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configure: Allow user override LD, AR, OBJCOPY, and GPROF
[glibc.git] / 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 "$CC" in
118 *fuse-ld=lld*) LDNAME=ld.lld;;
119 *) LDNAME=ld;;
120 esac
121 if test -z "$LD"; then
122 LD=`$CC -print-prog-name=$LDNAME`
123 fi
124 if test -z "$AR"; then
125 AR=`$CC -print-prog-name=ar`
126 fi
127 AC_SUBST(AR)
128 if test -z "$OBJCOPY"; then
129 OBJCOPY=`$CC -print-prog-name=objcopy`
130 fi
131 AC_SUBST(OBJCOPY)
132 if test -z "$GPROF"; then
133 GPROF=`$CC -print-prog-name=gprof`
134 fi
135 AC_SUBST(GPROF)
136 ])
137
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; }
144 $1
145 EOF
146 AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -o conftest
147 conftest.c -static -nostartfiles -nostdlib
148 1>&AS_MESSAGE_LOG_FD])],
149 [$2], [$3])
150 rm -f conftest*])
151
152 dnl Test a compiler option or options with an empty input file.
153 dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
154 AC_DEFUN([LIBC_TRY_CC_OPTION],
155 [AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
156 [$2], [$3])])
157
158 dnl Find and source sysdeps/*/preconfigure.
159 dnl LIBC_PRECONFIGURE([$srcdir], [for])
160 AC_DEFUN([LIBC_PRECONFIGURE], [dnl
161 if frags=`ls -d $1/sysdeps/*/preconfigure 2> /dev/null`
162 then
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 $ECHO_C" >&AS_MESSAGE_FD
167 . "$frag"
168 done
169 AC_MSG_RESULT()
170 fi])
171
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 "$1"]),
179 [case "$withval" in
180 yes) AC_MSG_ERROR([package version not specified]) ;;
181 no) PKGVERSION= ;;
182 *) PKGVERSION="($withval) " ;;
183 esac],
184 PKGVERSION="($1) "
185 )
186 PKGVERSION_TEXI=`echo "$PKGVERSION" | sed 's/@/@@/g'`
187 AC_SUBST(PKGVERSION)
188 AC_SUBST(PKGVERSION_TEXI)
189 ])
190
191 dnl Support the --with-bugurl configure option.
192 dnl ACX_BUGURL(default-bugurl)
193 AC_DEFUN([ACX_BUGURL],[
194 AC_ARG_WITH(bugurl,
195 AS_HELP_STRING([--with-bugurl=URL],
196 [Direct users to URL to report a bug]),
197 [case "$withval" in
198 yes) AC_MSG_ERROR([bug URL not specified]) ;;
199 no) BUGURL=
200 ;;
201 *) BUGURL="$withval"
202 ;;
203 esac],
204 BUGURL="$1"
205 )
206 case ${BUGURL} in
207 "")
208 REPORT_BUGS_TO=
209 REPORT_BUGS_TEXI=
210 ;;
211 *)
212 REPORT_BUGS_TO="<$BUGURL>"
213 REPORT_BUGS_TEXI=@uref{`echo "$BUGURL" | sed 's/@/@@/g'`}
214 ;;
215 esac;
216 AC_SUBST(REPORT_BUGS_TO)
217 AC_SUBST(REPORT_BUGS_TEXI)
218 ])
219
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 $1])
224 libc_linker_feature=no
225 cat > conftest.c <<EOF
226 int _start (void) { return 42; }
227 EOF
228 if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
229 $2 -nostdlib -nostartfiles
230 -fPIC -shared -o conftest.so conftest.c
231 1>&AS_MESSAGE_LOG_FD])
232 then
233 if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp $2 -nostdlib \
234 -nostartfiles -fPIC -shared -o conftest.so conftest.c 2>&1 \
235 | grep "warning: $1 ignored" > /dev/null 2>&1; then
236 true
237 else
238 libc_linker_feature=yes
239 fi
240 fi
241 rm -f conftest*
242 if test $libc_linker_feature = yes; then
243 $3
244 else
245 $4
246 fi
247 AC_MSG_RESULT($libc_linker_feature)])
248
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
254 $1 = $2"])
255
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) { $2 return 0; }
273 EOF
274 if ! AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
275 $3 -nostdlib -nostartfiles
276 -S conftest.c -o - | grep -F "$1"
277 1>&AS_MESSAGE_LOG_FD])
278 then
279 libc_compiler_builtin_inlined=yes
280 fi
281 rm -f conftest*
282 if test $libc_compiler_builtin_inlined = yes; then
283 $4
284 else
285 $5
286 fi
287 AC_MSG_RESULT($libc_compiler_builtin_inlined)])
288
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 "$libc_cv_slibdir" ||
295 case "$prefix" in
296 /usr | /usr/)
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'
303 fi
304 ;;
305 esac])
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