path: root/config/cmake/ConfigureChecks.cmake

#-----------------------------------------------------------------------------
# Include all the necessary files for macros
#-----------------------------------------------------------------------------
set (HDF_PREFIX "H5")
include (${HDF_RESOURCES_EXT_DIR}/ConfigureChecks.cmake)
include (${CMAKE_ROOT}/Modules/TestForSTDNamespace.cmake)

#-----------------------------------------------------------------------------
# Option to Clear File Buffers before write --enable-clear-file-buffers
#-----------------------------------------------------------------------------
option (HDF5_Enable_Clear_File_Buffers "Securely clear file buffers before writing to file" ON)
if (HDF5_Enable_Clear_File_Buffers)
  set (H5_CLEAR_MEMORY 1)
endif (HDF5_Enable_Clear_File_Buffers)
MARK_AS_ADVANCED (HDF5_Enable_Clear_File_Buffers)

#-----------------------------------------------------------------------------
# Option for --enable-strict-format-checks
#-----------------------------------------------------------------------------
option (HDF5_STRICT_FORMAT_CHECKS "Whether to perform strict file format checks" OFF)
if (HDF5_STRICT_FORMAT_CHECKS)
  set (H5_STRICT_FORMAT_CHECKS 1)
endif (HDF5_STRICT_FORMAT_CHECKS)
MARK_AS_ADVANCED (HDF5_STRICT_FORMAT_CHECKS)

#-----------------------------------------------------------------------------
# Option for --enable-metadata-trace-file
#-----------------------------------------------------------------------------
option (HDF5_METADATA_TRACE_FILE "Enable metadata trace file collection" OFF)
if (HDF5_METADATA_TRACE_FILE)
  set (H5_METADATA_TRACE_FILE 1)
endif (HDF5_METADATA_TRACE_FILE)
MARK_AS_ADVANCED (HDF5_METADATA_TRACE_FILE)

# ----------------------------------------------------------------------
# Decide whether the data accuracy has higher priority during data
# conversions.  If not, some hard conversions will still be prefered even
# though the data may be wrong (for example, some compilers don't
# support denormalized floating values) to maximize speed.
#
option (HDF5_WANT_DATA_ACCURACY "IF data accuracy is guaranteed during data conversions" ON)
if (HDF5_WANT_DATA_ACCURACY)
  set (H5_WANT_DATA_ACCURACY 1)
endif (HDF5_WANT_DATA_ACCURACY)
MARK_AS_ADVANCED (HDF5_WANT_DATA_ACCURACY)

# ----------------------------------------------------------------------
# Decide whether the presence of user's exception handling functions is
# checked and data conversion exceptions are returned.  This is mainly
# for the speed optimization of hard conversions.  Soft conversions can
# actually benefit little.
#
option (HDF5_WANT_DCONV_EXCEPTION "exception handling functions is checked during data conversions" ON)
if (HDF5_WANT_DCONV_EXCEPTION)
  set (H5_WANT_DCONV_EXCEPTION 1)
endif (HDF5_WANT_DCONV_EXCEPTION)
MARK_AS_ADVANCED (HDF5_WANT_DCONV_EXCEPTION)

# ----------------------------------------------------------------------
# Check if they would like the function stack support compiled in
#
option (HDF5_ENABLE_CODESTACK "Enable the function stack tracing (for developer debugging)." OFF)
if (HDF5_ENABLE_CODESTACK)
  set (H5_HAVE_CODESTACK 1)
endif (HDF5_ENABLE_CODESTACK)
MARK_AS_ADVANCED (HDF5_ENABLE_CODESTACK)

#-----------------------------------------------------------------------------
#  Are we going to use HSIZE_T
#-----------------------------------------------------------------------------
option (HDF5_ENABLE_HSIZET "Enable datasets larger than memory" ON)
if (HDF5_ENABLE_HSIZET)
  set (${HDF_PREFIX}_HAVE_LARGE_HSIZET 1)
endif (HDF5_ENABLE_HSIZET)

# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can handle converting
# floating-point to long long values.
# (This flag should be _unset_ for all machines)
#
#  set (H5_HW_FP_TO_LLONG_NOT_WORKS 0)

