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-rwxr-xr-xcommon/m4/gst-arch.m4123
1 files changed, 123 insertions, 0 deletions
diff --git a/common/m4/gst-arch.m4 b/common/m4/gst-arch.m4
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+++ b/common/m4/gst-arch.m4
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+dnl AG_GST_ARCH
+dnl sets up defines and automake conditionals for host architecture
+dnl checks endianness
+dnl defines HOST_CPU
+
+AC_DEFUN([AG_GST_ARCH],
+[
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl we use host_ variables
+
+ dnl Determine CPU
+ case "x${host_cpu}" in
+ xi?86 | xk? | xi?86_64)
+ HAVE_CPU_I386=yes
+ AC_DEFINE(HAVE_CPU_I386, 1, [Define if the host CPU is an x86])
+
+ dnl FIXME could use some better detection
+ dnl (ie CPUID)
+ case "x${host_cpu}" in
+ xi386 | xi486) ;;
+ *)
+ AC_DEFINE(HAVE_RDTSC, 1, [Define if RDTSC is available]) ;;
+ esac ;;
+ xpowerpc)
+ HAVE_CPU_PPC=yes
+ AC_DEFINE(HAVE_CPU_PPC, 1, [Define if the host CPU is a PowerPC]) ;;
+ xpowerpc64)
+ HAVE_CPU_PPC64=yes
+ AC_DEFINE(HAVE_CPU_PPC64, 1, [Define if the host CPU is a 64 bit PowerPC]) ;;
+ xalpha*)
+ HAVE_CPU_ALPHA=yes
+ AC_DEFINE(HAVE_CPU_ALPHA, 1, [Define if the host CPU is an Alpha]) ;;
+ xarm*)
+ HAVE_CPU_ARM=yes
+ AC_DEFINE(HAVE_CPU_ARM, 1, [Define if the host CPU is an ARM]) ;;
+ xsparc*)
+ HAVE_CPU_SPARC=yes
+ AC_DEFINE(HAVE_CPU_SPARC, 1, [Define if the host CPU is a SPARC]) ;;
+ xmips*)
+ HAVE_CPU_MIPS=yes
+ AC_DEFINE(HAVE_CPU_MIPS, 1, [Define if the host CPU is a MIPS]) ;;
+ xhppa*)
+ HAVE_CPU_HPPA=yes
+ AC_DEFINE(HAVE_CPU_HPPA, 1, [Define if the host CPU is a HPPA]) ;;
+ xs390*)
+ HAVE_CPU_S390=yes
+ AC_DEFINE(HAVE_CPU_S390, 1, [Define if the host CPU is a S390]) ;;
+ xia64*)
+ HAVE_CPU_IA64=yes
+ AC_DEFINE(HAVE_CPU_IA64, 1, [Define if the host CPU is a IA64]) ;;
+ xm68k*)
+ HAVE_CPU_M68K=yes
+ AC_DEFINE(HAVE_CPU_M68K, 1, [Define if the host CPU is a M68K]) ;;
+ xx86_64)
+ HAVE_CPU_X86_64=yes
+ AC_DEFINE(HAVE_CPU_X86_64, 1, [Define if the host CPU is a x86_64]) ;;
+ xcris)
+ HAVE_CPU_CRIS=yes
+ AC_DEFINE(HAVE_CPU_CRIS, 1, [Define if the host CPU is a CRIS]) ;;
+ xcrisv32)
+ HAVE_CPU_CRISV32=yes
+ AC_DEFINE(HAVE_CPU_CRISV32, 1, [Define if the host CPU is a CRISv32]) ;;
+ esac
+
+ dnl Determine endianness
+ AC_C_BIGENDIAN
+
+ AM_CONDITIONAL(HAVE_CPU_I386, test "x$HAVE_CPU_I386" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_PPC, test "x$HAVE_CPU_PPC" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_PPC64, test "x$HAVE_CPU_PPC64" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_ALPHA, test "x$HAVE_CPU_ALPHA" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_ARM, test "x$HAVE_CPU_ARM" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_SPARC, test "x$HAVE_CPU_SPARC" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_HPPA, test "x$HAVE_CPU_HPPA" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_MIPS, test "x$HAVE_CPU_MIPS" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_S390, test "x$HAVE_CPU_S390" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_IA64, test "x$HAVE_CPU_IA64" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_M68K, test "x$HAVE_CPU_M68K" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_X86_64, test "x$HAVE_CPU_X86_64" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_CRIS, test "x$HAVE_CPU_CRIS" = "xyes")
+ AM_CONDITIONAL(HAVE_CPU_CRISV32, test "x$HAVE_CPU_CRISV32" = "xyes")
+
+ AC_DEFINE_UNQUOTED(HOST_CPU, "$host_cpu", [the host CPU])
+])
+
+dnl check if unaligned memory access works correctly
+AC_DEFUN([AG_GST_UNALIGNED_ACCESS], [
+ AC_MSG_CHECKING([if unaligned memory access works correctly])
+ if test x"$as_cv_unaligned_access" = x ; then
+ case $host in
+ alpha*|arm*|hp*|mips*|sh*|sparc*|ia64*)
+ _AS_ECHO_N([(blacklisted) ])
+ as_cv_unaligned_access=no
+ ;;
+ i?86*|powerpc*|m68k*|cris*)
+ _AS_ECHO_N([(whitelisted) ])
+ as_cv_unaligned_access=yes
+ ;;
+ esac
+ else
+ _AS_ECHO_N([(cached) ])
+ fi
+ if test x"$as_cv_unaligned_access" = x ; then
+ AC_TRY_RUN([
+int main(int argc, char **argv)
+{
+ char array[] = "ABCDEFGH";
+ unsigned int iarray[2];
+ memcpy(iarray,array,8);
+#define GET(x) (*(unsigned int *)((char *)iarray + (x)))
+ if(GET(0) != 0x41424344 && GET(0) != 0x44434241) return 1;
+ if(GET(1) != 0x42434445 && GET(1) != 0x45444342) return 1;
+ if(GET(2) != 0x43444546 && GET(2) != 0x46454443) return 1;
+ if(GET(3) != 0x44454647 && GET(3) != 0x47464544) return 1;
+ return 0;
+}
+ ], as_cv_unaligned_access="yes", as_cv_unaligned_access="no")
+ fi
+ AC_MSG_RESULT($as_cv_unaligned_access)
+ if test "$as_cv_unaligned_access" = "yes"; then
+ AC_DEFINE_UNQUOTED(HAVE_UNALIGNED_ACCESS, 1,
+ [defined if unaligned memory access works correctly])
+ fi
+])