dnl ---------------------------------------------------------------------------
dnl Compiler detection macros by David Elliott
dnl ---------------------------------------------------------------------------


dnl ===========================================================================
dnl Macros to detect non-GNU compilers (MetroWerks, XLC)
dnl ===========================================================================

dnl Based on autoconf _AC_LANG_COMPILER_GNU
AC_DEFUN([_AC_BAKEFILE_LANG_COMPILER_MWERKS],
[AC_CACHE_CHECK([whether we are using the Metrowerks _AC_LANG compiler],
    [bakefile_cv_[]_AC_LANG_ABBREV[]_compiler_mwerks],
    [AC_TRY_COMPILE([],[#ifndef __MWERKS__
       choke me
#endif
],
        [bakefile_compiler_mwerks=yes],
        [bakefile_compiler_mwerks=no])
    bakefile_cv_[]_AC_LANG_ABBREV[]_compiler_mwerks=$bakefile_compiler_mwerks
    ])
])

dnl Loosely based on autoconf AC_PROG_CC
dnl TODO: Maybe this should wrap the call to AC_PROG_CC and be used instead.
AC_DEFUN([AC_BAKEFILE_PROG_MWCC],
[AC_LANG_PUSH(C)
_AC_BAKEFILE_LANG_COMPILER_MWERKS
MWCC=`test $bakefile_cv_c_compiler_mwerks = yes && echo yes`
AC_LANG_POP(C)
])

dnl Loosely based on autoconf AC_PROG_CXX
dnl TODO: Maybe this should wrap the call to AC_PROG_CXX and be used instead.
AC_DEFUN([AC_BAKEFILE_PROG_MWCXX],
[AC_LANG_PUSH(C++)
_AC_BAKEFILE_LANG_COMPILER_MWERKS
MWCXX=`test $bakefile_cv_cxx_compiler_mwerks = yes && echo yes`
AC_LANG_POP(C++)
])

dnl Based on autoconf _AC_LANG_COMPILER_GNU
AC_DEFUN([_AC_BAKEFILE_LANG_COMPILER_XLC],
[AC_CACHE_CHECK([whether we are using the IBM xlC _AC_LANG compiler],
    [bakefile_cv_[]_AC_LANG_ABBREV[]_compiler_xlc],
    [AC_TRY_COMPILE([],[#ifndef __xlC__
       choke me
#endif
],
        [bakefile_compiler_xlc=yes],
        [bakefile_compiler_xlc=no])
    bakefile_cv_[]_AC_LANG_ABBREV[]_compiler_xlc=$bakefile_compiler_xlc
    ])
])

dnl Loosely based on autoconf AC_PROG_CC
AC_DEFUN([AC_BAKEFILE_PROG_XLCC],
[AC_LANG_PUSH(C)
_AC_BAKEFILE_LANG_COMPILER_XLC
XLCC=`test $bakefile_cv_c_compiler_xlc = yes && echo yes`
AC_LANG_POP(C)
])

dnl Loosely based on autoconf AC_PROG_CXX
AC_DEFUN([AC_BAKEFILE_PROG_XLCXX],
[AC_LANG_PUSH(C++)
_AC_BAKEFILE_LANG_COMPILER_XLC
XLCXX=`test $bakefile_cv_cxx_compiler_xlc = yes && echo yes`
AC_LANG_POP(C++)
])

dnl Based on autoconf _AC_LANG_COMPILER_GNU
dnl _AC_BAKEFILE_LANG_COMPILER(NAME, LANG, SYMBOL, IF-YES, IF-NO)
AC_DEFUN([_AC_BAKEFILE_LANG_COMPILER],
[
    AC_LANG_PUSH($2)
    AC_CACHE_CHECK(
        [whether we are using the $1 $2 compiler],
        [bakefile_cv_[]_AC_LANG_ABBREV[]_compiler_[]$3],
        [AC_TRY_COMPILE(
            [],
            [
             #ifndef $3
                choke me
             #endif
            ],
            [bakefile_cv_[]_AC_LANG_ABBREV[]_compiler_[]$3=yes],
            [bakefile_cv_[]_AC_LANG_ABBREV[]_compiler_[]$3=no]
         )
        ]
    )
    AC_LANG_POP($2)
    if test "x$bakefile_cv_[]_AC_LANG_ABBREV[]_compiler_[]$3" = "xyes"; then
        :; $4
    else
        :; $5
    fi
])

dnl recent versions of SGI mipsPro compiler define _SGI_COMPILER_VERSION
dnl
dnl NB: old versions define _COMPILER_VERSION but this could probably be
dnl     defined by other compilers too so don't test for it to be safe
AC_DEFUN([AC_BAKEFILE_PROG_SGICC],
[
    _AC_BAKEFILE_LANG_COMPILER(SGI, C, _SGI_COMPILER_VERSION, SGICC=yes)
])

AC_DEFUN([AC_BAKEFILE_PROG_SGICXX],
[
    _AC_BAKEFILE_LANG_COMPILER(SGI, C++, _SGI_COMPILER_VERSION, SGICXX=yes)
])

dnl Sun compiler defines __SUNPRO_C/__SUNPRO_CC
AC_DEFUN([AC_BAKEFILE_PROG_SUNCC],
[
    _AC_BAKEFILE_LANG_COMPILER(Sun, C, __SUNPRO_C, SUNCC=yes)
])

