Add support for subsections to the ELF assembler. Fixes PR8717.

[oota-llvm.git] / autoconf / configure.ac

diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index ae615df2029ba34b45d994a57ba3ac37f7b2c971..0097db3d681d87a9dedd3da921cf9a4d0cac1009 100644 (file)
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -1270,43 +1270,24 @@ dnl Check optional compiler flags.
 AC_MSG_CHECKING([optional compiler flags])
 CXX_FLAG_CHECK(NO_VARIADIC_MACROS, [-Wno-variadic-macros])
 CXX_FLAG_CHECK(NO_MISSING_FIELD_INITIALIZERS, [-Wno-missing-field-initializers])
 AC_MSG_CHECKING([optional compiler flags])
 CXX_FLAG_CHECK(NO_VARIADIC_MACROS, [-Wno-variadic-macros])
 CXX_FLAG_CHECK(NO_MISSING_FIELD_INITIALIZERS, [-Wno-missing-field-initializers])

-CXX_FLAG_CHECK(NO_NESTED_ANON_TYPES, [-Wno-nested-anon-types])

 CXX_FLAG_CHECK(COVERED_SWITCH_DEFAULT, [-Wcovered-switch-default])
 CXX_FLAG_CHECK(COVERED_SWITCH_DEFAULT, [-Wcovered-switch-default])

+

 dnl GCC's potential uninitialized use analysis is weak and presents lots of
 dnl false positives, so disable it.
 dnl GCC's potential uninitialized use analysis is weak and presents lots of
 dnl false positives, so disable it.

+NO_UNINITIALIZED=
+NO_MAYBE_UNINITIALIZED=

 if test "$GXX" = "yes"
 then
   CXX_FLAG_CHECK(NO_MAYBE_UNINITIALIZED, [-Wno-maybe-uninitialized])
   dnl gcc 4.7 introduced -Wmaybe-uninitialized to distinguish cases which are
 if test "$GXX" = "yes"
 then
   CXX_FLAG_CHECK(NO_MAYBE_UNINITIALIZED, [-Wno-maybe-uninitialized])
   dnl gcc 4.7 introduced -Wmaybe-uninitialized to distinguish cases which are

-  dnl known to be uninitialized from cases which might be uninitialized.  We 
+  dnl known to be uninitialized from cases which might be uninitialized.  We

   dnl still want to catch the first kind of errors.
   dnl still want to catch the first kind of errors.

-  if test "$NO_MAYBE_UNINITIALIZED" != "-Wno-maybe-uninitialized"
+  if test -z "$NO_MAYBE_UNINITIALIZED"

   then
     CXX_FLAG_CHECK(NO_UNINITIALIZED, [-Wno-uninitialized])
   then
     CXX_FLAG_CHECK(NO_UNINITIALIZED, [-Wno-uninitialized])

-  else
-    dnl Some versions of gcc accept unsupported -W flags if there is
-    dnl no warning but stop with an error when a warning is
-    dnl encountered.  If this gcc is earlier than 4.7, just use
-    dnl -Wno-uninitialized.
-    gxx_version=`$CXX -dumpversion`
-    gxx_version_major=`echo $gxx_version | cut -d'.' -f1`
-    gxx_version_minor=`echo $gxx_version | cut -d'.' -f2`
-    gxx_version_patch=`echo $gxx_version | cut -d'.' -f3`
-
-    if    test "$gxx_version_major" -ge "4" \
-       && test "$gxx_version_minor" -ge "7"; then
-      dnl AC_SUBST doesn't work with empty strings.
-      NO_UNINITIALIZED=
-    else
-      NO_MAYBE_UNINITIALIZED=
-      CXX_FLAG_CHECK(NO_UNINITIALIZED, [-Wno-uninitialized])
-    fi

   fi
   fi

-else
-  NO_UNINITIALIZED=
-  NO_MAYBE_UNINITIALIZED=

 fi
 fi

-AC_MSG_RESULT([$NO_VARIADIC_MACROS $NO_MISSING_FIELD_INITIALIZERS $NO_NESTED_ANON_TYPES $COVERED_SWITCH_DEFAULT $NO_UNINITIALIZED $NO_MAYBE_UNINITIALIZED])
+AC_MSG_RESULT([$NO_VARIADIC_MACROS $NO_MISSING_FIELD_INITIALIZERS $COVERED_SWITCH_DEFAULT $NO_UNINITIALIZED $NO_MAYBE_UNINITIALIZED])

 
 AC_ARG_WITH([python],
             [AS_HELP_STRING([--with-python], [path to python])],
 
 AC_ARG_WITH([python],
             [AS_HELP_STRING([--with-python], [path to python])],


@@ -1512,6 +1493,7 @@ AC_CHECK_HEADERS([sys/mman.h sys/param.h sys/resource.h sys/time.h sys/uio.h])
 AC_CHECK_HEADERS([sys/types.h sys/ioctl.h malloc/malloc.h mach/mach.h])
 AC_CHECK_HEADERS([valgrind/valgrind.h])
 AC_CHECK_HEADERS([fenv.h])
 AC_CHECK_HEADERS([sys/types.h sys/ioctl.h malloc/malloc.h mach/mach.h])
 AC_CHECK_HEADERS([valgrind/valgrind.h])
 AC_CHECK_HEADERS([fenv.h])

+AC_CHECK_DECLS([FE_ALL_EXCEPT, FE_INEXACT], [], [], [[#include <fenv.h>]])

 if test "$LLVM_ENABLE_THREADS" -eq 1 && test "$ENABLE_PTHREADS" -eq 1 ; then
   AC_CHECK_HEADERS(pthread.h,
                    AC_SUBST(HAVE_PTHREAD, 1),
 if test "$LLVM_ENABLE_THREADS" -eq 1 && test "$ENABLE_PTHREADS" -eq 1 ; then
   AC_CHECK_HEADERS(pthread.h,
                    AC_SUBST(HAVE_PTHREAD, 1),