# so far we have no check for this
set (H5_HAVE_TMPFILE 1)

# TODO --------------------------------------------------------------------------
# Should the Default Virtual File Driver be compiled?
# This is hard-coded now but option should added to match configure
#
set (H5_DEFAULT_VFD H5FD_SEC2)

if (NOT DEFINED "H5_DEFAULT_PLUGINDIR")
  if (WINDOWS)
    set (H5_DEFAULT_PLUGINDIR "%ALLUSERSPROFILE%/hdf5/lib/plugin")
  else (WINDOWS)
    set (H5_DEFAULT_PLUGINDIR "/usr/local/hdf5/lib/plugin")
  endif (WINDOWS)
endif (NOT DEFINED "H5_DEFAULT_PLUGINDIR")

if (WINDOWS)
  set (H5_HAVE_WINDOWS 1)
  # ----------------------------------------------------------------------
  # Set the flag to indicate that the machine has window style pathname,
  # that is, "drive-letter:\" (e.g. "C:") or "drive-letter:/" (e.g. "C:/").
  # (This flag should be _unset_ for all machines, except for Windows)
  set (H5_HAVE_WINDOW_PATH 1)
endif (WINDOWS)

if (WINDOWS)
  #-----------------------------------------------------------------------------
  # These tests need to be manually SET for windows since there is currently
  # something not quite correct with the actual test implementation. This affects
  # the 'dt_arith' test and most likely lots of other code
  # ----------------------------------------------------------------------------
  set (H5_FP_TO_ULLONG_RIGHT_MAXIMUM "" CACHE INTERNAL "")
endif (WINDOWS)

# ----------------------------------------------------------------------
# END of WINDOWS Hard code Values
# ----------------------------------------------------------------------

CHECK_FUNCTION_EXISTS (difftime          H5_HAVE_DIFFTIME)
#CHECK_FUNCTION_EXISTS (gettimeofday      H5_HAVE_GETTIMEOFDAY)
#  Since gettimeofday is not defined any where standard, lets look in all the
#  usual places. On MSVC we are just going to use ::clock()
if (NOT MSVC)
  if ("H5_HAVE_TIME_GETTIMEOFDAY" MATCHES "^H5_HAVE_TIME_GETTIMEOFDAY$")
    TRY_COMPILE (HAVE_TIME_GETTIMEOFDAY
        ${CMAKE_BINARY_DIR}
        ${HDF_RESOURCES_EXT_DIR}/GetTimeOfDayTest.cpp
        COMPILE_DEFINITIONS -DTRY_TIME_H
        OUTPUT_VARIABLE OUTPUT
    )
    if (HAVE_TIME_GETTIMEOFDAY STREQUAL "TRUE")
      set (H5_HAVE_TIME_GETTIMEOFDAY "1" CACHE INTERNAL "H5_HAVE_TIME_GETTIMEOFDAY")
      set (H5_HAVE_GETTIMEOFDAY "1" CACHE INTERNAL "H5_HAVE_GETTIMEOFDAY")
    endif (HAVE_TIME_GETTIMEOFDAY STREQUAL "TRUE")
  endif ("H5_HAVE_TIME_GETTIMEOFDAY" MATCHES "^H5_HAVE_TIME_GETTIMEOFDAY$")

  if ("H5_HAVE_SYS_TIME_GETTIMEOFDAY" MATCHES "^H5_HAVE_SYS_TIME_GETTIMEOFDAY$")
    TRY_COMPILE (HAVE_SYS_TIME_GETTIMEOFDAY
        ${CMAKE_BINARY_DIR}
        ${HDF_RESOURCES_EXT_DIR}/GetTimeOfDayTest.cpp
        COMPILE_DEFINITIONS -DTRY_SYS_TIME_H
        OUTPUT_VARIABLE OUTPUT
    )
    if (HAVE_SYS_TIME_GETTIMEOFDAY STREQUAL "TRUE")
      set (H5_HAVE_SYS_TIME_GETTIMEOFDAY "1" CACHE INTERNAL "H5_HAVE_SYS_TIME_GETTIMEOFDAY")
      set (H5_HAVE_GETTIMEOFDAY "1" CACHE INTERNAL "H5_HAVE_GETTIMEOFDAY")
    endif (HAVE_SYS_TIME_GETTIMEOFDAY STREQUAL "TRUE")
  endif ("H5_HAVE_SYS_TIME_GETTIMEOFDAY" MATCHES "^H5_HAVE_SYS_TIME_GETTIMEOFDAY$")

