aclocal.m4

   1 dnl We require that everyone use exactly the same Autoconf version so that
   2 dnl the internal functions defined and used by the main configure script
   3 dnl match those expected by the fragments.
   4 m4_define([GLIBC_AUTOCONF_VERSION], [2.68])
   5 m4_if(m4_defn([AC_AUTOCONF_VERSION]), GLIBC_AUTOCONF_VERSION, [],
   6       [m4_fatal(m4_flatten(
   7 Exactly version GLIBC_AUTOCONF_VERSION of Autoconf is required but you have
   8 m4_defn([AC_AUTOCONF_VERSION])
   9 ), [63])])dnl
  10 dnl
  11 dnl We define the macro GLIBC_PROVIDES to do an AC_PROVIDE for each macro
  12 dnl which appears in configure.in before the sysdep configure scripts are run.
  13 dnl Each sysdep configure.in does GLIBC_PROVIDES first, to avoid any
  14 dnl AC_REQUIREs or AC_BEFOREs duplicating their code.
  15 dnl
  16 define([GLIBC_PROVIDES], [dnl
  17 AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
  18 AC_PROVIDE([AC_CONFIG_SUBDIRS])dnl
  19 AC_PROVIDE([_AS_ECHO_N_PREPARE])dnl
  20 AC_PROVIDE([_AS_ECHO_PREPARE])dnl
  21 AC_PROVIDE([_AS_CR_PREPARE])dnl
  22 AC_PROVIDE([_AS_TR_SH_PREPARE])dnl
  23 AC_PROVIDE([_AS_VAR_ARITH_PREPARE])dnl
  24 AC_PROVIDE([AC_PROG_INSTALL])dnl
  25 AC_PROVIDE([AC_PROG_CC])dnl
  26 AC_PROVIDE([AC_PROG_CPP])dnl
  27 AC_PROVIDE([_AS_PATH_SEPARATOR_PREPARE])dnl
  28 AC_PROVIDE([_AS_TEST_PREPARE])dnl
  29 AC_PROVIDE([_AS_BASENAME_PREPARE])dnl
  30 AC_PROVIDE([_AS_ME_PREPARE])dnl
  31 AC_PROVIDE([_AS_LINENO_PREPARE])dnl
  32 AC_PROVIDE([AS_SHELL_FN_as_fn_set_status])dnl
  33 AC_PROVIDE([AS_SHELL_FN_as_fn_exit])dnl
  34 AC_PROVIDE([AS_SHELL_FN_as_fn_arith])dnl
  35 AC_PROVIDE([AS_SHELL_FN_ac_fn_c_try_compile])dnl
  36 define([AS_MESSAGE_LOG_FD],5)dnl
  37 define([AS_MESSAGE_FD],6)dnl
  38 dnl Ripped out of AS_INIT, which does more cruft we do not want.
  39 m4_wrap([m4_divert_pop([BODY])[]])
  40 m4_divert_push([BODY])[]dnl
  41 dnl End of ripped out of AS_INIT.
  42 # This file is generated from configure.in by Autoconf.  DO NOT EDIT!
  43 define([_AC_LANG], [C])dnl
  44 ])dnl
  45 dnl
  46 dnl Check for a symbol
  47 dnl
  48 AC_DEFUN([AC_CHECK_SYMBOL], [dnl
  49 AC_MSG_CHECKING(for $1)
  50 AC_CACHE_VAL(ac_cv_check_symbol_$1, [dnl
  51 AC_TRY_LINK(,
  52 changequote(,)dnl
  53 extern char *$1[]; puts(*$1);,
  54 changequote([,])dnl
  55             ac_cv_check_symbol_$1=yes, ac_cv_check_symbol_$1=no)])
  56 if test "$ac_cv_check_symbol_$1" = yes; then
  57 changequote(,)dnl
  58   ac_tr_symbol=`echo $1 | tr '[a-z]' '[A-Z]'`
  59 changequote([,])dnl
  60   AC_DEFINE_UNQUOTED(HAVE_${ac_tr_symbol})
  61 fi
  62 AC_MSG_RESULT($ac_cv_check_symbol_$1)])dnl
  63 dnl
  64
  65 dnl Locate a program and check that its version is acceptable.
