https://github.com/pbiering/ipv6calc/pull/35

From e73dfa578b2af3f75b86e7584cfffcad79d75764 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Thu, 15 Sep 2022 00:23:37 +0100
Subject: [PATCH] Fix underlinking with -lm (LDFLAGS order)

LDFLAGS must come _before_ any libraries,
as some take effect based on arguments afterwards.

For example, -Wl,--as-needed (which some distributions
set by default, even) will discard (or not know about)
any objects listed before it.

See also e.g.
https://wiki.gentoo.org/wiki/Project:Quality_Assurance/As-needed#Importance_of_linking_order.

Bug: https://bugs.gentoo.org/661536
Signed-off-by: Sam James <sam@gentoo.org>
--- a/ipv6calc/Makefile.in
+++ b/ipv6calc/Makefile.in
@@ -49,10 +49,10 @@ libipv6calc_db_wrapper:
 		cd ../ && ${MAKE} lib-make
 
 ipv6calc:	$(OBJS) libipv6calc libipv6calc_db_wrapper
-		$(CC) -o ipv6calc $(OBJS) $(GETOBJS) $(LIBS) -lm $(LDFLAGS) $(LDFLAGS_EXTRA)
+		$(CC) -o ipv6calc $(OBJS) $(GETOBJS) $(LDFLAGS) $(LDFLAGS_EXTRA) $(LIBS) -lm
 
 static:		ipv6calc
-		$(CC) -o ipv6calc-static $(OBJS) $(GETOBJS) $(LIBS) -lm $(LDFLAGS) $(LDFLAGS_EXTRA_STATIC) -static
+		$(CC) -o ipv6calc-static $(OBJS) $(GETOBJS) $(LDFLAGS) $(LDFLAGS_EXTRA_STATIC) $(LIBS) -lm -static
 
 distclean:
 		${MAKE} clean
--- a/ipv6loganon/Makefile.in
+++ b/ipv6loganon/Makefile.in
@@ -49,10 +49,10 @@ libipv6calc_db_wrapper:
 		cd ../ && ${MAKE} lib-make
 
 ipv6loganon:	$(OBJS) libipv6calc libipv6calc_db_wrapper
-		$(CC) -o ipv6loganon $(OBJS) $(GETOBJS) $(LIBS) -lm $(LDFLAGS) $(LDFLAGS_EXTRA)
+		$(CC) -o ipv6loganon $(OBJS) $(GETOBJS) $(LDFLAGS) $(LDFLAGS_EXTRA) $(LIBS) -lm
 
 static:		ipv6loganon
-		$(CC) -o ipv6loganon-static $(OBJS) $(GETOBJS) $(LIBS) -lm $(LDFLAGS) $(LDFLAGS_EXTRA_STATIC) -static
+		$(CC) -o ipv6loganon-static $(OBJS) $(GETOBJS) $(LDFLAGS) $(LDFLAGS_EXTRA_STATIC) $(LIBS) -lm -static
 
 distclean:
 		${MAKE} clean
--- a/ipv6logconv/Makefile.in
+++ b/ipv6logconv/Makefile.in
@@ -49,10 +49,10 @@ libipv6calc_db_wrapper:
 		cd ../ && ${MAKE} lib-make
 
 ipv6logconv:	$(OBJS) libipv6calc libipv6calc_db_wrapper
-		$(CC) -o ipv6logconv $(OBJS) $(GETOBJS) $(LIBS) -lm $(LDFLAGS) $(LDFLAGS_EXTRA)
+		$(CC) -o ipv6logconv $(OBJS) $(GETOBJS) $(LDFLAGS) $(LDFLAGS_EXTRA) $(LIBS) -lm
 
 static:		ipv6logconv
-		$(CC) -o ipv6logconv-static $(OBJS) $(GETOBJS) $(LIBS) -lm $(LDFLAGS) $(LDFLAGS_EXTRA_STATIC) -static
+		$(CC) -o ipv6logconv-static $(OBJS) $(GETOBJS) $(LDFLAGS) $(LDFLAGS_EXTRA_STATIC) $(LIBS) -lm -static
 
 distclean:
 		${MAKE} clean
--- a/ipv6logstats/Makefile.in
+++ b/ipv6logstats/Makefile.in
@@ -49,10 +49,10 @@ libipv6calc_db_wrapper.a:
 $(OBJS):	ipv6logstatsoptions.h ipv6logstatshelp.h ipv6logstats.h
 
 ipv6logstats:	$(OBJS) libipv6calc.a libipv6calc_db_wrapper.a
-		$(CC) -o ipv6logstats $(OBJS) $(GETOBJS) $(LIBS) -lm $(LDFLAGS) $(LDFLAGS_EXTRA)
+		$(CC) -o ipv6logstats $(OBJS) $(GETOBJS) $(LDFLAGS) $(LDFLAGS_EXTRA) $(LIBS) -lm
 
 static:		ipv6logstats
-		$(CC) -o ipv6logstats-static $(OBJS) $(GETOBJS) $(LIBS) -lm $(LDFLAGS) $(LDFLAGS_EXTRA_STATIC) -static
+		$(CC) -o ipv6logstats-static $(OBJS) $(GETOBJS) $(LDFLAGS) $(LDFLAGS_EXTRA_STATIC) $(LIBS) -lm -static
 
 distclean:
 		${MAKE} clean