On Mon, 18 Jun 2012, Eric Blake wrote:
On 06/16/2012 12:01 AM, Vincent Torri wrote:
On Fri, 15 Jun 2012, Eric Blake wrote:
On 06/15/2012 04:55 PM, Vincent Torri wrote:
AC_DEFUN([EFL_CHECK_COMPILER_FLAG],
[
m4_pushdef([UPEFL], m4_translit([[$1]], [-a-z], [_A-Z]))
m4_pushdef([UP], m4_translit([[$2]], [-a-z], [_A-Z]))
m4_if(m4_index([$2], [-Wno-]), [0], [m4_pushdef([flagm4],
[m4_bpatsubst([[$2]], [no-])])], [m4_pushdef([flagm4], [$2])])
option=m4_bpatsubst([[$2]], [no-])
Actually, i want to store in option -Wfoo if $2 is -Wno-foo, and only
that case. It's for testing if a compiler option is available (after
discussion with gcc guys, -Wno-foo use produces a warning while -Wfoo
use produces an error). So if I pass -fno-bar, option will store -fbar,
which is not what I want. So I guess that I have to use the m4_if
construction.
But you can still be shorter than using a pushdef:
option=m4_bpatsubst([[$2]], [^-Wno-], [-W])
does not work. Removing ^ seems to work
thank you
Vincent Torri
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