fibheap error

if [ x"-fpic" != x ]; then \
  gcc -c -DHAVE_CONFIG_H -g -D_FORTIFY_SOURCE=2 -I. -I../../libiberty/../include  -W -Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic  -D_GNU_SOURCE -fpic ../../libiberty/fibheap.c -o pic/fibheap.o; \
else true; fi
In file included from /usr/include/stdlib.h:24:0,
                 from ../../libiberty/fibheap.c:29:
/usr/include/features.h:331:4: warning: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Wcpp]
 #  warning _FORTIFY_SOURCE requires compiling with optimization (-O)
    ^~~~~~~
../../libiberty/fibheap.c: In function ‘fibheap_replace_key_data’:
../../libiberty/fibheap.c:38:24: error: ‘LONG_MIN’ undeclared (first use in this function)
 #define FIBHEAPKEY_MIN LONG_MIN
                        ^
../../libiberty/fibheap.c:220:30: note: in expansion of macro ‘FIBHEAPKEY_MIN’
   if (okey == key && okey != FIBHEAPKEY_MIN)
                              ^~~~~~~~~~~~~~
../../libiberty/fibheap.c:38:24: note: each undeclared identifier is reported only once for each function it appears in
 #define FIBHEAPKEY_MIN LONG_MIN
                        ^
../../libiberty/fibheap.c:220:30: note: in expansion of macro ‘FIBHEAPKEY_MIN’
   if (okey == key && okey != FIBHEAPKEY_MIN)
                              ^~~~~~~~~~~~~~
../../libiberty/fibheap.c: In function ‘fibheap_delete_node’:
../../libiberty/fibheap.c:38:24: error: ‘LONG_MIN’ undeclared (first use in this function)
 #define FIBHEAPKEY_MIN LONG_MIN
                        ^
../../libiberty/fibheap.c:261:36: note: in expansion of macro ‘FIBHEAPKEY_MIN’
   fibheap_replace_key (heap, node, FIBHEAPKEY_MIN);
                                    ^~~~~~~~~~~~~~
Makefile:751: recipe for target 'fibheap.o' failed
make[3]: *** [fibheap.o] Error 1
make[3]: Leaving directory '/home/valandil/software/aur-PKGBUILDs/gcc-gcj/src/gcc/build/libiberty'
Makefile:10271: recipe for target 'all-stage1-libiberty' failed