* config/i386/i386.c (ix86_supports_split_stack): -fsplit-stack
requires assembler support for CFI directives.
libgcc/:
* configure.ac: Test whether assembler supports CFI directives.
* config.host: Only add t-stack and i386/t-stack-i386 to
tmake_file if libgcc_cv_cfi is "yes".
* configure: Rebuild.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@164671
138bc75d-0d04-0410-961f-
82ee72b054a4
+2010-09-27 Ian Lance Taylor <iant@google.com>
+
+ * config/i386/i386.c (ix86_supports_split_stack): -fsplit-stack
+ requires assembler support for CFI directives.
+
2010-09-27 Richard Henderson <rth@redhat.com>
* dwarf2out.c (dwarf2out_cfi_label): Use ASM_OUTPUT_DEBUG_LABEL.
if (report)
error ("%<-fsplit-stack%> currently only supported on GNU/Linux");
ret = false;
+#else
+ if (!dwarf2out_do_cfi_asm ())
+ {
+ if (report)
+ error ("%<-fsplit-stack%> requires "
+ "assembler support for CFI directives");
+ ret = false;
+ }
#endif
return ret;
2010-09-27 Ian Lance Taylor <iant@google.com>
+ * configure.ac: Test whether assembler supports CFI directives.
+ * config.host: Only add t-stack and i386/t-stack-i386 to
+ tmake_file if libgcc_cv_cfi is "yes".
+ * configure: Rebuild.
+
+2010-09-27 Ian Lance Taylor <iant@google.com>
+
* generic-morestack.h: New file.
* generic-morestack.c: New file.
* generic-morestack-thread.c: New file.
i[34567]86-*-linux* | x86_64-*-linux* | \
i[34567]86-*-kfreebsd*-gnu | i[34567]86-*-knetbsd*-gnu | \
i[34567]86-*-gnu*)
- tmake_file="${tmake_file} t-tls t-stack i386/t-stack-i386"
+ tmake_file="${tmake_file} t-tls"
+ if test "$libgcc_cv_cfi" = "yes"; then
+ tmake_file="{$tmake_file} t-stack i386/t-stack-i386"
+ fi
;;
esac
fixed_point=$libgcc_cv_fixed_point
+# Check for assembler CFI support.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether assembler supports CFI directives" >&5
+$as_echo_n "checking whether assembler supports CFI directives... " >&6; }
+if test "${libgcc_cv_cfi+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+int i = __GCC_HAVE_DWARF2_CFI_ASM;
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ libgcc_cv_cfi=yes
+else
+ libgcc_cv_cfi=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_cfi" >&5
+$as_echo "$libgcc_cv_cfi" >&6; }
+
# Check 32bit or 64bit for x86.
case ${host} in
i?86*-*-* | x86_64*-*-*)
fixed_point=$libgcc_cv_fixed_point
AC_SUBST(fixed_point)
+# Check for assembler CFI support.
+AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi],
+ [AC_COMPILE_IFELSE([int i = __GCC_HAVE_DWARF2_CFI_ASM;],
+ [libgcc_cv_cfi=yes],
+ [libgcc_cv_cfi=no])])
+
# Check 32bit or 64bit for x86.
case ${host} in
i?86*-*-* | x86_64*-*-*)