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configure: remove workaround for gcc's -Wno-maybe-uninitialized

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Since r174770 gcc version check is not needed because CXX_FLAG_CHECK
implements the workaround itself.

llvm-svn: 175080
This commit is contained in:
Dmitri Gribenko 2013-02-13 21:19:39 +00:00
parent 3020873a8a
commit 829ef412eb
2 changed files with 16 additions and 44 deletions
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26
autoconf/configure.ac
View File

@ -1272,39 +1272,21 @@ 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])
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 "$GXX" = "yes"
then
CXX_FLAG_CHECK(NO_MAYBE_UNINITIALIZED, [-Wno-maybe-uninitialized])
dnl gcc 4.7 introduced -Wmaybe-uninitialized to distinguish cases which are
dnl known to be uninitialized from cases which might be uninitialized. We
dnl still want to catch the first kind of errors.
if test "$NO_MAYBE_UNINITIALIZED" != "-Wno-maybe-uninitialized"
if test -z "$NO_MAYBE_UNINITIALIZED"
then
CXX_FLAG_CHECK(NO_UNINITIALIZED, [-Wno-uninitialized])
else
dnl Some versions of gcc accept unsupported -W flags if there is
dnl no warning but stop with an error when a warning is
dnl encountered. If this gcc is earlier than 4.7, just use
dnl -Wno-uninitialized.
gxx_version=`$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 "$gxx_version_minor" -ge "7"; then
dnl AC_SUBST doesn't work with empty strings.
NO_UNINITIALIZED=
else
NO_MAYBE_UNINITIALIZED=
CXX_FLAG_CHECK(NO_UNINITIALIZED, [-Wno-uninitialized])
fi
fi
else
NO_UNINITIALIZED=
NO_MAYBE_UNINITIALIZED=
fi
AC_MSG_RESULT([$NO_VARIADIC_MACROS $NO_MISSING_FIELD_INITIALIZERS $NO_NESTED_ANON_TYPES $COVERED_SWITCH_DEFAULT $NO_UNINITIALIZED $NO_MAYBE_UNINITIALIZED])

32
configure vendored
View File

@ -8719,7 +8719,9 @@ if test "${enable_ltdl_install+set}" = set; then
fi
if test x"${enable_ltdl_install-no}" != xno; then
if test x"${enable_ltdl_install-no}" != xno; then
INSTALL_LTDL_TRUE=
INSTALL_LTDL_FALSE='#'
else
@ -8727,7 +8729,9 @@ else
INSTALL_LTDL_FALSE=
fi
if test x"${enable_ltdl_convenience-no}" != xno; then
if test x"${enable_ltdl_convenience-no}" != xno; then
CONVENIENCE_LTDL_TRUE=
CONVENIENCE_LTDL_FALSE='#'
else
@ -10494,7 +10498,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<EOF
#line 10497 "configure"
#line 10501 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@ -12265,32 +12269,18 @@ NO_NESTED_ANON_TYPES=`$CXX -Werror -Wnested-anon-types -fsyntax-only -xc /dev/nu
COVERED_SWITCH_DEFAULT=`$CXX -Werror -Wcovered-switch-default -fsyntax-only -xc /dev/null 2>/dev/null && echo -Wcovered-switch-default`
NO_UNINITIALIZED=
NO_MAYBE_UNINITIALIZED=
if test "$GXX" = "yes"
then
NO_MAYBE_UNINITIALIZED=`$CXX -Werror -Wmaybe-uninitialized -fsyntax-only -xc /dev/null 2>/dev/null && echo -Wno-maybe-uninitialized`
if test "$NO_MAYBE_UNINITIALIZED" != "-Wno-maybe-uninitialized"
if test -z "$NO_MAYBE_UNINITIALIZED"
then
NO_UNINITIALIZED=`$CXX -Werror -Wuninitialized -fsyntax-only -xc /dev/null 2>/dev/null && echo -Wno-uninitialized`
else
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 "$gxx_version_minor" -ge "7"; then
NO_UNINITIALIZED=
else
NO_MAYBE_UNINITIALIZED=
NO_UNINITIALIZED=`$CXX -Werror -Wuninitialized -fsyntax-only -xc /dev/null 2>/dev/null && echo -Wno-uninitialized`
fi
fi
else
NO_UNINITIALIZED=
NO_MAYBE_UNINITIALIZED=
fi
{ echo "$as_me:$LINENO: result: $NO_VARIADIC_MACROS $NO_MISSING_FIELD_INITIALIZERS $NO_NESTED_ANON_TYPES $COVERED_SWITCH_DEFAULT $NO_UNINITIALIZED $NO_MAYBE_UNINITIALIZED" >&5
echo "${ECHO_T}$NO_VARIADIC_MACROS $NO_MISSING_FIELD_INITIALIZERS $NO_NESTED_ANON_TYPES $COVERED_SWITCH_DEFAULT $NO_UNINITIALIZED $NO_MAYBE_UNINITIALIZED" >&6; }