configure: check for program_invocation_name

For portabiliy, check for program_invocation_name during configure and
define HAVE_PROGRAM_INVOCATION_NAME accordingly. Use of this symbol is
now enclosed with the appropriate #ifdef block.

The symbol program_invocation_name is only used for error message
handling using error(), so it's safe to omit this if it is not
available.

configure.ac

@@ -137,6 +137,14 @@ dnl else
 dnl	ALL_LINGUAS="af am ar as be bg bn_IN bn ca cs cy da de el en_GB es et eu_ES fa fi fr gl gu he hi hr hu hy id is it ja ka kn ko ku lo lt lv mk ml mr ms my nb nl nn no nso or pa pl pt_BR pt ro ru si sk sl sq sr@Latn sr sv ta te th tr uk ur vi zh_CN zh_TW zu"
 dnl fi
 
+AC_MSG_CHECKING(whether program_invocation_name is defined)
+AC_TRY_COMPILE([#include <errno.h>],
+		[program_invocation_name = "test";],
+		AC_DEFINE(HAVE_PROGRAM_INVOCATION_NAME, 1,
+			[Define if program_invocation_name is defined])
+		AC_MSG_RESULT(yes),
+		AC_MSG_RESULT(no))
+
 AC_MSG_CHECKING(whether program_invocation_short_name is defined)
 AC_TRY_COMPILE([#include <errno.h>],
 		[program_invocation_short_name = "test";],

free.c

@@ -223,7 +223,9 @@ int main(int argc, char **argv)
 	args.repeat_interval = 1000000;
 	args.repeat_counter = 0;
 
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	setlocale (LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);

pgrep.c

@@ -832,7 +832,9 @@ int main (int argc, char **argv)
 	struct el *procs;
 	int num;
 
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	setlocale (LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);

pmap.c

@@ -1013,7 +1013,9 @@ int main(int argc, char **argv)
 		{NULL, 0, NULL, 0}
 	};
 
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	nls_initialize();
 	atexit(close_stdout);
 

pwdx.c

@@ -74,7 +74,9 @@ int main(int argc, char *argv[])
 		{NULL, 0, 0, 0}
 	};
 
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	setlocale (LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);

skill.c

@@ -629,7 +629,9 @@ static void skillsnice_parse(int argc,
 /* main body */
 int main(int argc, char ** argv)
 {
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	struct run_time_conf_t run_time;
 	memset(&run_time, 0, sizeof(struct run_time_conf_t));
 	my_pid = getpid();

slabtop.c

@@ -300,7 +300,9 @@ int main(int argc, char *argv[])
 		{  NULL, 0, NULL, 0 }
 	};
 
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	setlocale (LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);

sysctl.c

@@ -675,7 +675,9 @@ int main(int argc, char *argv[])
 		{NULL, 0, NULL, 0}
 	};
 
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	setlocale(LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);

tload.c

@@ -114,7 +114,9 @@ int main(int argc, char **argv)
 		{NULL, 0, NULL, 0}
 	};
  
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	setlocale (LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);

uptime.c

@@ -77,7 +77,9 @@ int main(int argc, char **argv)
 		{NULL, 0, NULL, 0}
 	};
 
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	setlocale (LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);

vmstat.c

@@ -724,7 +724,9 @@ int main(int argc, char *argv[])
 		{NULL, 0, NULL, 0}
 	};
 
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	setlocale (LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);

w.c

@@ -483,7 +483,9 @@ int main(int argc, char **argv)
 		{NULL, 0, NULL, 0}
 	};
 
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	setlocale (LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);

watch.c

@@ -590,7 +590,9 @@ int main(int argc, char *argv[])
 		{0, 0, 0, 0}
 	};
 
+#ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
+#endif
 	setlocale(LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);