db46 issues when db.h from db46 is in include path

gistfile1.txt

### with selection from group db set to none

/bin/sh ./libtool --mode=compile /usr/bin/clang -c -pipe -Os -arch x86_64  -I../dist/.. -I/opt/local/include ../dist/../db_dump185/db_dump185.c
 /usr/bin/clang -c -pipe -Os -arch x86_64 -I../dist/.. -I/opt/local/include ../dist/../db_dump185/db_dump185.c  -fno-common -DPIC -o .libs/db_dump185.o
../dist/../db_dump185/db_dump185.c:189:15: warning: implicit declaration of function 'getopt' is invalid in C99 [-Wimplicit-function-declaration]
        while ((ch = getopt(argc, argv, "f:p")) != EOF)
                     ^
1 warning generated.



### with selection from group db set to db46

/bin/sh ./libtool --mode=compile /usr/bin/clang -c -pipe -Os -arch x86_64  -I../dist/.. -I/opt/local/include ../dist/../db_dump185/db_dump185.c
 /usr/bin/clang -c -pipe -Os -arch x86_64 -I../dist/.. -I/opt/local/include ../dist/../db_dump185/db_dump185.c  -fno-common -DPIC -o .libs/db_dump185.o
../dist/../db_dump185/db_dump185.c:211:13: warning: implicit declaration of function 'dbopen' is invalid in C99 [-Wimplicit-function-declaration]
        if ((dbp = dbopen(argv[0], O_RDONLY, 0, DB_BTREE, NULL)) == NULL) {
                   ^
../dist/../db_dump185/db_dump185.c:211:11: warning: incompatible integer to pointer conversion assigning to 'DB *' (aka 'struct __db *') from 'int' [-Wint-conversion]
        if ((dbp = dbopen(argv[0], O_RDONLY, 0, DB_BTREE, NULL)) == NULL) {
                 ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../dist/../db_dump185/db_dump185.c:212:12: warning: incompatible integer to pointer conversion assigning to 'DB *' (aka 'struct __db *') from 'int' [-Wint-conversion]
                if ((dbp =
                         ^
../dist/../db_dump185/db_dump185.c:228:24: error: no member named 'seq' in 'struct __db'
                while (!(rval = dbp->seq(dbp, &key, &data, R_NEXT))) {
                                ~~~  ^
../dist/../db_dump185/db_dump185.c:228:46: error: use of undeclared identifier 'R_NEXT'
                while (!(rval = dbp->seq(dbp, &key, &data, R_NEXT))) {
                                                           ^
../dist/../db_dump185/db_dump185.c:233:24: error: no member named 'seq' in 'struct __db'
                while (!(rval = dbp->seq(dbp, &key, &data, R_NEXT))) {
                                ~~~  ^
../dist/../db_dump185/db_dump185.c:233:46: error: use of undeclared identifier 'R_NEXT'
                while (!(rval = dbp->seq(dbp, &key, &data, R_NEXT))) {
                                                           ^
../dist/../db_dump185/db_dump185.c:261:18: error: no member named 'internal' in 'struct __db'
        hash185p = dbp->internal;
                   ~~~  ^
../dist/../db_dump185/db_dump185.c:263:19: error: no member named 'internal' in 'struct __db'
                hash186p = dbp->internal;
                           ~~~  ^
../dist/../db_dump185/db_dump185.c:288:13: error: no member named 'internal' in 'struct __db'
        btp = dbp->internal;
              ~~~  ^
3 warnings and 7 errors generated.