[Bug fortran/20374] New: Unwarranted warning when preprocessing

["tobi at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

[tobi@marktplatz tests]$ gfortran f2c.F90 -fno-underscoring -c
cc1: warning: command line option "-fno-underscoring" is valid for F95 but not for C
[tobi@marktplatz tests]$

Where f2c.F90 is an existing file.  -v output:

[tobi@marktplatz tests]$ gfortran f2c.F90 -fno-underscoring -c -v
Using built-in specs.
Configured with: ../gcc-clean/configure --prefix=/home/tobi/usr
--enable-languages=c,f95 : (reconfigured) ../gcc-clean/configure
--prefix=/home/tobi/usr
--with-gcc-version-trigger=/home/tobi/src/gcc/gcc-clean/gcc/version.c
--enable-languages=c,f95 --no-create --no-recursion : (reconfigured)
../gcc-clean/configure --prefix=/home/tobi/usr
--with-gcc-version-trigger=/home/tobi/src/gcc/gcc-clean/gcc/version.c
--enable-languages=c,f95 --no-create --no-recursion : (reconfigured)
../gcc-clean/configure --prefix=/home/tobi/usr
--with-gcc-version-trigger=/home/tobi/src/gcc/gcc-clean/gcc/version.c
--enable-languages=c,f95 --no-create --no-recursion : (reconfigured)
../gcc-clean/configure --prefix=/home/tobi/usr
--with-gcc-version-trigger=/home/tobi/src/gcc/gcc-clean/gcc/version.c
--enable-languages=c,f95 --no-create --no-recursion : (reconfigured)
../gcc-clean/configure --prefix=/home/tobi/usr
--with-gcc-version-trigger=/home/tobi/src/gcc/gcc-clean/gcc/version.c
--enable-languages=c,f95 --no-create --no-recursion : (reconfigured)
../gcc-clean/configure --prefix=/home/tobi/usr
--with-gcc-version-trigger=/home/tobi/src/gcc/gcc-clean/gcc/version.c
--enable-languages=c,f95 --no-create --no-recursion : (reconfigured)
../gcc-clean/configure --prefix=/home/tobi/usr
--with-gcc-version-trigger=/home/tobi/src/gcc/gcc-clean/gcc/version.c
--enable-languages=c,f95 --no-create --no-recursion : (reconfigured)
../gcc-clean/configure --prefix=/home/tobi/usr
--with-gcc-version-trigger=/home/tobi/src/gcc/gcc-clean/gcc/version.c
--enable-languages=c,f95 --no-create --no-recursion : (reconfigured)
../gcc-clean/configure --prefix=/home/tobi/usr : (reconfigured)
../gcc-clean/configure --prefix=/home/tobi/usr --enable-languages=c,f95
Thread model: posix
gcc version 4.0.0 20050104 (experimental)
 /home/tobi/usr/libexec/gcc/i686-pc-linux-gnu/4.0.0/cc1 -E -traditional-cpp
-D_LANGUAGE_FORTRAN -quiet -v f2c.F90 -mtune=pentiumpro -fno-underscoring -o
/tmp/cc8l3bzB.f95
cc1: warning: command line option "-fno-underscoring" is valid for F95 but not for C
ignoring nonexistent directory
"/home/tobi/usr/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /home/tobi/usr/include
 /home/tobi/usr/lib/gcc/i686-pc-linux-gnu/4.0.0/include
 /usr/include
End of search list.
 /home/tobi/usr/libexec/gcc/i686-pc-linux-gnu/4.0.0/f951 /tmp/cc8l3bzB.f95
-quiet -dumpbase f2c.F90 -mtune=pentiumpro -auxbase f2c -version
-fno-underscoring -o /tmp/cc4QOaf8.s
GNU F95 version 4.0.0 20050104 (experimental) (i686-pc-linux-gnu)
        compiled by GNU C version 4.0.0 20050104 (experimental).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
 as -V -Qy -o f2c.o /tmp/cc4QOaf8.s
GNU assembler version 2.15.92.0.2 (i386-redhat-linux) using BFD version
2.15.92.0.2 20040927

-- 
           Summary: Unwarranted warning when preprocessing
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tobi at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20374