Fix build for heur (#4)

Author: gkobeaga

.github/workflows/build-test.yml .github/workflows/build-exact.yml

@@ -1,5 +1,5 @@
 
-name: Build
+name: Build-Exact
 
 on:
   pull_request:

.github/workflows/build-heur.yml

@@ -0,0 +1,30 @@
+
+name: Build-Heur
+
+on:
+  pull_request:
+    paths-ignore:
+      - '**.md'
+  push:
+    branches: [ main ]
+    paths-ignore:
+      - '**.md'
+
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: autogen
+        run: ./autogen.sh
+      - name: configure
+        run: ./configure
+      - name: make
+        run: make  
+      - name: make check
+        run: make check
+        #- name: make distcheck
+        #run: make distcheck

README.md

@@ -1,7 +1,8 @@
 # op-solver
 > Algorithms for the Orienteering Problem
 
-[![Actions Status](https://github.com/gkobeaga/op-solver/workflows/Build/badge.svg)](https://github.com/gkobeaga/op-solver/actions)
+[![Actions Status](https://github.com/gkobeaga/op-solver/workflows/Build-Heur/badge.svg)](https://github.com/gkobeaga/op-solver/actions)
+[![Actions Status](https://github.com/gkobeaga/op-solver/workflows/Build-Exact/badge.svg)](https://github.com/gkobeaga/op-solver/actions)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/gkobeaga/op-solver/blob/master/LICENSE)
 
 ----

src/Makefile.am

@@ -4,17 +4,19 @@ SUBDIRS = lib data graph
 SUBDIRS += cp ip kp lp op tsp
 
 lib_LTLIBRARIES     = libopsolver.la
-libopsolver_la_LIBADD = data/libsolver-data.la \
-		      graph/libsolver-graph.la \
-		      lib/libsolver-lib.la \
-		      cp/libsolver-cp.la \
-		      ip/libsolver-ip.la \
-		      kp/libsolver-kp.la \
-		      lp/libsolver-lp.la \
-		      tsp/libsolver-tsp.la
+libopsolver_la_LIBADD = \
+			data/libsolver-data.la \
+			graph/libsolver-graph.la \
+			lib/libsolver-lib.la \
+			cp/libsolver-cp.la \
+			kp/libsolver-kp.la \
+			tsp/libsolver-tsp.la
 
 if HAVE_LP_SOLVER
-libopsolver_la_LIBADD += @LP_SOLVER_LIB@ -lpthread -lgmp
+libopsolver_la_LIBADD += \
+			 ip/libsolver-ip.la \
+			 lp/libsolver-lp.la \
+			 @LP_SOLVER_LIB@ -lpthread -lgmp
 endif
 libopsolver_la_SOURCES =