* config.m4.in: Define ALIGNOF_UINT64_T (from configure).

* configure.ac: Check alignment of uint64_t, and also use AC_SUBST
for use in config.m4.in.

Rev: nettle/config.m4.in:1.2
Rev: nettle/configure.ac:1.48

config.m4.in

@@ -3,6 +3,7 @@ define(<C_NAME>, <@ASM_SYMBOL_PREFIX@><$1>)dnl
 define(<ELF_STYLE>, <@ASM_ELF_STYLE@>)dnl
 define(<TYPE_FUNCTION>, <@ASM_TYPE_FUNCTION@>)dnl
 define(<ALIGN_LOG>, <@ASM_ALIGN_LOG@>)dnl
+define(<ALIGNOF_UINT64_T>, <@ALIGNOF_UINT64_T@>)dnl
 divert(1)
 @ASM_MARK_NOEXEC_STACK@
 divert

configure.ac

@@ -479,6 +479,10 @@ AC_TYPE_UID_T
 AC_TYPE_SIZE_T
 AC_HEADER_TIME
 AC_CHECK_SIZEOF(long)
+AC_CHECK_ALIGNOF(uint64_t)
+
+ALIGNOF_UINT64_T="$ac_cv_alignof_uint64_t"
+AC_SUBST(ALIGNOF_UINT64_T)
 
 AC_CHECK_HEADERS([openssl/blowfish.h openssl/des.h openssl/cast.h openssl/aes.h],,
 [enable_openssl=no