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On 10/28/2016 06:46 AM, Carlos O'Donell wrote:
+/* With GCC 5.3 when compiling with -Os the compiler emits a warning + that buf[0] and buf[1] may be used uninitialized. This can only + happen in the case where tmpbuf[3] is used, and in that case the + write to the tmpbuf[1] and tmpbuf[2] was assured because + ucs4_to_cns11643 would have filled in those entries. The difficulty + is in getting the compiler to see this logic because tmpbuf[0] is + involved in determining the code page and is the indicator that + tmpbuf[2] is initialized. */ +DIAG_PUSH_NEEDS_COMMENT; +DIAG_IGNORE_NEEDS_COMMENT (5.3, "-Wmaybe-uninitialized");
This hides the warning for -O2 builds as well, so I don't think this is a good idea.
Those who want to build with -Os or other special compiler flags should just configure with --disable-werror. We can't account for every optimization someone might want to disable in their build.
Florian
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