tidy-up: delete unused build configuration macros

Most of them feature guards:

- `CURL_INCLUDES_SYS_UIO` [1]
- `HAVE_ALLOCA_H` [2]
- `HAVE_CRYPTO_CLEANUP_ALL_EX_DATA` (unused since de71e68000c8624ea13f90b136f8734dd0fb1bdc)
- `HAVE_DLFCN_H`
- `HAVE_DLOPEN`
- `HAVE_DOPRNT`
- `HAVE_FCNTL`
- `HAVE_GETHOSTBYNAME` [3]
- `HAVE_GETOPT_H`
- `HAVE_GETPASS`
- `HAVE_GETPROTOBYNAME`
- `HAVE_GETSERVBYNAME`
- `HAVE_IDN_FREE*`
- `HAVE_INET_ADDR`
- `HAVE_IOCTL`
- `HAVE_KRB4`
- `HAVE_KRB_GET_OUR_IP_FOR_REALM`
- `HAVE_KRB_H`
- `HAVE_LDAPSSL_H`
- `HAVE_LDAP_INIT_FD`
- `HAVE_LIBDL`
- `HAVE_LIBNSL`
- `HAVE_LIBRESOLV*`
- `HAVE_LIBUCB`
- `HAVE_LL`
- `HAVE_LOCALTIME_R`
- `HAVE_MALLOC_H`
- `HAVE_MEMCPY`
- `HAVE_MEMORY_H`
- `HAVE_NETINET_IF_ETHER_H`
- `HAVE_NI_WITHSCOPEID`
- `HAVE_OPENSSL_CRYPTO_H`
- `HAVE_OPENSSL_ERR_H`
- `HAVE_OPENSSL_PEM_H`
- `HAVE_OPENSSL_PKCS12_H`
- `HAVE_OPENSSL_RAND_H`
- `HAVE_OPENSSL_RSA_H`
- `HAVE_OPENSSL_SSL_H`
- `HAVE_OPENSSL_X509_H`
- `HAVE_PEM_H`
- `HAVE_POLL`
- `HAVE_RAND_SCREEN`
- `HAVE_RAND_STATUS`
- `HAVE_RECVFROM`
- `HAVE_SETSOCKOPT`
- `HAVE_SETVBUF`
- `HAVE_SIZEOF_LONG_DOUBLE`
- `HAVE_SOCKIO_H`
- `HAVE_SOCK_OPTS`
- `HAVE_STDIO_H`
- `HAVE_STRCASESTR`
- `HAVE_STRFTIME`
- `HAVE_STRLCAT`
- `HAVE_STRNCMPI`
- `HAVE_STRNICMP`
- `HAVE_STRSTR`
- `HAVE_STRUCT_IN6_ADDR`
- `HAVE_TLD_H`
- `HAVE_TLD_STRERROR`
- `HAVE_UNAME`
- `HAVE_USLEEP`
- `HAVE_WINBER_H`
- `HAVE_WRITEV`
- `HAVE_X509_H`
- `LT_OBJDIR`
- `NEED_BASENAME_PROTO`
- `NOT_NEED_LIBNSL`
- `OPENSSL_NO_KRB5`
- `RECVFROM_TYPE*`
- `SIZEOF_LONG_DOUBLE`
- `STRERROR_R_TYPE_ARG3`
- `USE_YASSLEMUL`
- `_USRDLL` (from CMake) [4]

[1] Related parts in `m4/curl-functions.m4` and `configure.ac` might
    also be deleted.

[2] Related comment can possibly be deleted in
    `packages/vms/generate_config_vms_h_curl.com`.

[3] There are more instances of this in autotools, but I did not dare to
    touch those. Looked like it's used to detect socket support.

[4] This is necessary for MFC (Microsoft Foundation Class) DLLs to
    force linking MFC components statically to the DLL. `libcurl.dll`
    does not use MFC, so we can delete this define.
    Ref: https://docs.microsoft.com/cpp/build/regular-dlls-statically-linked-to-mfc

