diff options
Diffstat (limited to 'ares/acinclude.m4')
| -rw-r--r-- | ares/acinclude.m4 | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/ares/acinclude.m4 b/ares/acinclude.m4 index 64804dc95..9a5c7e775 100644 --- a/ares/acinclude.m4 +++ b/ares/acinclude.m4 @@ -826,3 +826,39 @@ else fi ]) +# Prevent libtool for checking how to run C++ compiler and check for other +# tools we don't want to use. We do this by m4-defining the _LT_AC_TAGCONFIG +# variable to the code to run, as by default it uses a much more complicated +# approach. The code below that is actually added seems to be used for cases +# where configure has trouble figuring out what C compiler to use but where +# the installed libtool has an idea. +# +# This function is a re-implemented version of the Paolo Bonzini fix posted to +# the c-ares mailing list by Bram Matthys on May 6 2006. My version removes +# redundant code but also adds the LTCFLAGS check that wasn't in that patch. +# +# Some code in this function was extracted from the generated configure script. +# +# CARES_CLEAR_LIBTOOL_TAGS +AC_DEFUN([CARES_CLEAR_LIBTOOL_TAGS], + [m4_define([_LT_AC_TAGCONFIG], [ + if test -f "$ltmain"; then + if test ! -f "${ofile}"; then + AC_MSG_WARN([output file `$ofile' does not exist]) + fi + + if test -z "$LTCC"; then + eval "`$SHELL ${ofile} --config | grep '^LTCC='`" + if test -z "$LTCC"; then + AC_MSG_WARN([output file `$ofile' does not look like a libtool +script]) + else + AC_MSG_WARN([using `LTCC=$LTCC', extracted from `$ofile']) + fi + fi + if test -z "$LTCFLAGS"; then + eval "`$SHELL ${ofile} --config | grep '^LTCFLAGS='`" + fi + fi + ])] +) |