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-rw-r--r--configure.ac5
1 files changed, 2 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac
index 45c74776..9eb17ac2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -834,15 +834,14 @@ AC_C_BIGENDIAN
# Use -Werror because some compilers accept unknown attributes and just
# give a warning. If it works this should give no warnings, even
# clang -Weverything should be fine.
-# dnl This doesn't need AC_LANG_SOURCE, minimal code is enough.
AC_MSG_CHECKING([if __attribute__((__constructor__)) can be used])
have_func_attribute_constructor=no
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
-AC_COMPILE_IFELSE([
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
__attribute__((__constructor__))
static void my_constructor_func(void) { return; }
-], [
+]])], [
AC_DEFINE([HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR], [1],
[Define to 1 if __attribute__((__constructor__))
is supported for functions.])