  if (NOT HAVE_SYS_TIME_GETTIMEOFDAY AND NOT H5_HAVE_GETTIMEOFDAY)
    message (STATUS "---------------------------------------------------------------")
    message (STATUS "Function 'gettimeofday()' was not found. HDF5 will use its")
    message (STATUS "  own implementation.. This can happen on older versions of")
    message (STATUS "  MinGW on Windows. Consider upgrading your MinGW installation")
    message (STATUS "  to a newer version such as MinGW 3.12")
    message (STATUS "---------------------------------------------------------------")
  endif (NOT HAVE_SYS_TIME_GETTIMEOFDAY AND NOT H5_HAVE_GETTIMEOFDAY)
endif (NOT MSVC)

# Find the library containing clock_gettime()
if (NOT WINDOWS)
  CHECK_FUNCTION_EXISTS(clock_gettime CLOCK_GETTIME_IN_LIBC)
  CHECK_LIBRARY_EXISTS(rt clock_gettime "" CLOCK_GETTIME_IN_LIBRT)
  CHECK_LIBRARY_EXISTS(posix4 clock_gettime "" CLOCK_GETTIME_IN_LIBPOSIX4)
  if (CLOCK_GETTIME_IN_LIBC)
    set (H5_HAVE_CLOCK_GETTIME 1)
  elseif (CLOCK_GETTIME_IN_LIBRT)
    set (H5_HAVE_CLOCK_GETTIME 1)
    list (APPEND LINK_LIBS rt)
  elseif (CLOCK_GETTIME_IN_LIBPOSIX4)
    set (H5_HAVE_CLOCK_GETTIME 1)
    list (APPEND LINK_LIBS posix4)
  endif (CLOCK_GETTIME_IN_LIBC)
endif (NOT WINDOWS)
#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------
#  Check if Direct I/O driver works
#-----------------------------------------------------------------------------
if (NOT WINDOWS)
  option (HDF5_ENABLE_DIRECT_VFD "Build the Direct I/O Virtual File Driver" ON)
  if (HDF5_ENABLE_DIRECT_VFD)
    set (msg "Performing TEST_DIRECT_VFD_WORKS")
    set (MACRO_CHECK_FUNCTION_DEFINITIONS "-DTEST_DIRECT_VFD_WORKS -D_GNU_SOURCE ${CMAKE_REQUIRED_FLAGS}")
    TRY_RUN (TEST_DIRECT_VFD_WORKS_RUN   TEST_DIRECT_VFD_WORKS_COMPILE
        ${CMAKE_BINARY_DIR}
        ${HDF_RESOURCES_EXT_DIR}/HDFTests.c
        CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
        OUTPUT_VARIABLE OUTPUT
    )
    if (TEST_DIRECT_VFD_WORKS_COMPILE)
      if (TEST_DIRECT_VFD_WORKS_RUN  MATCHES 0)
        HDF_FUNCTION_TEST (HAVE_DIRECT)
        set (CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS} -D_GNU_SOURCE")
        add_definitions ("-D_GNU_SOURCE")
      else (TEST_DIRECT_VFD_WORKS_RUN  MATCHES 0)
        set (TEST_DIRECT_VFD_WORKS "" CACHE INTERNAL ${msg})
        message (STATUS "${msg}... no")
        file (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
              "Test TEST_DIRECT_VFD_WORKS Run failed with the following output and exit code:\n ${OUTPUT}\n"
        )
      endif (TEST_DIRECT_VFD_WORKS_RUN  MATCHES 0)
    else (TEST_DIRECT_VFD_WORKS_COMPILE )
      set (TEST_DIRECT_VFD_WORKS "" CACHE INTERNAL ${msg})
      message (STATUS "${msg}... no")
      file (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
          "Test TEST_DIRECT_VFD_WORKS Compile failed with the following output:\n ${OUTPUT}\n"
      )
    endif (TEST_DIRECT_VFD_WORKS_COMPILE)
  endif (HDF5_ENABLE_DIRECT_VFD)
endif (NOT WINDOWS)