Script that can help finding unused settings like above:
```shell

autoheader configure.ac  # generate lib/curl_config.h.in

{
  grep -o -E    'set\([A-Z][A-Z0-9_]{3,}'          CMake/Platforms/WindowsCache.cmake | sed -E 's|set\(||g'
  grep -o -E -h '#define +[A-Z][A-Z0-9_]{3,}'      lib/config-*.h                     | sed -E 's|#define +||g'
  grep -o -E    '#cmakedefine +[A-Z][A-Z0-9_]{3,}' lib/curl_config.h.cmake            | sed -E 's|#cmakedefine +||g'
  grep -o -E    '#undef +[A-Z][A-Z0-9_]{3,}'       lib/curl_config.h.in               | sed -E 's|#undef +||g'
} | sort -u | grep -v -F 'HEADER_CURL_' | while read -r def; do
  c="$(git grep -w -F "${def}" | grep -v -E -c '(/libcurl\.tmpl|^lib/config-|^lib/curl_config\.h\.cmake|^CMakeLists\.txt|^CMake/Platforms/WindowsCache\.cmake|^packages/vms/config_h\.com|^m4/curl-functions\.m4|^acinclude\.m4|^configure\.ac)')"
  if [ "${c}" = '0' ]; then
    echo "${def}"
  fi
done
```

Reviewed-by: Daniel Stenberg
Closes #9044

1 files changed, 0 insertions, 123 deletions

diff --git a/lib/config-riscos.h b/lib/config-riscos.h
index 383656240..71a67b0e1 100644
--- a/lib/config-riscos.h
+++ b/lib/config-riscos.h
@@ -34,9 +34,6 @@
 /* Version number of this archive. */
 #undef VERSION
 
-/* Define if you have the getpass function.  */
-#undef HAVE_GETPASS
-
 /* Define cpu-machine-OS */
 #define OS "ARM-RISC OS"
 
@@ -55,9 +52,6 @@
 /* Define if you need the _REENTRANT define for some functions */
 #undef NEED_REENTRANT
 
-/* Define if you have the Kerberos4 libraries (including -ldes) */
-#undef HAVE_KRB4
-
 /* Define if you want to enable IPv6 support */
 #undef ENABLE_IPV6
 
@@ -79,9 +73,6 @@
 /* Define if you have the alarm function. */
 #define HAVE_ALARM
 
-/* Define if you have the <alloca.h> header file. */
-#define HAVE_ALLOCA_H
-
 /* Define if you have the <arpa/inet.h> header file. */
 #define HAVE_ARPA_INET_H
 
@@ -109,117 +100,48 @@
 /* Define if you have the `gethostname' function. */
 #define HAVE_GETHOSTNAME
 
-/* Define if you have the <getopt.h> header file. */
-#define HAVE_GETOPT_H
-
 /* Define if you have the `getpass_r' function. */
 #undef HAVE_GETPASS_R
 
 /* Define if you have the `getpwuid' function. */
 #undef HAVE_GETPWUID
 
-/* Define if you have the `getservbyname' function. */
-#undef HAVE_GETSERVBYNAME
-
 /* Define if you have the `gettimeofday' function. */
 #define HAVE_GETTIMEOFDAY
 
 /* Define if you have the `timeval' struct. */
 #define HAVE_STRUCT_TIMEVAL
 
-/* Define if you have the `inet_addr' function. */
-#undef HAVE_INET_ADDR
-
 /* Define if you have the <inttypes.h> header file. */
 #define HAVE_INTTYPES_H
 
 /* Define if you have the <io.h> header file. */
 #undef HAVE_IO_H
 
-/* Define if you have the `krb_get_our_ip_for_realm' function. */
-#undef HAVE_KRB_GET_OUR_IP_FOR_REALM
-
-/* Define if you have the <krb.h> header file. */
-#undef HAVE_KRB_H
-
-/* Define if you have the `nsl' library (-lnsl). */
-#undef HAVE_LIBNSL
-
-/* Define if you have the `resolv' library (-lresolv). */
-#undef HAVE_LIBRESOLV
-
-/* Define if you have the `resolve' library (-lresolve). */
-#undef HAVE_LIBRESOLVE
-
 /* Define if you have the `socket' library (-lsocket). */
 #undef HAVE_LIBSOCKET
 
-/* Define if you have the `ucb' library (-lucb). */
-#undef HAVE_LIBUCB
-
-/* Define if you have the `localtime_r' function. */
-#undef HAVE_LOCALTIME_R
-
-/* Define if you have the <malloc.h> header file. */
-#define HAVE_MALLOC_H
-
 /* Define if you need the malloc.h header file even with stdlib.h  */
 /* #define NEED_MALLOC_H 1 */
 
-/* Define if you have the <memory.h> header file. */
-#undef HAVE_MEMORY_H
-
 /* Define if you have the <netdb.h> header file. */
 #define HAVE_NETDB_H
 
-/* Define if you have the <netinet/if_ether.h> header file. */
-#undef HAVE_NETINET_IF_ETHER_H
-
 /* Define if you have the <netinet/in.h> header file. */
 #define HAVE_NETINET_IN_H
 
