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.  When changing this version,
   4 dnl install.texi also needs to be updated.
   5 m4_define([GLIBC_AUTOCONF_VERSION], [2.69])
   6 m4_if(m4_defn([AC_AUTOCONF_VERSION]), GLIBC_AUTOCONF_VERSION, [],
   7       [m4_fatal(m4_flatten(
   8 Exactly version GLIBC_AUTOCONF_VERSION of Autoconf is required but you have
   9 m4_defn([AC_AUTOCONF_VERSION])
  10 ), [63])])dnl
  11 dnl
  12 dnl We define the macro GLIBC_PROVIDES to do an AC_PROVIDE for each macro
  13 dnl which appears in configure.ac before the sysdep configure scripts are run.
  14 dnl Each sysdep configure.ac does GLIBC_PROVIDES first, to avoid any
  15 dnl AC_REQUIREs or AC_BEFOREs duplicating their code.
  16 dnl
  17 define([GLIBC_PROVIDES], [dnl
  18 AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
  19 AC_PROVIDE([AC_CONFIG_SUBDIRS])dnl
  20 AC_PROVIDE([_AS_ECHO_N_PREPARE])dnl
  21 AC_PROVIDE([_AS_ECHO_PREPARE])dnl
  22 AC_PROVIDE([_AS_CR_PREPARE])dnl
  23 AC_PROVIDE([_AS_TR_SH_PREPARE])dnl
  24 AC_PROVIDE([_AS_VAR_ARITH_PREPARE])dnl
  25 AC_PROVIDE([AC_PROG_INSTALL])dnl
  26 AC_PROVIDE([AC_PROG_CC])dnl
  27 AC_PROVIDE([AC_PROG_CPP])dnl
  28 AC_PROVIDE([_AS_PATH_SEPARATOR_PREPARE])dnl
  29 AC_PROVIDE([_AS_TEST_PREPARE])dnl
  30 AC_PROVIDE([_AS_BASENAME_PREPARE])dnl
  31 AC_PROVIDE([_AS_ME_PREPARE])dnl
  32 AC_PROVIDE([_AS_LINENO_PREPARE])dnl
  33 AC_PROVIDE([AS_SHELL_FN_as_fn_set_status])dnl
  34 AC_PROVIDE([AS_SHELL_FN_as_fn_exit])dnl
  35 AC_PROVIDE([AS_SHELL_FN_as_fn_arith])dnl
  36 AC_PROVIDE([AS_SHELL_FN_ac_fn_c_try_compile])dnl
  37 AC_PROVIDE([AS_SHELL_FN_ac_fn_c_try_cpp])dnl
  38 define([AS_MESSAGE_LOG_FD],5)dnl
  39 define([AS_MESSAGE_FD],6)dnl
  40 dnl Ripped out of AS_INIT, which does more cruft we do not want.
  41 m4_wrap([m4_divert_pop([BODY])[]])
  42 m4_divert_push([BODY])[]dnl
  43 dnl End of ripped out of AS_INIT.
  44 # This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
  45 define([_AC_LANG], [C])dnl
  46 ])dnl
  47 dnl
  48 dnl Check for a symbol
  49 dnl
  50 AC_DEFUN([AC_CHECK_SYMBOL], [dnl
  51 AC_MSG_CHECKING(for $1)
  52 AC_CACHE_VAL(ac_cv_check_symbol_$1, [dnl
  53 AC_TRY_LINK(,
  54 changequote(,)dnl
  55 extern char *$1[]; puts(*$1);,
  56 changequote([,])dnl
  57             ac_cv_check_symbol_$1=yes, ac_cv_check_symbol_$1=no)])
  58 if test "$ac_cv_check_symbol_$1" = yes; then
  59 changequote(,)dnl
  60   ac_tr_symbol=`echo $1 | tr '[a-z]' '[A-Z]'`
  61 changequote([,])dnl
  62   AC_DEFINE_UNQUOTED(HAVE_${ac_tr_symbol})
  63 fi
  64 AC_MSG_RESULT($ac_cv_check_symbol_$1)])dnl
  65 dnl
  66
  67 dnl Locate a program and check that its version is acceptable.
  68 dnl AC_PROG_CHECK_VER(var, namelist, version-switch,
  69 dnl                   [version-extract-regexp], version-glob [, do-if-fail])
  70 AC_DEFUN([AC_CHECK_PROG_VER],
  71 [AC_CHECK_PROGS([$1], [$2])
  72 if test -z "[$]$1"; then
  73   ac_verc_fail=yes
  74 else
  75   # Found it, now check the version.
  76   AC_MSG_CHECKING([version of [$]$1])
  77 changequote(<<,>>)dnl
  78   ac_prog_version=`<<$>>$1 $3 2>&1 ifelse(<<$4>>,,,
  79                    <<| sed -n 's/^.*patsubst(<<$4>>,/,\/).*$/\1/p'>>)`
  80   case $ac_prog_version in
  81     '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
  82     <<$5>>)
  83 changequote([,])dnl
  84        ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
  85     *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
  86
  87   esac
  88   AC_MSG_RESULT([$ac_prog_version])
  89 fi
  90 ifelse([$6],,,
  91 [if test $ac_verc_fail = yes; then
  92   $6
  93 fi])
  94 ])
  95
  96 dnl These modifications are to allow for an empty cross compiler tree.
  97 define([_AC_COMPILER_EXEEXT], [EXEEXT=
  98 ])
  99
 100 AC_DEFUN([LIBC_PROG_FOO_GNU],
 101 [# Most GNU programs take a -v and spit out some text including
 102 # the word 'GNU'.  Some try to read stdin, so give them /dev/null.
 103 if $1 -o conftest -v </dev/null 2>&1 | grep GNU > /dev/null 2>&1; then
 104   $2
 105 else
 106   $3
 107 fi
 108 rm -fr contest*])
 109
 110 AC_DEFUN([LIBC_PROG_BINUTILS],
 111 [# Was a --with-binutils option given?
 112 if test -n "$path_binutils"; then
 113     # Make absolute; ensure a single trailing slash.
 114     path_binutils=`(cd $path_binutils; pwd) | sed 's%/*$%/%'`
 115     CC="$CC -B$path_binutils"
 116 fi
 117 case "$CC" in
 118     *fuse-ld=lld*) LDNAME=ld.lld;;
 119     *)             LDNAME=ld;;
 120 esac
 121 AS=`$CC -print-prog-name=as`
 122 LD=`$CC -print-prog-name=$LDNAME`
 123 AR=`$CC -print-prog-name=ar`
 124 AC_SUBST(AR)
 125 OBJDUMP=`$CC -print-prog-name=objdump`
 126 AC_SUBST(OBJDUMP)
 127 OBJCOPY=`$CC -print-prog-name=objcopy`
 128 AC_SUBST(OBJCOPY)
 129 GPROF=`$CC -print-prog-name=gprof`
 130 AC_SUBST(GPROF)
 131
 132 # Determine whether we are using GNU binutils.
 133 AC_CACHE_CHECK(whether $AS is GNU as, libc_cv_prog_as_gnu,
 134 [LIBC_PROG_FOO_GNU($AS, libc_cv_prog_as_gnu=yes, libc_cv_prog_as_gnu=no)])
 135 rm -f a.out
 136 gnu_as=$libc_cv_prog_as_gnu
 137
 138 AC_CACHE_CHECK(whether $LD is GNU ld, libc_cv_prog_ld_gnu,
 139 [LIBC_PROG_FOO_GNU($LD, libc_cv_prog_ld_gnu=yes, libc_cv_prog_ld_gnu=no)])
 140 gnu_ld=$libc_cv_prog_ld_gnu
 141 ])
 142
 143 dnl Run a static link test with -nostdlib -nostartfiles.
