Over the last couple of months quite a few warnings about uninitialized
variables were raised while building GCC. A reason why these warnings
show up on S/390 only is due to the aggressive inlining settings here.
Some of these warnings (2c832ffedf0, b776bdca932, 2786c0221b6,
1657178f59b) could be fixed or in case of a false positive silenced by
initializing the corresponding variable. Since the latter reoccurs and
while bootstrapping such warnings are turned into errors bootstrapping
fails on S/390 consistently. Therefore, for the moment do not turn
those warnings into errors.
config/ChangeLog:
* warnings.m4: Do not turn maybe-uninitialized warnings into errors
on S/390.
fixincludes/ChangeLog:
* configure: Regenerate.
gcc/ChangeLog:
* configure: Regenerate.
libcc1/ChangeLog:
* configure: Regenerate.
libcpp/ChangeLog:
* configure: Regenerate.
libdecnumber/ChangeLog:
* configure: Regenerate.
---
config/warnings.m4 | 20 ++++++++++++++------
fixincludes/configure | 8 +++++++-
gcc/configure | 12 +++++++++---
libcc1/configure | 8 +++++++-
libcpp/configure | 8 +++++++-
libdecnumber/configure | 8 +++++++-
6 files changed, 51 insertions(+), 13 deletions(-)
diff --git a/config/warnings.m4 b/config/warnings.m4
index ce007f9b73e..d977bfb20af 100644
--- a/config/warnings.m4
+++ b/config/warnings.m4
@@ -101,8 +101,10 @@ AC_ARG_ENABLE(werror-always,
AS_HELP_STRING([--enable-werror-always],
[enable -Werror despite compiler version]),
[], [enable_werror_always=no])
-AS_IF([test $enable_werror_always = yes],
- [acx_Var="$acx_Var${acx_Var:+ }-Werror"])
+AS_IF([test $enable_werror_always = yes], [dnl
+ acx_Var="$acx_Var${acx_Var:+ }-Werror"
+ AS_CASE([$host], [s390*-*-*],
+ [acx_Var="$acx_Var -Wno-error=maybe-uninitialized"])])
m4_if($1, [manual],,
[AS_VAR_PUSHDEF([acx_GCCvers], [acx_cv_prog_cc_gcc_$1_or_newer])dnl
AC_CACHE_CHECK([whether $CC is GCC >=$1], acx_GCCvers,
@@ -116,7 +118,9 @@ AS_IF([test $enable_werror_always = yes],
[AS_VAR_SET(acx_GCCvers, yes)],
[AS_VAR_SET(acx_GCCvers, no)])])
AS_IF([test AS_VAR_GET(acx_GCCvers) = yes],
- [acx_Var="$acx_Var${acx_Var:+ }-Werror"])
+ [acx_Var="$acx_Var${acx_Var:+ }-Werror"
+ AS_CASE([$host], [s390*-*-*],
+ [acx_Var="$acx_Var -Wno-error=maybe-uninitialized"])])
AS_VAR_POPDEF([acx_GCCvers])])
m4_popdef([acx_Var])dnl
AC_LANG_POP(C)
@@ -205,8 +209,10 @@ AC_ARG_ENABLE(werror-always,
AS_HELP_STRING([--enable-werror-always],
[enable -Werror despite compiler version]),
[], [enable_werror_always=no])
-AS_IF([test $enable_werror_always = yes],
- [acx_Var="$acx_Var${acx_Var:+ }-Werror"])
+AS_IF([test $enable_werror_always = yes], [dnl
+ acx_Var="$acx_Var${acx_Var:+ }-Werror"
+ AS_CASE([$host], [s390*-*-*],
+ [strict_warn="$strict_warn -Wno-error=maybe-uninitialized"])])
m4_if($1, [manual],,
[AS_VAR_PUSHDEF([acx_GXXvers], [acx_cv_prog_cxx_gxx_$1_or_newer])dnl
AC_CACHE_CHECK([whether $CXX is G++ >=$1], acx_GXXvers,