 /* Define if you have the <net/if.h> header file. */
 #define HAVE_NET_IF_H
 
-/* Define if you have the <openssl/crypto.h> header file. */
-#undef HAVE_OPENSSL_CRYPTO_H
-
-/* Define if you have the <openssl/err.h> header file. */
-#undef HAVE_OPENSSL_ERR_H
-
-/* Define if you have the <openssl/pem.h> header file. */
-#undef HAVE_OPENSSL_PEM_H
-
-/* Define if you have the <openssl/rsa.h> header file. */
-#undef HAVE_OPENSSL_RSA_H
-
-/* Define if you have the <openssl/ssl.h> header file. */
-#undef HAVE_OPENSSL_SSL_H
-
-/* Define if you have the <openssl/x509.h> header file. */
-#undef HAVE_OPENSSL_X509_H
-
-/* Define if you have the <pem.h> header file. */
-#undef HAVE_PEM_H
-
 /* Define if you have the <pwd.h> header file. */
 #undef HAVE_PWD_H
 
 /* Define if you have the `RAND_egd' function. */
 #undef HAVE_RAND_EGD
 
-/* Define if you have the `RAND_screen' function. */
-#undef HAVE_RAND_SCREEN
-
-/* Define if you have the `RAND_status' function. */
-#undef HAVE_RAND_STATUS
-
 /* Define if you have the `select' function. */
 #define HAVE_SELECT
 
-/* Define if you have the `setvbuf' function. */
-#undef HAVE_SETVBUF
-
 /* Define if you have the `sigaction' function. */
 #undef HAVE_SIGACTION
 
@@ -250,9 +172,6 @@
 /* Define if you have the `strdup' function. */
 #define HAVE_STRDUP
 
-/* Define if you have the `strftime' function. */
-#define HAVE_STRFTIME
-
 /* Define if you have the `stricmp' function. */
 #define HAVE_STRICMP
 
@@ -262,9 +181,6 @@
 /* Define if you have the <string.h> header file. */
 #define HAVE_STRING_H
 
-/* Define if you have the `strstr' function. */
-#define HAVE_STRSTR
-
 /* Define if you have the `strtok_r' function. */
 #undef HAVE_STRTOK_R
 
@@ -301,24 +217,15 @@
 /* Define if you have the <time.h> header file. */
 #undef HAVE_TIME_H
 
-/* Define if you have the `uname' function. */
-#define HAVE_UNAME
-
 /* Define if you have the <unistd.h> header file. */
 #define HAVE_UNISTD_H
 
-/* Define if you have the <x509.h> header file. */
-#undef HAVE_X509_H
-
 /* Name of package */
 #undef PACKAGE
 
 /* The size of `int', as computed by sizeof. */
 #define SIZEOF_INT 4
 
-/* The size of `long double', as computed by sizeof. */
-#undef SIZEOF_LONG_DOUBLE
-
 /* The size of `long long', as computed by sizeof. */
 #undef SIZEOF_LONG_LONG
 
@@ -359,9 +266,6 @@
 /* Define to `int' if <sys/types.h> does not define. */
 #undef ssize_t
 
-/* Define if you have the ioctl function. */
-#define HAVE_IOCTL
-
 /* Define if you have a working ioctl FIONBIO function. */
 #define HAVE_IOCTL_FIONBIO
 
@@ -386,33 +290,6 @@
 /* Define to the function return type for recv. */
 #define RECV_TYPE_RETV ssize_t
 
-/* Define 1 if you have the recvfrom function. */
-#define HAVE_RECVFROM 1
-
-/* Define to the type of arg 1 for recvfrom. */
-#define RECVFROM_TYPE_ARG1 int
-
-/* Define to the type pointed by arg 2 for recvfrom. */
-#define RECVFROM_TYPE_ARG2 void
-
-/* Define if the type pointed by arg 2 for recvfrom is void. */
-#define RECVFROM_TYPE_ARG2_IS_VOID
-
-/* Define to the type of arg 3 for recvfrom. */
-#define RECVFROM_TYPE_ARG3 size_t
-
-/* Define to the type of arg 4 for recvfrom. */
-#define RECVFROM_TYPE_ARG4 int
-
-/* Define to the type pointed by arg 5 for recvfrom. */
-#define RECVFROM_TYPE_ARG5 struct sockaddr
-
-/* Define to the type pointed by arg 6 for recvfrom. */
-#define RECVFROM_TYPE_ARG6 int
-
-/* Define to the function return type for recvfrom. */
-#define RECVFROM_TYPE_RETV ssize_t
-
 /* Define if you have the send function. */
 #define HAVE_SEND 1