Build errors on macOS

[neilalexander]

A number of build errors occur when trying to build wpantund on macOS 11.4, Xcode 12.5. In this case, it's on commit bf45115f41ba2b8029eda174be2b93dea73b9261.

Some of the errors are related to string handling:

In file included from wpantund.cpp:45:
../../src/util/string-utils.h:64:9: error: use of undeclared identifier 'strncasecmp'
        return strncaseequal(str, prefix, strlen(prefix));

wpantund.cpp:323:6: error: use of undeclared identifier 'strcasecmp'
        if (strcaseequal(key, kWPANTUNDProperty_ConfigNCPSocketBaud)) {
            ^
../../src/util/string-utils.h:33:31: note: expanded from macro 'strcaseequal'
#define strcaseequal(x, y)   (strcasecmp(x, y) == 0)
                              ^
wpantund.cpp:330:13: error: use of undeclared identifier 'strcasecmp'
        } else if (strcaseequal(key, kWPANTUNDProperty_ConfigDaemonPrivDropToUser)) {
                   ^
../../src/util/string-utils.h:33:31: note: expanded from macro 'strcaseequal'
#define strcaseequal(x, y)   (strcasecmp(x, y) == 0)
                              ^
wpantund.cpp:338:13: error: use of undeclared identifier 'strcasecmp'
        } else if (strcaseequal(key, kWPANTUNDProperty_DaemonSyslogMask)) {
                   ^
../../src/util/string-utils.h:33:31: note: expanded from macro 'strcaseequal'
#define strcaseequal(x, y)   (strcasecmp(x, y) == 0)
                              ^
wpantund.cpp:341:13: error: use of undeclared identifier 'strcasecmp'
        } else if (strcaseequal(key, kWPANTUNDProperty_ConfigDaemonChroot)) {
                   ^
../../src/util/string-utils.h:33:31: note: expanded from macro 'strcaseequal'
#define strcaseequal(x, y)   (strcasecmp(x, y) == 0)
                              ^
wpantund.cpp:348:13: error: use of undeclared identifier 'strcasecmp'
        } else if (strcaseequal(key, kWPANTUNDProperty_ConfigDaemonPIDFile)) {
                   ^
../../src/util/string-utils.h:33:31: note: expanded from macro 'strcaseequal'
#define strcaseequal(x, y)   (strcasecmp(x, y) == 0)

... and these above errors are largely fixed by adding the below into src/util/string-utils.h:

#ifdef __APPLE__
#include <strings.h>
#endif

... but a number of other errors remain:

wpantund.cpp:172:8: error: unknown type name 'sig_t'
static sig_t gPreviousHandlerForSIGINT;
       ^
wpantund.cpp:173:8: error: unknown type name 'sig_t'
static sig_t gPreviousHandlerForSIGTERM;
       ^
wpantund.cpp:253:69: error: use of undeclared identifier 'strsignal'
        fprintf(stderr, " *** FATAL ERROR: Caught signal %d (%s):\n", sig, strsignal(sig));
                                                                           ^
wpantund.cpp:293:68: error: use of undeclared identifier 'strsignal'
        syslog(LOG_CRIT, " *** FATAL ERROR: Caught signal %d (%s):", sig, strsignal(sig));
                                                                          ^
wpantund.cpp:603:4: error: use of undeclared identifier 'getloadavg'
                        getloadavg(loadavg, 3);
                        ^
wpantund.cpp:938:8: error: use of undeclared identifier 'chroot'
                        if (chroot(gChroot) != 0) {

[abtink]

@neilalexander wpantund on mac OS has been experimental and never fully supported and/or tested. Even if you can build it successfully I would advice against using it on mac OS in general. I am aware of some missing features/behaviors, e.g., around netif address management (there may be more).

[jwhui]

Closing stale issue.

[Ja5onHoffman]

@neilalexander Wondering if you were able to solve this. Same problem.