#-----------------------------------------------------------------------------
# Macro to determine the various conversion capabilities
#-----------------------------------------------------------------------------
MACRO (H5ConversionTests TEST msg)
  if ("${TEST}" MATCHES "^${TEST}$")
   # message (STATUS "===> ${TEST}")
    TRY_RUN (${TEST}_RUN   ${TEST}_COMPILE
        ${CMAKE_BINARY_DIR}
        ${HDF_RESOURCES_DIR}/ConversionTests.c
        CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=-D${TEST}_TEST
        OUTPUT_VARIABLE OUTPUT
    )
    if (${TEST}_COMPILE)
      if (${TEST}_RUN  MATCHES 0)
        set (${TEST} 1 CACHE INTERNAL ${msg})
        message (STATUS "${msg}... yes")
      else (${TEST}_RUN  MATCHES 0)
        set (${TEST} "" CACHE INTERNAL ${msg})
        message (STATUS "${msg}... no")
        file (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
              "Test ${TEST} Run failed with the following output and exit code:\n ${OUTPUT}\n"
        )
      endif (${TEST}_RUN  MATCHES 0)
    else (${TEST}_COMPILE )
      set (${TEST} "" CACHE INTERNAL ${msg})
      message (STATUS "${msg}... no")
      file (APPEND ${CMAKE_BINARY_DIR}/CMakeFiles/CMakeError.log
          "Test ${TEST} Compile failed with the following output:\n ${OUTPUT}\n"
      )
    endif (${TEST}_COMPILE)

  endif ("${TEST}" MATCHES "^${TEST}$")
ENDMACRO (H5ConversionTests)

#-----------------------------------------------------------------------------
# Macro to make some of the conversion tests easier to write/read
#-----------------------------------------------------------------------------
MACRO (H5MiscConversionTest  VAR TEST msg)
  if ("${TEST}" MATCHES "^${TEST}$")
    if (${VAR})
      set (${TEST} 1 CACHE INTERNAL ${msg})
      message (STATUS "${msg}... yes")
    else (${VAR})
      set (${TEST} "" CACHE INTERNAL ${msg})
      message (STATUS "${msg}... no")
    endif (${VAR})
  endif ("${TEST}" MATCHES "^${TEST}$")
ENDMACRO (H5MiscConversionTest)

#-----------------------------------------------------------------------------
# Check various conversion capabilities
#-----------------------------------------------------------------------------

