From e3a4ee9f0b4bf7f11cf2cb5063d756274f5cf98f Mon Sep 17 00:00:00 2001 From: Thomas Schwinge Date: Sun, 24 Oct 2010 12:24:08 +0200 Subject: open_issues/glibc_madvise_vs_static_linking: New. --- open_issues/glibc_madvise_vs_static_linking.mdwn | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 open_issues/glibc_madvise_vs_static_linking.mdwn diff --git a/open_issues/glibc_madvise_vs_static_linking.mdwn b/open_issues/glibc_madvise_vs_static_linking.mdwn new file mode 100644 index 00000000..4546348e --- /dev/null +++ b/open_issues/glibc_madvise_vs_static_linking.mdwn @@ -0,0 +1,24 @@ +[[!meta copyright="Copyright © 2010 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled [[GNU Free Documentation +License|/fdl]]."]]"""]] + +[[!tag open_issue_glibc]] + + $ echo 'int main() {}' | gcc -o /dev/null -static -x c - + /usr/lib/gcc/i486-gnu/4.4.5/../../../libcrt.a(malloc.o): In function `_int_free': + (.text+0xdc3): warning: warning: madvise is not implemented and will always fail + +This is correct, but it does confuse GNU Autoconf, for example, which then +thinks that static linking is not supported and sets a flag accordingly, which +luckly no / not many packages use. + +*This call does not influence the semantics of the application (except in the +case of MADV_DONTNEED), but may influence its performance. The kernel is free +to ignore the advice.* (`man madvise`), so we may simply want to turn it into a +no-op in glibc, avoiding the link-time warning. -- cgit v1.2.3