From 5db388f67a97d5fd1d18d1be53dd4e3e196dfe2f Mon Sep 17 00:00:00 2001
From: NicJA <NicJA@fb15a70f-31f2-0310-bbcc-cdcc74a49acc>
Date: Tue, 9 Aug 2016 19:30:14 +0000
Subject: [PATCH] check for -Wreturn-type

git-svn-id: https://svn.aros.org/svn/aros/trunk/AROS@52846 fb15a70f-31f2-0310-bbcc-cdcc74a49acc
---
 config/compiler.cfg.in |  1 +
 config/features        | 29 +++++++++++++++++++++++++++++
 config/features.in     | 10 ++++++++++
 3 files changed, 40 insertions(+)

diff --git a/config/compiler.cfg.in b/config/compiler.cfg.in
index f86baff792..1ece36e740 100644
--- a/config/compiler.cfg.in
+++ b/config/compiler.cfg.in
@@ -66,3 +66,4 @@ NOWARN_CONVERSION_NULL                  := @aros_cflags_conversion_null@
 NOWARN_NARROWING                        := @aros_cflags_narrowing@
 NOWARN_VOLATILE_REGISTER_VAR            := @aros_cflags_volatile_register_var@
 NOWARN_SIZEOF_POINTER_MEMACCESS         := @aros_cflags_sizeof_pointer_memaccess@
+NOWARN_RETURN_TYPE                      := @aros_cflags_return_type@
diff --git a/config/features b/config/features
index 82ab8658bd..dc59311b0e 100755
--- a/config/features
+++ b/config/features
@@ -584,6 +584,7 @@ PACKAGE_URL=
 ac_unique_file="../mmakefile"
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
+aros_cflags_return_type
 aros_cflags_sizeof_pointer_memaccess
 aros_cflags_volatile_register_var
 aros_cflags_narrowing
@@ -2837,6 +2838,7 @@ fi
 #  -Wnarrowing
 #  -Wvolatile-register-var
 #  -Wsizeof-pointer-memaccess
+#  -Wreturn-type
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CC} accepts -Wunused-command-line-argument" >&5
 $as_echo_n "checking whether ${CC} accepts -Wunused-command-line-argument... " >&6; }
@@ -4244,6 +4246,33 @@ if test "x-$aros_sizeof_pointer_memaccess" = "x-yes" ; then
     aros_cflags_sizeof_pointer_memaccess=-Wno-sizeof-pointer-memaccess
 fi
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CC} accepts -Wreturn-type" >&5
+$as_echo_n "checking whether ${CC} accepts -Wreturn-type... " >&6; }
+CFLAGS=-Wreturn-type
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  aros_return_type="yes"
+else
+  aros_return_type="no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $aros_return_type" >&5
+$as_echo "$aros_return_type" >&6; }
+if test "x-$aros_return_type" = "x-yes" ; then
+    aros_cflags_return_type=-Wno-return-type
+fi
+
+
 
 
 
diff --git a/config/features.in b/config/features.in
index 85c6e7246f..ad9018a702 100644
--- a/config/features.in
+++ b/config/features.in
@@ -140,6 +140,7 @@ fi
 #  -Wnarrowing
 #  -Wvolatile-register-var
 #  -Wsizeof-pointer-memaccess
+#  -Wreturn-type
 
 AC_MSG_CHECKING([whether ${CC} accepts -Wunused-command-line-argument])
 CFLAGS=-Wunused-command-line-argument
@@ -575,6 +576,14 @@ if test "x-$aros_sizeof_pointer_memaccess" = "x-yes" ; then
     aros_cflags_sizeof_pointer_memaccess=-Wno-sizeof-pointer-memaccess
 fi
 
+AC_MSG_CHECKING([whether ${CC} accepts -Wreturn-type])
+CFLAGS=-Wreturn-type
+AC_TRY_COMPILE(,, aros_return_type="yes", aros_return_type="no")
+AC_MSG_RESULT($aros_return_type)
+if test "x-$aros_return_type" = "x-yes" ; then
+    aros_cflags_return_type=-Wno-return-type
+fi
+
 AC_SUBST(aros_cflags_lto)
 AC_SUBST(aros_cflags_loop_block)
 AC_SUBST(aros_cflags_loop_interchange)
@@ -637,6 +646,7 @@ AC_SUBST(aros_cflags_conversion_null)
 AC_SUBST(aros_cflags_narrowing)
 AC_SUBST(aros_cflags_volatile_register_var)
 AC_SUBST(aros_cflags_sizeof_pointer_memaccess)
+AC_SUBST(aros_cflags_return_type)
 
 AC_CONFIG_FILES(
     ${aros_targetcfg_dir}/compiler.cfg:compiler.cfg.in
-- 
2.11.4.GIT