# -----------------------------------------------------------------------
# Set flag to indicate that the machine can handle conversion from
# long double to integers accurately.  This flag should be set "yes" for
# all machines except all SGIs.  For SGIs, some conversions are
# incorrect and its cache value is set "no" in its config/irix6.x and
# irix5.x.
#
H5MiscConversionTest (H5_SIZEOF_LONG_DOUBLE H5_LDOUBLE_TO_INTEGER_ACCURATE "checking IF converting from long double to integers is accurate")
# -----------------------------------------------------------------------
# Set flag to indicate that the machine can do conversion from
# long double to integers regardless of accuracy.  This flag should be
# set "yes" for all machines except HP-UX 11.00.  For HP-UX 11.00, the
# compiler has 'floating exception' when converting 'long double' to all
# integers except 'unsigned long long'.  Other HP-UX systems are unknown
# yet. (1/8/05 - SLU)
#
if (NOT MSVC)
  H5ConversionTests (H5_LDOUBLE_TO_INTEGER_WORKS "Checking IF converting from long double to integers works")
endif (NOT MSVC)
# -----------------------------------------------------------------------
# Set flag to indicate that the machine can handle conversion from
# integers to long double.  (This flag should be set "yes" for all
# machines except all SGIs, where some conversions are
# incorrect and its cache value is set "no" in its config/irix6.x and
# irix5.x)
#
H5MiscConversionTest (H5_SIZEOF_LONG_DOUBLE H5_INTEGER_TO_LDOUBLE_ACCURATE "checking IF accurately converting from integers to long double")
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can accurately convert
# 'unsigned long' to 'float' values.
# (This flag should be set for all machines, except for Pathscale compiler
# on Sandia's Linux machine where the compiler interprets 'unsigned long'
# values as negative when the first bit of 'unsigned long' is on during
# the conversion to float.)
#
H5ConversionTests (H5_ULONG_TO_FLOAT_ACCURATE "Checking IF accurately converting unsigned long to float values")
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can accurately convert
# 'unsigned (long) long' values to 'float' and 'double' values.
# (This flag should be set for all machines, except for the SGIs, where
# the cache value is set in the config/irix6.x config file) and Solaris
# 64-bit machines, where the short program below tests if round-up is
# correctly handled.
#
if (CMAKE_SYSTEM MATCHES "solaris2.*")
  H5ConversionTests (H5_ULONG_TO_FP_BOTTOM_BIT_ACCURATE "Checking IF accurately converting unsigned long long to floating-point values")
else (CMAKE_SYSTEM MATCHES "solaris2.*")
  set (H5_ULONG_TO_FP_BOTTOM_BIT_ACCURATE 1)
endif (CMAKE_SYSTEM MATCHES "solaris2.*")
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can accurately convert
# 'float' or 'double' to 'unsigned long long' values.
# (This flag should be set for all machines, except for PGI compiler
# where round-up happens when the fraction of float-point value is greater
# than 0.5.
#
H5ConversionTests (H5_FP_TO_ULLONG_ACCURATE "Checking IF accurately roundup converting floating-point to unsigned long long values" )
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can accurately convert
# 'float', 'double' or 'long double' to 'unsigned long long' values.
# (This flag should be set for all machines, except for HP-UX machines
# where the maximal number for unsigned long long is 0x7fffffffffffffff
# during conversion.
#
H5ConversionTests (H5_FP_TO_ULLONG_RIGHT_MAXIMUM "Checking IF right maximum converting floating-point to unsigned long long values" )
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can accurately convert
# 'long double' to 'unsigned int' values.  (This flag should be set for
# all machines, except for some Intel compilers on some Linux.)
#
H5ConversionTests (H5_LDOUBLE_TO_UINT_ACCURATE "Checking IF correctly converting long double to unsigned int values")
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can _compile_
# 'unsigned long long' to 'float' and 'double' typecasts.
# (This flag should be set for all machines.)
#
if (H5_ULLONG_TO_FP_CAST_WORKS MATCHES ^H5_ULLONG_TO_FP_CAST_WORKS$)
  set (H5_ULLONG_TO_FP_CAST_WORKS 1 CACHE INTERNAL "Checking IF compiling unsigned long long to floating-point typecasts work")
  message (STATUS "Checking IF compiling unsigned long long to floating-point typecasts work... yes")
endif (H5_ULLONG_TO_FP_CAST_WORKS MATCHES ^H5_ULLONG_TO_FP_CAST_WORKS$)
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can _compile_
# 'long long' to 'float' and 'double' typecasts.
# (This flag should be set for all machines.)
#
if (H5_LLONG_TO_FP_CAST_WORKS MATCHES ^H5_LLONG_TO_FP_CAST_WORKS$)
  set (H5_LLONG_TO_FP_CAST_WORKS 1 CACHE INTERNAL "Checking IF compiling long long to floating-point typecasts work")
  message (STATUS "Checking IF compiling long long to floating-point typecasts work... yes")
endif (H5_LLONG_TO_FP_CAST_WORKS MATCHES ^H5_LLONG_TO_FP_CAST_WORKS$)
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can convert from
# 'unsigned long long' to 'long double' without precision loss.
# (This flag should be set for all machines, except for FreeBSD(sleipnir)
# where the last 2 bytes of mantissa are lost when compiler tries to do
# the conversion, and Cygwin where compiler doesn't do rounding correctly.)
#
if (NOT MSVC)