  66 dnl AC_PROG_CHECK_VER(var, namelist, version-switch,
  67 dnl                   [version-extract-regexp], version-glob [, do-if-fail])
  68 AC_DEFUN([AC_CHECK_PROG_VER],
  69 [AC_CHECK_PROGS([$1], [$2])
  70 if test -z "[$]$1"; then
  71   ac_verc_fail=yes
  72 else
  73   # Found it, now check the version.
  74   AC_MSG_CHECKING([version of [$]$1])
  75 changequote(<<,>>)dnl
  76   ac_prog_version=`<<$>>$1 $3 2>&1 ifelse(<<$4>>,,,
  77                    <<| sed -n 's/^.*patsubst(<<$4>>,/,\/).*$/\1/p'>>)`
  78   case $ac_prog_version in
  79     '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
  80     <<$5>>)
  81 changequote([,])dnl
  82        ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
  83     *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
  84
  85   esac
  86   AC_MSG_RESULT([$ac_prog_version])
  87 fi
  88 ifelse([$6],,,
  89 [if test $ac_verc_fail = yes; then
  90   $6
  91 fi])
  92 ])
  93
  94 dnl These modifications are to allow for an empty cross compiler tree.
  95 define([_AC_COMPILER_EXEEXT], [EXEEXT=
  96 ])
  97
  98 AC_DEFUN([LIBC_PROG_FOO_GNU],
  99 [# Most GNU programs take a -v and spit out some text including
 100 # the word 'GNU'.  Some try to read stdin, so give them /dev/null.
 101 if $1 -o conftest -v </dev/null 2>&1 | grep GNU > /dev/null 2>&1; then
 102   $2
 103 else
 104   $3
 105 fi
 106 rm -fr contest*])
 107
 108 AC_DEFUN([LIBC_PROG_BINUTILS],
 109 [# Was a --with-binutils option given?
 110 if test -n "$path_binutils"; then
 111     # Make absolute; ensure a single trailing slash.
 112     path_binutils=`(cd $path_binutils; pwd) | sed 's%/*$%/%'`
 113     CC="$CC -B$path_binutils"
 114 fi
 115 AS=`$CC -print-prog-name=as`
 116 LD=`$CC -print-prog-name=ld`
 117 AR=`$CC -print-prog-name=ar`
 118 AC_SUBST(AR)
 119 OBJDUMP=`$CC -print-prog-name=objdump`
 120 AC_SUBST(OBJDUMP)
 121 OBJCOPY=`$CC -print-prog-name=objcopy`
 122 AC_SUBST(OBJCOPY)
 123
 124 # Determine whether we are using GNU binutils.
 125 AC_CACHE_CHECK(whether $AS is GNU as, libc_cv_prog_as_gnu,
 126 [LIBC_PROG_FOO_GNU($AS, libc_cv_prog_as_gnu=yes, libc_cv_prog_as_gnu=no)])
 127 rm -f a.out
 128 gnu_as=$libc_cv_prog_as_gnu
 129
 130 AC_CACHE_CHECK(whether $LD is GNU ld, libc_cv_prog_ld_gnu,
 131 [LIBC_PROG_FOO_GNU($LD, libc_cv_prog_ld_gnu=yes, libc_cv_prog_ld_gnu=no)])
 132 gnu_ld=$libc_cv_prog_ld_gnu
 133 ])
 134
 135 dnl Run a static link test with -nostdlib -nostartfiles.
 136 dnl LIBC_TRY_LINK_STATIC([code], [action-if-true], [action-if-false])
 137 AC_DEFUN([LIBC_TRY_LINK_STATIC],
 138 [cat > conftest.c <<EOF
 139 int _start (void) { return 0; }
 140 int __start (void) { return 0; }
 141 $1
 142 EOF
 143 AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest
 144                        conftest.c -static -nostartfiles -nostdlib
 145                        1>&AS_MESSAGE_LOG_FD])],
 146       [$2], [$3])
 147 rm -f conftest*])
 148
 149 dnl Test a compiler option or options with an empty input file.
