dnl
dnl Binary distribution configure script
dnl
#!/bin/sh
#

AC_INIT([The Glorious Glasgow Haskell Compilation System], [@ProjectVersion@], [glasgow-haskell-bugs@haskell.org], [ghc])

FP_BINDIST_GHC_PWD
FP_FIND_ROOT

dnl--------------------------------------------------------------------
dnl * Deal with arguments telling us gmp is somewhere odd
dnl--------------------------------------------------------------------

FP_GMP

bootstrap_target=@TargetPlatform@
FPTOOLS_SET_PLATFORM_VARS

# ToDo: if Stage1Only=YES, should be YES
CrossCompiling=NO
CrossCompilePrefix=""
TargetPlatformFull="${target}"

AC_SUBST(CrossCompiling)
AC_SUBST(CrossCompilePrefix)
AC_SUBST(TargetPlatformFull)

Unregisterised="@Unregisterised@"
AC_SUBST(Unregisterised)

#
dnl ** Check Perl installation **
#
AC_PATH_PROG(PerlCmd,perl)
if test -z "$PerlCmd"; then
   echo "You must install perl before you can continue"
   echo "Perhaps it is already installed, but not in your PATH?"
   exit 1
fi

#
dnl ** figure out how to do a BSD-ish install **
#
AC_PROG_INSTALL

#
dnl ** how to do symlinks **
#
AC_PROG_LN_S()

#
dnl ** Find the path to sed **
#
AC_PATH_PROG(SedCmd,gsed sed,sed)

XCODE_VERSION()

dnl ** Which gcc to use?
dnl --------------------------------------------------------------
FIND_GCC([WhatGccIsCalled], [gcc], [gcc])
CC="$WhatGccIsCalled"
export CC


dnl ** what cpp to use?
dnl --------------------------------------------------------------
AC_ARG_WITH(hs-cpp,
[AC_HELP_STRING([--with-hs-cpp=ARG],
        [Use ARG as the path to cpp [default=autodetect]])],
[
    if test "$HostOS" = "mingw32"
    then
        AC_MSG_WARN([Request to use $withval will be ignored])
    else
        HaskellCPPCmd=$withval
    fi
],
[
    if test "$HostOS" != "mingw32"
    then
        HaskellCPPCmd=$WhatGccIsCalled
    fi
]
)



dnl ** what cpp flags to use?
dnl -----------------------------------------------------------
AC_ARG_WITH(hs-cpp-flags,
  [AC_HELP_STRING([--with-hs-cpp-flags=ARG],
          [Use ARG as the path to hs cpp [default=autodetect]])],
  [
      if test "$HostOS" = "mingw32"
      then
          AC_MSG_WARN([Request to use $withval will be ignored])
      else
          HaskellCPPArgs=$withval
      fi
  ],
[
  $HaskellCPPCmd -x c /dev/null -dM -E > conftest.txt 2>&1
  if grep "__clang__" conftest.txt >/dev/null 2>&1; then
    HaskellCPPArgs="-E -undef -traditional -Wno-invalid-pp-token -Wno-unicode -Wno-trigraphs "
  else
      $HaskellCPPCmd  -v > conftest.txt 2>&1
      if  grep "gcc" conftest.txt >/dev/null 2>&1; then
          HaskellCPPArgs="-E -undef -traditional "
        else
          $HaskellCPPCmd  --version > conftest.txt 2>&1
          if grep "cpphs" conftest.txt >/dev/null 2>&1; then
            HaskellCPPArgs="--cpp -traditional"
          else
            AC_MSG_WARN([configure can't recognize your CPP program, you may need to set --with-hs-cpp-flags=FLAGS explicitly])
            HaskellCPPArgs=""
          fi
      fi
  fi
  ]
)


dnl ** Which ld to use?
dnl --------------------------------------------------------------
FP_ARG_WITH_PATH_GNU_PROG([LD], [ld], [ld])
LdCmd="$LD"
AC_SUBST([LdCmd])

