Bug 20116: Fix use after free in pthread_create()

[thirdparty/glibc.git] / aclocal.m4

dnl We require that everyone use exactly the same Autoconf version so that
dnl the internal functions defined and used by the main configure script
dnl match those expected by the fragments.  When changing this version,
dnl install.texi also needs to be updated.
m4_define([GLIBC_AUTOCONF_VERSION], [2.69])
m4_if(m4_defn([AC_AUTOCONF_VERSION]), GLIBC_AUTOCONF_VERSION, [],
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Exactly version GLIBC_AUTOCONF_VERSION of Autoconf is required but you have
m4_defn([AC_AUTOCONF_VERSION])
), [63])])dnl
dnl
dnl We define the macro GLIBC_PROVIDES to do an AC_PROVIDE for each macro
dnl which appears in configure.ac before the sysdep configure scripts are run.
dnl Each sysdep configure.ac does GLIBC_PROVIDES first, to avoid any
dnl AC_REQUIREs or AC_BEFOREs duplicating their code.
dnl
define([GLIBC_PROVIDES], [dnl
AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
AC_PROVIDE([AC_CONFIG_SUBDIRS])dnl
AC_PROVIDE([_AS_ECHO_N_PREPARE])dnl
AC_PROVIDE([_AS_ECHO_PREPARE])dnl
AC_PROVIDE([_AS_CR_PREPARE])dnl
AC_PROVIDE([_AS_TR_SH_PREPARE])dnl
AC_PROVIDE([_AS_VAR_ARITH_PREPARE])dnl
AC_PROVIDE([AC_PROG_INSTALL])dnl
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AC_PROVIDE([_AS_TEST_PREPARE])dnl
AC_PROVIDE([_AS_BASENAME_PREPARE])dnl
AC_PROVIDE([_AS_ME_PREPARE])dnl
AC_PROVIDE([_AS_LINENO_PREPARE])dnl
AC_PROVIDE([AS_SHELL_FN_as_fn_set_status])dnl
AC_PROVIDE([AS_SHELL_FN_as_fn_exit])dnl
AC_PROVIDE([AS_SHELL_FN_as_fn_arith])dnl
AC_PROVIDE([AS_SHELL_FN_ac_fn_c_try_compile])dnl
define([AS_MESSAGE_LOG_FD],5)dnl
define([AS_MESSAGE_FD],6)dnl
dnl Ripped out of AS_INIT, which does more cruft we do not want.
m4_wrap([m4_divert_pop([BODY])[]])
m4_divert_push([BODY])[]dnl
dnl End of ripped out of AS_INIT.
# This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
define([_AC_LANG], [C])dnl
])dnl
dnl
dnl Check for a symbol
dnl
AC_DEFUN([AC_CHECK_SYMBOL], [dnl
AC_MSG_CHECKING(for $1)
AC_CACHE_VAL(ac_cv_check_symbol_$1, [dnl
AC_TRY_LINK(,
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extern char *$1[]; puts(*$1);,
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AC_MSG_RESULT($ac_cv_check_symbol_$1)])dnl
dnl

dnl Locate a program and check that its version is acceptable.
dnl AC_PROG_CHECK_VER(var, namelist, version-switch,
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AC_DEFUN([AC_CHECK_PROG_VER],
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  ac_prog_version=`<<$>>$1 $3 2>&1 ifelse(<<$4>>,,,
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ifelse([$6],,,
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dnl These modifications are to allow for an empty cross compiler tree.
define([_AC_COMPILER_EXEEXT], [EXEEXT=
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AC_DEFUN([LIBC_PROG_FOO_GNU],
[# Most GNU programs take a -v and spit out some text including
# the word 'GNU'.  Some try to read stdin, so give them /dev/null.
if $1 -o conftest -v </dev/null 2>&1 | grep GNU > /dev/null 2>&1; then
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rm -fr contest*])

AC_DEFUN([LIBC_PROG_BINUTILS],
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AS=`$CC -print-prog-name=as`
LD=`$CC -print-prog-name=ld`
AR=`$CC -print-prog-name=ar`
AC_SUBST(AR)
OBJDUMP=`$CC -print-prog-name=objdump`
AC_SUBST(OBJDUMP)
OBJCOPY=`$CC -print-prog-name=objcopy`
AC_SUBST(OBJCOPY)

# Determine whether we are using GNU binutils.
AC_CACHE_CHECK(whether $AS is GNU as, libc_cv_prog_as_gnu,
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rm -f a.out
gnu_as=$libc_cv_prog_as_gnu

AC_CACHE_CHECK(whether $LD is GNU ld, libc_cv_prog_ld_gnu,
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gnu_ld=$libc_cv_prog_ld_gnu
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dnl Run a static link test with -nostdlib -nostartfiles.
dnl LIBC_TRY_LINK_STATIC([code], [action-if-true], [action-if-false])
AC_DEFUN([LIBC_TRY_LINK_STATIC],
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int _start (void) { return 0; }
int __start (void) { return 0; }
$1
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AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -o conftest
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rm -f conftest*])

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AC_DEFUN([LIBC_TRY_CC_OPTION],
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# These two macros are taken from GCC's config/acx.m4.
dnl Support the --with-pkgversion configure option.
dnl ACX_PKGVERSION(default-pkgversion)
AC_DEFUN([ACX_PKGVERSION],[
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dnl Support the --with-bugurl configure option.
dnl ACX_BUGURL(default-bugurl)
AC_DEFUN([ACX_BUGURL],[
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    ;;
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AC_DEFUN([LIBC_LINKER_FEATURE],
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int _start (void) { return 42; }
EOF
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dnl Add a makefile variable, with value set from a shell string
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AC_DEFUN([LIBC_CONFIG_VAR],
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dnl Check that function FUNC was inlined as a builtin.  The code fragment
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AC_DEFUN([LIBC_COMPILER_BUILTIN_INLINED],
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libc_compiler_builtin_inlined=no
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int _start (void) { $2 return 0; }
EOF
if ! AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
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dnl Default to slibdir named SLIBDIR instead of "lib", and rtlddir
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dnl LIBC_SLIBDIR_RTLDDIR([slibdir], [rtlddir])
AC_DEFUN([LIBC_SLIBDIR_RTLDDIR],
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    # Locale data can be shared between 32-bit and 64-bit libraries.
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  ;;
esac])