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Remove check for anonymous unions from configure and cmake config

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Anonymous unions/structs are technically a custom GNU C99 feature but
was already widely supported by other compilers. With C11 this feature
has become a standard feature so all compilers nowadays support it.

Change-Id: I1ef5f6f21f0135a628a63553c39515fa4549ce87
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Frank Lichtenheld <frank@lichtenheld.com>
Message-Id: <20240710160238.190189-1-frank@lichtenheld.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg28914.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
This commit is contained in:
Arne Schwabe 2024-07-10 18:02:38 +02:00 committed by Gert Doering
parent 992da812ad
commit b8b2d17f47
3 changed files with 1 additions and 36 deletions
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3
config.h.cmake.in
View File

@ -65,9 +65,6 @@
/* Enable --x509-username-field feature */
#cmakedefine ENABLE_X509ALTUSERNAME
/* Compiler supports anonymous unions */
#define HAVE_ANONYMOUS_UNION_SUPPORT
/* Define to 1 if you have the <arpa/inet.h> header file. */
#cmakedefine HAVE_ARPA_INET_H 1

22
configure.ac
View File

@ -564,28 +564,6 @@ AC_CHECK_DECLS(
,
[[${SOCKET_INCLUDES}]]
)
AC_MSG_CHECKING([anonymous union support])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
struct mystruct {
union {
int m1;
char m2;
};
};
]],
[[
struct mystruct s;
s.m1 = 1; s.m2 = 2;
]]
)],
[
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_ANONYMOUS_UNION_SUPPORT], [], [Compiler supports anonymous unions])
],
[AC_MSG_RESULT([no])]
)
saved_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS -Wl,--wrap=exit"

12
src/openvpn/mroute.h
View File

@ -96,17 +96,7 @@ struct mroute_addr {
uint8_t prefix[12];
in_addr_t addr; /* _network order_ IPv4 address */
} v4mappedv6;
}
#ifndef HAVE_ANONYMOUS_UNION_SUPPORT
/* Wrappers to support compilers that do not grok anonymous unions */
mroute_union
#define raw_addr mroute_union.raw_addr
#define ether mroute_union.ether
#define v4 mroute_union.v4
#define v6 mroute_union.v6
#define v4mappedv6 mroute_union.v4mappedv6
#endif
;
};
};
/* Double-check that struct packing works as expected */