Simplify ifdef checks in programs/x509
diff --git a/programs/x509/cert_app.c b/programs/x509/cert_app.c
index 139a9a2..72f69ba 100644
--- a/programs/x509/cert_app.c
+++ b/programs/x509/cert_app.c
@@ -34,11 +34,22 @@
 #define polarssl_printf     printf
 #endif
 
-#if defined(POLARSSL_BIGNUM_C) && defined(POLARSSL_ENTROPY_C) && \
-    defined(POLARSSL_SSL_TLS_C) && defined(POLARSSL_SSL_CLI_C) && \
-    defined(POLARSSL_NET_C) && defined(POLARSSL_RSA_C) && \
-    defined(POLARSSL_X509_CRT_PARSE_C) && defined(POLARSSL_FS_IO) && \
-    defined(POLARSSL_CTR_DRBG_C)
+#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_ENTROPY_C) ||  \
+    !defined(POLARSSL_SSL_TLS_C) || !defined(POLARSSL_SSL_CLI_C) || \
+    !defined(POLARSSL_NET_C) || !defined(POLARSSL_RSA_C) ||         \
+    !defined(POLARSSL_X509_CRT_PARSE_C) || !defined(POLARSSL_FS_IO) ||  \
+    !defined(POLARSSL_CTR_DRBG_C)
+int main( void )
+{
+    polarssl_printf("POLARSSL_BIGNUM_C and/or POLARSSL_ENTROPY_C and/or "
+           "POLARSSL_SSL_TLS_C and/or POLARSSL_SSL_CLI_C and/or "
+           "POLARSSL_NET_C and/or POLARSSL_RSA_C and/or "
+           "POLARSSL_X509_CRT_PARSE_C and/or POLARSSL_FS_IO and/or "
+           "POLARSSL_CTR_DRBG_C not defined.\n");
+    return( 0 );
+}
+#else
+
 #include "polarssl/entropy.h"
 #include "polarssl/ctr_drbg.h"
 #include "polarssl/net.h"
@@ -48,7 +59,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#endif
 
 #define MODE_NONE               0
 #define MODE_FILE               1
@@ -84,21 +94,6 @@
     "    permissive=%%d       default: 0 (disabled)\n"  \
     "\n"
 
-#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_ENTROPY_C) ||  \
-    !defined(POLARSSL_SSL_TLS_C) || !defined(POLARSSL_SSL_CLI_C) || \
-    !defined(POLARSSL_NET_C) || !defined(POLARSSL_RSA_C) ||         \
-    !defined(POLARSSL_X509_CRT_PARSE_C) || !defined(POLARSSL_FS_IO) ||  \
-    !defined(POLARSSL_CTR_DRBG_C)
-int main( void )
-{
-    polarssl_printf("POLARSSL_BIGNUM_C and/or POLARSSL_ENTROPY_C and/or "
-           "POLARSSL_SSL_TLS_C and/or POLARSSL_SSL_CLI_C and/or "
-           "POLARSSL_NET_C and/or POLARSSL_RSA_C and/or "
-           "POLARSSL_X509_CRT_PARSE_C and/or POLARSSL_FS_IO and/or "
-           "POLARSSL_CTR_DRBG_C not defined.\n");
-    return( 0 );
-}
-#else
 /*
  * global options
  */
diff --git a/programs/x509/cert_req.c b/programs/x509/cert_req.c
index 83766ea..8a545a4 100644
--- a/programs/x509/cert_req.c
+++ b/programs/x509/cert_req.c
@@ -33,9 +33,19 @@
 #define polarssl_printf     printf
 #endif
 
