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libbacktrace patch committed: Declare strnlen if not declared
- From: Ian Lance Taylor <iant at google dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Tue, 18 Sep 2012 09:07:10 -0700
- Subject: libbacktrace patch committed: Declare strnlen if not declared
This patch to libbacktrace declares strnlen if it is not declared in a
standard header file. If necessary, the actual definition will come
from libiberty. Bootstrapped on x86_64-unknown-linux-gnu. Committed to
mainline.
Ian
2012-09-18 Ian Lance Taylor <iant@google.com>
* configure.ac: Check whether strnlen is declared.
* dwarf.c: Declare strnlen if not declared.
Index: dwarf.c
===================================================================
--- dwarf.c (revision 191432)
+++ dwarf.c (working copy)
@@ -44,6 +44,11 @@ POSSIBILITY OF SUCH DAMAGE. */
#include "backtrace.h"
#include "internal.h"
+#ifndef HAVE_DECL_STRNLEN
+/* The function is defined in libiberty if needed. */
+extern size_t strnlen (const char *, size_t);
+#endif
+
/* A buffer to read DWARF info. */
struct dwarf_buf
Index: configure.ac
===================================================================
--- configure.ac (revision 191432)
+++ configure.ac (working copy)
@@ -199,6 +199,8 @@ if test "$ALLOC_FILE" = "alloc.lo"; then
fi
AC_SUBST(BACKTRACE_USES_MALLOC)
+AC_CHECK_DECLS(strnlen)
+
AC_CACHE_CHECK([whether tests can run],
[libbacktrace_cv_sys_native],
[AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])],