[Libunwind-devel] [PATCH 13/19] Remove AC_FUNC_MEMCMP check from configure.in

[Tommi Rantala]

As far as I can tell, AC_FUNC_MEMCMP is useless for us. It checks for
some obscure `memcmp' bugs on some ancient systems, and gives us a
chance to provide a working `memcmp'. Since we're not shipping with a
local copy of a `memcmp', it makes no difference whether or not the test
fails. And when cross-compiling, the test automatically fails, as it
tries to compile and run a test program:

    checking for working memcmp... no

Quoting autoconf docs: ``This macro is obsolescent, as current systems
have a working memcmp. New programs need not use this macro.''
---
 configure.in |    1 -
 1 file changed, 1 deletion(-)

diff --git a/configure.in b/configure.in
index 0a7577b..2caceff 100644
--- a/configure.in
+++ b/configure.in
@@ -68,7 +68,6 @@ PT_STEP, PT_SYSCALL], [], [],
 ])
 
 dnl Checks for library functions.
-AC_FUNC_MEMCMP
 AC_CHECK_FUNCS(dl_iterate_phdr dl_phdr_removals_counter dlmodinfo getunwind \
                ttrace mincore)
 is_gcc_m64() {
-- 
1.7.9.5