Add comment about necessity of adding SDK paths to compiler flags
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@ -1629,6 +1629,9 @@ use_xcode_sdk_zlib() {
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local xc_sdk_path="$(xcrun --show-sdk-path 2>/dev/null || true)"
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local xc_sdk_path="$(xcrun --show-sdk-path 2>/dev/null || true)"
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if [ -d "$xc_sdk_path" ]; then
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if [ -d "$xc_sdk_path" ]; then
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echo "python-build: use zlib from xcode sdk"
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echo "python-build: use zlib from xcode sdk"
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# Even though SDK's compiler uses the SDK dirs implicitly,
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# CPython's setup.py has to have nonstandard paths specified explicitly
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# to search for zlib.h in them
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export CPPFLAGS="${CPPFLAGS:+$CPPFLAGS }-I${xc_sdk_path}/usr/include"
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export CPPFLAGS="${CPPFLAGS:+$CPPFLAGS }-I${xc_sdk_path}/usr/include"
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if is_mac -ge 1100; then
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if is_mac -ge 1100; then
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export LDFLAGS="${LDFLAGS:+$LDFLAGS }-L${xc_sdk_path}/usr/lib"
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export LDFLAGS="${LDFLAGS:+$LDFLAGS }-L${xc_sdk_path}/usr/lib"
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