AC_DEFUN([AC_BAKEFILE_PROG_SUNCXX],
[
    _AC_BAKEFILE_LANG_COMPILER(Sun, C++, __SUNPRO_CC, SUNCXX=yes)
])

dnl Intel icc compiler defines __INTEL_COMPILER for both C and C++
AC_DEFUN([AC_BAKEFILE_PROG_INTELCC],
[
    _AC_BAKEFILE_LANG_COMPILER(Intel, C, __INTEL_COMPILER, INTELCC=yes)
])

AC_DEFUN([AC_BAKEFILE_PROG_INTELCXX],
[
    _AC_BAKEFILE_LANG_COMPILER(Intel, C++, __INTEL_COMPILER, INTELCXX=yes)
])

dnl HP-UX aCC: see http://docs.hp.com/en/6162/preprocess.htm#macropredef
AC_DEFUN([AC_BAKEFILE_PROG_HPCC],
[
    _AC_BAKEFILE_LANG_COMPILER(HP, C, __HP_cc, HPCC=yes)
])

AC_DEFUN([AC_BAKEFILE_PROG_HPCXX],
[
    _AC_BAKEFILE_LANG_COMPILER(HP, C++, __HP_aCC, HPCXX=yes)
])

dnl Tru64 cc and cxx
AC_DEFUN([AC_BAKEFILE_PROG_COMPAQCC],
[
    _AC_BAKEFILE_LANG_COMPILER(Compaq, C, __DECC, COMPAQCC=yes)
])

AC_DEFUN([AC_BAKEFILE_PROG_COMPAQCXX],
[
    _AC_BAKEFILE_LANG_COMPILER(Compaq, C++, __DECCXX, COMPAQCXX=yes)
])

dnl ===========================================================================
dnl macros to detect specialty compiler options
dnl ===========================================================================

dnl Figure out if we need to pass -ext o to compiler (MetroWerks)
AC_DEFUN([AC_BAKEFILE_METROWERKS_EXTO],
[AC_CACHE_CHECK([if the _AC_LANG compiler requires -ext o], bakefile_cv_[]_AC_LANG_ABBREV[]_exto,
dnl First create an empty conf test
[AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
dnl Now remove .o and .c.o or .cc.o
rm -f conftest.$ac_objext conftest.$ac_ext.o
dnl Now compile the test
AS_IF([AC_TRY_EVAL(ac_compile)],
dnl If the test succeeded look for conftest.c.o or conftest.cc.o
[for ac_file in `(ls conftest.* 2>/dev/null)`; do
    case $ac_file in
        conftest.$ac_ext.o)
            bakefile_cv_[]_AC_LANG_ABBREV[]_exto="-ext o"
            ;;
        *)
            ;;
    esac
done],
[AC_MSG_FAILURE([cannot figure out if compiler needs -ext o: cannot compile])
]) dnl AS_IF

rm -f conftest.$ac_ext.o conftest.$ac_objext conftest.$ac_ext
]) dnl AC_CACHE_CHECK

if test "x$bakefile_cv_[]_AC_LANG_ABBREV[]_exto" '!=' "x"; then
    if test "[]_AC_LANG_ABBREV[]" = "c"; then
        CFLAGS="$bakefile_cv_[]_AC_LANG_ABBREV[]_exto $CFLAGS"
    fi
    if test "[]_AC_LANG_ABBREV[]" = "cxx"; then
        CXXFLAGS="$bakefile_cv_[]_AC_LANG_ABBREV[]_exto $CXXFLAGS"
    fi
fi
]) dnl AC_DEFUN


dnl ===========================================================================
dnl Macros to do all of the compiler detections as one macro
dnl ===========================================================================

dnl check for different proprietary compilers depending on target platform
dnl _AC_BAKEFILE_PROG_COMPILER(LANG)
AC_DEFUN([_AC_BAKEFILE_PROG_COMPILER],
[
    AC_PROG_$1
    AC_BAKEFILE_PROG_INTEL$1
    dnl if we're using gcc, we can't be using any of incompatible compilers
    if test "x$G$1" != "xyes"; then
        if test "x$1" = "xC"; then
            AC_BAKEFILE_METROWERKS_EXTO
            if test "x$bakefile_cv_c_exto" '!=' "x"; then
                unset ac_cv_prog_cc_g
                _AC_PROG_CC_G
            fi
        fi

        dnl most of these compilers are only used under well-defined OS so
        dnl don't waste time checking for them on other ones
        case `uname -s` in
            AIX*)
                AC_BAKEFILE_PROG_XL$1
                ;;

            Darwin)
                AC_BAKEFILE_PROG_MW$1
                AC_BAKEFILE_PROG_XL$1
                ;;

            IRIX*)
                AC_BAKEFILE_PROG_SGI$1
                ;;

            HP-UX*)
                AC_BAKEFILE_PROG_HP$1
                ;;

            OSF1)
                AC_BAKEFILE_PROG_COMPAQ$1
                ;;

            SunOS)
                AC_BAKEFILE_PROG_SUN$1
                ;;
        esac
    fi
])

AC_DEFUN([AC_BAKEFILE_PROG_CC],
[
    _AC_BAKEFILE_PROG_COMPILER(CC)
])

AC_DEFUN([AC_BAKEFILE_PROG_CXX],
[
    _AC_BAKEFILE_PROG_COMPILER(CXX)
])