[enable_sanity=$enableval],
[enable_sanity=yes])
-AC_SUBST(enable_check_abi)
-AC_ARG_ENABLE([check-abi],
- AC_HELP_STRING([--enable-check-abi],
- [do "make check-abi" in "make check" (no/warn/yes)
- @<:@default=no@:>@]),
- [enable_check_abi=$enableval],
- [enable_check_abi=no])
-
-dnl Arguments to enable or disable building the static, shared, profiled,
-dnl and -fomit-frame-pointer libraries.
-dnl I've disabled this for now since we cannot build glibc without static
-dnl libraries built in the moment.
-dnl AC_ARG_ENABLE([static],
-dnl AC_HELP_STRING([--enable-static],
-dnl [build static library @<:@default=yes@:>@]),
-dnl [static=$enableval],
-dnl [static=yes])
-static=yes
AC_ARG_ENABLE([shared],
AC_HELP_STRING([--enable-shared],
[build shared library @<:@default=yes if GNU ld@:>@]),
fi
AC_SUBST(libc_cv_nss_crypt)
+AC_ARG_ENABLE([obsolete-rpc],
+ AC_HELP_STRING([--enable-obsolete-rpc],
+ [build and install the obsolete RPC code for link-time usage]),
+ [link_obsolete_rpc=$enableval],
+ [link_obsolete_rpc=no])
+AC_SUBST(link_obsolete_rpc)
+
+if test "$link_obsolete_rpc" = yes; then
+ AC_DEFINE(LINK_OBSOLETE_RPC)
+fi
+
# The way shlib-versions is used to generate soversions.mk uses a
# fairly simplistic model for name recognition that can't distinguish
# i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a $host_os
esac
])
+dnl Let sysdeps/*/preconfigure act here, like they can in add-ons.
+LIBC_PRECONFIGURE([$srcdir], [for sysdeps])
+
# An add-on can set this when it wants to disable the sanity check below.
libc_config_ok=no
}
fi
if test -n "$libc_add_on"; then
- if frags=`ls -d $libc_add_on_srcdir/sysdeps/*/preconfigure 2> /dev/null`
- then
- AC_MSG_CHECKING(add-on $libc_add_on for preconfigure fragments)
- for frag in $frags; do
- name=`echo "$frag" | sed 's@/[[^/]]*$@@;s@^.*/@@'`
- echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
- . "$frag"
- done
- AC_MSG_RESULT()
- fi
+ LIBC_PRECONFIGURE([$libc_add_on_srcdir], [add-on $libc_add_on for])
use_add_ons="$use_add_ons $libc_add_on"
add_ons_pfx="$add_ons_pfx $libc_add_on/"
test -z "$libc_add_on_canonical" ||
###
if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
case "$machine-$host_os" in
- *-linux* | *-gnu* | arm*-none*)
+ *-linux* | *-gnu*)
;;
*)
echo "*** The GNU C library is currently not available for this platform."
AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix})
fi
-if test x"$libc_cv_asm_gnu_indirect_function" != xyes -a x"$libc_cv_asm_type_prefix" = xno; then
+if test x"$libc_cv_asm_gnu_indirect_function" != xyes -o x"$libc_cv_asm_type_prefix" = xno; then
if test x"$multi_arch" = xyes; then
AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support])
else
test "x$base_os" != x || case "$os" in
gnu*)
base_os=mach/hurd ;;
-netbsd* | 386bsd* | freebsd* | bsdi*)
- base_os=unix/bsd/bsd4.4 ;;
-osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*)
- base_os=unix/bsd ;;
-sysv* | isc* | esix* | sco* | minix* | irix4* | linux*)
+linux*)
base_os=unix/sysv ;;
-irix6*)
- base_os=unix/sysv/irix6/$os ;;
-solaris[2-9]*)
- base_os=unix/sysv/sysv4 ;;
-none)
- base_os=standalone ;;
esac
# For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
# We have now validated the configuration.
-
-# Look for an `elf' subdirectory of each machine directory.
-# We prepend these rather than inserting them whereever the machine appears
-# because things specified by the machine's ELF ABI should override
-# OS-specific things, and should always be the same for any OS on the
-# machine (otherwise what's the point of an ABI?).
-elf_dirs=
-for d in $add_ons_pfx ''; do
- for m in $mach; do
- if test -d $srcdir/${d}sysdeps$m/elf; then
- elf_dirs="$elf_dirs ${d}sysdeps$m/elf"
- fi
- done
-done
-sysnames="`echo $elf_dirs | sed -e 's,//,/,g'` $sysnames"
-
-
# Expand the list of system names into a full list of directories
# from each element's parent name and Implies file (if present).
set $sysnames
test -n "$enable_debug_configure" &&
echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
- if test -f $xsrcdir$name/Implies; then
- # Collect more names from the `Implies' file (removing comments).
- implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/Implies`"
- implied=
- for x in $implied_candidate; do
- found=no
- if test -d $xsrcdir$name_base/$x; then
- implied="$implied $name_base/$x";
- found=yes
- fi
- for d in $add_ons_pfx ''; do
- try="${d}sysdeps/$x"
- case $d in
- /*) try_srcdir= ;;
- *) try_srcdir=$srcdir/ ;;
- esac
- test -n "$enable_debug_configure" &&
- echo "[DEBUG]: $name implied $x try($d) {$try_srcdir}$try" >&2
- if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
- then
- implied="$implied $try"
+ for implies_file in Implies Implies-before Implies-after; do
+ implies_type=`echo $implies_file | sed s/-/_/`
+ eval ${implies_type}=
+ if test -f $xsrcdir$name/$implies_file; then
+ # Collect more names from the `Implies' file (removing comments).
+ implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`"
+ for x in $implied_candidate; do
+ found=no
+ if test -d $xsrcdir$name_base/$x; then
+ eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\""
found=yes
- case "$sysnames_add_ons" in
- *" $d "*) ;;
- *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
+ fi
+ for d in $add_ons_pfx ''; do
+ try="${d}sysdeps/$x"
+ case $d in
+ /*) try_srcdir= ;;
+ *) try_srcdir=$srcdir/ ;;
esac
+ test -n "$enable_debug_configure" &&
+ echo "[DEBUG]: $name $implies_file $x try($d) {$try_srcdir}$try" >&2
+ if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
+ then
+ eval "${implies_type}=\"\$${implies_type} \$try\""
+ found=yes
+ case "$sysnames_add_ons" in
+ *" $d "*) ;;
+ *|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
+ esac
+ fi
+ done
+ if test $found = no; then
+ AC_MSG_WARN($name/$implies_file specifies nonexistent $x)
fi
done
- if test $found = no; then
- AC_MSG_WARN($name/Implies specifies nonexistent $x)
- fi
- done
- else
- implied=
- fi
+ fi
+ done
# Add NAME to the list of names.
names="$names $name"
parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
changequote([,])dnl
+ test -n "$enable_debug_configure" &&
+ echo "[DEBUG]: $name Implies='$Implies' rest='$*' parent='$parent' \
+Implies_before='$Implies_after' Implies_after='$Implies_after'" >&2
+
# Add the names implied by NAME, and NAME's parent (if it has one), to
# the list of names to be processed (the argument list). We prepend the
# implied names to the list and append the parent. We want implied
# configuration components; this ensures that for sysv4, unix/common
# (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
# after sysv4).
- sysnames="`echo $implied $* $parent`"
+ sysnames="`echo $Implies $* $Implies_before $parent $Implies_after`"
test -n "$sysnames" && set $sysnames
done
# Add the default directories.
-default_sysnames="sysdeps/generic/elf sysdeps/generic"
+default_sysnames="sysdeps/generic"
sysnames="$names $default_sysnames"
AC_SUBST(sysnames)
# The other names were emitted during the scan.
LIBC_PROG_BINUTILS
AC_SUBST(MIG)dnl Needed by sysdeps/mach/configure.in
-# Accept binutils 2.13 or newer.
+# Accept binutils 2.20 or newer.
AC_CHECK_PROG_VER(AS, $AS, --version,
[GNU assembler.* \([0-9]*\.[0-9.]*\)],
- [2.1[3-9]*|2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], AS=: critic_missing="$critic_missing as")
+ [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], AS=: critic_missing="$critic_missing as")
AC_CHECK_PROG_VER(LD, $LD, --version,
[GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
- [2.1[3-9]*|2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld")
-
-# We need the physical current working directory. We cannot use the
-# "pwd -P" shell builtin since that's not portable. Instead we try to
-# find a pwd binary. Note that assigning to the PWD environment
-# variable might have some interesting side effects, so we don't do
-# that.
-AC_PATH_PROG(PWD_P, pwd, no)
-if test "$PWD_P" = no; then
- AC_MSG_ERROR(*** A pwd binary could not be found.)
