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 OBJCOPY=`$CC -print-prog-name=objcopy`
127 GPROF=`$CC -print-prog-name=gprof`
130 # Determine whether we are using GNU binutils.
131 AC_CACHE_CHECK(whether $AS is GNU as, libc_cv_prog_as_gnu,
132 [LIBC_PROG_FOO_GNU($AS, libc_cv_prog_as_gnu=yes, libc_cv_prog_as_gnu=no)])
134 gnu_as=$libc_cv_prog_as_gnu
136 AC_CACHE_CHECK(whether $LD is GNU ld, libc_cv_prog_ld_gnu,
137 [LIBC_PROG_FOO_GNU($LD, libc_cv_prog_ld_gnu=yes, libc_cv_prog_ld_gnu=no)])
138 gnu_ld=$libc_cv_prog_ld_gnu
141 dnl Run a static link test with -nostdlib -nostartfiles.
142 dnl LIBC_TRY_LINK_STATIC([code], [action-if-true], [action-if-false])
143 AC_DEFUN([LIBC_TRY_LINK_STATIC],
144 [cat > conftest.c <<EOF
145 int _start (void) { return 0; }
146 int __start (void) { return 0; }
149 AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -o conftest
150 conftest.c -static -nostartfiles -nostdlib
151 1>&AS_MESSAGE_LOG_FD])],
155 dnl Test a compiler option or options with an empty input file.
156 dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
157 AC_DEFUN([LIBC_TRY_CC_OPTION],
158 [AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
161 dnl Find and source sysdeps/*/preconfigure.
162 dnl LIBC_PRECONFIGURE([$srcdir], [for])
163 AC_DEFUN([LIBC_PRECONFIGURE], [dnl
164 if frags=`ls -d $1/sysdeps/*/preconfigure 2> /dev/null`
166 AC_MSG_CHECKING($2 preconfigure fragments)
167 for frag in $frags; do
168 name=`echo "$frag" | sed 's@/[[^/]]*[$]@@;s@^.*/@@'`
169 echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
175 # These two macros are taken from GCC's config/acx.m4.
176 dnl Support the --with-pkgversion configure option.
177 dnl ACX_PKGVERSION(default-pkgversion)
178 AC_DEFUN([ACX_PKGVERSION],[
179 AC_ARG_WITH(pkgversion,
180 AS_HELP_STRING([--with-pkgversion=PKG],
181 [Use PKG in the version string in place of "$1"]),
183 yes) AC_MSG_ERROR([package version not specified]) ;;
185 *) PKGVERSION="($withval) " ;;
189 PKGVERSION_TEXI=`echo "$PKGVERSION" | sed 's/@/@@/g'`
191 AC_SUBST(PKGVERSION_TEXI)
194 dnl Support the --with-bugurl configure option.
195 dnl ACX_BUGURL(default-bugurl)
196 AC_DEFUN([ACX_BUGURL],[
198 AS_HELP_STRING([--with-bugurl=URL],
199 [Direct users to URL to report a bug]),
201 yes) AC_MSG_ERROR([bug URL not specified]) ;;
215 REPORT_BUGS_TO="<$BUGURL>"
216 REPORT_BUGS_TEXI=@uref{`echo "$BUGURL" | sed 's/@/@@/g'`}
219 AC_SUBST(REPORT_BUGS_TO)
220 AC_SUBST(REPORT_BUGS_TEXI)
223 dnl Check linker option support.
224 dnl LIBC_LINKER_FEATURE([ld_option], [cc_option], [action-if-true], [action-if-false])
225 AC_DEFUN([LIBC_LINKER_FEATURE],
226 [AC_MSG_CHECKING([for linker that supports $1])
227 libc_linker_feature=no
228 if test x"$gnu_ld" = x"yes"; 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 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp $2 -nostdlib \
238 -nostartfiles -fPIC -shared -o conftest.so conftest.c 2>&1 \
239 | grep "warning: $1 ignored" > /dev/null 2>&1; then
242 libc_linker_feature=yes
247 if test $libc_linker_feature = yes; then
252 AC_MSG_RESULT($libc_linker_feature)])
254 dnl Add a makefile variable, with value set from a shell string
255 dnl (expanded by the shell inside double quotes), to config.make.
256 dnl LIBC_CONFIG_VAR(make-variable, shell-value)
257 AC_DEFUN([LIBC_CONFIG_VAR],
258 [config_vars="$config_vars
261 dnl Check that function FUNC was inlined as a builtin. The code fragment
262 dnl CODE is compiled with additional options CC_OPTION. If FUNC is
263 dnl not found in the assembly then it is assumed the compiler has support
264 dnl for this builtin and has inlined the call. If the compiler has the
265 dnl feature then ACTION-IF-TRUE is called, otherwise ACTION-IF-FALSE.
266 dnl It is up to the caller to provide a CC_OPTION that ensures the
267 dnl builtin is inlined if present.
268 dnl Warning: This may not work for some machines. For example on ARM the
269 dnl ABI dictates that some functions should not be inlined and instead
270 dnl should be provided by a compiler helper library e.g. __aeabi_memcpy.
271 dnl This is done to reduce code size.
272 dnl LIBC_COMPILER_BUILTIN([func], [code], [cc_option], [action-if-true], [action-if-false])
273 AC_DEFUN([LIBC_COMPILER_BUILTIN_INLINED],
274 [AC_MSG_CHECKING([for compiler support of inlined builtin function $1])
275 libc_compiler_builtin_inlined=no
276 cat > conftest.c <<EOF
277 int _start (void) { $2 return 0; }
279 if ! AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
280 $3 -nostdlib -nostartfiles
281 -S conftest.c -o - | grep -F "$1"
282 1>&AS_MESSAGE_LOG_FD])
284 libc_compiler_builtin_inlined=yes
287 if test $libc_compiler_builtin_inlined = yes; then
292 AC_MSG_RESULT($libc_compiler_builtin_inlined)])
294 dnl Default to slibdir named SLIBDIR instead of "lib", and rtlddir
295 dnl named RTLDDIR instead of "lib". This is used to put 64-bit
296 dnl libraries in /lib64.
297 dnl LIBC_SLIBDIR_RTLDDIR([slibdir], [rtlddir])
298 AC_DEFUN([LIBC_SLIBDIR_RTLDDIR],
299 [test -n "$libc_cv_slibdir" ||
302 libc_cv_slibdir='/$1'
303 libc_cv_rtlddir='/$2'
304 if test "$libdir" = '${exec_prefix}/lib'; then
305 libdir='${exec_prefix}/$1';
306 # Locale data can be shared between 32-bit and 64-bit libraries.
307 libc_cv_complocaledir='${exec_prefix}/lib/locale'