csound: fix build w/ gcc-8.2.0

Signed-off-by: Jürgen Buchmüller <pullmoll@t-online.de>

srcpkgs/csound/patches/buffersize.patch

@@ -9,3 +9,30 @@
      int32_t j = 0;
      int32_t len = 8192;
      while (*fmt) {
+--- Engine/csound_orc_expressions.c.orig	2018-09-24 19:09:36.956995269 +0200
++++ Engine/csound_orc_expressions.c	2018-09-24 19:11:09.401989759 +0200
+@@ -826,10 +826,10 @@
+ 
+ static TREE *create_synthetic_ident(CSOUND *csound, int32 count)
+ {
+-    char *label = (char *)csound->Calloc(csound, 20);
++    char *label = (char *)csound->Calloc(csound, 32);
+     ORCTOKEN *token;
+ 
+-    snprintf(label, 20, "__synthetic_%"PRIi32, count);
++    snprintf(label, 32, "__synthetic_%"PRIi32, count);
+     if (UNLIKELY(PARSER_DEBUG))
+       csound->Message(csound, "Creating Synthetic T_IDENT: %s\n", label);
+     token = make_token(csound, label);
+@@ -840,9 +840,9 @@
+ 
+ static TREE *create_synthetic_label(CSOUND *csound, int32 count)
+ {
+-    char *label = (char *)csound->Calloc(csound, 20);
++    char *label = (char *)csound->Calloc(csound, 32);
+     ORCTOKEN *token;
+-    snprintf(label, 20, "__synthetic_%"PRIi32":", count);
++    snprintf(label, 32, "__synthetic_%"PRIi32":", count);
+     if (UNLIKELY(PARSER_DEBUG))
+       csound->Message(csound, "Creating Synthetic label: %s\n", label);
+     token = make_label(csound, label);

srcpkgs/csound/patches/replace-sprintf.patch

@@ -0,0 +1,89 @@
+Source: written by @pullmoll
+Upstream: n/a
+Reason: replace legacy sprintf with snprintf to avoid buffer overruns and fix gcc-8 warnings/errors.
+
+--- OOps/schedule.c.orig	2018-09-24 18:54:29.373049365 +0200
++++ OOps/schedule.c	2018-09-24 19:04:41.067012905 +0200
+@@ -56,22 +56,27 @@
+     return eventOpcodeI_(csound, &pp, 0, 'i');
+ }
+ 
+-static void add_string_arg(char *s, const char *arg) {
+-  int32_t offs = strlen(s) ;
+-  //char *c = s;
+-  s += offs;
+-  *s++ = ' ';
+-
+-  *s++ ='\"';
+-  while(*arg != '\0') {
+-    if(*arg == '\"')
+-      *s++ = '\\';
+-    *s++ = *arg++;
++static void add_string_arg(char *s, size_t size, const char *arg) {
++  size_t offs = strlen(s);
++  size_t len;
++  len = snprintf(s + offs, size - offs, " \"");
++  if (len <= 0)
++    return;
++  offs += len;
++  while (*arg != '\0') {
++    if (*arg == '\"') {
++      len = snprintf(s + offs, size - offs, "\\");
++      if (len <= 0)
++        return;
++      offs += len;
++    }
++    len = snprintf(s + offs, size - offs, "%c", *arg);
++    if (len <= 0)
++      return;
++    offs += len;
++    arg++;
+   }
+-
+-  *s++ = '\"';
+-  *s = '\0';
+-  //printf("%s \n", c);
++  snprintf(s + offs, size - offs, "\"");
+ }
+ 
+ 
+@@ -79,15 +84,16 @@
+ {
+     int32_t i;
+     int32_t argno = p->INOCOUNT+1;
++    size_t len;
+     char s[16384];
+-    sprintf(s, "i %f %f %f", *p->which, *p->when, *p->dur);
++    len = snprintf(s, sizeof(s), "i %f %f %f", *p->which, *p->when, *p->dur);
+     for (i=4; i < argno ; i++) {
+        MYFLT *arg = p->argums[i-4];
+        if (csoundGetTypeForArg(arg) == &CS_VAR_TYPE_S) {
+-           add_string_arg(s, ((STRINGDAT *)arg)->data);
+-           //sprintf(s, "%s \"%s\" ", s, ((STRINGDAT *)arg)->data);
++           add_string_arg(s, sizeof(s), ((STRINGDAT *)arg)->data);
++           //snprintf(s, sizeof(s), "%s \"%s\" ", s, ((STRINGDAT *)arg)->data);
+        }
+-       else sprintf(s, "%s %f", s,  *arg);
++       else snprintf(s + len, sizeof(s) - len, " %f", *arg);
+ 
+     }
+ 
+@@ -99,14 +105,14 @@
+ {
+     int32_t i;
+     int32_t argno = p->INOCOUNT+1;
++    size_t len;
+     char s[16384];
+-    sprintf(s, "i \"%s\" %f %f", ((STRINGDAT *)p->which)->data, *p->when, *p->dur);
++    len = snprintf(s, sizeof(s), "i \"%s\" %f %f", ((STRINGDAT *)p->which)->data, *p->when, *p->dur);
+     for (i=4; i < argno ; i++) {
+        MYFLT *arg = p->argums[i-4];
+          if (csoundGetTypeForArg(arg) == &CS_VAR_TYPE_S)
+-           //sprintf(s, "%s \"%s\" ", s, ((STRINGDAT *)arg)->data);
+-           add_string_arg(s, ((STRINGDAT *)arg)->data);
+-         else sprintf(s, "%s %f", s,  *arg);
++           add_string_arg(s, sizeof(s), ((STRINGDAT *)arg)->data);
++         else snprintf(s + len, sizeof(s) - len, " %f", *arg);
+     }
+     //printf("%s\n", s);
+     csoundInputMessageInternal(csound, s);

srcpkgs/csound/template

@@ -19,6 +19,8 @@ distfiles="https://github.com/$pkgname/$pkgname/archive/$version.tar.gz"
 checksum=f47df73ff270faa70bf53bad68edc85b2dc5623b9c73d06054cd03f5d3332dc0
 nocross=yes
 
+CXXFLAGS="-Wno-error"
+
 post_install() {
 	vinstall ${FILESDIR}/csound.sh 755 etc/profile.d
 	# Avoid conflict with libextractor