Changeset d9b757b in freewrt

Timestamp:

Jan 16, 2007, 6:40:15 PM (19 years ago)

Author:

Thorsten Glaser <tg@…>

Children:

53a8dc7

Parents:

5257e40

Message:

• add -fwrapv to the default target cflags, we don't use gcc <3.3 which is the first one to support it (atm we use gcc 3.4), this is required, see ​http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30475#c2

Note: this still does not eliminate all problems in gcc3, see

​http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30477 for details

• also add -fwrapv to the default *build* cflags, people whose build OSes have gcc <3.3 or non-gcc are SOL unless they predefine CFLAGS. ​http://gcc.gnu.org/ml/gcc/2006-12/msg00749.html implies that gcc it- self with -On (n>0) or -fno-wrapv miscompiles itself(!), and in com- bination with gcc PR#30477 this means that any gcc2 or gcc3 on the *build* os potentially miscompiles gcc for the target too.

git-svn-id: ​svn://www.freewrt.org/branches/common-adk@1606 afb5a338-a214-0410-bd46-81f09a774fd1

File:

• rules.mk (modified) (1 diff)

rules.mk

@@ -69 +69 @@
 
 ifeq ($(strip ${CFLAGS}),)
-CFLAGS:=                -Os -fno-ident
+CFLAGS:=                -Os -fno-ident -fwrapv
 endif
 HOST_CFLAGS:=           ${CFLAGS}
-TARGET_CFLAGS:=         $(strip -Os -fno-ident ${TARGET_CFLAGS} -fhonour-copts)
+TARGET_CFLAGS:=         $(strip -Os -fno-ident ${TARGET_CFLAGS} -fwrapv -fhonour-copts)
 
 ifneq (${show},)