fatal error: jni_md.h: No such file or directory

[Alessandro-Barbieri]

configured with --with-java-extensions
my jni_md.h is in /usr/lib64/icedtea8/include/linux

Making all in java
make[3]: Entering directory '/var/tmp/portage/sys-cluster/genders-9999/work/genders-9999/src/extensions/java'
/bin/bash ../../../libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I../../../config     -Os -pipe -march=native -mfpmath=sse -fopenmp -pthread -fno-unroll-all-loops -fno-unroll-loops -fno-peel-loops -Wformat -Wformat-security -Warray-bounds -Wclobbered -Wvolatile-register-var -Wdate-time -Os -pipe -march=native -mfpmath=sse -fopenmp -pthread -fno-unroll-all-loops -fno-unroll-loops -fno-peel-loops -Wformat -Wformat-security -Warray-bounds -Wclobbered -Wvolatile-register-var -Wdate-time -floop-interchange -ftree-loop-distribute-patterns -fpredictive-commoning -ftree-loop-distribution -fsplit-paths -ftree-vectorize -ftree-partial-pre -fgcse-after-reload -fivopts -Wimplicit-function-declaration -Wno-error=implicit-function-declaration -Wl,-O1 -Wl,--as-needed -Wl,-fuse-ld=gold -lpthread -lgomp -I/usr/lib64/icedtea8/include -c -o Gendersjni.lo `test -f 'src/Gendersjni.c' || echo './'`src/Gendersjni.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I../../../config -Os -pipe -march=native -mfpmath=sse -fopenmp -pthread -fno-unroll-all-loops -fno-unroll-loops -fno-peel-loops -Wformat -Wformat-security -Warray-bounds -Wclobbered -Wvolatile-register-var -Wdate-time -Os -pipe -march=native -mfpmath=sse -fopenmp -pthread -fno-unroll-all-loops -fno-unroll-loops -fno-peel-loops -Wformat -Wformat-security -Warray-bounds -Wclobbered -Wvolatile-register-var -Wdate-time -floop-interchange -ftree-loop-distribute-patterns -fpredictive-commoning -ftree-loop-distribution -fsplit-paths -ftree-vectorize -ftree-partial-pre -fgcse-after-reload -fivopts -Wimplicit-function-declaration -Wno-error=implicit-function-declaration -Wl,-O1 -Wl,--as-needed -Wl,-fuse-ld=gold -lpthread -lgomp -I/usr/lib64/icedtea8/include -c src/Gendersjni.c  -fPIC -DPIC -o .libs/Gendersjni.o
In file included from src/Gendersjni.c:1:
/usr/lib64/icedtea8/include/jni.h:45:10: fatal error: jni_md.h: No such file or directory
   45 | #include "jni_md.h"
      |          ^~~~~~~~~~
compilation terminated.
make[3]: *** [Makefile:497: Gendersjni.lo] Error 1
make[3]: Leaving directory '/var/tmp/portage/sys-cluster/genders-9999/work/genders-9999/src/extensions/java'
make[2]: *** [Makefile:380: all-recursive] Error 1
make[2]: Leaving directory '/var/tmp/portage/sys-cluster/genders-9999/work/genders-9999/src/extensions'
make[1]: *** [Makefile:380: all-recursive] Error 1
make[1]: Leaving directory '/var/tmp/portage/sys-cluster/genders-9999/work/genders-9999/src'
make: *** [Makefile:439: all-recursive] Error 1