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-rw-r--r--build/m4/ax_c_mallopt.m420
1 files changed, 20 insertions, 0 deletions
diff --git a/build/m4/ax_c_mallopt.m4 b/build/m4/ax_c_mallopt.m4
new file mode 100644
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--- /dev/null
+++ b/build/m4/ax_c_mallopt.m4
@@ -0,0 +1,20 @@
+# AC_C_MALLOPT
+# -------------
+# Define HAVE_C_MALLOPT if mallopt() works.
+AN_IDENTIFIER([mallopt], [AC_C_MALLOPT])
+AC_DEFUN([AC_C_MALLOPT],
+[AC_CACHE_CHECK([for mallopt], ac_cv_c_mallopt,
+[AC_LINK_IFELSE(
+ [AC_LANG_SOURCE(
+ [[#include <malloc.h>
+ int main(int argc, char **argv) {
+ mallopt(M_ARENA_MAX, 1);
+ }
+ ]])],
+ [ac_cv_c_mallopt=yes],
+ [ac_cv_c_mallopt=no])])
+if test $ac_cv_c_mallopt = yes; then
+ AC_DEFINE([HAVE_C_MALLOPT], 1,
+ [Define to 1 if glibc mallopt exists.])
+fi
+])# AC_C_MALLOPT