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AC_PREREQ([2.63])
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AC_INIT([lalinference],[1.3.1.1],[lal-discuss@ligo.org])
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AC_CONFIG_HEADERS([src/config.h src/LALInferenceConfig.h])
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AC_CONFIG_SRCDIR([src/LALInference.h])
AC_CONFIG_AUX_DIR([gnuscripts])
AC_CONFIG_MACRO_DIR([gnuscripts])
AC_CONFIG_FILES([ \
  lalinference.spec \
  lalinference.pc \
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  lalinference-uninstalled.pc \
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  Makefile \
  gnuscripts/Makefile \
  debian/Makefile \
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  bin/Makefile \
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  include/Makefile \
  include/lal/Makefile \
  src/Makefile \
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  python/Makefile \
  python/__init__.py \
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  python/bayestar/Makefile \
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  swig/Makefile \
  swig/octave/Makefile \
  swig/python/Makefile \
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  test/Makefile
])
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AM_INIT_AUTOMAKE([1.11 foreign subdir-objects color-tests parallel-tests])
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AC_CANONICAL_HOST

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LALSUITE_CHECK_GIT_REPO
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LALSUITE_DISTCHECK_CONFIGURE_FLAGS
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# set library api info
# 1. start with version information of "0:0:0" for each libtool library
# 2. update the version information only immediately before a public
#    release of your software. More frequent updates are unnecessary,
#    and only guarantee that the current interface number gets larger
#    faster.
# 3. if the library source code has changed at all since the last
#    update, then increment revision ("c:r:a" becomes "c:r+1:a").
# 4. if any interfaces have been added, removed, or changed since the
#    last update, increment current, and set revision to 0.
# 5. if any interfaces have been added since the last public release,
#    then increment age.
# 6. if any interfaces have been removed since the last public release,
#    then set age to 0.
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AC_SUBST([LIBCURRENT],[7])
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AC_SUBST([LIBREVISION],[0])
AC_SUBST([LIBAGE],[0])
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AC_SUBST([LIBVERSION],[${LIBCURRENT}:${LIBREVISION}:${LIBAGE}])

# nightly build
LALSUITE_ENABLE_NIGHTLY

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# enable strict gcc flags
LALSUITE_ENABLE_GCC_FLAGS

# optional lal libraries
LALSUITE_ENABLE_LALFRAME
LALSUITE_ENABLE_LALMETAIO
LALSUITE_ENABLE_LALINSPIRAL
LALSUITE_ENABLE_LALPULSAR
LALSUITE_ENABLE_LALXML

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# enable SWIG wrapping modules
LALSUITE_ENABLE_SWIG

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# define version/configure info
LALSUITE_VERSION_CONFIGURE_INFO
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# workaround broken libtool multilib support on sl6
LALSUITE_MULTILIB_LIBTOOL_HACK

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# use silent build rules
AM_SILENT_RULES([yes])
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# check for required compilers
LALSUITE_PROG_COMPILERS
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# checks for programs
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AC_PROG_INSTALL
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AC_PROG_LN_S
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AC_PROG_AWK
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AC_PROG_SED
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AM_PATH_PYTHON([2.6],,[AC_MSG_ERROR([Python-2.6, or higher, is required])])
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# check for supported mac os x version
LALSUITE_OSX_VERSION_CHECK

# link tests using libtool
LALSUITE_USE_LIBTOOL

# check for header files
AC_HEADER_STDC

# check for required libraries
AC_CHECK_LIB([m],[main],,[AC_MSG_ERROR([could not find the math library])])

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# check for OpenMP
AC_OPENMP

# check that compiler supports C99 variable length arrays in OpenMP for loops.
# Apple's llvm-gcc-4.2 is buggy and does not.
AS_IF([test "x$OPENMP_CFLAGS" != "x"],
  [
    AC_MSG_CHECKING([if compiler supports C99 VLAs in OpenMP for loops])
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    LALSUITE_PUSH_UVARS
    CFLAGS="$OPENMP_CFLAGS"
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    AC_LINK_IFELSE([
        AC_LANG_PROGRAM(, [
          int i, n = 10;
          #pragma omp parallel for
          for (i = 0; i < 10; i ++)
          { int a@<:@n@:>@; }
        ])
      ],
      [AC_MSG_RESULT([yes])],
      [
        AC_MSG_RESULT([no, disabling OpenMP])
        OPENMP_CFLAGS=
      ]
    )
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    LALSUITE_POP_UVARS
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  ]
)

# check for HEALPix
PKG_CHECK_MODULES([CHEALPIX],[chealpix],[true],[false])
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LALSUITE_ADD_FLAGS([C],[${CHEALPIX_CFLAGS}],[${CHEALPIX_LIBS}])
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AC_CHECK_LIB([chealpix],[nside2npix],[HEALPIX_ENABLE_VAL=ENABLED],[HEALPIX_ENABLE_VAL=DISABLED])
AM_CONDITIONAL([HAVE_CHEALPIX],[test "x$HEALPIX_ENABLE_VAL" = "xENABLED"])

