aclocal.m4 (libiberty_AC_DECLARE_ERRNO): New macro.

	* aclocal.m4 (libiberty_AC_DECLARE_ERRNO): New macro.
	* configure.in (libiberty_AC_DECLARE_ERRNO): Add check.
	* configure, config.in: Regenerate.
	* pexecute.c, strtol.c, strtoul.c: Declare errno if necessary.

From-SVN: r35199

libiberty/ChangeLog

 2000-07-23  Michael Sokolov  <msokolov@ivan.Harhan.ORG>
 
+	* aclocal.m4 (libiberty_AC_DECLARE_ERRNO): New macro.
+	* configure.in (libiberty_AC_DECLARE_ERRNO): Add check.
+	* configure, config.in: Regenerate.
+	* pexecute.c, strtol.c, strtoul.c: Declare errno if necessary.
+
 	* cp-demangle.c, mkstemps.c: #include <sys/types.h>.
 
 2000-07-21  Mike Stump  <mrs@wrs.com>

libiberty/aclocal.m4

@@ -69,3 +69,17 @@ if test $ac_cv_func_strncmp_works = no ; then
   LIBOBJS="$LIBOBJS strncmp.o"
 fi
 ])
+
+dnl See if errno must be declared even when <errno.h> is included.
+AC_DEFUN(libiberty_AC_DECLARE_ERRNO,
+[AC_CACHE_CHECK(whether errno must be declared, libiberty_cv_declare_errno,
+[AC_TRY_COMPILE(
+[#include <errno.h>],
+[int x = errno;],
+libiberty_cv_declare_errno=no,
+libiberty_cv_declare_errno=yes)])
+if test $libiberty_cv_declare_errno = yes
+then AC_DEFINE(NEED_DECLARATION_ERRNO, 1,
+  [Define if errno must be declared even when <errno.h> is included.])
+fi
+])

libiberty/config.in

@@ -231,3 +231,7 @@
 
 /* Define if you have the <unistd.h> header file.  */
 #undef HAVE_UNISTD_H
+
+/* Define if errno must be declared even when <errno.h> is included. */
+#undef NEED_DECLARATION_ERRNO
+

libiberty/configure.in

@@ -112,6 +112,8 @@ AC_SUBST_FILE(host_makefile_frag)
 AC_CHECK_HEADERS(sys/file.h sys/param.h stdlib.h string.h unistd.h strings.h sys/time.h sys/resource.h sys/stat.h sys/mman.h fcntl.h)
 AC_HEADER_SYS_WAIT
 
+libiberty_AC_DECLARE_ERRNO
+
 # This is the list of functions which libiberty will provide if they
 # are not available on the host.
 

libiberty/pexecute.c

@@ -29,6 +29,9 @@ Boston, MA 02111-1307, USA.  */
 
 #include <stdio.h>
 #include <errno.h>
+#ifdef NEED_DECLARATION_ERRNO
+extern int errno;
+#endif
 #ifdef HAVE_STRING_H
 #include <string.h>
 #endif

libiberty/strtol.c

@@ -31,6 +31,9 @@
 #include <limits.h>
 #include <ctype.h>
 #include <errno.h>
+#ifdef NEED_DECLARATION_ERRNO
+extern int errno;
+#endif
 #if 0
 #include <stdlib.h>
 #endif

libiberty/strtoul.c

@@ -31,6 +31,9 @@
 #include <limits.h>
 #include <ctype.h>
 #include <errno.h>
+#ifdef NEED_DECLARATION_ERRNO
+extern int errno;
+#endif
 #if 0
 #include <stdlib.h>
 #endif