autotools: check for expat.h if pkg-config failed

Some distros provides libexpat without expat.pc. So PKG_CHECK_MODULES fails even if libexpat is installed. To fix this AC_CHECK_HEADER added back.
strophe · Aug 8, 2014 · d693cc6 · d693cc6
1 parent 46f371b
commit d693cc6
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/configure.ac b/configure.ac
@@ -31,7 +31,8 @@ if test "x$with_libxml2" != xno; then
     CFLAGS=$old_CFLAGS
   fi
 else
-  PKG_CHECK_MODULES([expat], [expat >= 2.0.0], [], [AC_MSG_ERROR([expat not found; expat required.])])
+  PKG_CHECK_MODULES([expat], [expat >= 2.0.0], [],
+                    [AC_CHECK_HEADER(expat.h, [expat_LIBS="-lexpat"], [AC_MSG_ERROR([expat not found; expat required.])])])
 fi
 
 if test "x$with_libxml2" = xyes; then