From a2c67588d0f686e0007dadcaf0e4bbb35c0e1e83 Mon Sep 17 00:00:00 2001
From: Konstantin Makarchev <kostya27@gmail.com>
Date: Sun, 10 Jun 2018 07:43:26 +0300
Subject: [PATCH] fix compilation with glibc 2.26, major/minor functions, fixed
 #2
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compilation error was:
  linux_sigar.c:1156:22: error: called object ‘major’ is not a function or function pointer
  linux_sigar.c:1157:22: error: called object ‘minor’ is not a function or function pointer
---
 bindings/ruby/extconf.rb   | 3 +++
 src/os/linux/linux_sigar.c | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/bindings/ruby/extconf.rb b/bindings/ruby/extconf.rb
index cc11896a..b81156ba 100644
--- a/bindings/ruby/extconf.rb
+++ b/bindings/ruby/extconf.rb
@@ -49,6 +49,9 @@ when /mswin|mingw|cygwin|bccwin/
   have_library("version")
 when /linux/
   os = 'linux'
+  if have_header("sys/sysmacros.h")
+    $CPPFLAGS += ' -DLINUX_SYSMACROS'
+  end
 when /solaris|sun/
   os = 'solaris'
   have_library("nsl")
diff --git a/src/os/linux/linux_sigar.c b/src/os/linux/linux_sigar.c
index 57aeab18..e3c72a85 100644
--- a/src/os/linux/linux_sigar.c
+++ b/src/os/linux/linux_sigar.c
@@ -30,6 +30,10 @@
 #include "sigar_util.h"
 #include "sigar_os.h"
 
+#ifdef LINUX_SYSMACROS // added by extconf.rb
+    #include <sys/sysmacros.h>
+#endif
+
 #define pageshift(x) ((x) << sigar->pagesize)
 
 #define PROC_MEMINFO PROC_FS_ROOT "meminfo"