commit fafed376e7f4bb00014a101f0156c475fd964374
Author: Tobias Brunner <tobias@strongswan.org>
Date:   Wed Jul 30 16:01:41 2014 +0200

    imv-swid: Use pkg-config to check for libjson-c
    
    The package/library is called libjson-c on recent distributions.
    Some like Ubuntu 14.04 provide symlinks with the old name but these
    will eventually disappear.  Using pkg-config allows us to easily check
    for it (with a fallback) and configure the proper compiler flags.
    
    Fixes #663.

diff --git a/configure.ac b/configure.ac
index 497240f..695fa45 100644
--- a/configure.ac
+++ b/configure.ac
@@ -876,8 +876,10 @@ if test x$tss = xtrousers; then
 fi
 
 if test x$imv_swid = xtrue; then
-	AC_CHECK_LIB([json],[main],[LIBS="$LIBS"],[AC_MSG_ERROR([JSON library libjson not found])],[])
-	AC_CHECK_HEADER([json/json.h],,[AC_MSG_ERROR([JSON header json/json.h not found!])])
+	PKG_CHECK_MODULES(json, [json-c], [],
+		[PKG_CHECK_MODULES(json, [json])])
+	AC_SUBST(json_CFLAGS)
+	AC_SUBST(json_LIBS)
 fi
 
 if test x$dumm = xtrue; then
diff --git a/src/libpts/plugins/imv_swid/Makefile.am b/src/libpts/plugins/imv_swid/Makefile.am
index 77f33e6..9305484 100644
--- a/src/libpts/plugins/imv_swid/Makefile.am
+++ b/src/libpts/plugins/imv_swid/Makefile.am
@@ -5,7 +5,7 @@ AM_CPPFLAGS = \
 	-I$(top_srcdir)/src/libpts
 
 AM_CFLAGS = \
-	$(PLUGIN_CFLAGS)
+	$(PLUGIN_CFLAGS) $(json_CFLAGS)
 
 imcv_LTLIBRARIES = imv-swid.la
 
@@ -13,7 +13,7 @@ imv_swid_la_LIBADD = \
 	$(top_builddir)/src/libimcv/libimcv.la \
 	$(top_builddir)/src/libpts/libpts.la \
 	$(top_builddir)/src/libstrongswan/libstrongswan.la \
-	-ljson
+	$(json_LIBS)
 
 imv_swid_la_SOURCES = \
 	imv_swid.c imv_swid_state.h imv_swid_state.c \
diff --git a/src/libpts/plugins/imv_swid/imv_swid_rest.h b/src/libpts/plugins/imv_swid/imv_swid_rest.h
index 93e3d6a..32392cb 100644
--- a/src/libpts/plugins/imv_swid/imv_swid_rest.h
+++ b/src/libpts/plugins/imv_swid/imv_swid_rest.h
@@ -26,7 +26,7 @@
 
 #include <library.h>
 
-#include <json/json.h>
+#include <json.h>
 
 typedef struct imv_swid_rest_t imv_swid_rest_t;
 
diff --git a/src/libpts/plugins/imv_swid/imv_swid_state.h b/src/libpts/plugins/imv_swid/imv_swid_state.h
index 7ffabfd..a6a8d03 100644
--- a/src/libpts/plugins/imv_swid/imv_swid_state.h
+++ b/src/libpts/plugins/imv_swid/imv_swid_state.h
@@ -28,7 +28,7 @@
 #include <swid/swid_inventory.h>
 #include <library.h>
 
-#include <json/json.h>
+#include <json.h>
 
 typedef struct imv_swid_state_t imv_swid_state_t;
 typedef enum imv_swid_handshake_state_t imv_swid_handshake_state_t;