-fi
+ [2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing ld")
# These programs are version sensitive.
AC_CHECK_TOOL_PREFIX
AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v,
- [version \([egcygnustpi-]*[0-9.]*\)], [3.4* | 4.[0-9]* ],
+ [version \([egcygnustpi-]*[0-9.]*\)], [4.[3-9].* | 4.[1-9][0-9].* | [5-9].* ],
critic_missing="$critic_missing gcc")
AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
[GNU Make[^0-9]*\([0-9][0-9.]*\)],
MSGFMT=: aux_missing="$aux_missing msgfmt")
AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
[GNU texinfo.* \([0-9][0-9.]*\)],
- [4.*],
+ [4.[5-9]*|4.[1-9][0-9]*|[5-9].*],
MAKEINFO=: aux_missing="$aux_missing makeinfo")
AC_CHECK_PROG_VER(SED, sed, --version,
[GNU sed version \([0-9]*\.[0-9.]*\)],
SED=: aux_missing="$aux_missing sed")
AC_CHECK_TOOL(READELF, readelf, false)
+AC_CHECK_TOOL(NM, nm, false)
AC_CHECK_PROGS(AUTOCONF, autoconf, no)
case "x$AUTOCONF" in
AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
libc_cv_initfini_array, [dnl
-cat > conftest.c <<EOF
-int _start (void) { return 0; }
-int __start (void) { return 0; }
+LIBC_TRY_LINK_STATIC([
int foo (void) { return 1; }
int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
-EOF
-if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -o conftest conftest.c
- -static -nostartfiles -nostdlib 1>&AS_MESSAGE_LOG_FD])
-then
- if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
+],
+ [if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then
libc_cv_initfini_array=yes
else
libc_cv_initfini_array=no
- fi
-else
- libc_cv_initfini_array=no
-fi
-rm -f conftest*])
+ fi],
+ [libc_cv_initfini_array=no])
+])
if test $libc_cv_initfini_array != yes; then
AC_MSG_ERROR([Need linker with .init_array/.fini_array support.])
fi
AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
libc_cv_ctors_header, [dnl
libc_cv_ctors_header=yes
- AC_TRY_LINK([], [
-__attribute__ ((constructor)) void ctor (void) { puts("ctor"); }
-__attribute__ ((destructor)) void dtor (void) { puts("dtor"); }
+ LIBC_TRY_LINK_STATIC([
+__attribute__ ((constructor)) void ctor (void) { asm (""); }
+__attribute__ ((destructor)) void dtor (void) { asm (""); }
],
[dnl
AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
libc_commonpagesize=0x2000
libc_relro_required=yes
;;
- ia64*)
- libc_commonpagesize=0x4000
- ;;
- alpha*)
- libc_commonpagesize=0x10000
- libc_relro_required=yes
- ;;
esac
if test $libc_commonpagesize != no; then
rm -f conftest*])
AC_SUBST(libc_cv_Bgroup)
-AC_CACHE_CHECK(for libgcc_s suffix,
- libc_cv_libgcc_s_suffix, [dnl
-cat > conftest.c <<EOF
-int main (void) { return 0; }
-EOF
-changequote(,)dnl
-libc_cv_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
- -fPIC -shared -shared-libgcc -o conftest.so \
- conftest.c -v 2>&1 >/dev/null \
- | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
-changequote([,])dnl
-rm -f conftest*])
-AC_SUBST(libc_cv_libgcc_s_suffix)
-
-AC_CACHE_CHECK(for --as-needed option,
- libc_cv_as_needed, [dnl
-cat > conftest.c <<EOF
-int main (void) { return 0; }
-EOF
-if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
- -fPIC -shared -o conftest.so conftest.c
- -lgcc_s$libc_cv_libgcc_s_suffix -Wl,--as-needed
- -nostdlib 1>&AS_MESSAGE_LOG_FD])
-then
- libc_cv_as_needed=yes
-else
- libc_cv_as_needed=no
-fi
-rm -f conftest*])
-AC_SUBST(libc_cv_as_needed)
-
ASFLAGS_config=
AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
libc_cv_as_noexecstack, [dnl
AC_SUBST(fno_unit_at_a_time)
AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
-cat > conftest.c <<EOF
-int foo;
-main () { return 0;}
-EOF
-if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -Werror -fstack-protector
- -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD])
-then
- libc_cv_ssp=yes
-else
- libc_cv_ssp=no
-fi
-rm -f conftest*])
+LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector],
+ [libc_cv_ssp=yes],
+ [libc_cv_ssp=no])
+])
AC_SUBST(libc_cv_ssp)
AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
fi
fi
-dnl Check whether compiler understands __builtin_expect.
-AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
-[cat > conftest.c <<EOF
-#line $LINENO "configure"
-int foo (int a)
-{
- a = __builtin_expect (a, 10);
- return a == 10 ? 0 : 1;
-}
-EOF
-dnl No \ in command here because it ends up inside ''.
-if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
- -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
- libc_cv_gcc_builtin_expect=yes
-else
- libc_cv_gcc_builtin_expect=no
-fi
-rm -f conftest*])
-if test "$libc_cv_gcc_builtin_expect" = no; then
- AC_MSG_ERROR([support for __builtin_expect needed])
-fi
-
AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
cat > conftest.c <<\EOF
void zero (void *x)
AC_MSG_ERROR([support for the tls_model attribute is required])
fi
+dnl Determine how to disable generation of FMA instructions.
+AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions],
+ libc_cv_cc_nofma, [dnl
+libc_cv_cc_nofma=
+for opt in -ffp-contract=off -mno-fused-madd; do
+ LIBC_TRY_CC_OPTION([$opt], [libc_cv_cc_nofma=$opt; break])
+done])
+
if test -n "$submachine"; then
AC_CACHE_CHECK([for compiler option for CPU variant],
libc_cv_cc_submachine, [dnl
libc_cv_cc_submachine=no
for opt in "-march=$submachine" "-mcpu=$submachine"; do
- if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
+ LIBC_TRY_CC_OPTION([$opt], [
libc_cv_cc_submachine="$opt"
- break
- fi
+ break], [])
done])
if test "x$libc_cv_cc_submachine" = xno; then
AC_MSG_ERROR([${CC-cc} does not support $submachine])
sizeof_long_double=$ac_cv_sizeof_long_double
AC_SUBST(sizeof_long_double)
+CPPUNDEFS=
+dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE.
+dnl Since we are building the implementations of the fortified functions here,
+dnl having the macro defined interacts very badly.
+AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source,
+[AC_TRY_COMPILE([], [
+#ifdef _FORTIFY_SOURCE
+# error bogon
+#endif],
+ [libc_cv_predef_fortify_source=no],
+ [libc_cv_predef_fortify_source=yes])])
+if test $libc_cv_predef_fortify_source = yes; then
+ CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE"
+fi
+AC_SUBST(CPPUNDEFS)
+
+dnl Check for silly hacked compilers inserting -fstack-protector.
+dnl This breaks badly for the early startup code we compile, since
+dnl the compiled code can refer to a magic machine-dependent location
+dnl for the canary value before we have sufficient setup for that to
+dnl work. It's also questionable to build all of libc with this flag
+dnl even when you're doing that for most applications you build, since
+dnl libc's code is so heavily-used and performance-sensitive. If we
+dnl ever really want to make that work, it should be enabled explicitly
+dnl in the libc build, not inherited from implicit compiler settings.
+AC_CACHE_CHECK([whether $CC implicitly enables -fstack-protector],
+ libc_cv_predef_stack_protector, [
+AC_TRY_COMPILE([extern void foobar (char *);],
+ [char large_array[2048]; foobar (large_array);], [
+libc_undefs=`$NM -u conftest.o |
+ LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \
+ 2>&AS_MESSAGE_LOG_FD` || {
+ AC_MSG_ERROR([confusing output from $NM -u])
+}
+echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'"
+# On some architectures, there are architecture-specific undefined
+# symbols (resolved by the linker), so filter out unknown symbols.
+# This will fail to produce the correct result if the compiler
+# defaults to -fstack-protector but this produces an undefined symbol
+# other than __stack_chk_fail. However, compilers like that have not
+# been encountered in practice.
+libc_undefs=`echo "$libc_undefs" | egrep '^(foobar|__stack_chk_fail)$'`
+case "$libc_undefs" in
+foobar) libc_cv_predef_stack_protector=no ;;
+'__stack_chk_fail
+foobar') libc_cv_predef_stack_protector=yes ;;
+*) AC_MSG_ERROR([unexpected symbols in test: $libc_undefs]) ;;
+esac],
+ [AC_MSG_ERROR([test compilation failed])])
+])
+libc_extra_cflags=
+if test $libc_cv_predef_stack_protector = yes; then
+ libc_extra_cflags=-fno-stack-protector
+fi
+AC_SUBST(libc_extra_cflags)
+
### End of automated tests.
### Now run sysdeps configure fragments.
AC_SUBST(libc_cv_cpp_asm_debuginfo)
AC_SUBST(libc_cv_cc_sse4)
AC_SUBST(libc_cv_cc_avx)
+AC_SUBST(libc_cv_cc_sse2avx)
AC_SUBST(libc_cv_cc_novzeroupper)
AC_SUBST(libc_cv_cc_fma4)
+AC_SUBST(libc_cv_cc_nofma)
AC_SUBST(libc_cv_as_i686)
+AC_SUBST(libc_cv_sparc_as_vis3)
AC_SUBST(use_ldconfig)
AC_SUBST(ldd_rewrite_script)
AC_SUBST(libc_cv_pic_default)
AC_SUBST(profile)
-AC_SUBST(bounded)
AC_SUBST(static_nss)
-AC_SUBST(nopic_initfini)
AC_SUBST(DEFINES)
projects / platform / upstream / glibc.git / blobdiff