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have configure check/add linker options to reduce size lost to padding

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based on patch by Denys Vlasenko. sorting sections and common data
symbols by alignment acts as an approximation for optimal packing,
which the linker does not actually support.
This commit is contained in:
Rich Felker 2015-11-04 21:39:13 -05:00
parent 27c1eccf33
commit 2efd38e8c7
1 changed files with 6 additions and 0 deletions
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6
configure vendored
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@ -515,6 +515,12 @@ CFLAGS_AUTO="$CFLAGS_AUTO -include vis.h"
CFLAGS_AUTO="${CFLAGS_AUTO# }"
fi
# Reduce space lost to padding for alignment purposes by sorting data
# objects according to their alignment reqirements. This approximates
# optimal packing.
tryldflag LDFLAGS_AUTO -Wl,--sort-section,alignment
tryldflag LDFLAGS_AUTO -Wl,--sort-common
# Some patched GCC builds have these defaults messed up...
tryldflag LDFLAGS_AUTO -Wl,--hash-style=both