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