heed compiler warnings about checking non-defined variables in #if directives

libc/inet/getaddrinfo.c

@@ -716,9 +716,9 @@ gaih_inet(const char *name, const struct gaih_service *service,
 				(*pai)->ai_protocol = st2->protocol;
 				(*pai)->ai_addrlen = socklen;
 				(*pai)->ai_addr = (void *) (*pai) + sizeof(struct addrinfo);
-#if SALEN
+#if defined SALEN
 				(*pai)->ai_addr->sa_len = socklen;
-#endif /* SALEN */
+#endif
 				(*pai)->ai_addr->sa_family = family;
 
 #if defined __UCLIBC_HAS_IPV6__

libc/misc/fnmatch/fnmatch_old.c

@@ -15,7 +15,7 @@ License along with this library; see the file COPYING.LIB.  If
 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
 Cambridge, MA 02139, USA.  */
 
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif
 

libc/misc/ftw/ftw.c

@@ -105,11 +105,11 @@ char *alloca ();
 /* libc_hidden_proto(lstat) */
 /* libc_hidden_proto(stat) */
 
-#if ! _LIBC && !HAVE_DECL_STPCPY && !defined stpcpy
+#if !defined _LIBC && !HAVE_DECL_STPCPY && !defined stpcpy
 char *stpcpy ();
 #endif
 
-#if ! _LIBC && ! defined HAVE_MEMPCPY && ! defined mempcpy
+#if !defined _LIBC && ! defined HAVE_MEMPCPY && ! defined mempcpy
 /* Be CAREFUL that there are no side effects in N.  */
 # define mempcpy(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N)))
 #endif
@@ -162,7 +162,7 @@ extern char *xgetcwd (void);
 /* Arrange to make lstat calls go through the wrapper function
    on systems with an lstat function that does not dereference symlinks
    that are specified with a trailing slash.  */
-#if ! _LIBC && ! LSTAT_FOLLOWS_SLASHED_SYMLINK && !defined __UCLIBC__
+#if !defined _LIBC && !defined LSTAT_FOLLOWS_SLASHED_SYMLINK && !defined __UCLIBC__
 int rpl_lstat (const char *, struct stat *);
 # undef lstat
 # define lstat(Name, Stat_buf) rpl_lstat(Name, Stat_buf)

libc/misc/regex/regex_old.c

@@ -120,7 +120,7 @@
 # endif
 
 /* This is for other GNU distributions with internationalized messages.  */
-# if HAVE_LIBINTL_H || defined _LIBC
+# if defined HAVE_LIBINTL_H || defined _LIBC
 #  include <libintl.h>
 #  ifdef _LIBC
 #   undef gettext
@@ -208,7 +208,7 @@ char *realloc ();
 
 # endif /* not emacs */
 
-# if defined _LIBC || HAVE_LIMITS_H
+# if defined _LIBC || defined HAVE_LIMITS_H
 #  include <limits.h>
 # endif
 
@@ -2230,7 +2230,7 @@ typedef struct
   }
 
 # ifndef DEFINED_ONCE
-#  if defined _LIBC || WIDE_CHAR_SUPPORT
+#  if defined _LIBC || defined WIDE_CHAR_SUPPORT
 /* The GNU C library provides support for user-defined character classes
    and the functions from ISO C amendement 1.  */
 #   ifdef CHARCLASS_NAME_MAX
@@ -3286,7 +3286,7 @@ PREFIX(regex_compile) (
                        the leading `:' and `[' (but set bits for them).  */
                     if (c == ':' && *p == ']')
                       {
-# if defined _LIBC || WIDE_CHAR_SUPPORT
+# if defined _LIBC || defined WIDE_CHAR_SUPPORT
                         boolean is_lower = STREQ (str, "lower");
                         boolean is_upper = STREQ (str, "upper");
 			wctype_t wt;
@@ -4542,7 +4542,7 @@ byte_compile_range (
   unsigned this_char;
   const char *p = *p_ptr;
   reg_errcode_t ret;
-# if _LIBC
+# ifdef _LIBC
   const unsigned char *collseq;
   unsigned int start_colseq;
   unsigned int end_colseq;
@@ -4560,7 +4560,7 @@ byte_compile_range (
   /* Report an error if the range is empty and the syntax prohibits this.  */
   ret = syntax & RE_NO_EMPTY_RANGES ? REG_ERANGE : REG_NOERROR;
 
-# if _LIBC
+# ifdef _LIBC
   collseq = (const unsigned char *) _NL_CURRENT (LC_COLLATE,
 						 _NL_COLLATE_COLLSEQMB);
 

libpthread/linuxthreads.old/attr.c

@@ -61,7 +61,7 @@ int pthread_attr_init(pthread_attr_t *attr)
 libpthread_hidden_def(pthread_attr_init)
 
 /* uClibc: leave out this for now. */
-#if DO_PTHREAD_VERSIONING_WITH_UCLIBC
+#if defined DO_PTHREAD_VERSIONING_WITH_UCLIBC
 #if defined __PIC__ && defined DO_VERSIONING
 default_symbol_version (__pthread_attr_init_2_1, pthread_attr_init, GLIBC_2.1);
 

libpthread/linuxthreads.old/pthread.c

@@ -321,7 +321,7 @@ libpthread_hidden_proto(pthread_condattr_init)
 
 struct pthread_functions __pthread_functions =
   {
-#if !(USE_TLS && HAVE___THREAD)
+#if !(defined USE_TLS && HAVE___THREAD)
     .ptr_pthread_internal_tsd_set = __pthread_internal_tsd_set,
     .ptr_pthread_internal_tsd_get = __pthread_internal_tsd_get,
     .ptr_pthread_internal_tsd_address = __pthread_internal_tsd_address,

libpthread/linuxthreads.old/specific.c

@@ -167,7 +167,7 @@ void __pthread_destroy_specifics(void)
     __pthread_unlock(THREAD_GETMEM(self, p_lock));
 }
 
-#if !(USE_TLS && HAVE___THREAD)
+#if !(defined USE_TLS && HAVE___THREAD)
 
 /* Thread-specific data for libc. */