X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=gdbsupport%2Fwarning.m4;h=ea573c63c4a0d08e1527e14b37a8aa29d9e9433a;hb=12afdeecc916e72ced0d614a20cb4d6ad47c17e7;hp=81939ed7610272067d9be565be026c3840bd776b;hpb=8ddd8e0ed83ce09671695540788645e54b2b09a5;p=binutils-gdb.git

diff --git a/gdbsupport/warning.m4 b/gdbsupport/warning.m4
index 81939ed7610..ea573c63c4a 100644
--- 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"