Mailing List Archive

commit b9ad91e258fca26fab04ae26237c7e19fb99dcfd
Author: Dridi Boukelmoune <dridi.boukelmoune@gmail.com>
Date: Fri Nov 12 17:10:28 2021 +0100

build: Use libunwind if available at configure time

One can still use the --without-unwind configure flag.

Refs #3717

diff --git a/configure.ac b/configure.ac
index e5df08ab3..e61cc2730 100644
--- a/configure.ac
+++ b/configure.ac
@@ -369,17 +369,26 @@ AC_CHECK_FUNCS([setproctitle])
# if the default libexecinfo on alpine causes issues, you can use libunwind
AC_ARG_WITH([unwind],
[AS_HELP_STRING([--with-unwind],
- [.use libunwind to print stacktraces (use libexecinfo otherwise). Recommended on alpine linux. Defaults to no.])])
+ [.use libunwind to print stacktraces (use libexecinfo otherwise). Recommended on alpine linux. Defaults to auto.])])

-if test "$with_unwind" = yes; then
+if test "$with_unwind" != no; then
case $target in
*-*-darwin*)
# Always present but .pc is not installed
+ have_unwind=yes
;;
*)
- PKG_CHECK_MODULES([LIBUNWIND], [libunwind])
+ PKG_CHECK_MODULES([LIBUNWIND], [libunwind], [have_unwind=yes],
+ [have_unwind=no])
;;
esac
+fi
+
+if test "$with_unwind" = yes && test "$have_unwind" != yes; then
+ AC_MSG_ERROR([Could not find libunwind])
+fi
+
+if test "$have_unwind" = yes; then
AC_DEFINE([WITH_UNWIND], [1],
[Define to 1 to use libunwind instead of libexecinfo])
else
@@ -388,8 +397,7 @@ else
])
fi

-AM_CONDITIONAL([WITH_UNWIND],
- [test "$with_unwind" = yes])
+AM_CONDITIONAL([WITH_UNWIND], [test "$have_unwind" = yes])

# white lie - we don't actually test it
AC_MSG_CHECKING([whether daemon() works])
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