https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67467
Bug ID: 67467
Summary: Using "-Wall -Wextra -Wno-unused-dummy-argument"
causes error
Product: gcc
Version: 5.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: exodus6395 at gmail dot com
Target Milestone: ---
Created attachment 36296
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36296&action=edit
Simple test case with an unused argument
Compiling a FORTRAN file which has an unused dummy argument using "-Wall
-Wextra -Wno-unused-dummy-argument" causes a compiler error using gfortran
5.2.0.
Using just two of the three options (-Wall, -Wextra and
-Wno-unused-dummy-argument) causes the expected behaviour i.e. the code
compiles with or without the warning as appropriate. However, using all three
of them together causes the compilation to fail. Removing the code that
generates the warning (eg using the variable a in the example code) lets it
compile as normal.
Example command line and output:
[exodus@laptop-acer test-fortran]$ gfortran -c -o fortran.o -v -save-temps
-Wall -Wextra -Wno-unused-dummy-argument unused-dummy-argument.f90
Using built-in specs.
COLLECT_GCC=gfortran
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc/src/gcc-5.2.0/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --disable-multilib --disable-werror
--enable-checking=release --with-default-libstdcxx-abi=gcc4-compatible
Thread model: posix
gcc version 5.2.0 (GCC)
COLLECT_GCC_OPTIONS='-c' '-o' 'fortran.o' '-v' '-save-temps' '-Wall' '-Wextra'
'-Wno-unused-dummy-argument' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/f951 fortran.f90 -quiet -dumpbase
fortran.f90 -mtune=generic -march=x86-64 -auxbase-strip fortran.o -Wall -Wextra
-Wno-unused-dummy-argument -version -fintrinsic-modules-path
/usr/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/finclude -o fortran.s
GNU Fortran (GCC) version 5.2.0 (x86_64-unknown-linux-gnu)
compiled by GNU C version 5.2.0, GMP version 6.0.0, MPFR version
3.1.3-p4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran2008 (GCC) version 5.2.0 (x86_64-unknown-linux-gnu)
compiled by GNU C version 5.2.0, GMP version 6.0.0, MPFR version
3.1.3-p4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
‘
fortran.f90:7:0:
END FUNCTION
^
in pp_format, at pretty-print.c:614
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.archlinux.org/> for instructions.