  H5ConversionTests (H5_ULLONG_TO_LDOUBLE_PRECISION "Checking IF converting unsigned long long to long double with precision")
endif (NOT MSVC)
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can handle overflow converting
# all floating-point to all integer types.
# (This flag should be set for all machines, except for Cray X1 where
# floating exception is generated when the floating-point value is greater
# than the maximal integer value).
#
H5ConversionTests (H5_FP_TO_INTEGER_OVERFLOW_WORKS  "Checking IF overflows normally converting floating-point to integer values")
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine is using a special algorithm to convert
# 'long double' to '(unsigned) long' values.  (This flag should only be set for 
# the IBM Power6 Linux.  When the bit sequence of long double is 
# 0x4351ccf385ebc8a0bfcc2a3c3d855620, the converted value of (unsigned)long 
# is 0x004733ce17af227f, not the same as the library's conversion to 0x004733ce17af2282.
# The machine's conversion gets the correct value.  We define the macro and disable
# this kind of test until we figure out what algorithm they use.
#
if (H5_LDOUBLE_TO_LONG_SPECIAL MATCHES ^H5_LDOUBLE_TO_LONG_SPECIAL$)
  set (H5_LDOUBLE_TO_LONG_SPECIAL 0 CACHE INTERNAL "Define if your system converts long double to (unsigned) long values with special algorithm")
  message (STATUS "Checking IF your system converts long double to (unsigned) long values with special algorithm... no")
endif (H5_LDOUBLE_TO_LONG_SPECIAL MATCHES ^H5_LDOUBLE_TO_LONG_SPECIAL$)
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine is using a special algorithm
# to convert some values of '(unsigned) long' to 'long double' values.  
# (This flag should be off for all machines, except for IBM Power6 Linux, 
# when the bit sequences are 003fff..., 007fff..., 00ffff..., 01ffff..., 
# ..., 7fffff..., the compiler uses a unknown algorithm.  We define a 
# macro and skip the test for now until we know about the algorithm.
#
if (H5_LONG_TO_LDOUBLE_SPECIAL MATCHES ^H5_LONG_TO_LDOUBLE_SPECIAL$)
  set (H5_LONG_TO_LDOUBLE_SPECIAL 0 CACHE INTERNAL "Define if your system can convert (unsigned) long to long double values with special algorithm")
  message (STATUS "Checking IF your system can convert (unsigned) long to long double values with special algorithm... no")
endif (H5_LONG_TO_LDOUBLE_SPECIAL MATCHES ^H5_LONG_TO_LDOUBLE_SPECIAL$)
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can accurately convert
# 'long double' to '(unsigned) long long' values.  (This flag should be set for
# all machines, except for Mac OS 10.4 and SGI IRIX64 6.5.  When the bit sequence
# of long double is 0x4351ccf385ebc8a0bfcc2a3c..., the values of (unsigned)long long
# start to go wrong on these two machines.  Adjusting it higher to
# 0x4351ccf385ebc8a0dfcc... or 0x4351ccf385ebc8a0ffcc... will make the converted
# values wildly wrong.  This test detects this wrong behavior and disable the test.
#
H5ConversionTests (H5_LDOUBLE_TO_LLONG_ACCURATE "Checking IF correctly converting long double to (unsigned) long long values")
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine can accurately convert
# '(unsigned) long long' to 'long double' values.  (This flag should be set for
# all machines, except for Mac OS 10.4, when the bit sequences are 003fff...,
# 007fff..., 00ffff..., 01ffff..., ..., 7fffff..., the converted values are twice
# as big as they should be.
#
H5ConversionTests (H5_LLONG_TO_LDOUBLE_CORRECT "Checking IF correctly converting (unsigned) long long to long double values")
# ----------------------------------------------------------------------
# Set the flag to indicate that the machine generates bad code
# for the H5VM_log2_gen() routine in src/H5VMprivate.h
# (This flag should be set to no for all machines, except for SGI IRIX64,
# where the cache value is set to yes in it's config file)
#
if (H5_BAD_LOG2_CODE_GENERATED MATCHES ^H5_BAD_LOG2_CODE_GENERATED$)
  set (H5_BAD_LOG2_CODE_GENERATED 0 CACHE INTERNAL "Define if your system generates wrong code for log2 routine")
  message (STATUS "Checking IF your system generates wrong code for log2 routine... no")
endif (H5_BAD_LOG2_CODE_GENERATED MATCHES ^H5_BAD_LOG2_CODE_GENERATED$)
# ----------------------------------------------------------------------
# Check if pointer alignments are enforced
#
H5ConversionTests (H5_NO_ALIGNMENT_RESTRICTIONS "Checking IF alignment restrictions are strictly enforced")

# Define a macro for Cygwin (on XP only) where the compiler has rounding
#   problem converting from unsigned long long to long double */
if (CYGWIN)
  set (H5_CYGWIN_ULLONG_TO_LDOUBLE_ROUND_PROBLEM 1)
endif (CYGWIN)

# -----------------------------------------------------------------------
# wrapper script variables
# 
set (prefix ${CMAKE_INSTALL_PREFIX})
set (exec_prefix "\${prefix}")
set (libdir "${exec_prefix}/lib")
set (includedir "\${prefix}/include")
set (host_os ${CMAKE_HOST_SYSTEM_NAME})
set (CC ${CMAKE_C_COMPILER})
set (CXX ${CMAKE_CXX_COMPILER})
set (FC ${CMAKE_Fortran_COMPILER})
foreach (LINK_LIB ${LINK_LIBS})
  set (LIBS "${LIBS} -l${LINK_LIB}")
endforeach (LINK_LIB ${LINK_LIBS})