@@ -220,7 +226,9 @@ AS_IF([test $enable_werror_always = yes],
[AS_VAR_SET(acx_GXXvers, yes)],
[AS_VAR_SET(acx_GXXvers, no)])])
AS_IF([test AS_VAR_GET(acx_GXXvers) = yes],
- [acx_Var="$acx_Var${acx_Var:+ }-Werror"])
+ [acx_Var="$acx_Var${acx_Var:+ }-Werror"
+ AS_CASE([$host], [s390*-*-*],
+ [acx_Var="$acx_Var -Wno-error=maybe-uninitialized"])])
AS_VAR_POPDEF([acx_GXXvers])])
m4_popdef([acx_Var])dnl
AC_LANG_POP(C++)
diff --git a/fixincludes/configure b/fixincludes/configure
index 6e2d67b655b..e0d679cc18e 100755
--- a/fixincludes/configure
+++ b/fixincludes/configure
@@ -4753,7 +4753,13 @@ else
fi
if test $enable_werror_always = yes; then :
- WERROR="$WERROR${WERROR:+ }-Werror"
+ WERROR="$WERROR${WERROR:+ }-Werror"
+ case $host in #(
+ s390*-*-*) :
+ WERROR="$WERROR -Wno-error=maybe-uninitialized" ;; #(
+ *) :
+ ;;
+esac
fi
ac_ext=c
diff --git a/gcc/configure b/gcc/configure
index 0a09777dd42..ea03581537a 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -7064,7 +7064,13 @@ else
fi
if test $enable_werror_always = yes; then :
- strict_warn="$strict_warn${strict_warn:+ }-Werror"
+ strict_warn="$strict_warn${strict_warn:+ }-Werror"
+ case $host in #(
+ s390*-*-*) :
+ strict_warn="$strict_warn -Wno-error=maybe-uninitialized" ;; #(
+ *) :
+ ;;
+esac
fi
ac_ext=cpp
@@ -19013,7 +19019,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 19016 "configure"
+#line 19022 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -19119,7 +19125,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 19122 "configure"
+#line 19128 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
diff --git a/libcc1/configure b/libcc1/configure
index 3610219ba65..e95274d0d46 100755
--- a/libcc1/configure
+++ b/libcc1/configure
@@ -14835,7 +14835,13 @@ else
fi
if test $enable_werror_always = yes; then :
- WERROR="$WERROR${WERROR:+ }-Werror"
+ WERROR="$WERROR${WERROR:+ }-Werror"
+ case $host in #(
+ s390*-*-*) :
+ WERROR="$WERROR -Wno-error=maybe-uninitialized" ;; #(
+ *) :
+ ;;
+esac
fi
ac_ext=c
diff --git a/libcpp/configure b/libcpp/configure
index 7e28606f605..db378c363ee 100755
--- a/libcpp/configure
+++ b/libcpp/configure
@@ -5142,7 +5142,13 @@ else
fi
if test $enable_werror_always = yes; then :
- WERROR="$WERROR${WERROR:+ }-Werror"
+ WERROR="$WERROR${WERROR:+ }-Werror"
+ case $host in #(
+ s390*-*-*) :
+ WERROR="$WERROR -Wno-error=maybe-uninitialized" ;; #(
+ *) :
+ ;;
+esac
fi
ac_ext=c
diff --git a/libdecnumber/configure b/libdecnumber/configure
index 6b62f8ba665..7035aef58dd 100755
--- a/libdecnumber/configure
+++ b/libdecnumber/configure
@@ -3661,7 +3661,13 @@ else
fi
if test $enable_werror_always = yes; then :
- WERROR="$WERROR${WERROR:+ }-Werror"
+ WERROR="$WERROR${WERROR:+ }-Werror"
+ case $host in #(
+ s390*-*-*) :
+ WERROR="$WERROR -Wno-error=maybe-uninitialized" ;; #(
+ *) :
+ ;;
+esac
fi
ac_ext=c
--
2.25.3
