systemtap: fix for compilation with gcc 4.6.0

(From OE-Core rev: dba803d10c0151755ed107cba71b6f31b9660933)

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 121 insertions, 1 deletions

diff --git a/meta/recipes-kernel/systemtap/systemtap/fix_for_compilation_with_gcc-4.6.0.patch b/meta/recipes-kernel/systemtap/systemtap/fix_for_compilation_with_gcc-4.6.0.patch
new file mode 100644
index 0000000000..a32217586f
--- /dev/null
+++ b/meta/recipes-kernel/systemtap/systemtap/fix_for_compilation_with_gcc-4.6.0.patch
@@ -0,0 +1,119 @@
+Upstream-Status: Pending
+
+Fix following compiler errors with gcc 4.6.0:
+Nitin A Kamble <nitin.a.kamble@intel.com> 2011/05/09
+
+| tapsets.cxx: In member function 'void sdt_query::handle_probe_entry()':
+| tapsets.cxx:5295:8: error: variable 'kprobe_found' set but not used [-Werror=unused-but-set-variable]
+| tapsets.cxx: In member function 'virtual void hwbkpt_builder::build(systemtap_session&, probe*, probe_point*, const literal_map_t&, std::vector<derived_probe*>&)':
+| tapsets.cxx:7655:18: error: variable 'has_symbol_str' set but not used [-Werror=unused-but-set-variable]
+| cc1plus: all warnings being treated as errors
+| 
+| make[2]: *** [stap-tapsets.o] Error 1
+| translate.cxx: In member function 'virtual void c_unparser::visit_print_format(print_format*)':
+| translate.cxx:4431:6: error: variable 'width_ix' set but not used [-Werror=unused-but-set-variable]
+| cc1plus: all warnings being treated as errors
+| 
+| make[2]: *** [stap-translate.o] Error 1
+| common.c: In function 'fatal_handler':
+| common.c:397:13: error: variable 'rc' set but not used [-Werror=unused-but-set-variable]
+| cc1: all warnings being treated as errors
+| 
+| make[3]: *** [common.o] Error 1
+| make[3]: *** Waiting for unfinished jobs....
+| common.c: In function 'fatal_handler':
+| common.c:397:13: error: variable 'rc' set but not used [-Werror=unused-but-set-variable]
+| cc1: all warnings being treated as errors
+| 
+| mainloop.c: In function 'chld_proc':
+| mainloop.c:56:11: error: variable 'rc' set but not used [-Werror=unused-but-set-variable]
+| mainloop.c: In function 'stp_main_loop':
+| mainloop.c:623:17: error: variable 'rc' set but not used [-Werror=unused-but-set-variable]
+| cc1: all warnings being treated as errors
+| 
+
+Index: git/tapsets.cxx
+===================================================================
+--- git.orig/tapsets.cxx
++++ git/tapsets.cxx
+@@ -5292,7 +5292,6 @@ sdt_query::handle_probe_entry()
+   probe *new_base = convert_location();
+   probe_point *new_location = new_base->locations[0];
+ 
+-  bool kprobe_found = false;
+   bool need_debug_info = false;
+ 
+   Dwarf_Addr bias;
+@@ -5302,7 +5301,6 @@ sdt_query::handle_probe_entry()
+   if (have_kprobe())
+     {
+       convert_probe(new_base);
+-      kprobe_found = true;
+       // Expand the local variables in the probe body
+       sdt_kprobe_var_expanding_visitor svv (module_val,
+                                            provider_name,
+@@ -7652,7 +7650,7 @@ hwbkpt_builder::build(systemtap_session 
+ {
+   string symbol_str_val;
+   int64_t hwbkpt_address, len;
+-  bool has_addr, has_symbol_str, has_write, has_rw, has_len;
++  bool has_addr, has_write, has_rw, has_len;
+ 
+   if (! (sess.kernel_config["CONFIG_PERF_EVENTS"] == string("y")))
