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redoconf: move -Wl,-rpath flags to shlib.rc and add -Wl,-z,origin.

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It was kind of ugly to have this kind of special flag directly in
link.od; now we detect whether it's available.  This also gives a
project the ability to override the flag in some other way if they
want.

As a result, rc/shlib.rc needs to be included in all.rc.od if you want
to create or link against shared libraries.

While we're here, also add -Wl,-z,origin on platforms where it works.
This is apparently needed for FreeBSD 8.0 at least, and probably other
platforms.

Reported-by: Wayne Scott <wsc9tt@gmail.com>
This commit is contained in:
Avery Pennarun 2019-03-01 13:38:25 -05:00
commit 88250334da
4 changed files with 24 additions and 6 deletions
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8
redoconf/link-shlib.od
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@ -1,5 +1,5 @@
. ./redoconf.rc
rc_include _all.rc rc/shlib.rc
rc_include _all.rc
# Tricky quoting: see _compile.od for details.
if [ "$HAVE_SHLIB" = UNIX ]; then
@ -40,6 +40,12 @@ elif [ "$HAVE_SHLIB" = MACOS ]; then
\$LIBS
EOF
else
if [ -z "$HAVE_SHLIB" ]; then
echo "link-shlib.od: fatal:" \
"must include rc/shlib.rc to use shared libraries." >&2
exit 90
fi
# If no shared library support and we try to build one,
# compensate by building a static library instead in the
# same place.