From ca65a73c9ecf76d49fc7df0060eae2c404e432ac Mon Sep 17 00:00:00 2001
From: Ruben Kerkhof <ruben@rubenkerkhof.com>
Date: Thu, 4 Aug 2016 15:34:43 +0200
Subject: [PATCH] sigrok: use pkg-config to find library

While we're doing that, look for a version less than 0.4, since we don't support that yet (#1574)
---
 configure.ac    | 73 ++++---------------------------------------------
 src/Makefile.am |  6 ++--
 2 files changed, 9 insertions(+), 70 deletions(-)

diff --git a/configure.ac b/configure.ac
index eaf98ec9..d04280a6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4512,74 +4512,13 @@ fi
 AM_CONDITIONAL(BUILD_WITH_LM_SENSORS, test "x$with_libsensors" = "xyes")
 # }}}
 
-# --with-libsigrok {{{
-with_libsigrok_cflags=""
-with_libsigrok_ldflags=""
-AC_ARG_WITH(libsigrok, [AS_HELP_STRING([--with-libsigrok@<:@=PREFIX@:>@], [Path to libsigrok.])],
-[
-	if test "x$withval" = "xno"
-	then
-		with_libsigrok="no"
-	else
-		with_libsigrok="yes"
-		if test "x$withval" != "xyes"
-		then
-			with_libsigrok_cflags="-I$withval/include"
-			with_libsigrok_ldflags="-L$withval/lib"
-		fi
-	fi
-],[with_libsigrok="yes"])
-
-# libsigrok has a glib dependency
-if test "x$with_libsigrok" = "xyes"
-then
-m4_ifdef([AM_PATH_GLIB_2_0],
-	[
-	 AM_PATH_GLIB_2_0([2.28.0],
-	 	[with_libsigrok_cflags="$with_libsigrok_cflags $GLIB_CFLAGS"; with_libsigrok_ldflags="$with_libsigrok_ldflags $GLIB_LIBS"])
-	],
-	[
-	 with_libsigrok="no (glib not available)"
-	]
+# libsigrok {{{
+AC_SUBST([LIBSIGROK_CFLAGS])
+AC_SUBST([LIBSIGROK_LIBS])
+PKG_CHECK_MODULES([LIBSIGROK], [libsigrok < 0.4],
+  [with_libsigrok="yes"],
+  [with_libsigrok="no (pkg-config could not find libsigrok)"]
 )
-fi
-
-# libsigrok headers
-if test "x$with_libsigrok" = "xyes"
-then
-	SAVE_CPPFLAGS="$CPPFLAGS"
-	CPPFLAGS="$CPPFLAGS $with_libsigrok_cflags"
-
-	AC_CHECK_HEADERS(libsigrok/libsigrok.h, [], [with_libsigrok="no (libsigrok/libsigrok.h not found)"])
-
-	CPPFLAGS="$SAVE_CPPFLAGS"
-fi
-
-# libsigrok library
-if test "x$with_libsigrok" = "xyes"
-then
-	SAVE_CPPFLAGS="$CPPFLAGS"
-	SAVE_LDFLAGS="$LDFLAGS"
-	CPPFLAGS="$CPPFLAGS $with_libsigrok_cflags"
-	LDFLAGS="$LDFLAGS $with_libsigrok_ldflags"
-
-	AC_CHECK_LIB(sigrok, sr_init,
-	[
-		AC_DEFINE(HAVE_LIBSIGROK, 1, [Define to 1 if you have the sigrok library (-lsigrok).])
-	],
-	[with_libsigrok="no (libsigrok not found)"])
-
-	CPPFLAGS="$SAVE_CPPFLAGS"
-	LDFLAGS="$SAVE_LDFLAGS"
-fi
-if test "x$with_libsigrok" = "xyes"
-then
-	BUILD_WITH_LIBSIGROK_CFLAGS="$with_libsigrok_cflags"
-	BUILD_WITH_LIBSIGROK_LDFLAGS="$with_libsigrok_ldflags"
-	AC_SUBST(BUILD_WITH_LIBSIGROK_CFLAGS)
-	AC_SUBST(BUILD_WITH_LIBSIGROK_LDFLAGS)
-fi
-AM_CONDITIONAL(BUILD_WITH_LIBSIGROK, test "x$with_libsigrok" = "xyes")
 # }}}
 
 # --with-libstatgrab {{{
diff --git a/src/Makefile.am b/src/Makefile.am
index a4ca01e7..a262eca6 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -957,9 +957,9 @@ endif
 if BUILD_PLUGIN_SIGROK
 pkglib_LTLIBRARIES += sigrok.la
 sigrok_la_SOURCES = sigrok.c
-sigrok_la_CFLAGS = $(AM_CFLAGS) $(BUILD_WITH_LIBSIGROK_CFLAGS)
-sigrok_la_LDFLAGS = $(PLUGIN_LDFLAGS) $(BUILD_WITH_LIBSIGROK_LDFLAGS)
-sigrok_la_LIBADD = -lsigrok
+sigrok_la_CFLAGS = $(AM_CFLAGS) $(LIBSIGROK_CFLAGS)
+sigrok_la_LDFLAGS = $(PLUGIN_LDFLAGS)
+sigrok_la_LIBADD = $(LIBSIGROK_LIBS)
 endif
 
 if BUILD_PLUGIN_SMART
-- 
2.30.2