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--- a/hints/linux.sh +++ b/hints/linux.sh @@ -133,6 +133,24 @@ case "$optimize" in ;; esac +# Ubuntu 11.04 (and later, presumably) doesn't keep most libraries +# (such as -lm) in /lib or /usr/lib. So we have to ask gcc to tell us +# where to look. We don't want gcc's own libraries, however, so we +# filter those out. +# This could be conditional on Unbuntu, but other distributions may +# follow suit, and this scheme seems to work even on rather old gcc's. +# This unconditionally uses gcc because even if the user is using another +# compiler, we still need to find the math library and friends, and I don't +# know how other compilers will cope with that situation. +# Still, as an escape hatch, allow Configure command line overrides to +# plibpth to bypass this check. +case "$plibpth" in +'') plibpth=`gcc -print-search-dirs | grep libraries | + cut -f2- -d= | tr ':' $trnl | grep -v 'gcc'` + plibpth="$plibpth" # Collapse all entries on one line + ;; +esac + # Are we using ELF? Thanks to Kenneth Albanowski <email@example.com> # for this test. cat >try.c <<'EOM'