Add configure check to see whether <string.h> and <strings.h> may both be

included, and then include <strings.h> if so.  Several systems already
needed <strings.h> anyway.  Some new systems that claim to conform to the
Unix 9x "standard" do not declare str[n]casemp() in string.h, and C99
compilers will not like that.

config/c-library.m4

 # Macros that test various C library quirks
-# $Header: /cvsroot/pgsql/config/c-library.m4,v 1.4 2000/10/02 03:58:31 momjian Exp $
+# $Header: /cvsroot/pgsql/config/c-library.m4,v 1.5 2000/11/03 18:43:51 petere Exp $
 
 
 # PGAC_VAR_INT_TIMEZONE
@@ -96,3 +96,30 @@ if test x"$pgac_cv_func_posix_signals" = xyes ; then
 fi
 HAVE_POSIX_SIGNALS=$pgac_cv_func_posix_signals
 AC_SUBST(HAVE_POSIX_SIGNALS)])# PGAC_FUNC_POSIX_SIGNALS
+
+
+# PGAC_HEADER_STRING
+# ------------------
+# Tests whether <string.h> and <strings.h> can both be included
+# (without generating warnings).  This is mostly useful if you need
+# str[n]casecmp(), since this is not in the "standard" <string.h>
+# on some systems.
+AC_DEFUN([PGAC_HEADER_STRING],
+[AC_CACHE_CHECK([whether string.h and strings.h may both be included],
+                [pgac_cv_header_strings_both],
+[AC_TRY_CPP(
+[#include <string.h>
+#include <strings.h>
+],
+[AC_TRY_COMPILE(
+[#include <string.h>
+#include <strings.h>
+],
+[int n = strcasecmp("a", "b");],
+[pgac_cv_header_strings_both=yes],
+[pgac_cv_header_strings_both=no])],
+[pgac_cv_header_strings_both=no])])
+if test x"$pgac_cv_header_strings_both" = x"yes"; then
+  AC_DEFINE([STRING_H_WITH_STRINGS_H], 1,
+            [Define if string.h and strings.h may both be included])
+fi])

configure.in

@@ -694,6 +694,8 @@ AC_TRY_CPP([
 ], [AC_DEFINE(HAVE_NETINET_TCP_H) AC_MSG_RESULT(yes)],
 [AC_MSG_RESULT(no)])
 
+PGAC_HEADER_STRING
+
 AC_CHECK_HEADERS([readline/readline.h readline.h], [break])
 AC_CHECK_HEADERS([readline/history.h history.h], [break])
 

src/include/c.h

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: c.h,v 1.84 2000/10/03 03:11:22 momjian Exp $
+ * $Id: c.h,v 1.85 2000/11/03 18:43:52 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -51,6 +51,9 @@
 #include <string.h>
 #include <stddef.h>
 #include <stdarg.h>
+#ifdef STRING_H_WITH_STRINGS_H
+#include <strings.h>
+#endif
 
 #ifdef __CYGWIN__
 #include <errno.h>

src/include/config.h.in

@@ -8,7 +8,7 @@
  * or in config.h afterwards.  Of course, if you edit config.h, then your
  * changes will be overwritten the next time you run configure.
  *
- * $Id: config.h.in,v 1.145 2000/10/30 07:17:31 ishii Exp $
+ * $Id: config.h.in,v 1.146 2000/11/03 18:43:52 petere Exp $
  */
 
 #ifndef CONFIG_H
@@ -374,6 +374,9 @@
 /* Set to 1 if you have <sys/pstat.h> */
 #undef HAVE_SYS_PSTAT_H
 
+/* Define if string.h and strings.h may both be included */
+#undef STRING_H_WITH_STRINGS_H
+
 /* Define if you have the setproctitle function.  */
 #undef HAVE_SETPROCTITLE
 

src/include/port/sco.h

@@ -11,12 +11,6 @@
 
 typedef unsigned char slock_t;
 
-/***************************************************************
- * The following include will get the needed prototype for the
- * strcasecmp() function.
- ***************************************************************/
-#include <strings.h>
-
 #ifndef			BIG_ENDIAN
 #define			BIG_ENDIAN		4321
 #endif

src/include/port/univel.h

@@ -11,12 +11,6 @@ typedef unsigned char slock_t;
 
 #define DISABLE_COMPLEX_MACRO
 
-/***************************************************************
- * strcasecmp() is in c89.a. The following include will get the
- * needed prototype.
- ***************************************************************/
-#include <strings.h>
-
 #ifndef			BIG_ENDIAN
 #define			BIG_ENDIAN		4321
 #endif

src/include/port/unixware.h

@@ -14,12 +14,6 @@ typedef unsigned char slock_t;
 
 #define DISABLE_COMPLEX_MACRO
 
-/***************************************************************
- * The following include will get the needed prototype for the
- * strcasecmp() function.
- ***************************************************************/
-#include <strings.h>
-
 #ifndef			BIG_ENDIAN
 #define			BIG_ENDIAN		4321
 #endif