• Eric Blake's avatar
    manywarnings: enable nicer gcc warning messages · 4a5ee89c
    Eric Blake authored
    With gcc 4.3.4, -Wdisabled-optimization is noisy unless you also
    use -funit-at-a-time.
    
    With gcc 4.4.7, there is no indication which warning option
    triggered a particular message unless you also use
    -fdiagnostics-show-option.
    
    Both of these options are default in newer gcc (such as 4.8.1);
    but including them in the list of possible warnings makes the
    experience nicer on older platforms.
    
    * m4/manywarnings.m4 (gl_MANYWARN_ALL_GCC): Older gcc requires
    some -f options for optimal warnings.
    Signed-off-by: default avatarEric Blake <eblake@redhat.com>
    4a5ee89c
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