libutils: provide __sprintf_chk implementation

While building optee_test CXX test-cases natively on aarch64, OP-TEE
build relies on toolchain provided by buildroot. The buildroot toolchain
is built

libutils: provide __sprintf_chk implementation

While building optee_test CXX test-cases natively on aarch64, OP-TEE
build relies on toolchain provided by buildroot. The buildroot toolchain
is built with flag: -fstack-protector-strong which requires
__sprintf_chk symbol provided by standard glibc. For OP-TEE we use a
customized libc which leads to below error:

...
CC out/init.o
CC out/os_test.o
CC out/ta_entry.o
CXX out/cxx_tests.o
CC out/user_ta_header.o
CPP out/ta.lds
LD out/5b9e0e40-2636-11e1-ad9e-0002a5d5c51b.elf
/home/sumit/optee_br/build/../toolchains/aarch64/bin/aarch64-linux-ld.bfd: /home/sumit/optee_br/toolchains/aarch64/bin/../lib/gcc/aarch64-buildroot-linux-gnu/10.3.0/../../../../aarch64-buildroot-linux-gnu/lib/../lib64/libstdc++.a(cp-demangle.o): in function d_append_num': cp-demangle.c:(.text+0x830): undefined reference to __sprintf_chk'
...

Fix this issue by providing __sprintf_chk implementation.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Acked-by: Jerome Forissier <jerome@forissier.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>

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libutils: add sprintf()

Preparing for C++ support in TAs.

Implement sprintf() in libutils.

Signed-off-by: Jerome Forissier <jerome@forissier.org>
Acked-by: Etienne Carriere <etienne.carriere@linar

libutils: add sprintf()

Preparing for C++ support in TAs.

Implement sprintf() in libutils.

Signed-off-by: Jerome Forissier <jerome@forissier.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>

show more ...