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 define([AS_MESSAGE_LOG_FD],5)dnl
38 define([AS_MESSAGE_FD],6)dnl
39 dnl Ripped out of AS_INIT, which does more cruft we do not want.
40 m4_wrap([m4_divert_pop([BODY])[]])
41 m4_divert_push([BODY])[]dnl
42 dnl End of ripped out of AS_INIT.
43 # This file is generated from configure.ac by Autoconf. DO NOT EDIT!
44 define([_AC_LANG], [C])dnl
47 dnl Check for a symbol
49 AC_DEFUN([AC_CHECK_SYMBOL], [dnl
50 AC_MSG_CHECKING(for $1)
51 AC_CACHE_VAL(ac_cv_check_symbol_$1, [dnl
54 extern char *$1[]; puts(*$1);,
56 ac_cv_check_symbol_$1=yes, ac_cv_check_symbol_$1=no)])
57 if test "$ac_cv_check_symbol_$1" = yes; then
59 ac_tr_symbol=`echo $1 | tr '[a-z]' '[A-Z]'`
61 AC_DEFINE_UNQUOTED(HAVE_${ac_tr_symbol})
63 AC_MSG_RESULT($ac_cv_check_symbol_$1)])dnl
66 dnl Locate a program and check that its version is acceptable.
67 dnl AC_PROG_CHECK_VER(var, namelist, version-switch,
68 dnl [version-extract-regexp], version-glob [, do-if-fail])
69 AC_DEFUN([AC_CHECK_PROG_VER],
70 [AC_CHECK_PROGS([$1], [$2])
71 if test -z "[$]$1"; then
74 # Found it, now check the version.
75 AC_MSG_CHECKING([version of [$]$1])
77 ac_prog_version=`<<$>>$1 $3 2>&1 ifelse(<<$4>>,,,
78 <<| sed -n 's/^.*patsubst(<<$4>>,/,\/).*$/\1/p'>>)`
79 case $ac_prog_version in
80 '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
83 ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
84 *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
87 AC_MSG_RESULT([$ac_prog_version])
90 [if test $ac_verc_fail = yes; then
95 dnl These modifications are to allow for an empty cross compiler tree.
96 define([_AC_COMPILER_EXEEXT], [EXEEXT=
99 AC_DEFUN([LIBC_PROG_FOO_GNU],
100 [# Most GNU programs take a -v and spit out some text including
101 # the word 'GNU'. Some try to read stdin, so give them /dev/null.
102 if $1 -o conftest -v </dev/null 2>&1 | grep GNU > /dev/null 2>&1; then
109 AC_DEFUN([LIBC_PROG_BINUTILS],
110 [# Was a --with-binutils option given?
111 if test -n "$path_binutils"; then
112 # Make absolute; ensure a single trailing slash.
113 path_binutils=`(cd $path_binutils; pwd) | sed 's%/*$%/%'`
114 CC="$CC -B$path_binutils"
116 AS=`$CC -print-prog-name=as`
117 LD=`$CC -print-prog-name=ld`
118 AR=`$CC -print-prog-name=ar`
120 OBJDUMP=`$CC -print-prog-name=objdump`
122 OBJCOPY=`$CC -print-prog-name=objcopy`
124 GPROF=`$CC -print-prog-name=gprof`
127 # Determine whether we are using GNU binutils.
128 AC_CACHE_CHECK(whether $AS is GNU as, libc_cv_prog_as_gnu,
129 [LIBC_PROG_FOO_GNU($AS, libc_cv_prog_as_gnu=yes, libc_cv_prog_as_gnu=no)])
131 gnu_as=$libc_cv_prog_as_gnu
133 AC_CACHE_CHECK(whether $LD is GNU ld, libc_cv_prog_ld_gnu,
134 [LIBC_PROG_FOO_GNU($LD, libc_cv_prog_ld_gnu=yes, libc_cv_prog_ld_gnu=no)])
135 gnu_ld=$libc_cv_prog_ld_gnu
138 dnl Run a static link test with -nostdlib -nostartfiles.
139 dnl LIBC_TRY_LINK_STATIC([code], [action-if-true], [action-if-false])
140 AC_DEFUN([LIBC_TRY_LINK_STATIC],
141 [cat > conftest.c <<EOF
142 int _start (void) { return 0; }
143 int __start (void) { return 0; }
146 AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -o conftest
147 conftest.c -static -nostartfiles -nostdlib
148 1>&AS_MESSAGE_LOG_FD])],
152 dnl Test a compiler option or options with an empty input file.
153 dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
154 AC_DEFUN([LIBC_TRY_CC_OPTION],
155 [AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
158 dnl Find and source sysdeps/*/preconfigure.
159 dnl LIBC_PRECONFIGURE([$srcdir], [for])
160 AC_DEFUN([LIBC_PRECONFIGURE], [dnl
161 if frags=`ls -d $1/sysdeps/*/preconfigure 2> /dev/null`
163 AC_MSG_CHECKING($2 preconfigure fragments)
164 for frag in $frags; do
165 name=`echo "$frag" | sed 's@/[[^/]]*[$]@@;s@^.*/@@'`
166 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
172 # These two macros are taken from GCC's config/acx.m4.
173 dnl Support the --with-pkgversion configure option.
174 dnl ACX_PKGVERSION(default-pkgversion)
175 AC_DEFUN([ACX_PKGVERSION],[
176 AC_ARG_WITH(pkgversion,
177 AS_HELP_STRING([--with-pkgversion=PKG],
178 [Use PKG in the version string in place of "$1"]),
180 yes) AC_MSG_ERROR([package version not specified]) ;;
182 *) PKGVERSION="($withval) " ;;
186 PKGVERSION_TEXI=`echo "$PKGVERSION" | sed 's/@/@@/g'`
188 AC_SUBST(PKGVERSION_TEXI)
191 dnl Support the --with-bugurl configure option.
192 dnl ACX_BUGURL(default-bugurl)
193 AC_DEFUN([ACX_BUGURL],[
195 AS_HELP_STRING([--with-bugurl=URL],
196 [Direct users to URL to report a bug]),
198 yes) AC_MSG_ERROR([bug URL not specified]) ;;
212 REPORT_BUGS_TO="<$BUGURL>"
213 REPORT_BUGS_TEXI=@uref{`echo "$BUGURL" | sed 's/@/@@/g'`}
216 AC_SUBST(REPORT_BUGS_TO)
217 AC_SUBST(REPORT_BUGS_TEXI)
220 dnl Check linker option support.
221 dnl LIBC_LINKER_FEATURE([ld_option], [cc_option], [action-if-true], [action-if-false])
222 AC_DEFUN([LIBC_LINKER_FEATURE],
223 [AC_MSG_CHECKING([for linker that supports $1])
224 libc_linker_feature=no
225 if test x"$gnu_ld" = x"yes"; then
226 libc_linker_check=`$LD -v --help 2>/dev/null | grep "\$1"`
227 if test -n "$libc_linker_check"; then
228 cat > conftest.c <<EOF
229 int _start (void) { return 42; }
231 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
232 $2 -nostdlib -nostartfiles
233 -fPIC -shared -o conftest.so conftest.c
234 1>&AS_MESSAGE_LOG_FD])
236 libc_linker_feature=yes
241 if test $libc_linker_feature = yes; then
246 AC_MSG_RESULT($libc_linker_feature)])
248 dnl Add a makefile variable, with value set from a shell string
249 dnl (expanded by the shell inside double quotes), to config.make.
250 dnl LIBC_CONFIG_VAR(make-variable, shell-value)
251 AC_DEFUN([LIBC_CONFIG_VAR],
252 [config_vars="$config_vars
255 dnl Check that function FUNC was inlined as a builtin. The code fragment
256 dnl CODE is compiled with additional options CC_OPTION. If FUNC is
257 dnl not found in the assembly then it is assumed the compiler has support
258 dnl for this builtin and has inlined the call. If the compiler has the
259 dnl feature then ACTION-IF-TRUE is called, otherwise ACTION-IF-FALSE.
260 dnl It is up to the caller to provide a CC_OPTION that ensures the
261 dnl builtin is inlined if present.
262 dnl Warning: This may not work for some machines. For example on ARM the
263 dnl ABI dictates that some functions should not be inlined and instead
264 dnl should be provided by a compiler helper library e.g. __aeabi_memcpy.
265 dnl This is done to reduce code size.
266 dnl LIBC_COMPILER_BUILTIN([func], [code], [cc_option], [action-if-true], [action-if-false])
267 AC_DEFUN([LIBC_COMPILER_BUILTIN_INLINED],
268 [AC_MSG_CHECKING([for compiler support of inlined builtin function $1])
269 libc_compiler_builtin_inlined=no
270 cat > conftest.c <<EOF
271 int _start (void) { $2 return 0; }
273 if ! AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
274 $3 -nostdlib -nostartfiles
275 -S conftest.c -o - | fgrep "$1"
276 1>&AS_MESSAGE_LOG_FD])
278 libc_compiler_builtin_inlined=yes
281 if test $libc_compiler_builtin_inlined = yes; then
286 AC_MSG_RESULT($libc_compiler_builtin_inlined)])
288 dnl Default to slibdir named SLIBDIR instead of "lib", and rtlddir
289 dnl named RTLDDIR instead of "lib". This is used to put 64-bit
290 dnl libraries in /lib64.
291 dnl LIBC_SLIBDIR_RTLDDIR([slibdir], [rtlddir])
292 AC_DEFUN([LIBC_SLIBDIR_RTLDDIR],
293 [test -n "$libc_cv_slibdir" ||
298 if test "$libdir" = '${exec_prefix}/lib'; then
299 libdir='${exec_prefix}/$1';
300 # Locale data can be shared between 32-bit and 64-bit libraries.
301 libc_cv_complocaledir='${exec_prefix}/lib/locale'