[GNUnet-SVN] [gnurl] 50/163: configure: override AR_FLAGS to silence warning

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commit 5005ade2ce57e0e71439aa6639eb70414db949b8
Author: Daniel Stenberg <address@hidden>
AuthorDate: Tue May 29 10:26:06 2018 +0200

    configure: override AR_FLAGS to silence warning
    
    The automake default ar flags are 'cru', but the 'u' flag in there
    causes warnings on many modern Linux distros. Removing 'u' may have a
    minor performance impact on older distros but should not cause harm.
    
    Explained on the automake mailing list already back in April 2015:
    
    https://www.mail-archive.com/address@hidden/msg07705.html
    
    Reported-by: elephoenix on github
    Fixes #2617
    Closes #2619
---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 69a185044..f5f4e7717 100755
--- a/configure.ac
+++ b/configure.ac
@@ -188,7 +188,8 @@ AC_CANONICAL_HOST
 dnl Get system canonical name
 AC_DEFINE_UNQUOTED(OS, "${host}", [cpu-machine-OS])
 
-dnl Checks for programs.
+# Silence warning: ar: 'u' modifier ignored since 'D' is the default
+AC_SUBST(AR_FLAGS, [cr])
 
 dnl This defines _ALL_SOURCE for AIX
 CURL_CHECK_AIX_ALL_SOURCE

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