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Build: test if hard links are really working 

The AFS filesystem does not allow hard links between files in different directories. We fall back to symbolic links in that case.
This commit is contained in:
Christian Beer 2017-04-11 15:16:08 +02:00
parent 6e8c453460
commit 6e8c08b38f
1 changed files with 8 additions and 7 deletions
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15
m4/sah_links.m4
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@ -2,16 +2,19 @@ AC_DEFUN([SAH_LINKS],[
AC_PATH_PROGS(LN,[ln cp copy])
if test -n "$LN" ; then
AC_MSG_CHECKING(whether '$LN' works)
if $LN ${ac_aux_dir}/config.sub erase.me$$ && \
mkdir -p lntest
cp ${ac_aux_dir}/config.sub lntest/
if $LN lntest/config.sub erase.me$$ && \
test -e erase.me$$ && \
diff ${ac_aux_dir}/config.sub erase.me$$ >/dev/null 2>&5
diff lntest/config.sub erase.me$$ >/dev/null 2>&5
then
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
LN=cp
fi
/bin/rm erase.me$$
/bin/rm erase.me$$ lntest/config.sub
/bin/rmdir ln_test
else
LN=cp
fi
@ -20,7 +23,7 @@ AC_DEFUN([SAH_LINKS],[
AC_MSG_CHECKING(whether '$LN_S' really works or whether I'm deluding myself)
if $LN_S ${ac_aux_dir}/config.sub erase.me$$ && \
test -e erase.me$$ && \
diff ${ac_aux_dir}/config.sub erase.me$$ >/dev/null 2>&5
diff ${ac_aux_dir}/config.sub erase.me$$ >/dev/null 2>&5
then
AC_MSG_RESULT(it works)
else
@ -31,6 +34,4 @@ AC_DEFUN([SAH_LINKS],[
else
LN_S=cp
fi
])
])