FP_GCC_VERSION
AC_PROG_CPP

FP_PROG_LD_IS_GNU
FP_PROG_LD_BUILD_ID
FP_PROG_LD_NO_COMPACT_UNWIND
FP_PROG_LD_FILELIST

#
dnl ** Check gcc version and flags we need to pass it **
#
FP_GCC_EXTRA_FLAGS

FPTOOLS_SET_C_LD_FLAGS([target],[CFLAGS],[LDFLAGS],[IGNORE_LINKER_LD_FLAGS],[CPPFLAGS])
FPTOOLS_SET_C_LD_FLAGS([build],[CONF_CC_OPTS_STAGE0],[CONF_GCC_LINKER_OPTS_STAGE0],[CONF_LD_LINKER_OPTS_STAGE0],[CONF_CPP_OPTS_STAGE0])
FPTOOLS_SET_C_LD_FLAGS([target],[CONF_CC_OPTS_STAGE1],[CONF_GCC_LINKER_OPTS_STAGE1],[CONF_LD_LINKER_OPTS_STAGE1],[CONF_CPP_OPTS_STAGE1])
# Stage 3 won't be supported by cross-compilation
FPTOOLS_SET_C_LD_FLAGS([target],[CONF_CC_OPTS_STAGE2],[CONF_GCC_LINKER_OPTS_STAGE2],[CONF_LD_LINKER_OPTS_STAGE2],[CONF_CPP_OPTS_STAGE2])

AC_SUBST(CONF_CC_OPTS_STAGE0)
AC_SUBST(CONF_CC_OPTS_STAGE1)
AC_SUBST(CONF_CC_OPTS_STAGE2)
AC_SUBST(CONF_GCC_LINKER_OPTS_STAGE0)
AC_SUBST(CONF_GCC_LINKER_OPTS_STAGE1)
AC_SUBST(CONF_GCC_LINKER_OPTS_STAGE2)
AC_SUBST(CONF_LD_LINKER_OPTS_STAGE0)
AC_SUBST(CONF_LD_LINKER_OPTS_STAGE1)
AC_SUBST(CONF_LD_LINKER_OPTS_STAGE2)
AC_SUBST(CONF_CPP_OPTS_STAGE0)
AC_SUBST(CONF_CPP_OPTS_STAGE1)
AC_SUBST(CONF_CPP_OPTS_STAGE2)

dnl ** Set up the variables for the platform in the settings file.
dnl May need to use gcc to find platform details.
dnl --------------------------------------------------------------
FPTOOLS_SET_HASKELL_PLATFORM_VARS

dnl WordSize for settings.in
AC_CHECK_SIZEOF(void *, 4)
WordSize=$ac_cv_sizeof_void_p
AC_SUBST(WordSize)

#
dnl ** how to invoke `ar' and `ranlib'
#
FP_PROG_AR_SUPPORTS_ATFILE
FP_PROG_AR_NEEDS_RANLIB

FP_SETTINGS

#
AC_CONFIG_FILES(settings mk/config.mk mk/install.mk)
AC_OUTPUT

# We get caught by
#     http://savannah.gnu.org/bugs/index.php?1516
#     $(eval ...) inside conditionals causes errors
# with make 3.80, so warn the user if it looks like they're about to
# try to use it.
# We would use "grep -q" here, but Solaris's grep doesn't support it.
checkMake380() {
    if $1 --version 2>&1 | head -1 | grep 'GNU Make 3\.80' > /dev/null
    then
        echo
        echo "WARNING: It looks like \"$1\" is GNU make 3.80."
        echo "This version cannot be used to build GHC."
        echo "Please use GNU make >= 3.81."
    fi
}

checkMake380 make
checkMake380 gmake

echo "****************************************************"
echo "Configuration done, ready to 'make install'"
echo "(see README and INSTALL files for more info.)"
echo "****************************************************"