Subject: [PATCH] Configure detection of __attribute__((deprecated))

From: "Rafael Garcia-Suarez" <rgarciasuarez@gmail.com>
Date: Wed, 3 Dec 2008 12:51:36 +0100
Message-ID: <b77c1dce0812030351j33d7b75ci3e2640b33f36acd9@mail.gmail.com>

diff --git a/U/modified/d_attribut.U b/U/modified/d_attribut.U
index 6c1791c..97d8742 100644 (file)
--- a/U/modified/d_attribut.U
+++ b/U/modified/d_attribut.U
@@ -20,47 +20,53 @@
 ?RCS: Revision 3.0.1.1  1994/10/29  16:08:55  ram
 ?RCS: patch36: created by ADO
 ?RCS:
-?MAKE:d_attribute_format d_attribute_malloc d_attribute_nonnull \
-       d_attribute_noreturn d_attribute_pure d_attribute_unused \
-       d_attribute_warn_unused_result d_printf_format_null: \
+?MAKE:d_attribute_deprecated d_attribute_format d_attribute_malloc \
+       d_attribute_nonnull d_attribute_noreturn d_attribute_pure \
+       d_attribute_unused d_attribute_warn_unused_result \
+       d_printf_format_null: \
            Myread Oldconfig cat cc ccflags rm Setvar contains i_stdlib run
 ?MAKE: -pick add $@ %<
-?S:d_attribute_format (d_attribut_format.U):
+?S:d_attribute_format:
 ?S:    This variable conditionally defines HASATTRIBUTE_FORMAT, which
 ?S:    indicates the C compiler can check for printf-like formats.
 ?S:.
+?S:d_attribute_deprecated:
+?S:    This variable conditionally defines HASATTRIBUTE_DEPRECATED, which
+?S:    indicates that GCC can handle the attribute for marking deprecated
+?S:    APIs
+?S:.
 ?S:d_printf_format_null:
 ?S:    This variable conditionally defines PRINTF_FORMAT_NULL_OK, which
 ?S:    indicates the C compiler allows printf-like formats to be null.
 ?S:.
-?S:d_attribute_malloc (d_attribute_malloc.U):
+?S:d_attribute_malloc:
 ?S:    This variable conditionally defines HASATTRIBUTE_MALLOC, which
 ?S:    indicates the C compiler can understand functions as having
 ?S:    malloc-like semantics.
 ?S:.
-?S:d_attribute_nonnull (d_attribute_nonnull.U):
+?S:d_attribute_nonnull:
 ?S:    This variable conditionally defines HASATTRIBUTE_NONNULL, which
 ?S:    indicates that the C compiler can know that certain arguments
 ?S:    must not be NULL, and will check accordingly at compile time.
 ?S:.
-?S:d_attribute_noreturn (d_attribute_noreturn.U):
+?S:d_attribute_noreturn:
 ?S:    This variable conditionally defines HASATTRIBUTE_NORETURN, which
 ?S:    indicates that the C compiler can know that certain functions
 ?S:    are guaranteed never to return.
 ?S:.
-?S:d_attribute_pure (d_attribute_pure.U):
+?S:d_attribute_pure:
 ?S:    This variable conditionally defines HASATTRIBUTE_PURE, which
 ?S:    indicates that the C compiler can know that certain functions
 ?S:    are "pure" functions, meaning that they have no side effects, and
 ?S:    only rely on function input and/or global data for their results.
 ?S:.
-?S:d_attribute_unused (d_attribute_unused.U):
+?S:d_attribute_unused:
 ?S:    This variable conditionally defines HASATTRIBUTE_UNUSED, which
 ?S:    indicates that the C compiler can know that certain variables
 ?S:    and arguments may not always be used, and to not throw warnings
 ?S:    if they don't get used.
 ?S:.
-?S:d_attribute_warn_unused_result (d_attribute_warn_unused_result.U):
+?S:d_attribute_warn_unused_result:
 ?S:    This variable conditionally defines
 ?S:    HASATTRIBUTE_WARN_UNUSED_RESULT, which indicates that the C
 ?S:    compiler can know that certain functions have a return values
@@ -87,9 +93,13 @@
 ?C:HASATTRIBUTE_UNUSED:
 ?C:    Can we handle GCC attribute for unused variables and arguments
 ?C:.
+?C:HASATTRIBUTE_DEPRECATED:
+?C:    Can we handle GCC attribute for marking deprecated APIs
+?C:.
 ?C:HASATTRIBUTE_WARN_UNUSED_RESULT ~ %< (HASATTRIBUTE):
 ?C:    Can we handle GCC attribute for warning on unused results
 ?C:.
+?H:?%<:#$d_attribute_deprecated HASATTRIBUTE_DEPRECATED        /**/
 ?H:?%<:#$d_attribute_format HASATTRIBUTE_FORMAT        /**/
 ?H:?%<:#$d_printf_format_null PRINTF_FORMAT_NULL_OK    /**/
 ?H:?%<:#$d_attribute_noreturn HASATTRIBUTE_NORETURN    /**/
@@ -100,6 +110,7 @@
 ?H:?%<:#$d_attribute_warn_unused_result HASATTRIBUTE_WARN_UNUSED_RESULT        /**/
 ?H:.
 ?F:!attrib !attrib.out !attrib.c
+?LINT:set d_attribute_deprecated
 ?LINT:set d_attribute_format
 ?LINT:set d_printf_format_null
 ?LINT:set d_attribute_malloc
@@ -320,6 +331,34 @@ set d_attribute_unused
 eval $setvar
 $rm -f attrib*
 
+: Look for GCC-style attribute deprecated
+case "$d_attribute_deprecated" in
+'')
+echo " "
+echo "Checking whether your compiler can handle __attribute__((deprecated)) ..." >&4
+$cat >attrib.c <<'EOCP'
+#include <stdio.h>
+int I_am_deprecated(void) __attribute__((deprecated));
+EOCP
+if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
+       if $contains 'warning' attrib.out >/dev/null 2>&1; then
+               echo "Your C compiler doesn't support __attribute__((deprecated))."
+               val="$undef"
+       else
+               echo "Your C compiler supports __attribute__((deprecated))."
+               val="$define"
+       fi
+else
+       echo "Your C compiler doesn't seem to understand __attribute__ at all."
+       val="$undef"
+fi
+;;
+*) val="$d_attribute_deprecated" ;;
+esac
+set d_attribute_deprecated
+eval $setvar
+$rm -f attrib*
+
 : Look for GCC-style attribute warn_unused_result
 case "$d_attribute_warn_unused_result" in
 '')