If $CC has --sysroot=/, it is a valid configuration however libtool will
then set lt_sysroot to "/".
This means references like $lt_sysroot$libdir become //usr/lib instead
of the more normally expected /usr/lib. This may or may not break something
but certainly is confusing to the user and gives confusing output. Making
"/" simply unset lt_sysroot is much cleaner.
* m4/libtool.m4: Improve '/' sysroot handling
---
m4/libtool.m4 | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/m4/libtool.m4 b/m4/libtool.m4
index 695ccac4..1c8ea182 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -1256,6 +1256,10 @@ case $with_sysroot in #(
yes)
if test yes = "$GCC"; then
lt_sysroot=`$CC --print-sysroot 2>/dev/null`
+ # Treat "/" the same a an unset sysroot to avoid ugly // expansion for
$lt_sysroot$libdir
+ if test "$lt_sysroot" = /; then
+ lt_sysroot=
+ fi
fi
;; #(
/*)
--
2.39.2
