alpine: fix compilation without sys/cdefs

Signed-off-by: Rosen Penev <rosenp@gmail.com>

mail/alpine/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=alpine
 PKG_VERSION:=2.23
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=http://alpine.x10host.com/alpine/release/src

mail/alpine/patches/010-cdefs.patch

@@ -0,0 +1,38 @@
+--- a/regex/regex.h
++++ b/regex/regex.h
+@@ -42,16 +42,12 @@
+ #ifndef _REGEX_H_
+ #define	_REGEX_H_
+ 
+-#ifdef WIN32
+ #include <sys/types.h>
+ #define __const
+ #define __BEGIN_DECLS
+ #define __END_DECLS
+ #define __P(_X) _X
+-#else
+-#include <sys/cdefs.h>
+ #define __stdcall
+-#endif
+ 
+ /* types */
+ typedef off_t regoff_t;
+@@ -106,12 +102,16 @@ typedef struct {
+ #define	REG_LARGE	01000	/* force large representation */
+ #define	REG_BACKR	02000	/* force use of backref code */
+ 
+-__BEGIN_DECLS
++#ifdef __cplusplus
++extern "C" {
++#endif
+ int	__stdcall regcomp __P((regex_t *, const char *, int));
+ size_t	__stdcall regerror __P((int, const regex_t *, char *, size_t));
+ int	__stdcall regexec __P((const regex_t *,
+ 	    const char *, size_t, regmatch_t [], int));
+ void	__stdcall regfree __P((regex_t *));
+-__END_DECLS
++#ifdef __cplusplus
++}
++#endif
+ 
+ #endif /* !_REGEX_H_ */