netpbm-dev: /usr/include/netpbm directory is missing

Package Information

• Package name: netpbm-dev
• Package version: netpbm-dev-11.6.1-r1
• Alpine version: 3.20.2
• Alpine architecture: x86_64

Summary

All netpbm header files in /usr/include expect each other in a subdirectory 'netpbm', which does not exist.

E.g. in /usr/include/pbm.h, one can read:

#include <netpbm/pm.h>

Steps to reproduce

apk add pkgconfig netpbm-dev gcc

cat << EOF > /tmp/test.c
#include <pbm.h>

int
main(int argc, char **argv)
{
        return 0;
}
EOF

gcc -o /tmp/test /tmp/test.c $( pkg-config --cflags --libs netpbm )

apk del pkgconfig netpbm-dev gcc