build: added interface checking and nicer snprintf checking

use CHECK_CODE()

lib/replace/test/snprintf.c

@@ -0,0 +1,29 @@
+void foo(const char *format, ...)
+{
+	va_list ap;
+	int len;
+	char buf[20];
+	long long l = 1234567890;
+	l *= 100;
+
+	va_start(ap, format);
+	len = vsnprintf(buf, 0, format, ap);
+	va_end(ap);
+	if (len != 5) exit(1);
+
+	va_start(ap, format);
+	len = vsnprintf(0, 0, format, ap);
+	va_end(ap);
+	if (len != 5) exit(2);
+
+	if (snprintf(buf, 3, "hello") != 5 || strcmp(buf, "he") != 0) exit(3);
+
+	if (snprintf(buf, 20, "%lld", l) != 12 || strcmp(buf, "123456789000") != 0) exit(4);
+	if (snprintf(buf, 20, "%zu", 123456789) != 9 || strcmp(buf, "123456789") != 0) exit(5);
+	if (snprintf(buf, 20, "%2\$d %1\$d", 3, 4) != 3 || strcmp(buf, "4 3") != 0) exit(6);
+	if (snprintf(buf, 20, "%s", 0) < 3) exit(7);
+
+	printf("1");
+	exit(0);
+}
+main() { foo("hello"); }

lib/replace/wscript

@@ -119,7 +119,7 @@ def configure(conf):
     conf.CHECK_FUNCS('connect gethostbyname if_nametoindex socketpair')
     conf.CHECK_FUNCS('inet_ntoa inet_aton inet_ntop inet_pton')
     conf.CHECK_FUNCS('dirfd getdirentries getdents syslog getaddrinfo freeaddrinfo')
-    conf.CHECK_FUNCS('gai_strerror')
+    conf.CHECK_FUNCS('gai_strerror get_current_dir_name')
     conf.CHECK_FUNCS('timegm getifaddrs freeifaddrs mmap setgroups setsid')
     conf.CHECK_FUNCS('getgrent_r getgrgid_r getgrnam_r getgrouplist getpagesize')
     conf.CHECK_FUNCS('getpwent_r getpwnam_r getpwuid_r epoll_create')
@@ -161,47 +161,11 @@ def configure(conf):
 		msg="Checking for va_copy")
 
 
-    # we could also put code fragments like this in separate files,
+    conf.CHECK_CODE('#include "test/snprintf.c"',
-    # for example in test/snprintf.c
+                    define="HAVE_C99_VSNPRINTF",
-    conf.check_cc(fragment='''
+                    execute=1,
-#include <sys/types.h>
+                    addmain=False,
-#include <stdio.h>
+                    msg="Checking for C99 vsnprintf")
-#include <stdarg.h>
-#include <stdlib.h>
-void foo(const char *format, ...) {
-       va_list ap;
-       int len;
-       char buf[20];
-       long long l = 1234567890;
-       l *= 100;
-
-       va_start(ap, format);
-       len = vsnprintf(buf, 0, format, ap);
-       va_end(ap);
-       if (len != 5) exit(1);
-
-       va_start(ap, format);
-       len = vsnprintf(0, 0, format, ap);
-       va_end(ap);
-       if (len != 5) exit(2);
-
-       if (snprintf(buf, 3, "hello") != 5 || strcmp(buf, "he") != 0) exit(3);
-
-       if (snprintf(buf, 20, "%lld", l) != 12 || strcmp(buf, "123456789000") != 0) exit(4);
-       if (snprintf(buf, 20, "%zu", 123456789) != 9 || strcmp(buf, "123456789") != 0) exit(5);
-       if (snprintf(buf, 20, "%2\$d %1\$d", 3, 4) != 3 || strcmp(buf, "4 3") != 0) exit(6);
-       if (snprintf(buf, 20, "%s", 0) < 3) exit(7);
-
-       printf("1");
-       exit(0);
-}
-main() { foo("hello"); }
-''',
-                define_name="HAVE_C99_VSNPRINTF",
-		execute=1,
-                define_ret=1,
-                quote=0,
-		msg="Checking for C99 vsnprintf")
 
     if Options.options.developer:
         conf.ADD_CFLAGS('-Wall -g -Wfatal-errors -DDEVELOPER -W -Wshadow -Wstrict-prototypes -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Werror-implicit-function-declaration -Wformat=2 -Wno-format-y2k')
@@ -209,6 +173,27 @@ main() { foo("hello"); }
     conf.SAMBA_CONFIG_H()
     conf.SAMBA_BUILD_ENV()
 
+    # look for a method of finding the list of network interfaces
+    for method in ['HAVE_IFACE_GETIFADDRS', 'HAVE_IFACE_AIX', 'HAVE_IFACE_IFCONF', 'HAVE_IFACE_IFREQ']:
+        if conf.CHECK_CODE('''
+                           #define %s 1
+                           #define NO_CONFIG_H 1
+                           #define AUTOCONF_TEST 1
+                           #define SOCKET_WRAPPER_NOT_REPLACE
+                           #include "replace.c"
+                           #include "inet_ntop.c"
+                           #include "snprintf.c"
+                           #include "getifaddrs.c"
+                           #define getifaddrs_test main
+                           #include "test/getifaddrs.c"
+                           ''' % method,
+                           method,
+                           addmain=False,
+                           execute=True):
+            break
+
+
+
 def build(bld):
     bld.set_rpath()
 

lib/util/wscript_configure

@@ -11,4 +11,4 @@ conf.CHECK_FUNCS_IN('flistxattr', 'attr', checklibc=True)
 
 conf.CHECK_STRUCTURE_MEMBER('struct statvfs', 'f_frsize', define='HAVE_FRSIZE')
 
-conf.CHECK_CODE_COMPILES('gettimeofday(NULL, NULL)', 'HAVE_GETTIMEOFDAY_TZ')
+conf.CHECK_CODE('gettimeofday(NULL, NULL)', 'HAVE_GETTIMEOFDAY_TZ', execute=False)