tests/tcg: provide a minilib for system tests

We will likely want a few common functions to make up for the fact we
don't have a libc and we don't want to feel like we are programming by
banging rocks together.

I've purloined the printf function from:

  https://git.virtualopensystems.com/dev/tcg_baremetal_tests

Although I have tweaked the names to avoid confusing GCC about clashing
with builtins.

Cc: Alexander Spyridakis <a.spyridakis@virtualopensystems.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/tcg/minilib/Makefile.target b/tests/tcg/minilib/Makefile.target
new file mode 100644
index 0000000000..3ed8077d0f
--- /dev/null
+++ b/tests/tcg/minilib/Makefile.target
@@ -0,0 +1,21 @@
+#
+# System test minilib objects
+#
+# The system tests are very constrained in terms of the library they
+# support but we are not savages. We provide a few helpful routines
+# that can be shared with the tests for basic I/O.
+#
+# They assume each arch has provided a putc function.
+#
+
+SYSTEM_MINILIB_SRC=$(SRC_PATH)/tests/tcg/minilib
+MINILIB_SRCS=$(wildcard $(SYSTEM_MINILIB_SRC)/*.c)
+MINILIB_OBJS=$(patsubst $(SYSTEM_MINILIB_SRC)/%.c, %.o, $(MINILIB_SRCS))
+
+MINILIB_CFLAGS+=-nostdlib -ggdb -O0
+MINILIB_INC=-isystem $(SYSTEM_MINILIB_SRC)
+
+.PRECIOUS: $(MINILIB_OBJS)
+
+%.o: $(SYSTEM_MINILIB_SRC)/%.c
+	$(CC) $(CFLAGS) -c $< -o $@