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"
118 *fuse-ld=lld*) LDNAME=ld.lld;;
121 AS=`$CC -print-prog-name=as`
122 LD=`$CC -print-prog-name=$LDNAME`
123 AR=`$CC -print-prog-name=ar`
125 OBJDUMP=`$CC -print-prog-name=objdump`
127 OBJCOPY=`$CC -print-prog-name=objcopy`
129 GPROF=`$CC -print-prog-name=gprof`
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)])
136 gnu_as=$libc_cv_prog_as_gnu
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=$libc_cv_prog_ld_gnu
143 dnl Run a static link test with -nostdlib -nostartfiles.
144 dnl LIBC_TRY_LINK_STATIC([code], [action-if-true], [action-if-false])
145 AC_DEFUN([LIBC_TRY_LINK_STATIC],
146 [cat > conftest.c <<EOF
147 int _start (void) { return 0; }
148 int __start (void) { return 0; }
151 AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -o conftest
152 conftest.c -static -nostartfiles -nostdlib
153 1>&AS_MESSAGE_LOG_FD])],
157 dnl Test a compiler option or options with an empty input file.
158 dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
159 AC_DEFUN([LIBC_TRY_CC_OPTION],
160 [AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
163 dnl Find and source sysdeps/*/preconfigure.
164 dnl LIBC_PRECONFIGURE([$srcdir], [for])
165 AC_DEFUN([LIBC_PRECONFIGURE], [dnl
166 if frags=`ls -d $1/sysdeps/*/preconfigure 2> /dev/null`
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
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 "$1"]),
185 yes) AC_MSG_ERROR([package version not specified]) ;;
187 *) PKGVERSION="($withval) " ;;
191 PKGVERSION_TEXI=`echo "$PKGVERSION" | sed 's/@/@@/g'`
193 AC_SUBST(PKGVERSION_TEXI)
196 dnl Support the --with-bugurl configure option.
197 dnl ACX_BUGURL(default-bugurl)
198 AC_DEFUN([ACX_BUGURL],[
200 AS_HELP_STRING([--with-bugurl=URL],
201 [Direct users to URL to report a bug]),
203 yes) AC_MSG_ERROR([bug URL not specified]) ;;
217 REPORT_BUGS_TO="<$BUGURL>"
218 REPORT_BUGS_TEXI=@uref{`echo "$BUGURL" | sed 's/@/@@/g'`}
221 AC_SUBST(REPORT_BUGS_TO)
222 AC_SUBST(REPORT_BUGS_TEXI)
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; }
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])
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
244 libc_linker_feature=yes
249 if test $libc_linker_feature = yes; then
254 AC_MSG_RESULT($libc_linker_feature)])
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
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) { $2 return 0; }
281 if ! AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
282 $3 -nostdlib -nostartfiles
283 -S conftest.c -o - | fgrep "$1"
284 1>&AS_MESSAGE_LOG_FD])
286 libc_compiler_builtin_inlined=yes
289 if test $libc_compiler_builtin_inlined = yes; then
294 AC_MSG_RESULT($libc_compiler_builtin_inlined)])
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" ||
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'