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# _GCC_PICFLAG(FLAG, DISPATCH)

# ----------------------------

# Store PIC flag corresponding to DISPATCH triplet in FLAG.

# Explit use of -fpic in CFLAGS corresponding to FLAG overrides default.

AC_DEFUN([_GCC_PICFLAG], [

case "${$2}" in

    # PIC is the default on some targets or must not be used.

    *-*-darwin*)

        # PIC is the default on this platform

        # Common symbols not allowed in MH_DYLIB files

        $1=-fno-common

        ;;

    alpha*-dec-osf5*)

        # PIC is the default.

        ;;

    hppa*64*-*-hpux*)

        # PIC is the default for 64-bit PA HP-UX.

        ;;

    i[[34567]]86-*-cygwin* | i[[34567]]86-*-mingw* | x86_64-*-mingw*)

        ;;

    i[[34567]]86-*-interix[[3-9]]*)

        # Interix 3.x gcc -fpic/-fPIC options generate broken code.

        # Instead, we relocate shared libraries at runtime.

        ;;

    i[[34567]]86-*-nto-qnx*)

        # QNX uses GNU C++, but need to define -shared option too, otherwise

        # it will coredump.

        $1='-fPIC -shared'

        ;;

    i[[34567]]86-pc-msdosdjgpp*)

        # DJGPP does not support shared libraries at all.

        ;;

    ia64*-*-hpux*)

        # On IA64 HP-UX, PIC is the default but the pic flag

        # sets the default TLS model and affects inlining.

        $1=-fPIC

        ;;

    mips-sgi-irix6*)

        # PIC is the default.

        ;;

    rs6000-ibm-aix* | powerpc-ibm-aix*)

        # All AIX code is PIC.

        ;;

    # Some targets support both -fPIC and -fpic, but prefer the latter.

    # FIXME: Why?

    i[[34567]]86-*-* | x86_64-*-*)

        $1=-fpic

        ;;

    m68k-*-*)

        $1=-fpic

        ;;

    # FIXME: Override -fPIC default in libgcc only?

    sh-*-linux* | sh[[2346lbe]]*-*-linux*)

        $1=-fpic

        ;;

    # FIXME: Simplify to sh*-*-netbsd*?

    sh-*-netbsdelf* | shl*-*-netbsdelf* | sh5-*-netbsd* | sh5l*-*-netbsd* | \

      sh64-*-netbsd* | sh64l*-*-netbsd*)

        $1=-fpic

        ;;

    # Default to -fPIC unless specified otherwise.

    *)

        $1=-fPIC

        ;;

esac

# If the user explicitly uses -fpic/-fPIC, keep that.

case "${m4_bpatsubsts($1, PICFLAG, CFLAGS)}" in

    *-fpic*)

        $1=-fpic

        ;;

    *-fPIC*)

        $1=-fPIC

        ;;

esac

])

# GCC_PICFLAG

# -----------

# Store host PIC flag in PICFLAG.

AC_DEFUN([GCC_PICFLAG], [

  AC_REQUIRE([AC_CANONICAL_HOST])

  _GCC_PICFLAG([PICFLAG], [host])])

# GCC_PICFLAG_FOR_TARGET

# ----------------------

# Store target PIC flag in PICFLAG_FOR_TARGET.

AC_DEFUN([GCC_PICFLAG_FOR_TARGET], [

  AC_REQUIRE([AC_CANONICAL_TARGET])

  _GCC_PICFLAG([PICFLAG_FOR_TARGET], [target])])