glibc/aclocal.m4

dnl We require that everyone use exactly the same Autoconf version so that
dnl the internal functions defined and used by the main configure script
dnl match those expected by the fragments.
m4_define([GLIBC_AUTOCONF_VERSION], [2.68])
m4_if(m4_defn([AC_AUTOCONF_VERSION]), GLIBC_AUTOCONF_VERSION, [],
      [m4_fatal(m4_flatten(
Exactly version GLIBC_AUTOCONF_VERSION of Autoconf is required but you have
m4_defn([AC_AUTOCONF_VERSION])
), [63])])dnl
dnl
dnl We define the macro GLIBC_PROVIDES to do an AC_PROVIDE for each macro
dnl which appears in configure.in before the sysdep configure scripts are run.
dnl Each sysdep configure.in does GLIBC_PROVIDES first, to avoid any
dnl AC_REQUIREs or AC_BEFOREs duplicating their code.
dnl
define([GLIBC_PROVIDES], [dnl
AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
AC_PROVIDE([AC_CONFIG_SUBDIRS])dnl
AC_PROVIDE([_AS_ECHO_N_PREPARE])dnl
AC_PROVIDE([_AS_ECHO_PREPARE])dnl
AC_PROVIDE([_AS_CR_PREPARE])dnl
AC_PROVIDE([_AS_TR_SH_PREPARE])dnl
AC_PROVIDE([_AS_VAR_ARITH_PREPARE])dnl
AC_PROVIDE([AC_PROG_INSTALL])dnl
AC_PROVIDE([AC_PROG_CC])dnl
AC_PROVIDE([AC_PROG_CPP])dnl
AC_PROVIDE([_AS_PATH_SEPARATOR_PREPARE])dnl
AC_PROVIDE([_AS_TEST_PREPARE])dnl
AC_PROVIDE([_AS_BASENAME_PREPARE])dnl
AC_PROVIDE([_AS_ME_PREPARE])dnl
AC_PROVIDE([_AS_LINENO_PREPARE])dnl
AC_PROVIDE([AS_SHELL_FN_as_fn_set_status])dnl
AC_PROVIDE([AS_SHELL_FN_as_fn_exit])dnl
AC_PROVIDE([AS_SHELL_FN_as_fn_arith])dnl
AC_PROVIDE([AS_SHELL_FN_ac_fn_c_try_compile])dnl
define([AS_MESSAGE_LOG_FD],5)dnl
define([AS_MESSAGE_FD],6)dnl
dnl Ripped out of AS_INIT, which does more cruft we do not want.
m4_wrap([m4_divert_pop([BODY])[]])
m4_divert_push([BODY])[]dnl
dnl End of ripped out of AS_INIT.
# This file is generated from configure.in by Autoconf.  DO NOT EDIT!
define([_AC_LANG], [C])dnl
])dnl
dnl
dnl Check for a symbol
dnl
AC_DEFUN([AC_CHECK_SYMBOL], [dnl
AC_MSG_CHECKING(for $1)
AC_CACHE_VAL(ac_cv_check_symbol_$1, [dnl
AC_TRY_LINK(,
changequote(,)dnl
extern char *$1[]; puts(*$1);,
changequote([,])dnl
	    ac_cv_check_symbol_$1=yes, ac_cv_check_symbol_$1=no)])
if test "$ac_cv_check_symbol_$1" = yes; then
changequote(,)dnl
  ac_tr_symbol=`echo $1 | tr '[a-z]' '[A-Z]'`
changequote([,])dnl
  AC_DEFINE_UNQUOTED(HAVE_${ac_tr_symbol})
fi
AC_MSG_RESULT($ac_cv_check_symbol_$1)])dnl
dnl

dnl Locate a program and check that its version is acceptable.
dnl AC_PROG_CHECK_VER(var, namelist, version-switch,
dnl 		      [version-extract-regexp], version-glob [, do-if-fail])
AC_DEFUN([AC_CHECK_PROG_VER],
[AC_CHECK_PROGS([$1], [$2])
if test -z "[$]$1"; then
  ac_verc_fail=yes
else
  # Found it, now check the version.
  AC_MSG_CHECKING([version of [$]$1])
changequote(<<,>>)dnl
  ac_prog_version=`<<$>>$1 $3 2>&1 ifelse(<<$4>>,,,
		   <<| sed -n 's/^.*patsubst(<<$4>>,/,\/).*$/\1/p'>>)`
  case $ac_prog_version in
    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
    <<$5>>)
changequote([,])dnl
       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;

  esac
  AC_MSG_RESULT([$ac_prog_version])
fi
ifelse([$6],,,
[if test $ac_verc_fail = yes; then
  $6
fi])
])

dnl These modifications are to allow for an empty cross compiler tree.
define([_AC_COMPILER_EXEEXT], [EXEEXT=
])

AC_DEFUN([LIBC_PROG_FOO_GNU],
[# Most GNU programs take a -v and spit out some text including
# the word 'GNU'.  Some try to read stdin, so give them /dev/null.
if $1 -o conftest -v </dev/null 2>&1 | grep GNU > /dev/null 2>&1; then
  $2
else
  $3
fi
rm -fr contest*])

