Make the assembler generate an error if there is an attempt to define a section with...

[deliverable/binutils-gdb.git] / gdb / warning.m4

diff --git a/gdb/warning.m4 b/gdb/warning.m4
index f176a3291aa68acf0122609531abb4652425525b..00bcdfa7ea505b9117f651f1174b7b8adc7d4ba0 100644 (file)
--- a/gdb/warning.m4
+++ b/gdb/warning.m4
@@ -1,5 +1,5 @@
 dnl Autoconf configure script for GDB, the GNU debugger.
-dnl Copyright (C) 1995-2018 Free Software Foundation, Inc.
+dnl Copyright (C) 1995-2020 Free Software Foundation, Inc.
 dnl
 dnl This file is part of GDB.
 dnl
@@ -37,13 +37,19 @@ fi
 
 # The options we'll try to enable.
 build_warnings="-Wall -Wpointer-arith \
--Wno-unused -Wunused-value -Wunused-function \
+-Wno-unused -Wunused-value -Wunused-variable -Wunused-function \
 -Wno-switch -Wno-char-subscripts \
 -Wempty-body -Wunused-but-set-parameter -Wunused-but-set-variable \
--Wno-sign-compare -Wno-narrowing -Wno-error=maybe-uninitialized \
+-Wno-sign-compare -Wno-error=maybe-uninitialized \
 -Wno-mismatched-tags \
 -Wno-error=deprecated-register \
--Wsuggest-override"
+-Wsuggest-override \
+-Wimplicit-fallthrough=3 \
+-Wduplicated-cond \
+-Wshadow=local \
+-Wdeprecated-copy \
+-Wdeprecated-copy-dtor \
+-Wredundant-move"
 
 case "${host}" in
   *-*-mingw32*)
@@ -56,7 +62,10 @@ case "${host}" in
     build_warnings="$build_warnings -Wno-unknown-pragmas"
     # Solaris 11 <unistd.h> marks vfork deprecated.
     build_warnings="$build_warnings -Wno-deprecated-declarations" ;;
-  *) build_warnings="$build_warnings -Wformat-nonliteral" ;;
+  *)
+    # Note that gcc requires -Wformat for -Wformat-nonliteral to work,
+    # but there's a special case for this below.
+    build_warnings="$build_warnings -Wformat-nonliteral" ;;
 esac
 
 AC_ARG_ENABLE(build-warnings,
@@ -104,6 +113,12 @@ then
        case $w in
        -Wno-*)
                wtest=`echo $w | sed 's/-Wno-/-W/g'` ;;
+        -Wformat-nonliteral)
+               # gcc requires -Wformat before -Wformat-nonliteral
+               # will work, so stick them together.
+               w="-Wformat $w"
+               wtest="$w"
+               ;;
        *)
                wtest=$w ;;
        esac
@@ -116,7 +131,20 @@ then
            CFLAGS="$CFLAGS -Werror $wtest"
            saved_CXXFLAGS="$CXXFLAGS"
            CXXFLAGS="$CXXFLAGS -Werror $wtest"
-           AC_TRY_COMPILE([],[],WARN_CFLAGS="${WARN_CFLAGS} $w",)
+           if test "x$w" = "x-Wunused-variable"; then
+             # Check for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38958,
+             # fixed in GCC 4.9.  This test is derived from the gdb
+             # source code that triggered this bug in GCC.
+             AC_TRY_COMPILE(
+               [struct scoped_restore_base {};
+                 struct scoped_restore_tmpl : public scoped_restore_base {
+                  ~scoped_restore_tmpl() {}
+                };],
+               [const scoped_restore_base &b = scoped_restore_tmpl();],
+               WARN_CFLAGS="${WARN_CFLAGS} $w",)
+           else
+             AC_TRY_COMPILE([],[],WARN_CFLAGS="${WARN_CFLAGS} $w",)
+           fi
            CFLAGS="$saved_CFLAGS"
            CXXFLAGS="$saved_CXXFLAGS"
        esac