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diff README @ 14186:cd4635d4dbe6

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assume <ctype.h>, ..., <time.h> exist For years gnulib has been assuming the existence of the headers <ctime.h>, <errno.h>, <fcntl.h>, <locale.h>, <signal.h>, <stdio.h>, <stdlib.h>, <string.h>, and <time.h>. Omit checks for them, since they don't appear to be needed. * README (Portability guidelines): Document this. * lib/flock.c: Assume <fcntl.h> exists. * lib/regex_internal.h: Assume <locale.h> exists. * m4/ctype.m4 (gl_CTYPE_H): Assume <ctype.h> exists. * m4/errno_h.m4 (gl_HEADER_ERRNO_H): Assume <errno.h> exists. * m4/fcntl_h.m4 (gl_FCNTL_H): Assume <fcntl.h> exists. * m4/flock.m4 (gl_PREREQ_FLOCK): Likewise. * m4/locale_h.m4 (gl_LOCALE_H): Assume <locale.h> exists. * m4/regex.m4 (gl_REGEX): Likewise. * m4/signal_h.m4 (gl_SIGNAL_H): Assume <signal.h> exists. * m4/stdio_h.m4 (gl_STDIO_H): Assume <stdio.h> exists. * m4/stdlib_h.m4 (gl_STDLIB_H): Assume <stdlib.h> exists. * m4/string_h.m4 (gl_STRING_H): Assume <string.h> exists. * tests/test-argp.c: Likewise. * m4/time_h.m4 (gl_HEADER_TIME_H_BODY): Assume <time.h> exists.
author Paul Eggert <eggert@cs.ucla.edu>
date Wed, 19 Jan 2011 22:15:41 -0800
parents 97fc9a21a8fb
children e2175e5db896
line wrap: on
line diff
--- a/README
+++ b/README
@@ -221,13 +221,16 @@
 
 Because we assume a freestanding C89 compiler, Gnulib code can include
 <float.h>, <limits.h>, <stdarg.h>, and <stddef.h> unconditionally.  It
-can also include hosted headers like <errno.h> that were present in
-Unix Version 7 and are thus widely available.  Similarly, many modules
-include <sys/types.h> even though it's not even in C99; that's OK
-since <sys/types.h> has been around nearly forever.  <string.h> and
+can also assume the existence of <ctime.h>, <errno.h>, <fcntl.h>,
+<locale.h>, <signal.h>, <stdio.h>, <stdlib.h>, <string.h>, and
+<time.h>.  Some of these headers, such as <errno.h>, were present in
+Unix Version 7 and are thus widely available.  <string.h> and
 <stdlib.h> were not in Unix Version 7, so they weren't universally
 available on ancient hosts, but they are both in SunOS 4 (the oldest
 platform still in relatively-common use) so Gnulib assumes them now.
+Similarly, many modules include <sys/types.h> even though it's not
+even in C99; that's OK since <sys/types.h> has been around nearly
+forever.
 
 Even if the include files exist, they may not conform to C89.
 However, GCC has a "fixincludes" script that attempts to fix most