From 263381ddd46eea2293c70bc811273b66bc52087b Mon Sep 17 00:00:00 2001
From: Mateusz Marciniec <mateuszmar2@gmail.com>
Date: Fri, 19 Aug 2022 14:47:49 +0200
Subject: [PATCH] configure.ac: Improve check for magic

Check whether magic.h header exists before defining HAVE_MAGIC.

Despite library availability there still can be missing header.
Current test doesn't cover that possibility which will lead compilation
to fail in case of separate sysroot.

Upstream-Status: Backport
[https://github.com/util-linux/util-linux/commit/263381ddd46eea2293c70bc811273b66bc52087b]

Signed-off-by: Mateusz Marciniec <mateuszmar2@gmail.com>
Signed-off-by: Tomasz Dziendzielski <tomasz.dziendzielski@gmail.com>
---
 configure.ac | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index daa8f0dca..968a0daf0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1570,8 +1570,10 @@ AC_ARG_WITH([libmagic],
 )
 AS_IF([test "x$with_libmagic" = xno], [have_magic=no], [
   AC_CHECK_LIB([magic], [magic_open], [
-    AC_DEFINE([HAVE_MAGIC], [1], [Define to 1 if you have the libmagic present.])
-    MAGIC_LIBS="-lmagic"
+    AC_CHECK_HEADER(magic.h, [
+      AC_DEFINE([HAVE_MAGIC], [1], [Define to 1 if you have the libmagic present.])
+      MAGIC_LIBS="-lmagic"
+    ])
   ])
 ])
 AC_SUBST([MAGIC_LIBS])
-- 
2.37.1