+       throw semantic_error ("CONFIG_PERF_EVENTS not available on this kernel",
+@@ -7662,7 +7660,6 @@ hwbkpt_builder::build(systemtap_session 
+                             location->components[0]->tok);
+ 
+   has_addr = get_param (parameters, TOK_HWBKPT, hwbkpt_address);
+-  has_symbol_str = get_param (parameters, TOK_HWBKPT, symbol_str_val);
+   has_len = get_param (parameters, TOK_LENGTH, len);
+   has_write = (parameters.find(TOK_HWBKPT_WRITE) != parameters.end());
+   has_rw = (parameters.find(TOK_HWBKPT_RW) != parameters.end());
+Index: git/translate.cxx
+===================================================================
+--- git.orig/translate.cxx
++++ git/translate.cxx
+@@ -4428,7 +4428,7 @@ c_unparser::visit_print_format (print_fo
+          continue;
+ 
+        /* Take note of the width and precision arguments, if any.  */
+-       int width_ix = -1, prec_ix= -1;
++       int __attribute((__unused__)) width_ix = -1, prec_ix= -1;
+        if (components[i].widthtype == print_format::width_dynamic)
+          width_ix = arg_ix++;
+        if (components[i].prectype == print_format::prec_dynamic)
+Index: git/runtime/staprun/common.c
+===================================================================
+--- git.orig/runtime/staprun/common.c
++++ git/runtime/staprun/common.c
+@@ -394,7 +394,7 @@ void parse_modpath(const char *inpath)
+ #define ERR_MSG "\nUNEXPECTED FATAL ERROR in staprun. Please file a bug report.\n"
+ static void fatal_handler (int signum)
+ {
+-        int rc;
++        int __attribute__((__unused__)) rc;
+         char *str = strsignal(signum);
+         rc = write (STDERR_FILENO, ERR_MSG, sizeof(ERR_MSG));
+         rc = write (STDERR_FILENO, str, strlen(str));
+Index: git/runtime/staprun/mainloop.c
+===================================================================
+--- git.orig/runtime/staprun/mainloop.c
++++ git/runtime/staprun/mainloop.c
+@@ -53,7 +53,7 @@ static void *signal_thread(void *arg)
+ 
+ static void chld_proc(int signum)
+ {
+-  int32_t rc, btype = STP_EXIT;
++  int32_t __attribute__((__unused__)) rc, btype = STP_EXIT;
+   dbug(2, "chld_proc %d (%s)\n", signum, strsignal(signum));
+   pid_t pid = waitpid(-1, NULL, WNOHANG);
+   if (pid != target_pid)
+@@ -620,7 +620,7 @@ int stp_main_loop(void)
+       {
+         /* module asks us to start exiting, so send STP_EXIT */
+         dbug(2, "got STP_REQUEST_EXIT\n");
+-        int32_t rc, btype = STP_EXIT;
++        int32_t __attribute__((__unused__))rc, btype = STP_EXIT;
+         rc = write(control_channel, &btype, sizeof(btype));
+         break;
+       }
diff --git a/meta/recipes-kernel/systemtap/systemtap_git.bb b/meta/recipes-kernel/systemtap/systemtap_git.bb
index 4df09478de..8ac4c14862 100644
--- a/meta/recipes-kernel/systemtap/systemtap_git.bb
+++ b/meta/recipes-kernel/systemtap/systemtap_git.bb
@@ -5,10 +5,11 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=94d55d512a9ba36caa9b7df079bae19f"
 DEPENDS = "elfutils"
 
 SRCREV = "4ab3a1863bf4f472acae7a809bf2b38d91658aa8"
-PR = r0
+PR = "r1"
 PV = "1.4+git${SRCPV}"
 
 SRC_URI = "git://sources.redhat.com/git/systemtap.git;protocol=git \
+        file://fix_for_compilation_with_gcc-4.6.0.patch \
           "
 
 EXTRA_OECONF = "--prefix=${D} --with-libelf=${STAGING_DIR_TARGET} --without-rpm \