Add error message if eigen is not found at configure time (autotools).

opencollab · Jan 12, 2019 · c037179 · c037179
1 parent a580f6f
commit c037179
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/configure.ac b/configure.ac
@@ -77,7 +77,7 @@ AC_ARG_ENABLE([icb-exmm],
               [AS_VAR_SET([enable_icb_exmm], [no])])
 
 if test x"$enable_icb_exmm" != x"no"; then
-	PKG_CHECK_MODULES([EIGEN3], [eigen3 >= 3.2])
+	PKG_CHECK_MODULES([EIGEN3], [eigen3 >= 3.2], [], [AC_MSG_ERROR([Eigen not found. Give hints with PKG_CONFIG_PATH])])
 	AC_LANG_PUSH([C++])
 	CPPFLAGS_SAVE=$CPPFLAGS
 	CPPFLAGS=$EIGEN3_CFLAGS