Proper platform detection.

Use target instead of host.
Fix compilation for non win32 and non x86_64 platforms.

.gitignore

@@ -19,6 +19,8 @@ cpuminer-config.h*
 compile
 config.log
 config.status
+config.guess
+config.sub
 
 mingw32-config.cache
 

Makefile.am

@@ -20,8 +20,7 @@ minerd_SOURCES	= elist.h miner.h compat.h			\
 minerd_LDFLAGS	= $(PTHREAD_FLAGS)
 minerd_LDADD	= @LIBCURL@ @JANSSON_LIBS@ @PTHREAD_LIBS@
 
-if HAVE_WINDOWS
-else
+if HAVE_x86_64
 if HAS_YASM
 SUBDIRS		+= x86_64
 minerd_LDADD	+= x86_64/libx8664.a

configure.ac

@@ -1,6 +1,7 @@
 AC_INIT([cpuminer], [0.8.1])
 
 AC_PREREQ(2.52)
+AC_CANONICAL_SYSTEM
 AC_CONFIG_SRCDIR([cpu-miner.c])
 AM_INIT_AUTOMAKE([gnu])
 AC_CONFIG_HEADERS([cpuminer-config.h])
@@ -20,12 +21,19 @@ AC_CHECK_HEADERS(syslog.h)
 
 AC_FUNC_ALLOCA
 
-case $host in
+case $target in
   *-*-mingw*)
+    have_x86_64=false
     have_win32=true
     PTHREAD_FLAGS=""
     ;;
+  x86_64-*)
+    have_x86_64=true
+    have_win32=false
+    PTHREAD_FLAGS="-pthread"
+    ;;
   *)
+    have_x86_64=false
     have_win32=false
     PTHREAD_FLAGS="-pthread"
     ;;
@@ -37,6 +45,7 @@ AC_CHECK_LIB(pthread, pthread_create, PTHREAD_LIBS=-lpthread)
 
 AM_CONDITIONAL([WANT_JANSSON], [test x$request_jansson = xtrue])
 AM_CONDITIONAL([HAVE_WINDOWS], [test x$have_win32 = xtrue])
+AM_CONDITIONAL([HAVE_x86_64], [test x$have_x86_64 = xtrue])
 
 if test x$request_jansson = xtrue
 then