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Remove a warning from symtab.c

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When building symtab.c, I get:

../../binutils-gdb/gdb/language.h: In function ‘void print_symbol_info(search_domain, symbol*, int, const char*)’:
../../binutils-gdb/gdb/language.h:738:20: warning: ‘*((void*)& l +4)’ may be used uninitialized in this function [-Wmaybe-uninitialized]
       set_language (m_lang);
       ~~~~~~~~~~~~~^~~~~~~~
../../binutils-gdb/gdb/symtab.c:4613:41: note: ‘*((void*)& l +4)’ was declared here
   scoped_switch_to_sym_language_if_auto l (sym);
                                         ^

This is another instance of the std::optional problem, see
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80635.

However, it seemed straightforward and inexpensive to me to silence
this one, which is what this patch does.

gdb/ChangeLog
2019-01-23  Tom Tromey  <tom@tromey.com>

	* language.h (class scoped_switch_to_sym_language_if_auto):
	Initialize m_lang in both cases.
This commit is contained in:
Tom Tromey 2019-01-18 07:45:01 -07:00
parent 6594e12286
commit ae73e2e243
2 changed files with 11 additions and 1 deletions
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5
gdb/ChangeLog
View file

@ -1,3 +1,8 @@
2019-01-23 Tom Tromey <tom@tromey.com>
* language.h (class scoped_switch_to_sym_language_if_auto):
Initialize m_lang in both cases.
2019-01-23 Alan Hayward <alan.hayward@arm.com> 2019-01-23 Alan Hayward <alan.hayward@arm.com>
* nat/aarch64-linux.c (aarch64_linux_new_thread): Replace XNEW * nat/aarch64-linux.c (aarch64_linux_new_thread): Replace XNEW

7
gdb/language.h
View file

@ -726,7 +726,12 @@ public:
set_language (SYMBOL_LANGUAGE (sym)); set_language (SYMBOL_LANGUAGE (sym));
} }
else else
m_switched = false; {
m_switched = false;
/* Assign to m_lang to silence a GCC warning. See
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80635. */
m_lang = language_unknown;
}
} }
~scoped_switch_to_sym_language_if_auto () ~scoped_switch_to_sym_language_if_auto ()