reduce netdata virtual memory size by setting MALLOC_ARENA_MAX; portable way of detec...

[netdata.git] / m4 / ax_c_mallinfo.m4

diff --git a/m4/ax_c_mallinfo.m4 b/m4/ax_c_mallinfo.m4
new file mode 100755 (executable)
index 0000000..a8f8cc2
--- /dev/null
+++ b/m4/ax_c_mallinfo.m4
@@ -0,0 +1,21 @@
+# AC_C_MALLINFO
+# -------------
+# Define HAVE_C_MALLINFO if mallinfo() works.
+AN_IDENTIFIER([mallinfo], [AC_C_MALLINFO])
+AC_DEFUN([AC_C_MALLINFO],
+[AC_CACHE_CHECK([for mallinfo], ac_cv_c_mallinfo,
+[AC_LINK_IFELSE(
+   [AC_LANG_SOURCE(
+      [[#include <malloc.h>
+        int main(int argc, char **argv) {
+          struct mallinfo mi = mallinfo();
+          printf("%d%d%d\n", mi.uordblks, mi.hblkhd, mi.arena);
+        }
+      ]])],
+   [ac_cv_c_mallinfo=yes],
+   [ac_cv_c_mallinfo=no])])
+if test $ac_cv_c_mallinfo = yes; then
+  AC_DEFINE([HAVE_C_MALLINFO], 1,
+           [Define to 1 if glibc mallinfo exists.])
+fi
+])# AC_C_MALLINFO