* posix/tst-execle1.c (do_test): Add a const.
* posix/tst-execle2.c (do_test): Likewise.
* posix/transbug.c (run_test): Add some casts.
* posix/bug-regex22.c (main): Likewise.
* posix/bug-regex5.c (main): Likewise.
* wcsmbs/tst-mbsrtowcs.c (main): Likewise.
* string/test-strspn.c (do_test, do_random_tests): Likewise.
* string/test-strrchr.c (do_test, do_random_tests): Likewise.
* string/test-strlen.c (do_random_tests): Likewise.
* string/test-strpbrk.c (do_test, do_random_tests): Likewise.
* string/test-strcmp.c (do_random_tests): Likewise.
* string/test-strchr.c (do_test, do_random_tests): Likewise.
* string/test-strcat.c (do_test, do_random_tests): Likewise.
* string/test-strncpy.c (do_random_tests): Likewise.
* string/test-strcpy.c (do_test, do_random_tests): Likewise.
* string/test-memccpy.c (do_test): Likewise.
* string/test-memmove.c (do_test, do_random_tests): Likewise.
* string/test-memcpy.c (do_test, do_random_tests): Likewise.
* string/test-memcmp.c (do_test, do_random_tests): Likewise.
* string/test-memchr.c (do_test, do_random_tests): Likewise.
* dlfcn/bug-atexit1.c (do_test): Fix up prototype in cast.
* stdio-common/tst-fgets.c (do_test): Add a cast.
* iconvdata/bug-iconv4.c (xiconv): Add a cast.
* locale/programs/simple-hash.c (insert_entry_2): Remove useless casts.
* resolv/herror.c (herror): Remove unused extern decl.
* libio/obprintf.c: Include "strfile.h".
* elf/order2mod2.c (init): Cast ignored value to void.
* stdio-common/tstdiomisc.c: If FLT_EVAL_METHOD is 2, use long