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Ignore -flto=* CFLAGS #210

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Merged
yutannihilation merged 4 commits into from
Apr 14, 2026
Merged

Ignore -flto=* CFLAGS #210

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5f64d4a
Add -flto=10 to check if this fails
yutannihilation Apr 14, 2026
065fa58
Revert
yutannihilation Apr 14, 2026
d9a9f9f
Fix
yutannihilation Apr 14, 2026
05ef279
Tweak
yutannihilation Apr 14, 2026
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7 changes: 6 additions & 1 deletion src/Makevars.in
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Original file line number Diff line number Diff line change
Expand Up @@ -20,8 +20,13 @@ $(STATLIB):
cp ./cargo_vendor_config.toml ./rust/.cargo/config.toml; \
fi

# Note: -fno-lto is appended to CFLAGS to override any -flto* injected by R
# (e.g. the gcc-SAN builder uses -flto=10). The cc crate compiles savvy's
# unwind_protect_wrapper.c with these CFLAGS and archives the result with
# plain `ar`, which doesn't record GCC LTO symbols, leaving
# unwind_protect_impl undefined at dyn.load time.
export CC="$(CC)" && \
export CFLAGS="$(CFLAGS)" && \
export CFLAGS="$(CFLAGS) -fno-lto" && \
if [ "$(TARGET)" != "wasm32-unknown-emscripten" ]; then \
@BEFORE_CARGO_BUILD@ cd ./rust && cargo build --jobs 1 --lib --release $(OFFLINE_OPTION); \
else \
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