 150 dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
 151 AC_DEFUN([LIBC_TRY_CC_OPTION],
 152 [AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
 153         [$2], [$3])])
 154
 155 dnl Find and source sysdeps/*/preconfigure.
 156 dnl LIBC_PRECONFIGURE([$srcdir], [for])
 157 AC_DEFUN([LIBC_PRECONFIGURE], [dnl
 158 if frags=`ls -d $1/sysdeps/*/preconfigure 2> /dev/null`
 159 then
 160   AC_MSG_CHECKING($2 preconfigure fragments)
 161   for frag in $frags; do
 162     name=`echo "$frag" | sed 's@/[[^/]]*[$]@@;s@^.*/@@'`
 163     echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
 164     . "$frag"
 165   done
 166   AC_MSG_RESULT()
 167 fi])
 168
 169 # These two macros are taken from GCC's config/acx.m4.
 170 dnl Support the --with-pkgversion configure option.
 171 dnl ACX_PKGVERSION(default-pkgversion)
 172 AC_DEFUN([ACX_PKGVERSION],[
 173   AC_ARG_WITH(pkgversion,
 174     AS_HELP_STRING([--with-pkgversion=PKG],
 175                    [Use PKG in the version string in place of "$1"]),
 176     [case "$withval" in
 177       yes) AC_MSG_ERROR([package version not specified]) ;;
 178       no)  PKGVERSION= ;;
 179       *)   PKGVERSION="($withval) " ;;
 180      esac],
 181     PKGVERSION="($1) "
 182   )
 183   PKGVERSION_TEXI=`echo "$PKGVERSION" | sed 's/@/@@/g'`
 184   AC_SUBST(PKGVERSION)
 185   AC_SUBST(PKGVERSION_TEXI)
 186 ])
 187
 188 dnl Support the --with-bugurl configure option.
 189 dnl ACX_BUGURL(default-bugurl)
 190 AC_DEFUN([ACX_BUGURL],[
 191   AC_ARG_WITH(bugurl,
 192     AS_HELP_STRING([--with-bugurl=URL],
 193                    [Direct users to URL to report a bug]),
 194     [case "$withval" in
 195       yes) AC_MSG_ERROR([bug URL not specified]) ;;
 196       no)  BUGURL=
 197            ;;
 198       *)   BUGURL="$withval"
 199            ;;
 200      esac],
 201      BUGURL="$1"
 202   )
 203   case ${BUGURL} in
 204   "")
 205     REPORT_BUGS_TO=
 206     REPORT_BUGS_TEXI=
 207     ;;
 208   *)
 209     REPORT_BUGS_TO="<$BUGURL>"
 210     REPORT_BUGS_TEXI=@uref{`echo "$BUGURL" | sed 's/@/@@/g'`}
 211     ;;
 212   esac;
 213   AC_SUBST(REPORT_BUGS_TO)
 214   AC_SUBST(REPORT_BUGS_TEXI)
 215 ])
 216
 217 dnl Check linker option support.
 218 dnl LIBC_LINKER_FEATURE([ld_option], [cc_option], [action-if-true], [action-if-false])
 219 AC_DEFUN([LIBC_LINKER_FEATURE],
 220 [AC_MSG_CHECKING([for linker that supports $1])
 221 libc_linker_feature=no
 222 if test x"$gnu_ld" = x"yes"; then
 223   libc_linker_check=`$LD -v --help 2>/dev/null | grep "\$1"`
 224   if test -n "$libc_linker_check"; then
 225     cat > conftest.c <<EOF
 226 int _start (void) { return 42; }
 227 EOF
 228     if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
 229                                 $2 -nostdlib -nostartfiles
 230                                 -fPIC -shared -o conftest.so conftest.c
 231                                 1>&AS_MESSAGE_LOG_FD])
 232     then
 233       libc_linker_feature=yes
 234     fi
 235     rm -f conftest*
 236   fi
 237 fi
 238 if test $libc_linker_feature = yes; then
 239   $3
 240 else
 241   $4
 242 fi
 243 AC_MSG_RESULT($libc_linker_feature)])