android/build.py: enable function/data sections in static libraries

.. and make all library symbols hidden by default. Saves big amounts of .text section size with --gc-sections, because only this allows discarding unused functions from those (static) third-party libraries.

android/build.py: enable function/data sections in static libraries
5724656a · Max Kellermann · 329f9cd9 · 5724656a
Commit 5724656a authored Jan 04, 2018 by Max Kellermann
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build.py android/build.py +2 -0

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--- a/android/build.py
+++ b/android/build.py
@@ -73,6 +73,8 @@ class AndroidNdkToolchain:
        self.cxx = os.path.join(llvm_bin, 'clang++')
        common_flags += ' -target ' + llvm_triple + ' -integrated-as -gcc-toolchain ' + toolchain_path

+        common_flags += ' -fvisibility=hidden -fdata-sections -ffunction-sections'
+
        self.ar = os.path.join(toolchain_bin, arch + '-ar')
        self.ranlib = os.path.join(toolchain_bin, arch + '-ranlib')
        self.nm = os.path.join(toolchain_bin, arch + '-nm')