While working on reproducible builds for openSUSE, I found that
our gcc14 build fails - possibly because I am using -j1 for deterministic
compilation order.

[31724s] /bin/sh ./libtool  --tag=CC   --mode=compile
/home/abuild/rpmbuild/BUILD/gcc-14.0.1+git9885/obj-x86_64-suse-linux/./gcc/xgcc
-B/home/abuild/rpmbuild/BUILD/gcc-14.0.1+git9885/obj-x86_64-suse-linux/./gcc/
-B/usr/x86_64-suse-linux/bin/ -B/usr/x86_64-suse-linux/lib/ -isystem
/usr/x86_64-suse-linux/include -isystem /usr/x86_64-suse-linux/sys-include   
-DHAVE_CONFIG_H -I. -I../../../../libgfortran 
-iquote../../../../libgfortran/io -I../../../../libgfortran/../gcc
-I../../../../libgfortran/../gcc/config  -I../../.././gcc
-I../../../../libgfortran/../libgcc -I../../libgcc
-I../../../../libgfortran/../libbacktrace -I../../libbacktrace
-I../libbacktrace  -std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wextra -Wwrite-strings
-Werror=implicit-function-declaration -Werror=vla -fcf-protection -mshstk
-fcx-fortran-rules -ffunction-sections -fdata-sections   -g  -O2
-funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection
-Werror=return-type  -m32 -MT unix.lo -MD -MP -MF .deps/unix.Tpo -c -o unix.lo
`test -f 'io/unix.c' || echo '../../../../libgfortran/'`io/unix.c
[31724s] libtool: compile: 
/home/abuild/rpmbuild/BUILD/gcc-14.0.1+git9885/obj-x86_64-suse-linux/./gcc/xgcc
-B/home/abuild/rpmbuild/BUILD/gcc-14.0.1+git9885/obj-x86_64-suse-linux/./gcc/
-B/usr/x86_64-suse-linux/bin/ -B/usr/x86_64-suse-linux/lib/ -isystem
/usr/x86_64-suse-linux/include -isystem /usr/x86_64-suse-linux/sys-include
-DHAVE_CONFIG_H -I. -I../../../../libgfortran -iquote../../../../libgfortran/io
-I../../../../libgfortran/../gcc -I../../../../libgfortran/../gcc/config
-I../../.././gcc -I../../../../libgfortran/../libgcc -I../../libgcc
-I../../../../libgfortran/../libbacktrace -I../../libbacktrace
-I../libbacktrace -std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wextra -Wwrite-strings
-Werror=implicit-function-declaration -Werror=vla -fcf-protection -mshstk
-fcx-fortran-rules -ffunction-sections -fdata-sections -g -O2 -funwind-tables
-fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -m32
-MT unix.lo -MD -MP -MF .deps/unix.Tpo -c ../../../../libgfortran/io/unix.c 
-fPIC -DPIC -o .libs/unix.o
[31724s] ../../../../libgfortran/io/unix.c: In function ‘find_file’:
[31724s] ../../../../libgfortran/io/unix.c:1704:26: error: ‘id’ undeclared
(first use in this function)
[31724s]  1704 | # define FIND_FILE0_ARGS id, path
[31724s]       |                          ^~
[31724s] ../../../../libgfortran/io/unix.c:1778:30: note: in expansion of macro
‘FIND_FILE0_ARGS’
[31724s]  1778 |   u = find_file0 (unit_root, FIND_FILE0_ARGS);
[31724s]       |                              ^~~~~~~~~~~~~~~
[31724s] ../../../../libgfortran/io/unix.c:1704:26: note: each undeclared
identifier is reported only once for each function it appears in
[31724s]  1704 | # define FIND_FILE0_ARGS id, path
[31724s]       |                          ^~
[31724s] ../../../../libgfortran/io/unix.c:1778:30: note: in expansion of macro
‘FIND_FILE0_ARGS’
[31724s]  1778 |   u = find_file0 (unit_root, FIND_FILE0_ARGS);
[31724s]       |                              ^~~~~~~~~~~~~~~
[31724s] make[6]: *** [Makefile:6863: unix.lo] Error 1
[31724s] make[6]: Leaving directory
'/home/abuild/rpmbuild/BUILD/gcc-14.0.1+git9885/obj-x86_64-suse-linux/x86_64-suse-linux/32/libgfortran'
[31724s] make[5]: *** [Makefile:1677: all] Error 2
[31724s] make[5]: Leaving directory
'/home/abuild/rpmbuild/BUILD/gcc-14.0.1+git9885/obj-x86_64-suse-linux/x86_64-suse-linux/32/libgfortran'
[31724s] make[4]: *** [Makefile:7877: multi-do] Error 1
[31724s] make[4]: Leaving directory
'/home/abuild/rpmbuild/BUILD/gcc-14.0.1+git9885/obj-x86_64-suse-linux/x86_64-suse-linux/libgfortran'
[31724s] make[3]: *** [Makefile:7847: all-multi] Error 2
[31724s] make[3]: Leaving directory
'/home/abuild/rpmbuild/BUILD/gcc-14.0.1+git9885/obj-x86_64-suse-linux/x86_64-suse-linux/libgfortran'
[31724s] make[2]: *** [Makefile:1677: all] Error 2
[31724s] make[2]: Leaving directory
'/home/abuild/rpmbuild/BUILD/gcc-14.0.1+git9885/obj-x86_64-suse-linux/x86_64-suse-linux/libgfortran'
[31724s] make[1]: *** [Makefile:22460: all-target-libgfortran] Error 2