[PATCH v2 nolibc 04/53] tools/nolibc: add libc-test binary

Paul E. McKenney
2023-06-12T20:47:41Z

This can be used to easily compare the behavior of nolibc to the system
libc.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
tools/testing/selftests/nolibc/.gitignore | 1 +
tools/testing/selftests/nolibc/Makefile | 6 ++++++
2 files changed, 7 insertions(+)

diff --git a/tools/testing/selftests/nolibc/.gitignore b/tools/testing/selftests/nolibc/.gitignore
index 4696df589d68..52f613cdad54 100644
--- a/tools/testing/selftests/nolibc/.gitignore
+++ b/tools/testing/selftests/nolibc/.gitignore
@@ -1,4 +1,5 @@
/initramfs/
+/libc-test
/nolibc-test
/run.out
/sysroot/
diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile
index bbce57420465..0cbe13809b37 100644
--- a/tools/testing/selftests/nolibc/Makefile
+++ b/tools/testing/selftests/nolibc/Makefile
@@ -94,6 +94,7 @@ help:
@echo " help this help"
@echo " sysroot create the nolibc sysroot here (uses \$$ARCH)"
@echo " nolibc-test build the executable (uses \$$CC and \$$CROSS_COMPILE)"
+ @echo " libc-test build an executable using the compiler's default libc instead"
@echo " run-user runs the executable under QEMU (uses \$$ARCH, \$$TEST)"
@echo " initramfs prepare the initramfs with nolibc-test"
@echo " defconfig create a fresh new default config (uses \$$ARCH)"
@@ -128,6 +129,9 @@ nolibc-test: nolibc-test.c sysroot/$(ARCH)/include
$(QUIET_CC)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ \
-nostdlib -static -Isysroot/$(ARCH)/include $< -lgcc

+libc-test: nolibc-test.c
+ $(QUIET_CC)$(CC) -o $@ $<
+
# qemu user-land test
run-user: nolibc-test
$(Q)qemu-$(QEMU_ARCH) ./nolibc-test > "$(CURDIR)/run.out" || :
@@ -159,6 +163,8 @@ clean:
$(Q)rm -rf sysroot
$(call QUIET_CLEAN, nolibc-test)
$(Q)rm -f nolibc-test
+ $(call QUIET_CLEAN, libc-test)
+ $(Q)rm -f libc-test
$(call QUIET_CLEAN, initramfs)
$(Q)rm -rf initramfs
$(call QUIET_CLEAN, run.out)
--
2.40.1