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, [],
8 Exactly version GLIBC_AUTOCONF_VERSION of Autoconf is required but you have
9 m4_defn([AC_AUTOCONF_VERSION])
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.
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
48 dnl Check for a symbol
50 AC_DEFUN([AC_CHECK_SYMBOL], [dnl
51 AC_MSG_CHECKING(for $1)
52 AC_CACHE_VAL(ac_cv_check_symbol_$1, [dnl
55 extern char *$1[]; puts(*$1);,
57 ac_cv_check_symbol_$1=yes, ac_cv_check_symbol_$1=no)])
58 if test "$ac_cv_check_symbol_$1" = yes; then
60 ac_tr_symbol=`echo $1 | tr '[a-z]' '[A-Z]'`
62 AC_DEFINE_UNQUOTED(HAVE_${ac_tr_symbol})
64 AC_MSG_RESULT($ac_cv_check_symbol_$1)])dnl
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], [$2])
72 if test -z "[$]$1"; then
75 # Found it, now check the version.
76 AC_MSG_CHECKING([version of [$]$1])
78 ac_prog_version=`<<$>>$1 $3 2>&1 ifelse(<<$4>>,,,
79 <<| sed -n 's/^.*patsubst(<<$4>>,/,\/).*$/\1/p'>>)`
80 case $ac_prog_version in
81 '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
84 ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
85 *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
88 AC_MSG_RESULT([$ac_prog_version])
91 [if test $ac_verc_fail = yes; then
96 dnl These modifications are to allow for an empty cross compiler tree.
97 define([_AC_COMPILER_EXEEXT], [EXEEXT=
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 $1 -o conftest -v </dev/null 2>&1 | grep GNU > /dev/null 2>&1; then
110 AC_DEFUN([LIBC_PROG_BINUTILS],
111 [# Was a --with-binutils option given?
112 if test -n "$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"
117 AS=`$CC -print-prog-name=as`
118 LD=`$CC -print-prog-name=ld`
119 AR=`$CC -print-prog-name=ar`
121 OBJDUMP=`$CC -print-prog-name=objdump`
123 OBJCOPY=`$CC -print-prog-name=objcopy`
125 GPROF=`$CC -print-prog-name=gprof`
128 # Determine whether we are using GNU binutils.
129 AC_CACHE_CHECK(whether $AS is GNU as, libc_cv_prog_as_gnu,
130 [LIBC_PROG_FOO_GNU($AS, libc_cv_prog_as_gnu=yes, libc_cv_prog_as_gnu=no)])
132 gnu_as=$libc_cv_prog_as_gnu
134 AC_CACHE_CHECK(whether $LD is GNU ld, libc_cv_prog_ld_gnu,
135 [LIBC_PROG_FOO_GNU($LD, libc_cv_prog_ld_gnu=yes, libc_cv_prog_ld_gnu=no)])
136 gnu_ld=$libc_cv_prog_ld_gnu
139 dnl Run a static link test with -nostdlib -nostartfiles.
140 dnl LIBC_TRY_LINK_STATIC([code], [action-if-true], [action-if-false])
141 AC_DEFUN([LIBC_TRY_LINK_STATIC],
142 [cat > conftest.c <<EOF
143 int _start (void) { return 0; }
144 int __start (void) { return 0; }
147 AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -o conftest
148 conftest.c -static -nostartfiles -nostdlib
149 1>&AS_MESSAGE_LOG_FD])],
153 dnl Test a compiler option or options with an empty input file.
154 dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
155 AC_DEFUN([LIBC_TRY_CC_OPTION],
156 [AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
159 dnl Find and source sysdeps/*/preconfigure.
160 dnl LIBC_PRECONFIGURE([$srcdir], [for])
161 AC_DEFUN([LIBC_PRECONFIGURE], [dnl
162 if frags=`ls -d $1/sysdeps/*/preconfigure 2> /dev/null`
164 AC_MSG_CHECKING($2 preconfigure fragments)
165 for frag in $frags; do
166 name=`echo "$frag" | sed 's@/[[^/]]*[$]@@;s@^.*/@@'`
167 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
173 # These two macros are taken from GCC's config/acx.m4.
174 dnl Support the --with-pkgversion configure option.
