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  • Committer: William Jon McCann
  • Author(s): William Jon McCann
  • Date: 2007-12-14 05:06:55 UTC
  • Revision ID: git-v1:b7f5d9895c19338f10b0bdd494b221b13b540d9d
Initial checkin. Previously lived in gdm module.

2007-12-14  William Jon McCann  <mccann@jhu.edu>

        * configure.ac, etc: Initial checkin.  Previously
        lived in gdm module.


svn path=/trunk/; revision=2

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acinclude.m4
 
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dnl as-ac-expand.m4 0.2.0
 
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dnl autostars m4 macro for expanding directories using configure's prefix
 
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dnl thomas@apestaart.org
 
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dnl AS_AC_EXPAND(VAR, CONFIGURE_VAR)
 
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dnl example
 
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dnl AS_AC_EXPAND(SYSCONFDIR, $sysconfdir)
 
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dnl will set SYSCONFDIR to /usr/local/etc if prefix=/usr/local
 
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AC_DEFUN([AS_AC_EXPAND],
 
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[
 
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  EXP_VAR=[$1]
 
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  FROM_VAR=[$2]
 
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  dnl first expand prefix and exec_prefix if necessary
 
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  prefix_save=$prefix
 
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  exec_prefix_save=$exec_prefix
 
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  dnl if no prefix given, then use /usr/local, the default prefix
 
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  if test "x$prefix" = "xNONE"; then
 
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    prefix="$ac_default_prefix"
 
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  fi
 
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  dnl if no exec_prefix given, then use prefix
 
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  if test "x$exec_prefix" = "xNONE"; then
 
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    exec_prefix=$prefix
 
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  fi
 
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  full_var="$FROM_VAR"
 
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  dnl loop until it doesn't change anymore
 
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  while true; do
 
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    new_full_var="`eval echo $full_var`"
 
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    if test "x$new_full_var" = "x$full_var"; then break; fi
 
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    full_var=$new_full_var
 
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  done
 
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  dnl clean up
 
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  full_var=$new_full_var
 
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  AC_SUBST([$1], "$full_var")
 
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  dnl restore prefix and exec_prefix
 
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  prefix=$prefix_save
 
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  exec_prefix=$exec_prefix_save
 
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])
 
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dnl EXTRA_COMPILE_WARNINGS
 
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dnl Turn on many useful compiler warnings
 
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dnl For now, only works on GCC
 
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AC_DEFUN([EXTRA_COMPILE_WARNINGS],[
 
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    dnl ******************************
 
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    dnl More compiler warnings
 
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    dnl ******************************
 
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    AC_ARG_ENABLE(compile-warnings,
 
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                  AC_HELP_STRING([--enable-compile-warnings=@<:@no/minimum/yes/maximum/error@:>@],
 
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                                 [Turn on compiler warnings]),,
 
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                  [enable_compile_warnings="m4_default([$1],[yes])"])
 
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    warnCFLAGS=
 
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    if test "x$GCC" != xyes; then
 
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        enable_compile_warnings=no
 
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    fi
 
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    warning_flags=
 
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    realsave_CFLAGS="$CFLAGS"
 
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    case "$enable_compile_warnings" in
 
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    no)
 
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        warning_flags=
 
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        ;;
 
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    minimum)
 
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        warning_flags="-Wall"
 
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        ;;
 
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    yes)
 
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        warning_flags="-Wall -Wmissing-prototypes"
 
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        ;;
 
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    maximum|error)
 
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        warning_flags="-Wall -Wmissing-prototypes -Wnested-externs -Wpointer-arith"
 
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        CFLAGS="$warning_flags $CFLAGS"
 
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        for option in -Wno-sign-compare; do
 
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                SAVE_CFLAGS="$CFLAGS"
 
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                CFLAGS="$CFLAGS $option"
 
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                AC_MSG_CHECKING([whether gcc understands $option])
 
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                AC_TRY_COMPILE([], [],
 
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                        has_option=yes,
 
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                        has_option=no,)
 
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                CFLAGS="$SAVE_CFLAGS"
 
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                AC_MSG_RESULT($has_option)
 
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                if test $has_option = yes; then
 
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                  warning_flags="$warning_flags $option"
 
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                fi
 
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                unset has_option
 
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                unset SAVE_CFLAGS
 
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        done
 
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        unset option
 
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        if test "$enable_compile_warnings" = "error" ; then
 
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            warning_flags="$warning_flags -Werror"
 
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        fi
 
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        ;;
 
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    *)
 
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        AC_MSG_ERROR(Unknown argument '$enable_compile_warnings' to --enable-compile-warnings)
 
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        ;;
 
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    esac
 
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    CFLAGS="$realsave_CFLAGS"
 
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    AC_MSG_CHECKING(what warning flags to pass to the C compiler)
 
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    AC_MSG_RESULT($warning_flags)
 
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    AC_ARG_ENABLE(iso-c,
 
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                  AC_HELP_STRING([--enable-iso-c],
 
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                                 [Try to warn if code is not ISO C ]),,
 
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                  [enable_iso_c=no])
 
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    AC_MSG_CHECKING(what language compliance flags to pass to the C compiler)
 
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    complCFLAGS=
 
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    if test "x$enable_iso_c" != "xno"; then
 
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        if test "x$GCC" = "xyes"; then
 
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        case " $CFLAGS " in
 
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            *[\ \       ]-ansi[\ \      ]*) ;;
 
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            *) complCFLAGS="$complCFLAGS -ansi" ;;
 
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        esac
 
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        case " $CFLAGS " in
 
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            *[\ \       ]-pedantic[\ \  ]*) ;;
 
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            *) complCFLAGS="$complCFLAGS -pedantic" ;;
 
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        esac
 
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        fi
 
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    fi
 
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    AC_MSG_RESULT($complCFLAGS)
 
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    WARN_CFLAGS="$warning_flags $complCFLAGS"
 
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    AC_SUBST(WARN_CFLAGS)
 
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])