From f2d6e10b4fba24f1613af65cacf4b7df1576703b Mon Sep 17 00:00:00 2001
From: William Robinet <william.robinet@conostix.com>
Date: Wed, 6 Jan 2021 18:25:45 +0100
Subject: [PATCH] Add checks for libjson-c to configure.ac

---
 .github/workflows/clang.yml |  2 +-
 .github/workflows/gcc.yml   |  2 +-
 configure.ac                | 21 +++++++++++++++++++++
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/clang.yml b/.github/workflows/clang.yml
index 0f1acb0..e87c3f4 100644
--- a/.github/workflows/clang.yml
+++ b/.github/workflows/clang.yml
@@ -19,6 +19,6 @@ jobs:
     - name: autogen
       run: ./autogen.sh
     - name: configure
-      run: ./configure CC=/usr/bin/clang LDFLAGS="-ljson-c"
+      run: ./configure CC=/usr/bin/clang
     - name: make
       run: make
diff --git a/.github/workflows/gcc.yml b/.github/workflows/gcc.yml
index baae453..d09f539 100644
--- a/.github/workflows/gcc.yml
+++ b/.github/workflows/gcc.yml
@@ -19,6 +19,6 @@ jobs:
     - name: autogen
       run: ./autogen.sh
     - name: configure
-      run: ./configure CC=/usr/bin/gcc LDFLAGS="-ljson-c"
+      run: ./configure CC=/usr/bin/gcc
     - name: make
       run: make
diff --git a/configure.ac b/configure.ac
index 3e4ebf0..2101fdb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -94,6 +94,27 @@ files with
 	])
 fi
 
+have_libjson_c=no
+AC_SEARCH_LIBS([json_object_new_object], [json-c], [have_libjson_c=yes])
+
+if test "x${have_libjson_c}" = xyes; then
+	AC_CHECK_HEADERS([json-c/json.h], [], [have_libjson_c=no])
+fi
+
+if test "x${have_libjson_c}" = xno; then
+	AC_MSG_ERROR([
+---------------------------------------
+Unable to find libjson-c on this system
+Check 'config.log' for more information
+
+On Debian and Ubuntu systems you can
+install the required library and header
+files with
+  apt install libjson-c-dev
+---------------------------------------
+	])
+fi
+
 AC_ARG_ENABLE([optimization],
 	[  --disable-optimization  disable compiler optimizations],
 	[optimization=${enableval}], [optimization=yes])