have configure check/add --gc-sections linker option

[musl] / configure

diff --git a/configure b/configure
index d04c860..dece1d0 100755 (executable)
--- 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