- check if CC supports -funsigned-char

- add CC_MAJOR and CC_MINOR variables. (gcc centric for now)


git-svn-id: svn://busybox.net/trunk/busybox@12871 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 9 insertions, 1 deletions

diff --git a/Rules.mak b/Rules.mak
index b3ebeac1f..fdac364b9 100644
--- a/Rules.mak
+++ b/Rules.mak
@@ -81,9 +81,15 @@ CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
 #GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
 
 WARNINGS=-Wall -Wstrict-prototypes -Wshadow
-CFLAGS=-I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir) -funsigned-char
+CFLAGS=-I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir)
 ARFLAGS=cru
 
+
+# gcc centric. Perhaps fiddle with findstring gcc,$(CC) for the rest
+# get the CC MAJOR/MINOR version
+CC_MAJOR:=$(shell printf "%02d" $(shell echo __GNUC__ | $(CC) -E -xc - | tail -n 1))
+CC_MINOR:=$(shell printf "%02d" $(shell echo __GNUC_MINOR__ | $(CC) -E -xc - | tail -n 1))
+
 #--------------------------------------------------------
 export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
 ifeq ($(strip $(TARGET_ARCH)),)
@@ -117,6 +123,8 @@ export MAKE_IS_SILENT=y
 SECHO=-@false
 endif
 
+CFLAGS+=$(call check_gcc,-funsigned-char,)
+
 #--------------------------------------------------------
 # Arch specific compiler optimization stuff should go here.
 # Unless you want to override the defaults, do not set anything