From: Karel Zak <kzak@redhat.com>
Date: Wed, 8 Jun 2016 11:38:48 +0000 (+0200)
Subject: build-sys: workaround for autoconf "present but cannot be compiled"
X-Git-Tag: v2.28.1~31
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=9a12bc245d5c68549891f432917c9b6e2fba4b33;p=thirdparty%2Futil-linux.git

build-sys: workaround for autoconf "present but cannot be compiled"

See also:
https://www.gnu.org/software/autoconf/manual/autoconf-2.64/html_node/Present-But-Cannot-Be-Compiled.html

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/configure.ac b/configure.ac
index 70df8c6b43..8a0ce94c75 100644
--- a/configure.ac
+++ b/configure.ac
@@ -216,7 +216,6 @@ AC_CHECK_HEADERS([ \
 	linux/fd.h \
 	linux/raw.h \
 	linux/tiocl.h \
-	linux/gsmmux.h \
 	linux/version.h \
 	linux/securebits.h \
 	locale.h \
@@ -262,6 +261,12 @@ AC_CHECK_HEADERS([ \
 	utmp.h \
 ])
 
+AC_CHECK_HEADERS([linux/gsmmux.h ], [], [],
+ [#ifdef LINUX_GSMMUX_H
+   # include <linux/gsmmux.h>
+   #endif
+])
+
 AC_CHECK_HEADERS([security/pam_misc.h],
 		[AM_CONDITIONAL([HAVE_LINUXPAM], [true])],
 		[AM_CONDITIONAL([HAVE_LINUXPAM], [false])], [