path: root/configure
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authorRich Felker <>2015-11-04 21:40:36 -0500
committerRich Felker <>2015-11-04 21:40:36 -0500
commit6a851e3ab8a1ae524b2aa6218615ec1c86528e9c (patch)
treecdd197834c833b4a5a050c7b2bb12826484e9397 /configure
parent2efd38e8c70f00ca6bbc1eb5199aa507d45436cf (diff)
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.
Diffstat (limited to 'configure')
1 files changed, 4 insertions, 0 deletions
diff --git a/configure b/configure
index d04c860a..dece1d09 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