-#if defined(POLARSSL_X509_CSR_WRITE_C) && defined(POLARSSL_FS_IO) && \
-    defined(POLARSSL_PK_PARSE_C) && \
-    defined(POLARSSL_ENTROPY_C) && defined(POLARSSL_CTR_DRBG_C)
+#if !defined(POLARSSL_X509_CSR_WRITE_C) || !defined(POLARSSL_FS_IO) ||  \
+    !defined(POLARSSL_PK_PARSE_C) ||                                    \
+    !defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_CTR_DRBG_C)
+int main( void )
+{
+    polarssl_printf( "POLARSSL_X509_CSR_WRITE_C and/or POLARSSL_FS_IO and/or "
+            "POLARSSL_PK_PARSE_C and/or "
+            "POLARSSL_ENTROPY_C and/or POLARSSL_CTR_DRBG_C "
+            "not defined.\n");
+    return( 0 );
+}
+#else
+
 #include "polarssl/x509_csr.h"
 #include "polarssl/entropy.h"
 #include "polarssl/ctr_drbg.h"
@@ -44,7 +54,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#endif
 
 #define DFL_FILENAME            "keyfile.key"
 #define DFL_DEBUG_LEVEL         0
@@ -80,18 +89,6 @@
     "                          object_signing_ca\n"     \
     "\n"
 
-#if !defined(POLARSSL_X509_CSR_WRITE_C) || !defined(POLARSSL_FS_IO) ||  \
-    !defined(POLARSSL_PK_PARSE_C) ||                                    \
-    !defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_CTR_DRBG_C)
-int main( void )
-{
-    polarssl_printf( "POLARSSL_X509_CSR_WRITE_C and/or POLARSSL_FS_IO and/or "
-            "POLARSSL_PK_PARSE_C and/or "
-            "POLARSSL_ENTROPY_C and/or POLARSSL_CTR_DRBG_C "
-            "not defined.\n");
-    return( 0 );
-}
-#else
 /*
  * global options
  */
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index 5653da2..629051b 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -33,10 +33,20 @@
 #define polarssl_printf     printf
 #endif
 
-#if defined(POLARSSL_X509_CRT_WRITE_C) && \
-    defined(POLARSSL_X509_CRT_PARSE_C) && defined(POLARSSL_FS_IO) && \
-    defined(POLARSSL_ENTROPY_C) && defined(POLARSSL_CTR_DRBG_C) && \
-    defined(POLARSSL_ERROR_C)
+#if !defined(POLARSSL_X509_CRT_WRITE_C) ||                                  \
+    !defined(POLARSSL_X509_CRT_PARSE_C) || !defined(POLARSSL_FS_IO) ||      \
+    !defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_CTR_DRBG_C) ||        \
+    !defined(POLARSSL_ERROR_C)
+int main( void )
+{
+    polarssl_printf( "POLARSSL_X509_CRT_WRITE_C and/or POLARSSL_X509_CRT_PARSE_C and/or "
+            "POLARSSL_FS_IO and/or "
+            "POLARSSL_ENTROPY_C and/or POLARSSL_CTR_DRBG_C and/or "
+            "POLARSSL_ERROR_C not defined.\n");
+    return( 0 );
+}
+#else
+
 #include "polarssl/x509_crt.h"
 #include "polarssl/x509_csr.h"
 #include "polarssl/entropy.h"
@@ -46,7 +56,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#endif
 
 #if defined(POLARSSL_X509_CSR_PARSE_C)
 #define USAGE_CSR                                                           \
@@ -120,19 +129,6 @@
     "                          object_signing_ca\n"     \
     "\n"
 
