Presume ISO C90 headers are always available

This includes <assert.h>, <ctype.h>, <errno.h>, <float.h>, <iso646.h>,
<limits.h>, <locale.h>, <math.h>, <setjmp.h>, <signal.h>, <stdarg.h>,
<stddef.h>, <stdio.h>, <stdlib.h>, <string.h>, <time.h>, <wchar.h>,
and <wctype.h>.

* configure.ac: don't check for <limits.h>, <string.h>, <time.h>, <assert.h>.
   Remove AC_INCLUDES_DEFAULT macro
* libguile/bytevectors.c: include <limits.h>, remove HAVE_LIMITS_H
* libguile/filesys.c: include <string.h>, remove HAVE_STRING_H
* libguile/fports.c: include <string.h>, remove HAVE_STRING_H
* libguile/gen-scmconfig.c: remove HAVE_LIMITS_H, HAVE_TIME_H, STDC_HEADERS
    Remove SCM_HAVE_STDC_HEADERS
* libguile/hash.c: include <wchar.h>, remove HAVE_WCHAR_H
* libguile/net_db.c: include <string.h>, remove HAVE_STRING_H
* libguile/numbers.h: remove SCM_HAVE_STDC_HEADERS
* libguile/regex-posix.c: include <wchar.h>, remove HAVE_WCHAR_H
  (fixup_multibyte_match): always defined
  (scm_regexp_exec): use fixup_multibyte_match
* libguile/scmsigs.c: remove STDC_HEADERS
* libguile/socket.c: include <string.h>, remove HAVE_STRING_H
* test-suite/standalone/test-unwind.c: include <string.h>, remove HAVE_STRING_H

1 files changed, 1 insertions, 5 deletions

diff --git a/test-suite/standalone/test-unwind.c b/test-suite/standalone/test-unwind.c
index 33752cd22..48096732d 100644
--- a/test-suite/standalone/test-unwind.c
+++ b/test-suite/standalone/test-unwind.c
@@ -27,11 +27,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
-
-#ifdef HAVE_STRING_H
-# include <string.h>
-#endif
-
+#include <string.h>
 
 void set_flag (void *data);
 void func1 (void);