Re: GCC warning options for numerical programs

[Jonathan Wakely <jwakely.gcc@xxxxxxxxx>]

On 23 April 2012 05:20, Jeffrey Walton wrote:
> Hi All,
>
> http://www.gnu.org/software/gsl/manual/html_node/GCC-warning-options-for-numerical-programs.html
> recommends the following:
>
>     gcc -ansi -pedantic -Werror -Wall -W
>       -Wmissing-prototypes -Wstrict-prototypes
>       -Wconversion -Wshadow -Wpointer-arith
>       -Wcast-qual -Wcast-align
>       -Wwrite-strings -Wnested-externs
>       -fshort-enums -fno-common -Dinline= -g -O2
>
> Is it possible to efficiently tell which of the above options are not
> included with -Wall -Wextra?

There are only nine of them, look them up in the manual and see if it
says "This option is enabled by -Wall"

> Wouldn't -Weverything be easier on folks who really want to know about
> all errata? Its a helpful Clang switch.

The switches above are not all warnings, a -Weverything would turn on
a lot more and increase the number of false positives.