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# check for gsl
PKG_CHECK_MODULES([GSL],[gsl],[true],[false])
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LALSUITE_ADD_FLAGS([C],[${GSL_CFLAGS}],[${GSL_LIBS}])
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AC_CHECK_LIB([gslcblas],[main],,[AC_MSG_ERROR([could not find the gsl library])])
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AC_CHECK_LIB([gsl],[gsl_version],,[AC_MSG_ERROR([could not find the gsl library])])
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LALSUITE_CHECK_GSL_VERSION([1.13])
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LALSUITE_ENABLE_FAST_GSL
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# check for gsl headers
AC_CHECK_HEADERS([gsl/gsl_errno.h],,[AC_MSG_ERROR([could not find the gsl/gsl_errno.h header])])

# metaio
PKG_CHECK_MODULES([METAIO],[libmetaio],[true],[false])
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LALSUITE_ADD_FLAGS([C],[${METAIO_CFLAGS}],[${METAIO_LIBS}])
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AC_CHECK_LIB([metaio],[MetaioOpen],,[AC_MSG_ERROR([could not find the metaio library])])

# check for libmetaio headers
AC_CHECK_HEADERS([metaio.h],,[AC_MSG_ERROR([could not find the metaio.h header])])

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if test "$lalxml" = "true"; then
  # check for libxml2
  PKG_CHECK_MODULES([LIBXML2],[libxml-2.0 >= 2.6],[true],[false])
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  LALSUITE_ADD_FLAGS([C],[${LIBXML2_CFLAGS}],[${LIBXML2_LIBS}])
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  AC_CHECK_LIB([xml2],[xmlInitParser],,[AC_MSG_WARN([cannot find the xml2 library])])
fi

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# check for lal libraries and headers
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LALSUITE_CHECK_LIB([LAL],[6.12.0],[LALVersion],[lal/LALStdio.h])
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LALSUITE_CHECK_LIB([LALSupport],[6.12.0],[XLALCacheImport],[lal/LALCache.h])
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LALSUITE_CHECK_LIB([LALMetaIO],[1.2.0],[XLALCreateMetaTableDir],[lal/LIGOLwXMLRead.h])
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LALSUITE_CHECK_LIB([LALFrame],[1.1.0],[LALFrOpen],[lal/LALFrameL.h])
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LALSUITE_CHECK_LIB([LALSimulation],[1.1.0],[XLALSimDetectorStrainREAL8TimeSeries],[lal/LALSimulation.h])
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LALSUITE_CHECK_LIB([LALInspiral],[1.5.0],[LALInspiralParameterCalc],[lal/LALInspiral.h])
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LALSUITE_CHECK_LIB([LALPulsar],[1.9.0],[XLALComputeFstat],[lal/ComputeFstat.h])
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# check for lalxml
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LALSUITE_CHECK_OPT_LIB([LALXML],[1.1.5],[XLALXMLFilePrintElements],[lal/LALXML.h])
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# configure SWIG wrapping modules
LALSUITE_USE_SWIG([XLALInference LALInference XLAL LAL])

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# Disable OpenMP by default.
# FIXME: OpenMP should be on by default, but it breaks condor_compiling lalapps.
AS_IF(
  [test "x$enable_openmp" = "x"],
  [OPENMP_CFLAGS=]
)
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# add compiler flags for OpenMP
AS_IF(
  [test "x$OPENMP_CFLAGS" = "x"],
  [
    OPENMP_ENABLE_VAL="DISABLED"
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    LALSUITE_ADD_FLAGS([C],[-Wno-unknown-pragmas],[])
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  ],
  [
    OPENMP_ENABLE_VAL="ENABLED"
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    LALSUITE_ADD_FLAGS([C],[${OPENMP_CFLAGS}],[])
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  ]
)

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# add gcc specific flags
LALSUITE_ADD_GCC_FLAGS

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# force all python modules into the exec dir to prevent mixed C and
# pure-python library code from being split across lib and lib64 on
# RedHat-derived systems.
AC_SUBST([pkgpythondir], ["\${pkgpyexecdir}"])

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LAL_HEADER_LINK=${ac_aux_dir}/header-link.mk
AC_SUBST_FILE([LAL_HEADER_LINK])
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# output
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AC_OUTPUT
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AC_MSG_NOTICE([
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==================================================
LALInference has now been successfully configured:
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* LALXML library support is $LALXML_ENABLE_VAL
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* SWIG wrapping module for Octave is $SWIG_OCTAVE_ENABLE_VAL
* SWIG wrapping module for Python is $SWIG_PYTHON_ENABLE_VAL
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* HEALPix is $HEALPIX_ENABLE_VAL
* OpenMP acceleration is $OPENMP_ENABLE_VAL
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and will be installed under the directory:
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${prefix}
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Now run 'make' to build LALInference,
and run 'make install' to install LALInference.
==================================================
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])