Correct almost all compiler warning issues

plugins/checksum/checksum.c

@@ -170,22 +170,24 @@ dccrecv_cb (char *word[], void *userdata)
 	int result;
 	struct stat buffer;									/* buffer for storing file info */
 	char sum[65];											/* buffer for checksum */
-	char *file;
+	const char *file;
+	char *cfile;
+
 	if (hexchat_get_prefs (ph, "dcc_completed_dir", &file, NULL) == 1 && file[0] != 0)
 	{
-		file = g_strconcat (file, G_DIR_SEPARATOR_S, word[1], NULL);
+		cfile = g_strconcat (file, G_DIR_SEPARATOR_S, word[1], NULL);
 	}
 	else
 	{
-		file = g_strdup(word[2]);
+		cfile = g_strdup(word[2]);
 	}
 
-	result = stat (file, &buffer);
+	result = stat (cfile, &buffer);
 	if (result == 0)										/* stat returns 0 on success */
 	{
 		if (buffer.st_size <= (unsigned long long) get_limit () * 1048576)
 		{
-			sha256_file (file, sum);						/* file is the full filename even if completed dir set */
+			sha256_file (cfile, sum);						/* file is the full filename even if completed dir set */
 			/* try to print the checksum in the privmsg tab of the sender */
 			hexchat_set_context (ph, hexchat_find_context (ph, NULL, word[3]));
 			hexchat_printf (ph, "SHA-256 checksum for %s (local):  %s\n", word[1], sum);
@@ -201,7 +203,7 @@ dccrecv_cb (char *word[], void *userdata)
 		hexchat_printf (ph, "File access error!\n");
 	}
 
-	g_free (file);
+	g_free (cfile);
 	return HEXCHAT_EAT_NONE;
 }
 

plugins/python/python.c

@@ -66,6 +66,7 @@
 #endif
 
 #include "hexchat-plugin.h"
+#undef _POSIX_C_SOURCE	/* Avoid warning: also in /usr/include/features.hfrom glib.h */
 #include "Python.h"
 #include "structmember.h"
 #include "pythread.h"

plugins/sysinfo/parse.c

@@ -37,9 +37,13 @@
 
 int xs_parse_cpu(char *model, char *vendor, double *freq, char *cache, unsigned int *count)
 {
-	char buffer[bsize], *pos;
+#if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__) || defined(__alpha__) || defined(__ia64__) || defined(__parisc__) || defined(__sparc__)
+	char buffer[bsize];
+#endif
+#if defined(__powerpc__)
+	char *pos = NULL;
+#endif
 	FILE *fp = fopen("/proc/cpuinfo", "r");
-	pos = NULL;
 	if(fp == NULL)
 		return 1;
 	if(count != NULL) *count = 0;