+AM_CONDITIONAL(SILC_NO_CPU_OPTIMIZATIONS,
+ test x$want_cpu_optimizations = xfalse)
+
+SILC_SYSTEM_IS_SMP(AC_DEFINE([SILC_SMP], [], [SILC_SMP]), [],
+ AC_DEFINE([SILC_SMP], [], [SILC_SMP]))
+cpu_i386=false
+cpu_i486=false
+cpu_i586=false
+cpu_i686=false
+cpu_i786=false
+cpu_x86_64=false
+cpu_ppc=false
+cpu_ia64=false
+case "$host_cpu" in
+ # All following Intels are considered 32-bit CPUs.
+ i?86)
+ # All CPUs of today are considered i386 and i486 compatible */
+ cpu_i386=true
+ cpu_i486=true
+
+ if test "x$host_cpu" = "xi586"; then
+ cpu_i586=true
+ fi
+
+ if test "x$host_cpu" = "xi686"; then
+ cpu_i586=true
+ cpu_i686=true
+ fi
+
+ if test "x$host_cpu" = "xi786"; then
+ cpu_i586=true
+ cpu_i686=true
+ cpu_i786=true
+ fi
+
+ # Check for specific CPU features
+ SILC_CPU_FLAG(mmx, true, AC_DEFINE([SILC_CPU_MMX], [], [SILC_CPU_MMX]), [])
+ SILC_CPU_FLAG(sse2, true, AC_DEFINE([SILC_CPU_SSE2], [], [SILC_CPU_SSE2]), [])
+ SILC_CPU_FLAG(pni, true, AC_DEFINE([SILC_CPU_SSE3], [], [SILC_CPU_SSE3]), [])
+ SILC_CPU_FLAG(ssse3, true, AC_DEFINE([SILC_CPU_SSSE3], [], [SILC_CPU_SSSE3]), [])
+ SILC_CPU_FLAG(sse4a, true, AC_DEFINE([SILC_CPU_SSE4A], [], [SILC_CPU_SSE4A]), [])
+ SILC_CPU_FLAG(sse4_1, true, AC_DEFINE([SILC_CPU_SSE41], [], [SILC_CPU_SSE41]), [])
+ SILC_CPU_FLAG(sse4_2, true, AC_DEFINE([SILC_CPU_SSE42], [], [SILC_CPU_SSE42]), [])
+ SILC_CPU_FLAG(sse5, true, AC_DEFINE([SILC_CPU_SSE5], [], [SILC_CPU_SSE5]), [])
+ ;;
+
+ # Intel IA-64, 64-bit CPU (not x86_64 compatible)
+ ia64)
+ AC_DEFINE([SILC_IA64], [], [SILC_IA64])
+ cpu_ia64=true
+ ;;
+
+ # AMD/Intel x86_64, 64-bit CPU
+ x86_64)
+ cpu_x86_64=true
+
+ # Check for specific CPU features
+ SILC_CPU_FLAG(mmx, true, AC_DEFINE([SILC_CPU_MMX], [], [SILC_CPU_MMX]), [])
+ SILC_CPU_FLAG(sse2, true, AC_DEFINE([SILC_CPU_SSE2], [], [SILC_CPU_SSE2]), [])
+ SILC_CPU_FLAG(pni, true, AC_DEFINE([SILC_CPU_SSE3], [], [SILC_CPU_SSE3]), [])
+ SILC_CPU_FLAG(ssse3, true, AC_DEFINE([SILC_CPU_SSSE3], [], [SILC_CPU_SSSE3]), [])
+ SILC_CPU_FLAG(sse4a, true, AC_DEFINE([SILC_CPU_SSE4A], [], [SILC_CPU_SSE4A]), [])
+ SILC_CPU_FLAG(sse4_1, true, AC_DEFINE([SILC_CPU_SSE41], [], [SILC_CPU_SSE41]), [])
+ SILC_CPU_FLAG(sse4_2, true, AC_DEFINE([SILC_CPU_SSE42], [], [SILC_CPU_SSE42]), [])
+ SILC_CPU_FLAG(sse5, true, AC_DEFINE([SILC_CPU_SSE5], [], [SILC_CPU_SSE5]), [])
+ ;;
+
+ # PowerPC, 32-bit and 64-bit CPUs
+ powerpc*)
+ cpu_ppc=true
+ ;;
+esac
+AM_CONDITIONAL(SILC_I386, test x$cpu_i386 = xtrue)
+AM_CONDITIONAL(SILC_I486, test x$cpu_i486 = xtrue)
+AM_CONDITIONAL(SILC_I586, test x$cpu_i586 = xtrue)
+AM_CONDITIONAL(SILC_I686, test x$cpu_i686 = xtrue)
+AM_CONDITIONAL(SILC_7686, test x$cpu_i786 = xtrue)
+AM_CONDITIONAL(SILC_X86_64, test x$cpu_x86_64 = xtrue)
+AM_CONDITIONAL(SILC_POWERPC, test x$cpu_ppc = xtrue)
+AM_CONDITIONAL(SILC_IA64, test x$cpu_ia64 = xtrue)
+
+if test x$want_cpu_optimizations = xtrue; then
+ # Set some compiler options based on CPU
+ if test "x$CC" = "xicc"; then
+ # ICC flags
+ if test x$x_have_cpu_sse4_1 = xtrue; then
+ SILC_ADD_CFLAGS(-axS)
+ fi
+ if test x$x_have_cpu_sse4_2 = xtrue; then
+ SILC_ADD_CFLAGS(-axS)
+ fi
+ if test x$x_have_cpu_ssse3 = xtrue; then
+ SILC_ADD_CFLAGS(-axT)
+ elif test x$x_have_cpu_pni = xtrue; then
+ SILC_ADD_CFLAGS(-axP)
+ elif test x$x_have_cpu_sse2 = xtrue; then
+ SILC_ADD_CFLAGS(-axW)
+ fi
+ else
+ # Other compilers
+ if test x$x_have_cpu_sse2 = xtrue; then
+ SILC_ADD_CFLAGS(-msse2)
+ fi
+ if test x$x_have_cpu_pni = xtrue; then
+ SILC_ADD_CFLAGS(-msse3)
+ fi
+ if test x$x_have_cpu_ssse3 = xtrue; then
+ SILC_ADD_CFLAGS(-mssse3)
+ fi
+ if test x$x_have_cpu_sse4_1 = xtrue; then
+ SILC_ADD_CFLAGS(-msse4)
+ fi
+ if test x$x_have_cpu_sse4_2 = xtrue; then
+ SILC_ADD_CFLAGS(-msse4)
+ fi
+ fi
+fi
+
+
+##
+## Put here any platform specific stuff
+##
+
+case "$target" in
+ *-*-linux*)
+ CFLAGS=`echo $CFLAGS -D_GNU_SOURCE`
+ ;;
+ *-*-freebsd*)
+ ;;
+ *-*-netbsd*)
+ ;;
+ *-*-*bsd*)
+ ;;
+ *)
+ ;;
+esac
+
+
+##
+## Header checking
+##
+AC_HEADER_STDC
+
+# More header checking
+#
+AC_CHECK_HEADERS(unistd.h assert.h time.h fcntl.h)
+AC_CHECK_HEADERS(sys/types.h sys/times.h sys/time.h sys/resource.h)
+
+# Check for big-endian machines
+AC_C_BIGENDIAN
+