ztests: Enable native specific functionality with embedded libCs

When building with the native simulator instead of attempting to
call directly to the host libC, use the trampolines provided
by the runner.
In this way we can build this code even if we are building
Zephyr with an embedded C library.

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>

subsys/testsuite/ztest/CMakeLists.txt

@@ -24,7 +24,7 @@ zephyr_library_sources_ifdef(CONFIG_ZTEST_MOCKING src/ztest_mock.c)
 zephyr_library_sources_ifdef(CONFIG_ZTRESS src/ztress.c)
 
 
-if(CONFIG_ARCH_POSIX AND CONFIG_EXTERNAL_LIBC)
+if(CONFIG_ARCH_POSIX)
  zephyr_library_sources_ifdef(CONFIG_ZTEST_NEW_API src/ztest_posix.c)
 else()
  zephyr_library_sources_ifdef(CONFIG_ZTEST_NEW_API src/ztest_defaults.c)

subsys/testsuite/ztest/src/ztest_posix.c

@@ -6,11 +6,11 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <unistd.h>
 #include "cmdline.h" /* native_posix command line options header */
 #include "soc.h"
 #include <zephyr/tc_util.h>
 #include <zephyr/ztest_test_new.h>
+#include "nsi_host_trampolines.h"
 
 static const char *test_args;
 static bool list_tests;
@@ -57,7 +57,7 @@ const char *ztest_relative_filename(const char *file)
  const char *cwd;
  char buf[200];
 
- cwd = getcwd(buf, sizeof(buf));
+ cwd = nsi_host_getcwd(buf, sizeof(buf));
  if (cwd && strlen(file) > strlen(cwd) && !strncmp(file, cwd, strlen(cwd))) {
  return file + strlen(cwd) + 1; /* move past the trailing '/' */
  }
@@ -146,7 +146,7 @@ void z_ztest_run_all(const void *state)
 static bool z_ztest_testargs_contains(const char *suite_name, const char *test_name)
 {
  bool found = false;
- char *test_args_local = strdup(test_args);
+ char *test_args_local = nsi_host_strdup(test_args);
  char *suite_test_pair;
  char *last_suite_test_pair;
  char *suite_arg;
@@ -168,7 +168,7 @@ static bool z_ztest_testargs_contains(const char *suite_name, const char *test_n
  suite_test_pair = strtok_r(NULL, ",", &last_suite_test_pair);
  }
 
- free(test_args_local);
+ nsi_host_free(test_args_local);
  return found;
 }