 144 dnl LIBC_TRY_LINK_STATIC([code], [action-if-true], [action-if-false])
 145 AC_DEFUN([LIBC_TRY_LINK_STATIC],
 146 [cat > conftest.c <<EOF
 147 int _start (void) { return 0; }
 148 int __start (void) { return 0; }
 149 $1
 150 EOF
 151 AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -o conftest
 152                        conftest.c -static -nostartfiles -nostdlib
 153                        1>&AS_MESSAGE_LOG_FD])],
 154       [$2], [$3])
 155 rm -f conftest*])
 156
 157 dnl Test a compiler option or options with an empty input file.
 158 dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
 159 AC_DEFUN([LIBC_TRY_CC_OPTION],
 160 [AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
 161         [$2], [$3])])
 162
 163 dnl Find and source sysdeps/*/preconfigure.
 164 dnl LIBC_PRECONFIGURE([$srcdir], [for])
 165 AC_DEFUN([LIBC_PRECONFIGURE], [dnl
 166 if frags=`ls -d $1/sysdeps/*/preconfigure 2> /dev/null`
 167 then
 168   AC_MSG_CHECKING($2 preconfigure fragments)
 169   for frag in $frags; do
 170     name=`echo "$frag" | sed 's@/[[^/]]*[$]@@;s@^.*/@@'`
 171     echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
 172     . "$frag"
 173   done
 174   AC_MSG_RESULT()
 175 fi])
 176
 177 # These two macros are taken from GCC's config/acx.m4.
 178 dnl Support the --with-pkgversion configure option.
 179 dnl ACX_PKGVERSION(default-pkgversion)
 180 AC_DEFUN([ACX_PKGVERSION],[
 181   AC_ARG_WITH(pkgversion,
 182     AS_HELP_STRING([--with-pkgversion=PKG],
 183                    [Use PKG in the version string in place of "$1"]),
 184     [case "$withval" in
 185       yes) AC_MSG_ERROR([package version not specified]) ;;
 186       no)  PKGVERSION= ;;
 187       *)   PKGVERSION="($withval) " ;;
 188      esac],
 189     PKGVERSION="($1) "
 190   )
 191   PKGVERSION_TEXI=`echo "$PKGVERSION" | sed 's/@/@@/g'`
 192   AC_SUBST(PKGVERSION)
 193   AC_SUBST(PKGVERSION_TEXI)
 194 ])
 195
 196 dnl Support the --with-bugurl configure option.
 197 dnl ACX_BUGURL(default-bugurl)
 198 AC_DEFUN([ACX_BUGURL],[
 199   AC_ARG_WITH(bugurl,
 200     AS_HELP_STRING([--with-bugurl=URL],
 201                    [Direct users to URL to report a bug]),
 202     [case "$withval" in
 203       yes) AC_MSG_ERROR([bug URL not specified]) ;;
 204       no)  BUGURL=
 205            ;;
 206       *)   BUGURL="$withval"
 207            ;;
 208      esac],
 209      BUGURL="$1"
 210   )
 211   case ${BUGURL} in
 212   "")
 213     REPORT_BUGS_TO=
 214     REPORT_BUGS_TEXI=
 215     ;;
 216   *)
 217     REPORT_BUGS_TO="<$BUGURL>"
 218     REPORT_BUGS_TEXI=@uref{`echo "$BUGURL" | sed 's/@/@@/g'`}
 219     ;;
 220   esac;
 221   AC_SUBST(REPORT_BUGS_TO)
 222   AC_SUBST(REPORT_BUGS_TEXI)
 223 ])
 224
 225 dnl Check linker option support.
