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List: xine-cvslog
Subject: [xine-cvs] HG: xine-lib: Add check for const attribute (for
From: "=?UTF-8?Q?Diego=20'Flameeyes'=20Petten=C3=B2?=" <flameeyes () gmail ! com>
Date: 2008-05-23 18:07:20
Message-ID: 2f9b78e8361f265b2a04.1211310876 () hg ! debian ! org
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# HG changeset patch
# User Diego 'Flameeyes' Pettenò <flameeyes@gmail.com>
# Date 1211310876 -7200
# Node ID 2f9b78e8361f265b2a04e5d5f85ca08d5f7a7fce
# Parent c507526e65a16155bd2665fcf89a159b9f97249f
Add check for const attribute (for mathematical functions).
Add CC_ATTRIBUTE_CONST macro to the attributes.h.
Run CC_ATTRIBUTE_CONST in configure.
Define SUPPORT_ATTRIBUTE_CONST for GCC 3.
Define XINE_CONST to __attribute__((__const__)) if supported.
diff -r 2f9b78e8361f265b2a04e5d5f85ca08d5f7a7fce -r \
c507526e65a16155bd2665fcf89a159b9f97249f configure.ac
--- a/configure.ac Tue May 20 21:14:36 2008 +0200
+++ b/configure.ac Thu May 22 23:42:16 2008 +0200
@@ -2219,6 +2219,7 @@ CC_ATTRIBUTE_UNUSED
CC_ATTRIBUTE_UNUSED
CC_ATTRIBUTE_MALLOC
CC_ATTRIBUTE_PACKED
+CC_ATTRIBUTE_CONST
AC_OPTIMIZATIONS
diff -r 2f9b78e8361f265b2a04e5d5f85ca08d5f7a7fce -r \
c507526e65a16155bd2665fcf89a159b9f97249f m4/attributes.m4
--- a/m4/attributes.m4 Tue May 20 21:14:36 2008 +0200
+++ b/m4/attributes.m4 Thu May 22 23:42:16 2008 +0200
@@ -184,6 +184,14 @@ AC_DEFUN([CC_ATTRIBUTE_PACKED], [
CC_CHECK_ATTRIBUTE(
[packed], ,
[struct astructure { char a; int b; long c; void *d; } \
__attribute__((packed));], + [$1],
+ [$2])
+])
+
+AC_DEFUN([CC_ATTRIBUTE_CONST], [
+ CC_CHECK_ATTRIBUTE(
+ [const], ,
+ [int __attribute__((const)) twopow(int n) { return 1 << n; } ],
[$1],
[$2])
])
diff -r 2f9b78e8361f265b2a04e5d5f85ca08d5f7a7fce -r \
c507526e65a16155bd2665fcf89a159b9f97249f src/xine-utils/attributes.h
--- a/src/xine-utils/attributes.h Tue May 20 21:14:36 2008 +0200
+++ b/src/xine-utils/attributes.h Thu May 22 23:42:16 2008 +0200
@@ -45,6 +45,7 @@
# define SUPPORT_ATTRIBUTE_FORMAT_ARG 1
# define SUPPORT_ATTRIBUTE_MALLOC 1
# define SUPPORT_ATTRIBUTE_UNUSED 1
+# define SUPPORT_ATTRIBUTE_CONST 1
# endif
# if __GNUC__ >= 4
@@ -109,4 +110,10 @@
# define XINE_PACKED
#endif
+#ifdef SUPPORT_ATTRIBUTE_CONST
+# define XINE_CONST __attribute__((__const__))
+#else
+# define XINE_CONST
+#endif
+
#endif /* ATTRIBUTE_H_ */
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