MKL])
  if test "$MKL_WARN" == ""; then
    AC_MSG_RESULT([yes])
  else
    AC_MSG_RESULT([no])
    AC_MSG_WARN([$MKL_WARN])
  fi
  AM_CFLAGS="$AM_CFLAGS $MKL_CFLAGS "
  AM_LDFLAGS="$AM_LDFLAGS $MKL_LDFLAGS "
  LIBS="$LIBS $MKL_LIBS"
else
################ handle the FFTW library (Fourier transforms) ################
  ACX_FFTW($with_fftw_libdir, $with_fftw_incdir, $use_pthreads,yes,
    [
      [LIBS="$FFTW_LIBS $LIBS"]
      if test "$FFTW_WARN" != ""; then
        AC_MSG_WARN([$FFTW_WARN])
      fi
    ],
    AC_MSG_ERROR([$FFTW_ERROR Exiting.])
  )

  if test "x$enable_openblas" = "xyes"; then
######## Handle the OpenBLAS library (linear algebra: BLAS + LAPACKe) ########
    ACX_OPENBLAS($with_openblas_libdir, $with_openblas_incdir, $use_pthreads, no,
      [
        AM_CFLAGS="$AM_CFLAGS $OPENBLAS_CFLAGS "
        AM_LDFLAGS="$AM_LDFLAGS $OPENBLAS_LDFLAGS "
        LIBS="$OPENBLAS_LIBS $LIBS"
        if test "$OPENBLAS_WARN" != ""; then
          AC_MSG_WARN([$OPENBLAS_WARN])
        fi
      ],
      AC_MSG_ERROR([$OPENBLAS_ERROR Exiting.])
    )

  else
######### handle the ATLAS library (linear algebra: BLAS + cLAPACK) ##########
    ACX_ATLAS($with_atlas_libdir, $with_atlas_incdir, $use_pthreads,
      [
        [LIBS="$ATLAS_LIBS $LIBS"]
        if test "$ATLAS_WARN" != ""; then
	  AC_MSG_WARN([$ATLAS_WARN])
	fi
      ],
      AC_MSG_ERROR([$ATLAS_ERROR Exiting.])
    )
  fi
fi

################# handle the cURL library (HTTP queries) ##################
ACX_CURL($with_curl_libdir,$with_curl_incdir,
	[AM_CPPFLAGS="$AM_CPPFLAGS $CURL_CFLAGS"]
	[LIBS="$CURL_LIBS $LIBS"]
	if test "$CURL_WARN" != ""; then
	  AC_MSG_WARN([$CURL_WARN])
	fi,
	AC_MSG_ERROR([$CURL_ERROR Exiting.]))

################# handle the PLPlot library (graphic plots) ##################
if test "$enable_plplot" != "no"; then
  ACX_PLPLOT($with_plplot_libdir,$with_plplot_incdir,
    [use_plplot="yes"]
    [AM_CPPFLAGS="$AM_CPPFLAGS $PLPLOT_CFLAGS"]
    [LIBS="$LIBS $PLPLOT_LIBS"],
    [use_plplot="no"]
    AC_MSG_WARN([PLPlot library not found/incomplete! Plotting deactivated.]))
else
  AC_MSG_WARN([Plotting deactivated by user.])
fi
AM_CONDITIONAL(USE_PLPLOT, test "$use_plplot" = "yes")

# Compile with profiling option
if test "$enable_profiling" = "yes"; then
  if test "$enable_icc" = "yes"; then
    AM_CFLAGS="$AM_CFLAGS -pq"
  else
    AM_CFLAGS="$AM_CFLAGS -pg"
  fi
  enable_best_link="no"
fi

# "Best" linking option
if test "$enable_best_link" = "yes"; then
  if test "$enable_icc" = "yes"; then
    AM_LDFLAGS="-static-intel -qopenmp-link static -shared-libgcc \
	-static-libtool-libs -no-intel-extensions -avoid-version $AM_LDFLAGS"
  else
    AM_LDFLAGS="-shared-libgcc -static-libtool-libs -avoid-version $AM_LDFLAGS"
  fi
fi

AC_SUBST(AM_CFLAGS)
AC_SUBST(AM_CPPFLAGS)
AC_SUBST(AM_LDFLAGS)

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

AC_CONFIG_FILES([
Makefile
scamp.spec
doc/Makefile
doc/src/conf.py
man/Makefile
man/scamp.1
src/Makefile
src/fits/Makefile
src/wcs/Makefile
tests/Makefile
])
AC_OUTPUT