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[PATCH libX11] configure: check if issetugid is declared

GNU/kFreeBSD has issetugid in libc (for legacy apps?), but doesn't
declare it anywhere, causing gcc to error out with
-Werror=implicit-function-declaration.  Use AC_CHECK_DECL in addition to
AC_CHECK_FUNC so we disable this code instead of failing to build it.

Debian bug#669670 <http://bugs.debian.org/669670>

Signed-off-by: Julien Cristau <jcristau@debian.org>
 configure.ac |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index aaec968..c91234f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -223,8 +223,9 @@ AC_CHECK_HEADERS([sys/select.h])
 AC_CHECK_FUNCS([strtol seteuid])
 # Used in lcFile.c (see also --enable-xlocaledir settings below)
-AC_CHECK_FUNC([issetugid], [XLOCALEDIR_IS_SAFE="yes"]
-	AC_DEFINE(HASSETUGID,1,[Has issetugid() function]))
+	AC_CHECK_FUNC([issetugid], [XLOCALEDIR_IS_SAFE="yes"]
+		AC_DEFINE(HASSETUGID,1,[Has issetugid() function])))
 AC_CHECK_FUNC([getresuid], [XLOCALEDIR_IS_SAFE="yes"]
 	AC_DEFINE(HASGETRESUID,1,[Has getresuid() & getresgid() functions]))
 # Used in Font.c

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