[gdb/symtab] Fix race on dwarf2_per_cu_data::{queued,is_debug_type}

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

diff --git a/gdbsupport/warning.m4 b/gdbsupport/warning.m4
index 81939ed7610272067d9be565be026c3840bd776b..ea573c63c4a0d08e1527e14b37a8aa29d9e9433a 100644 (file)
--- a/gdbsupport/warning.m4
+++ b/gdbsupport/warning.m4
@@ -1,5 +1,5 @@
 dnl Autoconf configure script for GDB, the GNU debugger.
-dnl Copyright (C) 1995-2020 Free Software Foundation, Inc.
+dnl Copyright (C) 1995-2023 Free Software Foundation, Inc.
 dnl
 dnl This file is part of GDB.
 dnl
@@ -54,6 +54,13 @@ build_warnings="-Wall -Wpointer-arith \
 -Wstrict-null-sentinel \
 "
 
+# The -Wmissing-prototypes flag will be accepted by GCC, but results
+# in a warning being printed about the flag not being valid for C++,
+# this is something to do with using ccache, and argument ordering.
+if test "$GDB_COMPILER_TYPE" != gcc; then
+  build_warnings="$build_warnings -Wmissing-prototypes"
+fi
+
 case "${host}" in
   *-*-mingw32*)
     # Enable -Wno-format by default when using gcc on mingw since many
@@ -138,15 +145,23 @@ then
              # Check for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38958,
              # fixed in GCC 4.9.  This test is derived from the gdb
              # source code that triggered this bug in GCC.
-             AC_TRY_COMPILE(
-               [struct scoped_restore_base {};
-                 struct scoped_restore_tmpl : public scoped_restore_base {
-                  ~scoped_restore_tmpl() {}
-                };],
-               [const scoped_restore_base &b = scoped_restore_tmpl();],
-               WARN_CFLAGS="${WARN_CFLAGS} $w",)
+             AC_COMPILE_IFELSE(
+               [AC_LANG_PROGRAM(
+                  [struct scoped_restore_base {};
+                   struct scoped_restore_tmpl : public scoped_restore_base {
+                     ~scoped_restore_tmpl() {}
+                   };],
+                  [const scoped_restore_base &b = scoped_restore_tmpl();]
+                )],
+               [WARN_CFLAGS="${WARN_CFLAGS} $w"],
+               []
+             )
            else
-             AC_TRY_COMPILE([],[],WARN_CFLAGS="${WARN_CFLAGS} $w",)
+             AC_COMPILE_IFELSE(
+               [AC_LANG_PROGRAM([], [])],
+               [WARN_CFLAGS="${WARN_CFLAGS} $w"],
+               []
+             )
            fi
            CFLAGS="$saved_CFLAGS"
            CXXFLAGS="$saved_CXXFLAGS"