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From 6a851e3ab8a1ae524b2aa6218615ec1c86528e9c Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Wed, 4 Nov 2015 21:40:36 -0500
Subject: [PATCH] have configure check/add --gc-sections linker option
this allowing the linker to drop certain weak definitions that are
only used as dummies for static linking. they could be eliminated for
shared library builds using the preprocessor instead, but we are
trying to transition to using the same object files for shared and
static libc, so a link-time solution is preferable.
---
configure | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/configure b/configure
index d04c860..dece1d0 100755
--- a/configure
+++ b/configure
@@ -521,6 +521,10 @@ fi
tryldflag LDFLAGS_AUTO -Wl,--sort-section,alignment
tryldflag LDFLAGS_AUTO -Wl,--sort-common
+# When linking shared library, drop dummy weak definitions that were
+# replaced by strong definitions from other translation units.
+tryldflag LDFLAGS_AUTO -Wl,--gc-sections
+
# Some patched GCC builds have these defaults messed up...
tryldflag LDFLAGS_AUTO -Wl,--hash-style=both
--
2.7.0
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