-#if !defined(POLARSSL_X509_CRT_WRITE_C) ||                                  \
-    !defined(POLARSSL_X509_CRT_PARSE_C) || !defined(POLARSSL_FS_IO) ||      \
-    !defined(POLARSSL_ENTROPY_C) || !defined(POLARSSL_CTR_DRBG_C) ||        \
-    !defined(POLARSSL_ERROR_C)
-int main( void )
-{
-    polarssl_printf( "POLARSSL_X509_CRT_WRITE_C and/or POLARSSL_X509_CRT_PARSE_C and/or "
-            "POLARSSL_FS_IO and/or "
-            "POLARSSL_ENTROPY_C and/or POLARSSL_CTR_DRBG_C and/or "
-            "POLARSSL_ERROR_C not defined.\n");
-    return( 0 );
-}
-#else
 /*
  * global options
  */
diff --git a/programs/x509/crl_app.c b/programs/x509/crl_app.c
index ff80a3d..ecd5e67 100644
--- a/programs/x509/crl_app.c
+++ b/programs/x509/crl_app.c
@@ -33,14 +33,21 @@
 #define polarssl_printf     printf
 #endif
 
-#if defined(POLARSSL_BIGNUM_C) && defined(POLARSSL_RSA_C) && \
-    defined(POLARSSL_X509_CRL_PARSE_C) && defined(POLARSSL_FS_IO)
+#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_RSA_C) ||  \
+    !defined(POLARSSL_X509_CRL_PARSE_C) || !defined(POLARSSL_FS_IO)
+int main( void )
+{
+    polarssl_printf("POLARSSL_BIGNUM_C and/or POLARSSL_RSA_C and/or "
+           "POLARSSL_X509_CRL_PARSE_C and/or POLARSSL_FS_IO not defined.\n");
+    return( 0 );
+}
+#else
+
 #include "polarssl/x509_crl.h"
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#endif
 
 #define DFL_FILENAME            "crl.pem"
 #define DFL_DEBUG_LEVEL         0
@@ -51,15 +58,6 @@
     "    filename=%%s         default: crl.pem\n"      \
     "\n"
 
-#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_RSA_C) ||  \
-    !defined(POLARSSL_X509_CRL_PARSE_C) || !defined(POLARSSL_FS_IO)
-int main( void )
-{
-    polarssl_printf("POLARSSL_BIGNUM_C and/or POLARSSL_RSA_C and/or "
-           "POLARSSL_X509_CRL_PARSE_C and/or POLARSSL_FS_IO not defined.\n");
-    return( 0 );
-}
-#else
 /*
  * global options
  */
diff --git a/programs/x509/req_app.c b/programs/x509/req_app.c
index 1164fd6..31660f9 100644
--- a/programs/x509/req_app.c
+++ b/programs/x509/req_app.c
@@ -33,14 +33,21 @@
 #define polarssl_printf     printf
 #endif
 
-#if defined(POLARSSL_BIGNUM_C) && defined(POLARSSL_RSA_C) && \
-    defined(POLARSSL_X509_CSR_PARSE_C) && defined(POLARSSL_FS_IO)
+#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_RSA_C) ||  \
+    !defined(POLARSSL_X509_CSR_PARSE_C) || !defined(POLARSSL_FS_IO)
+int main( void )
+{
+    polarssl_printf("POLARSSL_BIGNUM_C and/or POLARSSL_RSA_C and/or "
+           "POLARSSL_X509_CSR_PARSE_C and/or POLARSSL_FS_IO not defined.\n");
+    return( 0 );
+}
+#else
+
 #include "polarssl/x509_csr.h"
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#endif
 
 #define DFL_FILENAME            "cert.req"
 #define DFL_DEBUG_LEVEL         0
@@ -51,15 +58,6 @@
     "    filename=%%s         default: cert.req\n"      \
     "\n"
 
-#if !defined(POLARSSL_BIGNUM_C) || !defined(POLARSSL_RSA_C) ||  \
-    !defined(POLARSSL_X509_CSR_PARSE_C) || !defined(POLARSSL_FS_IO)
-int main( void )
-{
-    polarssl_printf("POLARSSL_BIGNUM_C and/or POLARSSL_RSA_C and/or "
-           "POLARSSL_X509_CSR_PARSE_C and/or POLARSSL_FS_IO not defined.\n");
-    return( 0 );
-}
-#else
 /*
  * global options
  */