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 $host_os
test -n "$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 $sysnames
done
MSGFMT=: aux_missing="$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
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.
projects / platform / upstream / glibc.git / blobdiff