• der
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  • Registered: 2025-03-25
  • Posts: 1

Topic: Errors when cross compiling with GCC ARM

I am trying to cross compile for ARM architecture (-mcpu=cortex-a72) from my host x86_64 architecture. I have been following the build instructions for cross compiling. https://www.wolfssl.com/documentation/m … th-gcc-arm.

After I git clone and run ./autogen.sh I run the following ./configure command:

./configure --host=arm-non-eabi CC=arm-none-eabi-gcc AR=arm-none-eabi-ar STRIP=arm-none-eabi-strip RANLIB=arm-none-eabi-ranlib CFLAGS="-march=armv8-a --specs=nosys.specs -DHAVE_PK_CALLBACKS -DWOLFSSL_USER_IO -DNO_WRITEV" --disable-filesystem --enable-fastmath --disable-shared --enable-debug --enable-writedup --enable-lighty --disable-examples --enable-tls13 --enable-dtls13 --enable-dtls

where 

--enable-writedup --enable-lighty --disable-examples --enable-tls13 --enable-dtls13 --enable-dtls

are my own configuration additions.

Some changes that I hade made in the makefile.common is as follows:

TOOLCHAIN = /bin/arm-none-eabi-

# Architecture
ARCHFLAGS = -mcpu=cortex-a72 -mthumb -mabi=aapcs

# LD: Link with nosys
#LDFLAGS += --specs=nosys.specs

# LD: Link with nano or rdimon implementation for standard library
#LDFLAGS += --specs=nano.specs

# Memory Map
#SRC_LD = -T./linker.ld

This results in the the following error after running the ./configure command in the terminal.

.
.
config.status: executing wolfssl/wolfcrypt/port/intel/quickassist_mem.h commands
configure: ---
configure: Running make clean...
configure: ---
configure: Generating user options header...
checking for wolfssl/openssl/aes.h... no
configure: error: Header file inconsistency detected -- error including wolfssl/openssl/aes.h.
.
.

Although I run into this error a Makefile is still created. When I try running make, I get the following output in the terminal:

.
.
make[2]: warning: -j5 forced in submake: resetting jobserver mode.
  CC       wolfcrypt/benchmark/benchmark.o
  CC       wolfcrypt/src/src_libwolfssl_la-sp_int.lo
  CC       wolfcrypt/src/src_libwolfssl_la-wc_port.lo
  CC       wolfcrypt/src/src_libwolfssl_la-error.lo
  CC       wolfcrypt/src/src_libwolfssl_la-wc_encrypt.lo
wolfcrypt/benchmark/benchmark.c: In function 'current_time':
wolfcrypt/benchmark/benchmark.c:15023:27: error: implicit declaration of function 'clock_gettime'; did you mean 'wc_GetTime'? [-Werror=implicit-function-declaration]
15023 |         LIBCALL_CHECK_RET(clock_gettime(CLOCK_REALTIME, &tv));
      |                           ^~~~~~~~~~~~~
wolfcrypt/benchmark/benchmark.c:596:29: note: in definition of macro 'LIBCALL_CHECK_RET'
  596 |         int _libcall_ret = (__VA_ARGS__);                     \
      |                             ^~~~~~~~~~~
wolfcrypt/benchmark/benchmark.c:15023:27: error: nested extern declaration of 'clock_gettime' [-Werror=nested-externs]
15023 |         LIBCALL_CHECK_RET(clock_gettime(CLOCK_REALTIME, &tv));
      |                           ^~~~~~~~~~~~~
wolfcrypt/benchmark/benchmark.c:596:29: note: in definition of macro 'LIBCALL_CHECK_RET'
  596 |         int _libcall_ret = (__VA_ARGS__);                     \
      |                             ^~~~~~~~~~~
  CC       wolfcrypt/src/src_libwolfssl_la-signature.lo
In file included from ./wolfssl/openssl/ssl.h:39,
                 from ./wolfssl/openssl/dh.h:29,
                 from ./wolfssl/openssl/evp.h:51,
                 from wolfcrypt/src/wc_port.c:81:
./wolfssl/ssl.h:2104:13: error: unknown type name 'WOLFSSL_BIO_ADDR'
 2104 | WOLFSSL_API WOLFSSL_BIO_ADDR *wolfSSL_BIO_ADDR_new(void);
      |             ^~~~~~~~~~~~~~~~
./wolfssl/ssl.h:2105:40: error: unknown type name 'WOLFSSL_BIO_ADDR'; did you mean 'WOLFSSL_BY_DIR'?
 2105 | WOLFSSL_API void wolfSSL_BIO_ADDR_free(WOLFSSL_BIO_ADDR *addr);
      |                                        ^~~~~~~~~~~~~~~~
      |                                        WOLFSSL_BY_DIR
./wolfssl/ssl.h:2106:41: error: unknown type name 'WOLFSSL_BIO_ADDR'; did you mean 'WOLFSSL_BY_DIR'?
 2106 | WOLFSSL_API void wolfSSL_BIO_ADDR_clear(WOLFSSL_BIO_ADDR *addr);
      |                                         ^~~~~~~~~~~~~~~~
      |                                         WOLFSSL_BY_DIR
  CC       wolfcrypt/src/src_libwolfssl_la-wolfmath.lo
make[2]: *** [Makefile:8158: wolfcrypt/src/src_libwolfssl_la-wc_port.lo] Error 1
make[2]: *** Waiting for unfinished jobs....
cc1: all warnings being treated as errors
make[2]: *** [Makefile:7602: wolfcrypt/benchmark/benchmark.o] Error 1
.
.

When I run the 

./configure --enable-debug --enable-writedup --enable-lighty --disable-examples --enable-opensslextra --enable-tls13 --enable-dtls13 --enable-dtls

on my host, I am able to build everything successfully and run make without any errors.

I am unsure what I need to fix to get the ARM compilation working correctly.

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  • Registered: 2021-08-12
  • Posts: 128

Re: Errors when cross compiling with GCC ARM

Thanks for sending this to support@wolfssl.com.  We'll handle it there.

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