Import FPGA I/O code from core/platform/novena/sw, add minimal

autoconf, whack with a club until it builds.

1 files changed, 43 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..43db468
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,43 @@
+# -*- Autoconf -*-
+
+# Bare-minimum autoconf, with as little of the usual voodoo as
+# possible.  This probably ought to be replaced by a ten-line Python
+# script, some day when we have time to shave that yak.
+#
+# We deliberately avoid constructs like AC_PROG_CC because they're
+# almost certain to guess wrong about the settings we want.
+#
+# If you don't understand why there are so many square brackets, put
+# the keyboard down and back away slowly before somebody gets hurt.
+
+AC_INIT([libcryptech], [0.1])
+
+AC_ARG_VAR([FPGA_BUS],	[Bus architecture to use (currently must be "EIM" or "I2C")])
+AC_ARG_VAR([CC],	[C compiler command])
+AC_ARG_VAR([CFLAGS],	[C compiler flags])
+AC_ARG_VAR([LDFLAGS],	[Linker flags])
+
+AS_CASE($FPGA_BUS,
+	[""],[FPGA_BUS=EIM],
+	[EIM|I2C],[],
+	[AC_MSG_ERROR([Invalid setting of FPGA_BUS, must be "EIM" or "I2C"])])
+
+AS_CASE($CC,
+	[""],[CC="cc"],
+	[])
+	
+AS_CASE($CFLAGS,
+	[""],[CFLAGS="-g -Wall -fPIC"],
+	[])
+	
+AS_CASE($LDFLAGS,
+	[""],[LDFLAGS="-g"],
+	[])
+	
+AC_MSG_NOTICE([FPGA bus: $FPGA_BUS])
+AC_MSG_NOTICE([C compiler: $CC])
+AC_MSG_NOTICE([C compiler flags: $CFLAGS])
+AC_MSG_NOTICE([Linker flags: $LDFLAGS])
+
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT