--- /dev/null
+--- opensc-0.19.0/configure.ac~ 2018-09-13 13:52:42.000000000 +0200
++++ opensc-0.19.0/configure.ac 2021-10-04 22:28:33.902587661 +0200
+@@ -130,7 +130,6 @@
+ ;;
+ esac
+
+-AX_CHECK_COMPILE_FLAG(-Wunknown-warning-option, [have_unknown_warning_option="yes"], [have_unknown_warning_option="no"], [-Werror])
+ AM_CONDITIONAL([HAVE_UNKNOWN_WARNING_OPTION], [test "${have_unknown_warning_option}" = "yes"])
+
+ AC_ARG_ENABLE(
+@@ -1042,7 +1042,7 @@
+ CFLAGS="${CFLAGS} -pedantic"
+ fi
+ if test "${enable_strict}" = "yes"; then
+- CFLAGS="${CFLAGS} -Wall -Wextra -Wno-unused-parameter -Werror"
++ CFLAGS="${CFLAGS} -Wall -Wextra -Wno-unused-parameter"
+ fi
+
+ AC_CONFIG_FILES([
+--- opensc-0.19.0/m4/ax_pthread.m4~ 2018-09-13 13:52:42.000000000 +0200
++++ opensc-0.19.0/m4/ax_pthread.m4 2021-10-04 22:29:18.960949785 +0200
+@@ -299,7 +299,7 @@
+ ax_pthread_save_CFLAGS="$CFLAGS"
+ for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
+ AS_IF([test "x$ax_pthread_try" = "xunknown"], [break])
+- CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
++ CFLAGS="-Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
+ ac_link="$ax_pthread_save_ac_link"
+ AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
+ [ac_link="$ax_pthread_2step_ac_link"