http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58001
Dominique d'Humieres <dominiq at lps dot ens.fr> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2013-07-30 Ever confirmed|0 |1 --- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- Compiling the following code with -Wtabs print *, "A string with Tabs instead of spaces" print 1894 1894 format( '123') end gives pr58001.f90:3.14: 1894 format( '123') 1 Warning: Extension: Tab character in format at (1) If compiled with -Wno-tabs, it gives pr58001.f90:2.1: print 1894 1 Warning: Nonconforming tab character at (1) pr58001.f90:3.14: 1894 format( '123') 1 Warning: Nonconforming tab character at (1) pr58001.f90:3.14: 1894 format( '123') 1 Warning: Extension: Tab character in format at (1) Is this the expected behavior?-(I was expecting the later output for -Wtabs, and no warning with -Wno-tabs: on most options Wno-* suppress the warnings for the corresponding option.)