Try to autodetect the libiconv

Makefile

@@ -33,10 +33,11 @@ CFLAGS  += -g -funsigned-char -O2
 CFLAGS  += -D_FILE_OFFSET_BITS=64
 CFLAGS  += -I${BUILDDIR} -I${ROOTDIR}/src -I${ROOTDIR}
 LDFLAGS += -ldl -lpthread -lm
+ifeq ($(LIBICONV),yes)
+LDFLAGS += -liconv
+endif
 ifneq ($(PLATFORM), darwin)
 LDFLAGS += -lrt
-else
-LDFLAGS += -liconv
 endif
 
 ifeq ($(COMPILER), clang)

configure

@@ -134,6 +134,16 @@ int test(void)
   return 0;
 }
 '
+
+check_cc_snippet libiconv '
+#include <iconv.h>
+int test(void)
+{
+  iconv_t ic = iconv_open("ASCII", "ASCII");
+  return 0;
+}
+' -liconv
+
 #
 # Python
 #