 226 dnl LIBC_LINKER_FEATURE([ld_option], [cc_option], [action-if-true], [action-if-false])
 227 AC_DEFUN([LIBC_LINKER_FEATURE],
 228 [AC_MSG_CHECKING([for linker that supports $1])
 229 libc_linker_feature=no
 230 if test x"$gnu_ld" = x"yes"; then
 231   cat > conftest.c <<EOF
 232 int _start (void) { return 42; }
 233 EOF
 234   if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
 235                     $2 -nostdlib -nostartfiles
 236                     -fPIC -shared -o conftest.so conftest.c
 237                     1>&AS_MESSAGE_LOG_FD])
 238   then
 239     if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp $2 -nostdlib \
 240         -nostartfiles -fPIC -shared -o conftest.so conftest.c 2>&1 \
 241         | grep "warning: $1 ignored" > /dev/null 2>&1; then
 242       true
 243     else
 244       libc_linker_feature=yes
 245     fi
 246   fi
 247   rm -f conftest*
 248 fi
 249 if test $libc_linker_feature = yes; then
 250   $3
 251 else
 252   $4
 253 fi
 254 AC_MSG_RESULT($libc_linker_feature)])
 255
 256 dnl Add a makefile variable, with value set from a shell string
 257 dnl (expanded by the shell inside double quotes), to config.make.
 258 dnl LIBC_CONFIG_VAR(make-variable, shell-value)
 259 AC_DEFUN([LIBC_CONFIG_VAR],
 260 [config_vars="$config_vars
 261 $1 = $2"])
 262
 263 dnl Check that function FUNC was inlined as a builtin.  The code fragment
 264 dnl CODE is compiled with additional options CC_OPTION.  If FUNC is
 265 dnl not found in the assembly then it is assumed the compiler has support
 266 dnl for this builtin and has inlined the call.  If the compiler has the
 267 dnl feature then ACTION-IF-TRUE is called, otherwise ACTION-IF-FALSE.
 268 dnl It is up to the caller to provide a CC_OPTION that ensures the
 269 dnl builtin is inlined if present.
 270 dnl Warning: This may not work for some machines. For example on ARM the
 271 dnl ABI dictates that some functions should not be inlined and instead
 272 dnl should be provided by a compiler helper library e.g. __aeabi_memcpy.
 273 dnl This is done to reduce code size.
 274 dnl LIBC_COMPILER_BUILTIN([func], [code], [cc_option], [action-if-true], [action-if-false])
 275 AC_DEFUN([LIBC_COMPILER_BUILTIN_INLINED],
 276 [AC_MSG_CHECKING([for compiler support of inlined builtin function $1])
 277 libc_compiler_builtin_inlined=no
 278 cat > conftest.c <<EOF
 279 int _start (void) { $2 return 0; }
 280 EOF
 281 if ! AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
 282                      $3 -nostdlib -nostartfiles
 283                      -S conftest.c -o - | grep -F "$1"
 284                      1>&AS_MESSAGE_LOG_FD])
 285 then
 286   libc_compiler_builtin_inlined=yes
 287 fi
 288 rm -f conftest*
 289 if test $libc_compiler_builtin_inlined = yes; then
 290   $4
 291 else
 292   $5
 293 fi
 294 AC_MSG_RESULT($libc_compiler_builtin_inlined)])
 295
 296 dnl Default to slibdir named SLIBDIR instead of "lib", and rtlddir
 297 dnl named RTLDDIR instead of "lib".  This is used to put 64-bit
 298 dnl libraries in /lib64.
 299 dnl LIBC_SLIBDIR_RTLDDIR([slibdir], [rtlddir])
 300 AC_DEFUN([LIBC_SLIBDIR_RTLDDIR],
 301 [test -n "$libc_cv_slibdir" ||
 302 case "$prefix" in
 303 /usr | /usr/)
 304   libc_cv_slibdir='/$1'
 305   libc_cv_rtlddir='/$2'
 306   if test "$libdir" = '${exec_prefix}/lib'; then
 307     libdir='${exec_prefix}/$1';
 308     # Locale data can be shared between 32-bit and 64-bit libraries.
 309     libc_cv_complocaledir='${exec_prefix}/lib/locale'
 310   fi
 311   ;;
 312 esac])