[Bug fortran/66534] Compilation error of gfortran building on YDL6.2

["textdirected at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66534

--- Comment #4 from HEMMI, Shigeru <textdirected at gmail dot com> ---
Thanks for the reply. 

After my posting, i switched gfortran-5.1.0 to gfortran-5.2.0
expecting something improved. But the same bug has generated
at the same place.

Then i removed two blocks of libgfortran/runtime/string.c 
at your suggestion as shown below

#ifndef HAVE_STRNLEN
/* removed some lines */
#endif

#ifndef HAVE_STRNDUP
/* removed some lines */
#endif

As the result the error above not generated but I see the next bug (See below).
I am guessing many errors embedded for YDL 6.2, since
my hardware (Old iBook; Power PC G3 Processor) is very outdated,
probably nobody wishes to test it except me.

One option is that not to fix further bugs for Power PC G3 Processor 
to save developer's time. This option is OK for me because using
gfortran on my outdated hardware is not significant.
Another option is to continue bug fixing to improve gfortran sources.
Let me know which one is preferable for gfortran developers?


-------
FYI, the next encounterd bug is as follows:

make[2]: Entering directory
`/home/zgzg/libraries/gcc-5.2.0-build/powerpc-unknown-linux-gnu/libgfortran'
make  all-am
make[3]: Entering directory
`/home/zgzg/libraries/gcc-5.2.0-build/powerpc-unknown-linux-gnu/libgfortran'
/bin/sh ./libtool  --tag=CC   --mode=compile
/home/zgzg/libraries/gcc-5.2.0-build/./gcc/xgcc
-B/home/zgzg/libraries/gcc-5.2.0-build/./gcc/
-B/usr/powerpc-unknown-linux-gnu/bin/ -B/usr/powerpc-unknown-linux-gnu/lib/
-isystem /usr/powerpc-unknown-linux-gnu/include -isystem
/usr/powerpc-unknown-linux-gnu/sys-include    -DHAVE_CONFIG_H -I.
-I../../../gcc-5.2.0/libgfortran  -iquote../../../gcc-5.2.0/libgfortran/io
-I../../../gcc-5.2.0/libgfortran/../gcc
-I../../../gcc-5.2.0/libgfortran/../gcc/config  -I../.././gcc
-I../../../gcc-5.2.0/libgfortran/../libgcc -I../libgcc  -std=gnu11 -Wall
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wextra
-Wwrite-strings -Werror=implicit-function-declaration -Werror=vla
-fcx-fortran-rules -ffunction-sections -fdata-sections   -g -O2 -MT fpu.lo -MD
-MP -MF .deps/fpu.Tpo -c -o fpu.lo `test -f 'runtime/fpu.c' || echo
'../../../gcc-5.2.0/libgfortran/'`runtime/fpu.c
libtool: compile:  /home/zgzg/libraries/gcc-5.2.0-build/./gcc/xgcc
-B/home/zgzg/libraries/gcc-5.2.0-build/./gcc/
-B/usr/powerpc-unknown-linux-gnu/bin/ -B/usr/powerpc-unknown-linux-gnu/lib/
-isystem /usr/powerpc-unknown-linux-gnu/include -isystem
/usr/powerpc-unknown-linux-gnu/sys-include -DHAVE_CONFIG_H -I.
-I../../../gcc-5.2.0/libgfortran -iquote../../../gcc-5.2.0/libgfortran/io
-I../../../gcc-5.2.0/libgfortran/../gcc
-I../../../gcc-5.2.0/libgfortran/../gcc/config -I../.././gcc
-I../../../gcc-5.2.0/libgfortran/../libgcc -I../libgcc -std=gnu11 -Wall
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wextra
-Wwrite-strings -Werror=implicit-function-declaration -Werror=vla
-fcx-fortran-rules -ffunction-sections -fdata-sections -g -O2 -MT fpu.lo -MD
-MP -MF .deps/fpu.Tpo -c ../../../gcc-5.2.0/libgfortran/runtime/fpu.c  -fPIC
-DPIC -o .libs/fpu.o
In file included from ../../../gcc-5.2.0/libgfortran/runtime/fpu.c:29:0:
./fpu-target.h:36:24: error: 'fenv_t' undeclared here (not in a function)
 _Static_assert (sizeof(fenv_t) <= (size_t) GFC_FPE_STATE_BUFFER_SIZE,
                        ^
./fpu-target.h:36:17: error: expression in static assertion is not an integer
 _Static_assert (sizeof(fenv_t) <= (size_t) GFC_FPE_STATE_BUFFER_SIZE,
                 ^
./fpu-target.h: In function 'get_fpu_except_flags':
./fpu-target.h:176:31: error: 'FE_ALL_EXCEPT' undeclared (first use in this
function)
   set_excepts = fetestexcept (FE_ALL_EXCEPT);
                               ^
./fpu-target.h:176:31: note: each undeclared identifier is reported only once
for each function it appears in
make[3]: *** [fpu.lo] Error 1
make[3]: Leaving directory
`/home/zgzg/libraries/gcc-5.2.0-build/powerpc-unknown-linux-gnu/libgfortran'
make[2]: *** [all] Error 2
make[2]: Leaving directory
`/home/zgzg/libraries/gcc-5.2.0-build/powerpc-unknown-linux-gnu/libgfortran'
make[1]: *** [all-target-libgfortran] Error 2
make[1]: Leaving directory `/home/zgzg/libraries/gcc-5.2.0-build'
make: *** [all] Error 2