检测gcc是否支持给定的选项 cc-option

#shell:

CFLAGS=

CC=gcc

ARG1=

ARG2=

 

if $CC $CFLAGS $ARG1 -S -o /dev/null -xc /dev/null >/dev/null 2>&1

then

    echo "$ARG1"

else

    echo "$ARG2"

fi

 

#GNU Makefile;

cc-option=$(shell $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null > \

 /dev/null 2>&1 ;then echo "$(1)";else echo "$(2)";fi;)

PLATFORM_CPPFLAGS +=$(call cc-option,-mapcs-32,-mabi=apcs-gnu)

 

 

2:标准错误

1：标准输出