175 dnl ACX_PKGVERSION(default-pkgversion)
176 AC_DEFUN([ACX_PKGVERSION],[
177 AC_ARG_WITH(pkgversion,
178 AS_HELP_STRING([--with-pkgversion=PKG],
179 [Use PKG in the version string in place of "$1"]),
181 yes) AC_MSG_ERROR([package version not specified]) ;;
183 *) PKGVERSION="($withval) " ;;
187 PKGVERSION_TEXI=`echo "$PKGVERSION" | sed 's/@/@@/g'`
189 AC_SUBST(PKGVERSION_TEXI)
192 dnl Support the --with-bugurl configure option.
193 dnl ACX_BUGURL(default-bugurl)
194 AC_DEFUN([ACX_BUGURL],[
196 AS_HELP_STRING([--with-bugurl=URL],
197 [Direct users to URL to report a bug]),
199 yes) AC_MSG_ERROR([bug URL not specified]) ;;
213 REPORT_BUGS_TO="<$BUGURL>"
214 REPORT_BUGS_TEXI=@uref{`echo "$BUGURL" | sed 's/@/@@/g'`}
217 AC_SUBST(REPORT_BUGS_TO)
218 AC_SUBST(REPORT_BUGS_TEXI)
221 dnl Check linker option support.
222 dnl LIBC_LINKER_FEATURE([ld_option], [cc_option], [action-if-true], [action-if-false])
223 AC_DEFUN([LIBC_LINKER_FEATURE],
224 [AC_MSG_CHECKING([for linker that supports $1])
225 libc_linker_feature=no
226 if test x"$gnu_ld" = x"yes"; then
227 libc_linker_check=`$LD -v --help 2>/dev/null | grep "\$1"`
228 if test -n "$libc_linker_check"; then
229 cat > conftest.c <<EOF
230 int _start (void) { return 42; }
232 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
233 $2 -nostdlib -nostartfiles
234 -fPIC -shared -o conftest.so conftest.c
235 1>&AS_MESSAGE_LOG_FD])
237 libc_linker_feature=yes
242 if test $libc_linker_feature = yes; then
247 AC_MSG_RESULT($libc_linker_feature)])
249 dnl Add a makefile variable, with value set from a shell string
250 dnl (expanded by the shell inside double quotes), to config.make.
251 dnl LIBC_CONFIG_VAR(make-variable, shell-value)
252 AC_DEFUN([LIBC_CONFIG_VAR],
253 [config_vars="$config_vars
256 dnl Check that function FUNC was inlined as a builtin. The code fragment
257 dnl CODE is compiled with additional options CC_OPTION. If FUNC is
258 dnl not found in the assembly then it is assumed the compiler has support
259 dnl for this builtin and has inlined the call. If the compiler has the
260 dnl feature then ACTION-IF-TRUE is called, otherwise ACTION-IF-FALSE.
261 dnl It is up to the caller to provide a CC_OPTION that ensures the
262 dnl builtin is inlined if present.
263 dnl Warning: This may not work for some machines. For example on ARM the
264 dnl ABI dictates that some functions should not be inlined and instead
265 dnl should be provided by a compiler helper library e.g. __aeabi_memcpy.
266 dnl This is done to reduce code size.
267 dnl LIBC_COMPILER_BUILTIN([func], [code], [cc_option], [action-if-true], [action-if-false])
268 AC_DEFUN([LIBC_COMPILER_BUILTIN_INLINED],
269 [AC_MSG_CHECKING([for compiler support of inlined builtin function $1])
270 libc_compiler_builtin_inlined=no
271 cat > conftest.c <<EOF
272 int _start (void) { $2 return 0; }
274 if ! AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
275 $3 -nostdlib -nostartfiles
276 -S conftest.c -o - | fgrep "$1"
277 1>&AS_MESSAGE_LOG_FD])
279 libc_compiler_builtin_inlined=yes
282 if test $libc_compiler_builtin_inlined = yes; then
287 AC_MSG_RESULT($libc_compiler_builtin_inlined)])
289 dnl Default to slibdir named SLIBDIR instead of "lib", and rtlddir
290 dnl named RTLDDIR instead of "lib". This is used to put 64-bit
291 dnl libraries in /lib64.
292 dnl LIBC_SLIBDIR_RTLDDIR([slibdir], [rtlddir])
293 AC_DEFUN([LIBC_SLIBDIR_RTLDDIR],
294 [test -n "$libc_cv_slibdir" ||
297 libc_cv_slibdir='/$1'
298 libc_cv_rtlddir='/$2'
299 if test "$libdir" = '${exec_prefix}/lib'; then
300 libdir='${exec_prefix}/$1';
301 # Locale data can be shared between 32-bit and 64-bit libraries.
302 libc_cv_complocaledir='${exec_prefix}/lib/locale'