AC_DEFUN([LIBC_PROG_BINUTILS],
[# Was a --with-binutils option given?
if test -n "$path_binutils"; then
    # Make absolute; ensure a single trailing slash.
    path_binutils=`(cd $path_binutils; pwd) | sed 's%/*$%/%'`
    CC="$CC -B$path_binutils"
fi
AS=`$CC -print-prog-name=as`
LD=`$CC -print-prog-name=ld`
AR=`$CC -print-prog-name=ar`
AC_SUBST(AR)
OBJDUMP=`$CC -print-prog-name=objdump`
AC_SUBST(OBJDUMP)
OBJCOPY=`$CC -print-prog-name=objcopy`
AC_SUBST(OBJCOPY)

# Determine whether we are using GNU binutils.
AC_CACHE_CHECK(whether $AS is GNU as, libc_cv_prog_as_gnu,
[LIBC_PROG_FOO_GNU($AS, libc_cv_prog_as_gnu=yes, libc_cv_prog_as_gnu=no)])
rm -f a.out
gnu_as=$libc_cv_prog_as_gnu

AC_CACHE_CHECK(whether $LD is GNU ld, libc_cv_prog_ld_gnu,
[LIBC_PROG_FOO_GNU($LD, libc_cv_prog_ld_gnu=yes, libc_cv_prog_ld_gnu=no)])
gnu_ld=$libc_cv_prog_ld_gnu
])

dnl Run a static link test with -nostdlib -nostartfiles.
dnl LIBC_TRY_LINK_STATIC([code], [action-if-true], [action-if-false])
AC_DEFUN([LIBC_TRY_LINK_STATIC],
[cat > conftest.c <<EOF
int _start (void) { return 0; }
int __start (void) { return 0; }
$1
EOF
AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest
		       conftest.c -static -nostartfiles -nostdlib
		       1>&AS_MESSAGE_LOG_FD])],
      [$2], [$3])
rm -f conftest*])

dnl Test a compiler option or options with an empty input file.
dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
AC_DEFUN([LIBC_TRY_CC_OPTION],
[AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
	[$2], [$3])])

dnl Find and source sysdeps/*/preconfigure.
dnl LIBC_PRECONFIGURE([$srcdir], [for])
AC_DEFUN([LIBC_PRECONFIGURE], [dnl
if frags=`ls -d $1/sysdeps/*/preconfigure 2> /dev/null`
then
  AC_MSG_CHECKING($2 preconfigure fragments)
  for frag in $frags; do
    name=`echo "$frag" | sed 's@/[[^/]]*[$]@@;s@^.*/@@'`
    echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
    . "$frag"
  done
  AC_MSG_RESULT()
fi])

# These two macros are taken from GCC's config/acx.m4.
dnl Support the --with-pkgversion configure option.
dnl ACX_PKGVERSION(default-pkgversion)
AC_DEFUN([ACX_PKGVERSION],[
  AC_ARG_WITH(pkgversion,
    AS_HELP_STRING([--with-pkgversion=PKG],
                   [Use PKG in the version string in place of "$1"]),
    [case "$withval" in
      yes) AC_MSG_ERROR([package version not specified]) ;;
      no)  PKGVERSION= ;;
      *)   PKGVERSION="($withval) " ;;
     esac],
    PKGVERSION="($1) "
  )
  PKGVERSION_TEXI=`echo "$PKGVERSION" | sed 's/@/@@/g'`
  AC_SUBST(PKGVERSION)
  AC_SUBST(PKGVERSION_TEXI)
])

dnl Support the --with-bugurl configure option.
dnl ACX_BUGURL(default-bugurl)
AC_DEFUN([ACX_BUGURL],[
  AC_ARG_WITH(bugurl,
    AS_HELP_STRING([--with-bugurl=URL],
                   [Direct users to URL to report a bug]),
    [case "$withval" in
      yes) AC_MSG_ERROR([bug URL not specified]) ;;
      no)  BUGURL=
	   ;;
      *)   BUGURL="$withval"
	   ;;
     esac],
     BUGURL="$1"
  )
  case ${BUGURL} in
  "")
    REPORT_BUGS_TO=
    REPORT_BUGS_TEXI=
    ;;
  *)
    REPORT_BUGS_TO="<$BUGURL>"
    REPORT_BUGS_TEXI=@uref{`echo "$BUGURL" | sed 's/@/@@/g'`}
    ;;
  esac;
  AC_SUBST(REPORT_BUGS_TO)
  AC_SUBST(REPORT_BUGS_TEXI)
])

dnl Check linker option support.
dnl LIBC_LINKER_FEATURE([ld_option], [cc_option], [action-if-true], [action-if-false])
AC_DEFUN([LIBC_LINKER_FEATURE],
[AC_MSG_CHECKING([for linker that supports $1])
libc_linker_feature=no
if test x"$gnu_ld" = x"yes"; then
  libc_linker_check=`$LD -v --help 2>/dev/null | grep "\$1"`
  if test -n "$libc_linker_check"; then
    cat > conftest.c <<EOF
int _start (void) { return 42; }
EOF
    if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
				$2 -nostdlib -nostartfiles
				-fPIC -shared -o conftest.so conftest.c
				1>&AS_MESSAGE_LOG_FD])
    then
      libc_linker_feature=yes
    fi
    rm -f conftest*
  fi
fi
if test $libc_linker_feature = yes; then
  $3
else
  $4
fi
AC_MSG_RESULT($libc_linker_feature)])