PostgreSQL cannot be compiled on RISC-V - Mailing list pgsql-bugs

The full log is here:
https://fedorapeople.org/groups/risc-v/logs/postgresql/9.5.5-1.fc25.0.riscv64/build.log

The extract which fails is:

gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute
-Wformat-security-fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2 -g -pipe -Wall -Werror=format-security
-Wp,-D_FORTIFY_SOURCE=2-fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1-DLINUX_OOM_SCORE_ADJ=0 -fpic -I. -I. -I/usr/include/python3.5m
-I../../../src/include-D_GNU_SOURCE -I/usr/include/libxml2   -c -o plpy_cursorobject.o plpy_cursorobject.c 
In file included from ../../../src/include/storage/lwlock.h:18:0,
                 from ../../../src/include/storage/lock.h:18,
                 from ../../../src/include/access/genam.h:20,
                 from ../../../src/include/nodes/execnodes.h:17,
                 from ../../../src/include/executor/execdesc.h:18,
                 from ../../../src/include/utils/portal.h:50,
                 from ../../../src/include/executor/spi.h:18,
                 from plpy_planobject.h:8,
                 from plpy_cursorobject.c:18:
../../../src/include/storage/s_lock.h:890:2: error: #error PostgreSQL does not have native spinlock support on this
platform.To continue the compilation, rerun configure using --disable-spinlocks. However, performance will be poor.
Pleasereport this to pgsql-bugs@postgresql.org. 
 #error PostgreSQL does not have native spinlock support on this platform.  To continue the compilation, rerun
configureusing --disable-spinlocks.  However, performance will be poor.  Please report this to
pgsql-bugs@postgresql.org.
  ^~~~~
../../../src/include/storage/s_lock.h:962:25: error: unknown type name 'slock_t'
 extern int tas(volatile slock_t *lock);  /* in port/.../tas.s, or
                         ^~~~~~~
../../../src/include/storage/s_lock.h:972:8: error: unknown type name 'slock_t'
 extern slock_t dummy_spinlock;
        ^~~~~~~
../../../src/include/storage/s_lock.h:977:28: error: unknown type name 'slock_t'
 extern int s_lock(volatile slock_t *lock, const char *file, int line);
                            ^~~~~~~
In file included from ../../../src/include/storage/lock.h:18:0,
                 from ../../../src/include/access/genam.h:20,
                 from ../../../src/include/nodes/execnodes.h:17,
                 from ../../../src/include/executor/execdesc.h:18,
                 from ../../../src/include/utils/portal.h:50,
                 from ../../../src/include/executor/spi.h:18,
                 from plpy_planobject.h:8,
                 from plpy_cursorobject.c:18:
../../../src/include/storage/lwlock.h:50:2: error: unknown type name 'slock_t'
  slock_t  mutex;   /* Protects LWLock and queue of PGPROCs */
  ^~~~~~~
<builtin>: recipe for target 'plpy_cursorobject.o' failed
make: *** [plpy_cursorobject.o] Error 1
error: Bad exit status from /var/tmp/rpm-tmp.ZVdDip (%build)




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