Define __EXTENSIONS__ on Solaris. Fixes posixmodule error in bug #232787.
diff --git a/acconfig.h b/acconfig.h
index 045e454..3f7829f 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -25,6 +25,9 @@
/* Define to `long' if <time.h> doesn't define. */
#undef clock_t
+/* Defined on Solaris to see additional function prototypes. */
+#undef __EXTENSIONS__
+
/* Define if getpgrp() must be called as getpgrp(0). */
#undef GETPGRP_HAVE_ARG
diff --git a/config.h.in b/config.h.in
index 9c0483f..a390fa3 100644
--- a/config.h.in
+++ b/config.h.in
@@ -90,6 +90,9 @@
/* Define to `long' if <time.h> doesn't define. */
#undef clock_t
+/* Defined on Solaris to see additional function prototypes. */
+#undef __EXTENSIONS__
+
/* Define if getpgrp() must be called as getpgrp(0). */
#undef GETPGRP_HAVE_ARG
diff --git a/configure.in b/configure.in
index 92a5b46..0818a9c 100644
--- a/configure.in
+++ b/configure.in
@@ -194,8 +194,13 @@
case $CC in
cc) CC="$CC -Wl,-Bexport";;
esac;;
+SunOS*)
+ # Some functions have a prototype only with that define, e.g. confstr
+ AC_DEFINE(__EXTENSIONS__)
+ ;;
esac
+
AC_SUBST(LIBRARY)
AC_MSG_CHECKING(LIBRARY)
if test -z "$LIBRARY"